int
mixer_handle_text_create_mixer()
{
/* only run on update */
if (!mixer_update_pending) {
return 0;
}
/* do not allow a mixer change while safety off and FMU armed */
if ((r_status_flags & PX4IO_P_STATUS_FLAGS_SAFETY_OFF) &&
(r_setup_arming & PX4IO_P_SETUP_ARMING_FMU_ARMED)) {
return 1;
}
/* abort if we're in the mixer - it will be tried again in the next iteration */
if (in_mixer) {
return 1;
}
/* process the text buffer, adding new mixers as their descriptions can be parsed */
unsigned resid = mixer_text_length;
mixer_group.load_from_buf(&mixer_text[0], resid);
/* if anything was parsed */
if (resid != mixer_text_length) {
isr_debug(2, "used %u", mixer_text_length - resid);
/* copy any leftover text to the base of the buffer for re-use */
if (resid > 0) {
memmove(&mixer_text[0], &mixer_text[mixer_text_length - resid], resid);
/* enforce null termination */
mixer_text[resid] = '\0';
}
mixer_text_length = resid;
}
mixer_update_pending = false;
return 0;
}
int
user_start(int argc, char *argv[])
{
/* run C++ ctors before we go any further */
up_cxxinitialize();
/* reset all to zero */
memset(&system_state, 0, sizeof(system_state));
/* configure the high-resolution time/callout interface */
hrt_init();
/* calculate our fw CRC so FMU can decide if we need to update */
calculate_fw_crc();
/*
* Poll at 1ms intervals for received bytes that have not triggered
* a DMA event.
*/
#ifdef CONFIG_ARCH_DMA
hrt_call_every(&serial_dma_call, 1000, 1000, (hrt_callout)stm32_serial_dma_poll, NULL);
#endif
/* print some startup info */
lowsyslog("\nPX4IO: starting\n");
/* default all the LEDs to off while we start */
LED_AMBER(false);
LED_BLUE(false);
LED_SAFETY(false);
#ifdef GPIO_LED4
LED_RING(false);
#endif
/* turn on servo power (if supported) */
#ifdef POWER_SERVO
POWER_SERVO(true);
#endif
/* turn off S.Bus out (if supported) */
#ifdef ENABLE_SBUS_OUT
ENABLE_SBUS_OUT(false);
#endif
/* start the safety switch handler */
safety_init();
/* configure the first 8 PWM outputs (i.e. all of them) */
up_pwm_servo_init(0xff);
/* initialise the control inputs */
controls_init();
/* set up the ADC */
adc_init();
/* start the FMU interface */
interface_init();
/* add a performance counter for mixing */
perf_counter_t mixer_perf = perf_alloc(PC_ELAPSED, "mix");
/* add a performance counter for controls */
perf_counter_t controls_perf = perf_alloc(PC_ELAPSED, "controls");
/* and one for measuring the loop rate */
perf_counter_t loop_perf = perf_alloc(PC_INTERVAL, "loop");
struct mallinfo minfo = mallinfo();
lowsyslog("MEM: free %u, largest %u\n", minfo.mxordblk, minfo.fordblks);
/* initialize PWM limit lib */
pwm_limit_init(&pwm_limit);
/*
* P O L I C E L I G H T S
*
* Not enough memory, lock down.
*
* We might need to allocate mixers later, and this will
* ensure that a developer doing a change will notice
* that he just burned the remaining RAM with static
* allocations. We don't want him to be able to
* get past that point. This needs to be clearly
* documented in the dev guide.
*
*/
if (minfo.mxordblk < 600) {
lowsyslog("ERR: not enough MEM");
bool phase = false;
while (true) {
if (phase) {
LED_AMBER(true);
LED_BLUE(false);
} else {
LED_AMBER(false);
LED_BLUE(true);
}
up_udelay(250000);
phase = !phase;
}
}
/* Start the failsafe led init */
failsafe_led_init();
/*
* Run everything in a tight loop.
*/
uint64_t last_debug_time = 0;
uint64_t last_heartbeat_time = 0;
for (;;) {
/* track the rate at which the loop is running */
perf_count(loop_perf);
/* kick the mixer */
perf_begin(mixer_perf);
mixer_tick();
perf_end(mixer_perf);
/* kick the control inputs */
perf_begin(controls_perf);
controls_tick();
perf_end(controls_perf);
if ((hrt_absolute_time() - last_heartbeat_time) > 250 * 1000) {
last_heartbeat_time = hrt_absolute_time();
heartbeat_blink();
}
ring_blink();
check_reboot();
/* check for debug activity (default: none) */
show_debug_messages();
/* post debug state at ~1Hz - this is via an auxiliary serial port
* DEFAULTS TO OFF!
*/
if (hrt_absolute_time() - last_debug_time > (1000 * 1000)) {
isr_debug(1, "d:%u s=0x%x a=0x%x f=0x%x m=%u",
(unsigned)r_page_setup[PX4IO_P_SETUP_SET_DEBUG],
(unsigned)r_status_flags,
(unsigned)r_setup_arming,
(unsigned)r_setup_features,
(unsigned)mallinfo().mxordblk);
last_debug_time = hrt_absolute_time();
}
}
}
static int
registers_set_one(uint8_t page, uint8_t offset, uint16_t value)
{
switch (page) {
case PX4IO_PAGE_STATUS:
switch (offset) {
case PX4IO_P_STATUS_ALARMS:
/* clear bits being written */
r_status_alarms &= ~value;
break;
case PX4IO_P_STATUS_FLAGS:
/*
* Allow FMU override of arming state (to allow in-air restores),
* but only if the arming state is not in sync on the IO side.
*/
if (!(r_status_flags & PX4IO_P_STATUS_FLAGS_ARM_SYNC)) {
r_status_flags = value;
}
break;
default:
/* just ignore writes to other registers in this page */
break;
}
break;
case PX4IO_PAGE_SETUP:
switch (offset) {
case PX4IO_P_SETUP_FEATURES:
value &= PX4IO_P_SETUP_FEATURES_VALID;
/* some of the options conflict - give S.BUS out precedence, then ADC RSSI, then PWM RSSI */
/* switch S.Bus output pin as needed */
#ifdef ENABLE_SBUS_OUT
ENABLE_SBUS_OUT(value & (PX4IO_P_SETUP_FEATURES_SBUS1_OUT | PX4IO_P_SETUP_FEATURES_SBUS2_OUT));
/* disable the conflicting options with SBUS 1 */
if (value & (PX4IO_P_SETUP_FEATURES_SBUS1_OUT)) {
value &= ~(PX4IO_P_SETUP_FEATURES_PWM_RSSI |
PX4IO_P_SETUP_FEATURES_ADC_RSSI |
PX4IO_P_SETUP_FEATURES_SBUS2_OUT);
}
/* disable the conflicting options with SBUS 2 */
if (value & (PX4IO_P_SETUP_FEATURES_SBUS2_OUT)) {
value &= ~(PX4IO_P_SETUP_FEATURES_PWM_RSSI |
PX4IO_P_SETUP_FEATURES_ADC_RSSI |
PX4IO_P_SETUP_FEATURES_SBUS1_OUT);
}
#endif
/* disable the conflicting options with ADC RSSI */
if (value & (PX4IO_P_SETUP_FEATURES_ADC_RSSI)) {
value &= ~(PX4IO_P_SETUP_FEATURES_PWM_RSSI |
PX4IO_P_SETUP_FEATURES_SBUS1_OUT |
PX4IO_P_SETUP_FEATURES_SBUS2_OUT);
}
/* disable the conflicting options with PWM RSSI (without effect here, but for completeness) */
if (value & (PX4IO_P_SETUP_FEATURES_PWM_RSSI)) {
value &= ~(PX4IO_P_SETUP_FEATURES_ADC_RSSI |
PX4IO_P_SETUP_FEATURES_SBUS1_OUT |
PX4IO_P_SETUP_FEATURES_SBUS2_OUT);
}
/* apply changes */
r_setup_features = value;
break;
case PX4IO_P_SETUP_ARMING:
value &= PX4IO_P_SETUP_ARMING_VALID;
/*
* Update arming state - disarm if no longer OK.
* This builds on the requirement that the FMU driver
* asks about the FMU arming state on initialization,
* so that an in-air reset of FMU can not lead to a
* lockup of the IO arming state.
*/
if (value & PX4IO_P_SETUP_ARMING_RC_HANDLING_DISABLED) {
r_status_flags |= PX4IO_P_STATUS_FLAGS_INIT_OK;
}
/*
* If the failsafe termination flag is set, do not allow the autopilot to unset it
*/
value |= (r_setup_arming & PX4IO_P_SETUP_ARMING_TERMINATION_FAILSAFE);
/*
* If failsafe termination is enabled and force failsafe bit is set, do not allow
* the autopilot to clear it.
*/
if (r_setup_arming & PX4IO_P_SETUP_ARMING_TERMINATION_FAILSAFE) {
value |= (r_setup_arming & PX4IO_P_SETUP_ARMING_FORCE_FAILSAFE);
}
r_setup_arming = value;
break;
case PX4IO_P_SETUP_PWM_RATES:
value &= PX4IO_P_SETUP_RATES_VALID;
pwm_configure_rates(value, r_setup_pwm_defaultrate, r_setup_pwm_altrate);
break;
case PX4IO_P_SETUP_PWM_DEFAULTRATE:
if (value < 50) {
value = 50;
}
if (value > 400) {
value = 400;
}
pwm_configure_rates(r_setup_pwm_rates, value, r_setup_pwm_altrate);
break;
case PX4IO_P_SETUP_PWM_ALTRATE:
if (value < 50) {
value = 50;
}
if (value > 400) {
value = 400;
}
pwm_configure_rates(r_setup_pwm_rates, r_setup_pwm_defaultrate, value);
break;
#ifdef CONFIG_ARCH_BOARD_PX4IO_V1
case PX4IO_P_SETUP_RELAYS:
value &= PX4IO_P_SETUP_RELAYS_VALID;
r_setup_relays = value;
POWER_RELAY1((value & PX4IO_P_SETUP_RELAYS_POWER1) ? 1 : 0);
POWER_RELAY2((value & PX4IO_P_SETUP_RELAYS_POWER2) ? 1 : 0);
POWER_ACC1((value & PX4IO_P_SETUP_RELAYS_ACC1) ? 1 : 0);
POWER_ACC2((value & PX4IO_P_SETUP_RELAYS_ACC2) ? 1 : 0);
break;
#endif
case PX4IO_P_SETUP_VBATT_SCALE:
r_page_setup[PX4IO_P_SETUP_VBATT_SCALE] = value;
break;
case PX4IO_P_SETUP_SET_DEBUG:
r_page_setup[PX4IO_P_SETUP_SET_DEBUG] = value;
isr_debug(0, "set debug %u\n", (unsigned)r_page_setup[PX4IO_P_SETUP_SET_DEBUG]);
break;
case PX4IO_P_SETUP_REBOOT_BL:
if (r_status_flags & PX4IO_P_STATUS_FLAGS_SAFETY_OFF) {
// don't allow reboot while armed
break;
}
// check the magic value
if (value != PX4IO_REBOOT_BL_MAGIC) {
break;
}
// we schedule a reboot rather than rebooting
// immediately to allow the IO board to ACK
// the reboot command
schedule_reboot(100000);
break;
case PX4IO_P_SETUP_DSM:
dsm_bind(value & 0x0f, (value >> 4) & 0xF);
break;
case PX4IO_P_SETUP_FORCE_SAFETY_ON:
if (value == PX4IO_FORCE_SAFETY_MAGIC) {
r_status_flags &= ~PX4IO_P_STATUS_FLAGS_SAFETY_OFF;
} else {
return -1;
}
break;
case PX4IO_P_SETUP_FORCE_SAFETY_OFF:
if (value == PX4IO_FORCE_SAFETY_MAGIC) {
r_status_flags |= PX4IO_P_STATUS_FLAGS_SAFETY_OFF;
} else {
return -1;
}
break;
case PX4IO_P_SETUP_RC_THR_FAILSAFE_US:
if (value > 650 && value < 2350) {
r_page_setup[PX4IO_P_SETUP_RC_THR_FAILSAFE_US] = value;
}
break;
default:
return -1;
}
break;
case PX4IO_PAGE_RC_CONFIG: {
/**
* do not allow a RC config change while safety is off
*/
if (r_status_flags & PX4IO_P_STATUS_FLAGS_SAFETY_OFF) {
break;
}
unsigned channel = offset / PX4IO_P_RC_CONFIG_STRIDE;
unsigned index = offset - channel * PX4IO_P_RC_CONFIG_STRIDE;
uint16_t *conf = &r_page_rc_input_config[channel * PX4IO_P_RC_CONFIG_STRIDE];
if (channel >= PX4IO_RC_INPUT_CHANNELS)
return -1;
/* disable the channel until we have a chance to sanity-check it */
conf[PX4IO_P_RC_CONFIG_OPTIONS] &= PX4IO_P_RC_CONFIG_OPTIONS_ENABLED;
switch (index) {
case PX4IO_P_RC_CONFIG_MIN:
case PX4IO_P_RC_CONFIG_CENTER:
case PX4IO_P_RC_CONFIG_MAX:
case PX4IO_P_RC_CONFIG_DEADZONE:
case PX4IO_P_RC_CONFIG_ASSIGNMENT:
conf[index] = value;
break;
case PX4IO_P_RC_CONFIG_OPTIONS:
value &= PX4IO_P_RC_CONFIG_OPTIONS_VALID;
r_status_flags |= PX4IO_P_STATUS_FLAGS_INIT_OK;
/* clear any existing RC disabled flag */
r_setup_arming &= ~(PX4IO_P_SETUP_ARMING_RC_HANDLING_DISABLED);
/* set all options except the enabled option */
conf[index] = value & ~PX4IO_P_RC_CONFIG_OPTIONS_ENABLED;
/* should the channel be enabled? */
/* this option is normally set last */
if (value & PX4IO_P_RC_CONFIG_OPTIONS_ENABLED) {
uint8_t count = 0;
bool disabled = false;
/* assert min..center..max ordering */
if (conf[PX4IO_P_RC_CONFIG_MIN] < 500) {
count++;
}
if (conf[PX4IO_P_RC_CONFIG_MAX] > 2500) {
count++;
}
if (conf[PX4IO_P_RC_CONFIG_CENTER] < conf[PX4IO_P_RC_CONFIG_MIN]) {
count++;
}
if (conf[PX4IO_P_RC_CONFIG_CENTER] > conf[PX4IO_P_RC_CONFIG_MAX]) {
count++;
}
/* assert deadzone is sane */
if (conf[PX4IO_P_RC_CONFIG_DEADZONE] > 500) {
count++;
}
if (conf[PX4IO_P_RC_CONFIG_ASSIGNMENT] == UINT8_MAX) {
disabled = true;
} else if ((conf[PX4IO_P_RC_CONFIG_ASSIGNMENT] >= PX4IO_RC_MAPPED_CONTROL_CHANNELS) &&
(conf[PX4IO_P_RC_CONFIG_ASSIGNMENT] != PX4IO_P_RC_CONFIG_ASSIGNMENT_MODESWITCH)) {
count++;
}
/* sanity checks pass, enable channel */
if (count) {
isr_debug(0, "ERROR: %d config error(s) for RC%d.\n", count, (channel + 1));
r_status_flags &= ~PX4IO_P_STATUS_FLAGS_INIT_OK;
} else if (!disabled) {
conf[index] |= PX4IO_P_RC_CONFIG_OPTIONS_ENABLED;
}
}
break;
/* inner switch: case PX4IO_P_RC_CONFIG_OPTIONS */
}
break;
/* case PX4IO_RC_PAGE_CONFIG */
}
case PX4IO_PAGE_TEST:
switch (offset) {
case PX4IO_P_TEST_LED:
LED_AMBER(value & 1);
break;
}
break;
default:
return -1;
}
return 0;
}
static int
registers_set_one(uint8_t page, uint8_t offset, uint16_t value)
{
switch (page) {
case PX4IO_PAGE_STATUS:
switch (offset) {
case PX4IO_P_STATUS_ALARMS:
/* clear bits being written */
r_status_alarms &= ~value;
break;
case PX4IO_P_STATUS_FLAGS:
/*
* Allow FMU override of arming state (to allow in-air restores),
* but only if the arming state is not in sync on the IO side.
*/
if (!(r_status_flags & PX4IO_P_STATUS_FLAGS_ARM_SYNC)) {
r_status_flags = value;
}
break;
default:
/* just ignore writes to other registers in this page */
break;
}
break;
case PX4IO_PAGE_SETUP:
switch (offset) {
case PX4IO_P_SETUP_FEATURES:
value &= PX4IO_P_SETUP_FEATURES_VALID;
r_setup_features = value;
/* no implemented feature selection at this point */
break;
case PX4IO_P_SETUP_ARMING:
value &= PX4IO_P_SETUP_ARMING_VALID;
/*
* Update arming state - disarm if no longer OK.
* This builds on the requirement that the FMU driver
* asks about the FMU arming state on initialization,
* so that an in-air reset of FMU can not lead to a
* lockup of the IO arming state.
*/
if ((r_setup_arming & PX4IO_P_SETUP_ARMING_ARM_OK) && !(value & PX4IO_P_SETUP_ARMING_ARM_OK)) {
r_status_flags &= ~PX4IO_P_STATUS_FLAGS_ARMED;
}
r_setup_arming = value;
break;
case PX4IO_P_SETUP_PWM_RATES:
value &= PX4IO_P_SETUP_RATES_VALID;
r_setup_pwm_rates = value;
/* XXX re-configure timers */
break;
case PX4IO_P_SETUP_PWM_LOWRATE:
if (value < 50)
value = 50;
if (value > 400)
value = 400;
r_setup_pwm_lowrate = value;
/* XXX re-configure timers */
break;
case PX4IO_P_SETUP_PWM_HIGHRATE:
if (value < 50)
value = 50;
if (value > 400)
value = 400;
r_setup_pwm_highrate = value;
/* XXX re-configure timers */
break;
case PX4IO_P_SETUP_RELAYS:
value &= PX4IO_P_SETUP_RELAYS_VALID;
r_setup_relays = value;
POWER_RELAY1(value & (1 << 0) ? 1 : 0);
POWER_RELAY2(value & (1 << 1) ? 1 : 0);
POWER_ACC1(value & (1 << 2) ? 1 : 0);
POWER_ACC2(value & (1 << 3) ? 1 : 0);
break;
case PX4IO_P_SETUP_SET_DEBUG:
debug_level = value;
isr_debug(0, "set debug %u\n", (unsigned)debug_level);
break;
default:
return -1;
}
break;
case PX4IO_PAGE_RC_CONFIG: {
unsigned channel = offset / PX4IO_P_RC_CONFIG_STRIDE;
unsigned index = offset - channel * PX4IO_P_RC_CONFIG_STRIDE;
uint16_t *conf = &r_page_rc_input_config[channel * PX4IO_P_RC_CONFIG_STRIDE];
if (channel >= MAX_CONTROL_CHANNELS)
return -1;
/* disable the channel until we have a chance to sanity-check it */
conf[PX4IO_P_RC_CONFIG_OPTIONS] &= PX4IO_P_RC_CONFIG_OPTIONS_ENABLED;
switch (index) {
case PX4IO_P_RC_CONFIG_MIN:
case PX4IO_P_RC_CONFIG_CENTER:
case PX4IO_P_RC_CONFIG_MAX:
case PX4IO_P_RC_CONFIG_DEADZONE:
case PX4IO_P_RC_CONFIG_ASSIGNMENT:
conf[index] = value;
break;
case PX4IO_P_RC_CONFIG_OPTIONS:
value &= PX4IO_P_RC_CONFIG_OPTIONS_VALID;
/* set all options except the enabled option */
conf[index] = value & ~PX4IO_P_RC_CONFIG_OPTIONS_ENABLED;
/* should the channel be enabled? */
/* this option is normally set last */
if (value & PX4IO_P_RC_CONFIG_OPTIONS_ENABLED) {
/* assert min..center..max ordering */
if (conf[PX4IO_P_RC_CONFIG_MIN] < 500)
break;
if (conf[PX4IO_P_RC_CONFIG_MAX] > 2500)
break;
if (conf[PX4IO_P_RC_CONFIG_CENTER] < conf[PX4IO_P_RC_CONFIG_MIN])
break;
if (conf[PX4IO_P_RC_CONFIG_CENTER] > conf[PX4IO_P_RC_CONFIG_MAX])
break;
/* assert deadzone is sane */
if (conf[PX4IO_P_RC_CONFIG_DEADZONE] > 500)
break;
if (conf[PX4IO_P_RC_CONFIG_MIN] > (conf[PX4IO_P_RC_CONFIG_CENTER] - conf[PX4IO_P_RC_CONFIG_DEADZONE]))
break;
if (conf[PX4IO_P_RC_CONFIG_MAX] < (conf[PX4IO_P_RC_CONFIG_CENTER] + conf[PX4IO_P_RC_CONFIG_DEADZONE]))
break;
if (conf[PX4IO_P_RC_CONFIG_ASSIGNMENT] >= MAX_CONTROL_CHANNELS)
break;
/* sanity checks pass, enable channel */
conf[index] |= PX4IO_P_RC_CONFIG_OPTIONS_ENABLED;
}
break;
/* inner switch: case PX4IO_P_RC_CONFIG_OPTIONS */
}
break;
/* case PX4IO_RC_PAGE_CONFIG */
}
default:
return -1;
}
return 0;
}
static int
registers_set_one(uint8_t page, uint8_t offset, uint16_t value)
{
switch (page) {
case PX4IO_PAGE_STATUS:
switch (offset) {
case PX4IO_P_STATUS_ALARMS:
/* clear bits being written */
r_status_alarms &= ~value;
break;
case PX4IO_P_STATUS_FLAGS:
/*
* Allow FMU override of arming state (to allow in-air restores),
* but only if the arming state is not in sync on the IO side.
*/
if (!(r_status_flags & PX4IO_P_STATUS_FLAGS_ARM_SYNC)) {
r_status_flags = value;
}
break;
default:
/* just ignore writes to other registers in this page */
break;
}
break;
case PX4IO_PAGE_SETUP:
switch (offset) {
case PX4IO_P_SETUP_FEATURES:
value &= PX4IO_P_SETUP_FEATURES_VALID;
r_setup_features = value;
/* no implemented feature selection at this point */
break;
case PX4IO_P_SETUP_ARMING:
value &= PX4IO_P_SETUP_ARMING_VALID;
/*
* Update arming state - disarm if no longer OK.
* This builds on the requirement that the FMU driver
* asks about the FMU arming state on initialization,
* so that an in-air reset of FMU can not lead to a
* lockup of the IO arming state.
*/
if ((r_setup_arming & PX4IO_P_SETUP_ARMING_ARM_OK) && !(value & PX4IO_P_SETUP_ARMING_ARM_OK)) {
r_status_flags &= ~PX4IO_P_STATUS_FLAGS_ARMED;
}
r_setup_arming = value;
break;
case PX4IO_P_SETUP_PWM_RATES:
value &= PX4IO_P_SETUP_RATES_VALID;
pwm_configure_rates(value, r_setup_pwm_defaultrate, r_setup_pwm_altrate);
break;
case PX4IO_P_SETUP_PWM_DEFAULTRATE:
if (value < 50)
value = 50;
if (value > 400)
value = 400;
pwm_configure_rates(r_setup_pwm_rates, value, r_setup_pwm_altrate);
break;
case PX4IO_P_SETUP_PWM_ALTRATE:
if (value < 50)
value = 50;
if (value > 400)
value = 400;
pwm_configure_rates(r_setup_pwm_rates, r_setup_pwm_defaultrate, value);
break;
case PX4IO_P_SETUP_RELAYS:
value &= PX4IO_P_SETUP_RELAYS_VALID;
r_setup_relays = value;
POWER_RELAY1(value & (1 << 0) ? 1 : 0);
POWER_RELAY2(value & (1 << 1) ? 1 : 0);
POWER_ACC1(value & (1 << 2) ? 1 : 0);
POWER_ACC2(value & (1 << 3) ? 1 : 0);
break;
case PX4IO_P_SETUP_SET_DEBUG:
r_page_setup[PX4IO_P_SETUP_SET_DEBUG] = value;
isr_debug(0, "set debug %u\n", (unsigned)r_page_setup[PX4IO_P_SETUP_SET_DEBUG]);
break;
default:
return -1;
}
break;
case PX4IO_PAGE_RC_CONFIG: {
/* do not allow a RC config change while fully armed */
if (/* FMU is armed */ (r_setup_arming & PX4IO_P_SETUP_ARMING_ARM_OK) &&
/* IO is armed */ (r_status_flags & PX4IO_P_STATUS_FLAGS_ARMED)) {
break;
}
unsigned channel = offset / PX4IO_P_RC_CONFIG_STRIDE;
unsigned index = offset - channel * PX4IO_P_RC_CONFIG_STRIDE;
uint16_t *conf = &r_page_rc_input_config[channel * PX4IO_P_RC_CONFIG_STRIDE];
if (channel >= MAX_CONTROL_CHANNELS)
return -1;
/* disable the channel until we have a chance to sanity-check it */
conf[PX4IO_P_RC_CONFIG_OPTIONS] &= PX4IO_P_RC_CONFIG_OPTIONS_ENABLED;
switch (index) {
case PX4IO_P_RC_CONFIG_MIN:
case PX4IO_P_RC_CONFIG_CENTER:
case PX4IO_P_RC_CONFIG_MAX:
case PX4IO_P_RC_CONFIG_DEADZONE:
case PX4IO_P_RC_CONFIG_ASSIGNMENT:
conf[index] = value;
break;
case PX4IO_P_RC_CONFIG_OPTIONS:
value &= PX4IO_P_RC_CONFIG_OPTIONS_VALID;
r_status_flags |= PX4IO_P_STATUS_FLAGS_INIT_OK;
/* set all options except the enabled option */
conf[index] = value & ~PX4IO_P_RC_CONFIG_OPTIONS_ENABLED;
/* should the channel be enabled? */
/* this option is normally set last */
if (value & PX4IO_P_RC_CONFIG_OPTIONS_ENABLED) {
uint8_t count = 0;
/* assert min..center..max ordering */
if (conf[PX4IO_P_RC_CONFIG_MIN] < 500) {
count++;
}
if (conf[PX4IO_P_RC_CONFIG_MAX] > 2500) {
count++;
}
if (conf[PX4IO_P_RC_CONFIG_CENTER] < conf[PX4IO_P_RC_CONFIG_MIN]) {
count++;
}
if (conf[PX4IO_P_RC_CONFIG_CENTER] > conf[PX4IO_P_RC_CONFIG_MAX]) {
count++;
}
/* assert deadzone is sane */
if (conf[PX4IO_P_RC_CONFIG_DEADZONE] > 500) {
count++;
}
// The following check isn't needed as constraint checks in controls.c will catch this.
//if (conf[PX4IO_P_RC_CONFIG_MIN] > (conf[PX4IO_P_RC_CONFIG_CENTER] - conf[PX4IO_P_RC_CONFIG_DEADZONE])) {
// count++;
//}
//if (conf[PX4IO_P_RC_CONFIG_MAX] < (conf[PX4IO_P_RC_CONFIG_CENTER] + conf[PX4IO_P_RC_CONFIG_DEADZONE])) {
// count++;
//}
if (conf[PX4IO_P_RC_CONFIG_ASSIGNMENT] >= MAX_CONTROL_CHANNELS) {
count++;
}
/* sanity checks pass, enable channel */
if (count) {
isr_debug(0, "ERROR: %d config error(s) for RC%d.\n", count, (channel + 1));
r_status_flags &= ~PX4IO_P_STATUS_FLAGS_INIT_OK;
} else {
conf[index] |= PX4IO_P_RC_CONFIG_OPTIONS_ENABLED;
}
}
break;
/* inner switch: case PX4IO_P_RC_CONFIG_OPTIONS */
}
break;
/* case PX4IO_RC_PAGE_CONFIG */
}
default:
return -1;
}
return 0;
}
void
mixer_handle_text(const void *buffer, size_t length)
{
/* do not allow a mixer change while outputs armed */
if ((r_status_flags & PX4IO_P_STATUS_FLAGS_OUTPUTS_ARMED)) {
return;
}
px4io_mixdata *msg = (px4io_mixdata *)buffer;
isr_debug(2, "mix txt %u", length);
if (length < sizeof(px4io_mixdata))
return;
unsigned text_length = length - sizeof(px4io_mixdata);
switch (msg->action) {
case F2I_MIXER_ACTION_RESET:
isr_debug(2, "reset");
/* FIRST mark the mixer as invalid */
r_status_flags &= ~PX4IO_P_STATUS_FLAGS_MIXER_OK;
/* THEN actually delete it */
mixer_group.reset();
mixer_text_length = 0;
/* FALLTHROUGH */
case F2I_MIXER_ACTION_APPEND:
isr_debug(2, "append %d", length);
/* check for overflow - this would be really fatal */
if ((mixer_text_length + text_length + 1) > sizeof(mixer_text)) {
r_status_flags &= ~PX4IO_P_STATUS_FLAGS_MIXER_OK;
return;
}
/* append mixer text and nul-terminate */
memcpy(&mixer_text[mixer_text_length], msg->text, text_length);
mixer_text_length += text_length;
mixer_text[mixer_text_length] = '\0';
isr_debug(2, "buflen %u", mixer_text_length);
/* process the text buffer, adding new mixers as their descriptions can be parsed */
unsigned resid = mixer_text_length;
mixer_group.load_from_buf(&mixer_text[0], resid);
/* if anything was parsed */
if (resid != mixer_text_length) {
/* only set mixer ok if no residual is left over */
if (resid == 0) {
r_status_flags |= PX4IO_P_STATUS_FLAGS_MIXER_OK;
} else {
/* not yet reached the end of the mixer, set as not ok */
r_status_flags &= ~PX4IO_P_STATUS_FLAGS_MIXER_OK;
}
isr_debug(2, "used %u", mixer_text_length - resid);
/* copy any leftover text to the base of the buffer for re-use */
if (resid > 0)
memcpy(&mixer_text[0], &mixer_text[mixer_text_length - resid], resid);
mixer_text_length = resid;
/* update failsafe values */
mixer_set_failsafe();
}
break;
}
}
void
mixer_tick(void)
{
/* check that we are receiving fresh data from the FMU */
if (hrt_elapsed_time(&system_state.fmu_data_received_time) > FMU_INPUT_DROP_LIMIT_US) {
/* too long without FMU input, time to go to failsafe */
if (r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK) {
isr_debug(1, "AP RX timeout");
}
r_status_flags &= ~(PX4IO_P_STATUS_FLAGS_FMU_OK);
r_status_alarms |= PX4IO_P_STATUS_ALARMS_FMU_LOST;
} else {
r_status_flags |= PX4IO_P_STATUS_FLAGS_FMU_OK;
}
/* default to failsafe mixing */
source = MIX_FAILSAFE;
/*
* Decide which set of controls we're using.
*/
/* do not mix if RAW_PWM mode is on and FMU is good */
if ((r_status_flags & PX4IO_P_STATUS_FLAGS_RAW_PWM) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK)) {
/* don't actually mix anything - we already have raw PWM values */
source = MIX_NONE;
} else {
if (!(r_status_flags & PX4IO_P_STATUS_FLAGS_OVERRIDE) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK)) {
/* mix from FMU controls */
source = MIX_FMU;
}
if ( (r_status_flags & PX4IO_P_STATUS_FLAGS_OVERRIDE) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_RC_OK) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK) &&
!(r_setup_arming & PX4IO_P_SETUP_ARMING_RC_HANDLING_DISABLED)) {
/* if allowed, mix from RC inputs directly */
source = MIX_OVERRIDE;
}
}
/*
* Set failsafe status flag depending on mixing source
*/
if (source == MIX_FAILSAFE) {
r_status_flags |= PX4IO_P_STATUS_FLAGS_FAILSAFE;
} else {
r_status_flags &= ~(PX4IO_P_STATUS_FLAGS_FAILSAFE);
}
/*
* Run the mixers.
*/
if (source == MIX_FAILSAFE) {
/* copy failsafe values to the servo outputs */
for (unsigned i = 0; i < PX4IO_SERVO_COUNT; i++) {
r_page_servos[i] = r_page_servo_failsafe[i];
/* safe actuators for FMU feedback */
r_page_actuators[i] = (r_page_servos[i] - 1500) / 600.0f;
}
} else if (source != MIX_NONE) {
float outputs[PX4IO_SERVO_COUNT];
unsigned mixed;
uint16_t ramp_promille;
/* update esc init state, but only if we are truely armed and not just PWM enabled */
if (mixer_servos_armed && should_arm) {
switch (esc_state) {
/* after arming, some ESCs need an initalization period, count the time from here */
case ESC_OFF:
esc_init_time = hrt_absolute_time();
esc_state = ESC_INIT;
break;
/* after waiting long enough for the ESC initialization, we can start with the ramp to start the ESCs */
case ESC_INIT:
if (hrt_elapsed_time(&esc_init_time) > ESC_INIT_TIME_US) {
esc_state = ESC_RAMP;
}
break;
/* then ramp until the min speed is reached */
case ESC_RAMP:
if (hrt_elapsed_time(&esc_init_time) > (ESC_INIT_TIME_US + ESC_RAMP_TIME_US)) {
esc_state = ESC_ON;
}
break;
case ESC_ON:
default:
break;
}
} else {
esc_state = ESC_OFF;
}
/* do the calculations during the ramp for all at once */
if(esc_state == ESC_RAMP) {
ramp_promille = (1000*(hrt_elapsed_time(&esc_init_time)-ESC_INIT_TIME_US))/ESC_RAMP_TIME_US;
}
/* mix */
mixed = mixer_group.mix(&outputs[0], PX4IO_SERVO_COUNT);
/* scale to PWM and update the servo outputs as required */
for (unsigned i = 0; i < mixed; i++) {
/* save actuator values for FMU readback */
r_page_actuators[i] = FLOAT_TO_REG(outputs[i]);
switch (esc_state) {
case ESC_INIT:
r_page_servos[i] = (outputs[i] * 600 + 1500);
break;
case ESC_RAMP:
r_page_servos[i] = (outputs[i]
* (ramp_promille*r_page_servo_control_max[i] + (1000-ramp_promille)*2100 - ramp_promille*r_page_servo_control_min[i] - (1000-ramp_promille)*900)/2/1000
+ (ramp_promille*r_page_servo_control_max[i] + (1000-ramp_promille)*2100 + ramp_promille*r_page_servo_control_min[i] + (1000-ramp_promille)*900)/2/1000);
break;
case ESC_ON:
r_page_servos[i] = (outputs[i]
* (r_page_servo_control_max[i] - r_page_servo_control_min[i])/2
+ (r_page_servo_control_max[i] + r_page_servo_control_min[i])/2);
break;
case ESC_OFF:
default:
break;
}
}
for (unsigned i = mixed; i < PX4IO_SERVO_COUNT; i++)
r_page_servos[i] = 0;
}
/*
* Decide whether the servos should be armed right now.
*
* We must be armed, and we must have a PWM source; either raw from
* FMU or from the mixer.
*
* XXX correct behaviour for failsafe may require an additional case
* here.
*/
should_arm = (
/* IO initialised without error */ (r_status_flags & PX4IO_P_STATUS_FLAGS_INIT_OK)
/* and IO is armed */ && (r_status_flags & PX4IO_P_STATUS_FLAGS_SAFETY_OFF)
/* and FMU is armed */ && (
((r_setup_arming & PX4IO_P_SETUP_ARMING_FMU_ARMED)
/* and there is valid input via or mixer */ && (r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK) )
/* or direct PWM is set */ || (r_status_flags & PX4IO_P_STATUS_FLAGS_RAW_PWM)
/* or failsafe was set manually */ || (r_setup_arming & PX4IO_P_SETUP_ARMING_FAILSAFE_CUSTOM)
)
);
should_always_enable_pwm = (r_setup_arming & PX4IO_P_SETUP_ARMING_ALWAYS_PWM_ENABLE)
&& (r_status_flags & PX4IO_P_STATUS_FLAGS_INIT_OK)
&& (r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK);
if ((should_arm || should_always_enable_pwm) && !mixer_servos_armed) {
/* need to arm, but not armed */
up_pwm_servo_arm(true);
mixer_servos_armed = true;
r_status_flags |= PX4IO_P_STATUS_FLAGS_OUTPUTS_ARMED;
isr_debug(5, "> PWM enabled");
} else if ((!should_arm && !should_always_enable_pwm) && mixer_servos_armed) {
/* armed but need to disarm */
up_pwm_servo_arm(false);
mixer_servos_armed = false;
r_status_flags &= ~(PX4IO_P_STATUS_FLAGS_OUTPUTS_ARMED);
isr_debug(5, "> PWM disabled");
}
if (mixer_servos_armed && should_arm) {
/* update the servo outputs. */
for (unsigned i = 0; i < PX4IO_SERVO_COUNT; i++)
up_pwm_servo_set(i, r_page_servos[i]);
} else if (mixer_servos_armed && should_always_enable_pwm) {
/* set the idle servo outputs. */
for (unsigned i = 0; i < PX4IO_SERVO_COUNT; i++)
up_pwm_servo_set(i, r_page_servo_idle[i]);
}
}
void
mixer_handle_text(const void *buffer, size_t length)
{
/* do not allow a mixer change while fully armed */
if (/* FMU is armed */ (r_setup_arming & PX4IO_P_SETUP_ARMING_FMU_ARMED) &&
/* IO is armed */ (r_status_flags & PX4IO_P_STATUS_FLAGS_ARMED)) {
return;
}
px4io_mixdata *msg = (px4io_mixdata *)buffer;
isr_debug(2, "mix txt %u", length);
if (length < sizeof(px4io_mixdata))
return;
unsigned text_length = length - sizeof(px4io_mixdata);
switch (msg->action) {
case F2I_MIXER_ACTION_RESET:
isr_debug(2, "reset");
/* FIRST mark the mixer as invalid */
r_status_flags &= ~PX4IO_P_STATUS_FLAGS_MIXER_OK;
/* THEN actually delete it */
mixer_group.reset();
mixer_text_length = 0;
/* FALLTHROUGH */
case F2I_MIXER_ACTION_APPEND:
isr_debug(2, "append %d", length);
/* check for overflow - this is really fatal */
/* XXX could add just what will fit & try to parse, then repeat... */
if ((mixer_text_length + text_length + 1) > sizeof(mixer_text)) {
r_status_flags &= ~PX4IO_P_STATUS_FLAGS_MIXER_OK;
return;
}
/* append mixer text and nul-terminate */
memcpy(&mixer_text[mixer_text_length], msg->text, text_length);
mixer_text_length += text_length;
mixer_text[mixer_text_length] = '\0';
isr_debug(2, "buflen %u", mixer_text_length);
/* process the text buffer, adding new mixers as their descriptions can be parsed */
unsigned resid = mixer_text_length;
mixer_group.load_from_buf(&mixer_text[0], resid);
/* if anything was parsed */
if (resid != mixer_text_length) {
/* ideally, this should test resid == 0 ? */
r_status_flags |= PX4IO_P_STATUS_FLAGS_MIXER_OK;
isr_debug(2, "used %u", mixer_text_length - resid);
/* copy any leftover text to the base of the buffer for re-use */
if (resid > 0)
memcpy(&mixer_text[0], &mixer_text[mixer_text_length - resid], resid);
mixer_text_length = resid;
}
break;
}
}
void
mixer_tick(void)
{
/* check that we are receiving fresh data from the FMU */
if ((system_state.fmu_data_received_time == 0) ||
hrt_elapsed_time(&system_state.fmu_data_received_time) > FMU_INPUT_DROP_LIMIT_US) {
/* too long without FMU input, time to go to failsafe */
if (r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK) {
isr_debug(1, "AP RX timeout");
}
r_status_flags &= ~(PX4IO_P_STATUS_FLAGS_FMU_OK);
r_status_alarms |= PX4IO_P_STATUS_ALARMS_FMU_LOST;
} else {
r_status_flags |= PX4IO_P_STATUS_FLAGS_FMU_OK;
/* this flag is never cleared once OK */
r_status_flags |= PX4IO_P_STATUS_FLAGS_FMU_INITIALIZED;
}
/* default to failsafe mixing - it will be forced below if flag is set */
source = MIX_FAILSAFE;
/*
* Decide which set of controls we're using.
*/
/* do not mix if RAW_PWM mode is on and FMU is good */
if ((r_status_flags & PX4IO_P_STATUS_FLAGS_RAW_PWM) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK)) {
/* don't actually mix anything - we already have raw PWM values */
source = MIX_NONE;
} else {
if (!(r_status_flags & PX4IO_P_STATUS_FLAGS_OVERRIDE) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK)) {
/* mix from FMU controls */
source = MIX_FMU;
}
if ( (r_status_flags & PX4IO_P_STATUS_FLAGS_OVERRIDE) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_RC_OK) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK) &&
!(r_setup_arming & PX4IO_P_SETUP_ARMING_RC_HANDLING_DISABLED) &&
!(r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK) &&
/* do not enter manual override if we asked for termination failsafe and FMU is lost */
!(r_setup_arming & PX4IO_P_SETUP_ARMING_TERMINATION_FAILSAFE)) {
/* if allowed, mix from RC inputs directly */
source = MIX_OVERRIDE;
} else if ( (r_status_flags & PX4IO_P_STATUS_FLAGS_OVERRIDE) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_RC_OK) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK) &&
!(r_setup_arming & PX4IO_P_SETUP_ARMING_RC_HANDLING_DISABLED) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK)) {
/* if allowed, mix from RC inputs directly up to available rc channels */
source = MIX_OVERRIDE_FMU_OK;
}
}
/*
* Decide whether the servos should be armed right now.
*
* We must be armed, and we must have a PWM source; either raw from
* FMU or from the mixer.
*
*/
should_arm = (
/* IO initialised without error */ (r_status_flags & PX4IO_P_STATUS_FLAGS_INIT_OK)
/* and IO is armed */ && (r_status_flags & PX4IO_P_STATUS_FLAGS_SAFETY_OFF)
/* and FMU is armed */ && (
((r_setup_arming & PX4IO_P_SETUP_ARMING_FMU_ARMED)
/* and there is valid input via or mixer */ && (r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK) )
/* or direct PWM is set */ || (r_status_flags & PX4IO_P_STATUS_FLAGS_RAW_PWM)
/* or failsafe was set manually */ || ((r_setup_arming & PX4IO_P_SETUP_ARMING_FAILSAFE_CUSTOM) && !(r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK))
)
);
should_always_enable_pwm = (r_setup_arming & PX4IO_P_SETUP_ARMING_ALWAYS_PWM_ENABLE)
&& (r_status_flags & PX4IO_P_STATUS_FLAGS_INIT_OK)
&& (r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK);
/*
* Check if failsafe termination is set - if yes,
* set the force failsafe flag once entering the first
* failsafe condition.
*/
if ( /* if we have requested flight termination style failsafe (noreturn) */
(r_setup_arming & PX4IO_P_SETUP_ARMING_TERMINATION_FAILSAFE) &&
/* and we ended up in a failsafe condition */
(source == MIX_FAILSAFE) &&
/* and we should be armed, so we intended to provide outputs */
should_arm &&
/* and FMU is initialized */
(r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_INITIALIZED)) {
r_setup_arming |= PX4IO_P_SETUP_ARMING_FORCE_FAILSAFE;
}
/*
* Check if we should force failsafe - and do it if we have to
*/
if (r_setup_arming & PX4IO_P_SETUP_ARMING_FORCE_FAILSAFE) {
source = MIX_FAILSAFE;
}
/*
* Set failsafe status flag depending on mixing source
*/
if (source == MIX_FAILSAFE) {
r_status_flags |= PX4IO_P_STATUS_FLAGS_FAILSAFE;
} else {
r_status_flags &= ~(PX4IO_P_STATUS_FLAGS_FAILSAFE);
}
/*
* Run the mixers.
*/
if (source == MIX_FAILSAFE) {
/* copy failsafe values to the servo outputs */
for (unsigned i = 0; i < PX4IO_SERVO_COUNT; i++) {
r_page_servos[i] = r_page_servo_failsafe[i];
/* safe actuators for FMU feedback */
r_page_actuators[i] = FLOAT_TO_REG((r_page_servos[i] - 1500) / 600.0f);
}
} else if (source != MIX_NONE && (r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK)) {
float outputs[PX4IO_SERVO_COUNT];
unsigned mixed;
/* mix */
/* poor mans mutex */
in_mixer = true;
mixed = mixer_group.mix(&outputs[0], PX4IO_SERVO_COUNT, &r_mixer_limits);
in_mixer = false;
/* the pwm limit call takes care of out of band errors */
pwm_limit_calc(should_arm, mixed, r_setup_pwm_reverse, r_page_servo_disarmed, r_page_servo_control_min, r_page_servo_control_max, outputs, r_page_servos, &pwm_limit);
for (unsigned i = mixed; i < PX4IO_SERVO_COUNT; i++)
r_page_servos[i] = 0;
for (unsigned i = 0; i < PX4IO_SERVO_COUNT; i++) {
r_page_actuators[i] = FLOAT_TO_REG(outputs[i]);
}
}
/* set arming */
bool needs_to_arm = (should_arm || should_always_enable_pwm);
/* check any conditions that prevent arming */
if (r_setup_arming & PX4IO_P_SETUP_ARMING_LOCKDOWN) {
needs_to_arm = false;
}
if (!should_arm && !should_always_enable_pwm) {
needs_to_arm = false;
}
if (needs_to_arm && !mixer_servos_armed) {
/* need to arm, but not armed */
up_pwm_servo_arm(true);
mixer_servos_armed = true;
r_status_flags |= PX4IO_P_STATUS_FLAGS_OUTPUTS_ARMED;
isr_debug(5, "> PWM enabled");
} else if (!needs_to_arm && mixer_servos_armed) {
/* armed but need to disarm */
up_pwm_servo_arm(false);
mixer_servos_armed = false;
r_status_flags &= ~(PX4IO_P_STATUS_FLAGS_OUTPUTS_ARMED);
isr_debug(5, "> PWM disabled");
}
if (mixer_servos_armed && should_arm) {
/* update the servo outputs. */
for (unsigned i = 0; i < PX4IO_SERVO_COUNT; i++) {
up_pwm_servo_set(i, r_page_servos[i]);
}
/* set S.BUS1 or S.BUS2 outputs */
if (r_setup_features & PX4IO_P_SETUP_FEATURES_SBUS2_OUT) {
sbus2_output(r_page_servos, PX4IO_SERVO_COUNT);
} else if (r_setup_features & PX4IO_P_SETUP_FEATURES_SBUS1_OUT) {
sbus1_output(r_page_servos, PX4IO_SERVO_COUNT);
}
} else if (mixer_servos_armed && should_always_enable_pwm) {
/* set the disarmed servo outputs. */
for (unsigned i = 0; i < PX4IO_SERVO_COUNT; i++)
up_pwm_servo_set(i, r_page_servo_disarmed[i]);
/* set S.BUS1 or S.BUS2 outputs */
if (r_setup_features & PX4IO_P_SETUP_FEATURES_SBUS1_OUT)
sbus1_output(r_page_servos, PX4IO_SERVO_COUNT);
if (r_setup_features & PX4IO_P_SETUP_FEATURES_SBUS2_OUT)
sbus2_output(r_page_servos, PX4IO_SERVO_COUNT);
}
}
void
mixer_tick(void)
{
/* check that we are receiving fresh data from the FMU */
if (hrt_elapsed_time(&system_state.fmu_data_received_time) > FMU_INPUT_DROP_LIMIT_US) {
/* too long without FMU input, time to go to failsafe */
if (r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK) {
isr_debug(1, "AP RX timeout");
}
r_status_flags &= ~(PX4IO_P_STATUS_FLAGS_FMU_OK | PX4IO_P_STATUS_FLAGS_RAW_PWM);
r_status_alarms |= PX4IO_P_STATUS_ALARMS_FMU_LOST;
} else {
r_status_flags |= PX4IO_P_STATUS_FLAGS_FMU_OK;
}
/* default to failsafe mixing */
source = MIX_FAILSAFE;
/*
* Decide which set of controls we're using.
*/
/* do not mix if mixer is invalid or if RAW_PWM mode is on and FMU is good */
if ((r_status_flags & PX4IO_P_STATUS_FLAGS_RAW_PWM) &&
!(r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK)) {
/* don't actually mix anything - we already have raw PWM values or
not a valid mixer. */
source = MIX_NONE;
} else {
if (!(r_status_flags & PX4IO_P_STATUS_FLAGS_OVERRIDE) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK)) {
/* mix from FMU controls */
source = MIX_FMU;
}
if ( (r_status_flags & PX4IO_P_STATUS_FLAGS_OVERRIDE) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_RC_OK) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK)) {
/* if allowed, mix from RC inputs directly */
source = MIX_OVERRIDE;
}
}
/*
* Set failsafe status flag depending on mixing source
*/
if (source == MIX_FAILSAFE) {
r_status_flags |= PX4IO_P_STATUS_FLAGS_FAILSAFE;
} else {
r_status_flags &= ~(PX4IO_P_STATUS_FLAGS_FAILSAFE);
}
/*
* Run the mixers.
*/
if (source == MIX_FAILSAFE) {
/* copy failsafe values to the servo outputs */
for (unsigned i = 0; i < IO_SERVO_COUNT; i++) {
r_page_servos[i] = r_page_servo_failsafe[i];
/* safe actuators for FMU feedback */
r_page_actuators[i] = (r_page_servos[i] - 1500) / 600.0f;
}
} else if (source != MIX_NONE) {
float outputs[IO_SERVO_COUNT];
unsigned mixed;
/* mix */
mixed = mixer_group.mix(&outputs[0], IO_SERVO_COUNT);
/* scale to PWM and update the servo outputs as required */
for (unsigned i = 0; i < mixed; i++) {
/* save actuator values for FMU readback */
r_page_actuators[i] = FLOAT_TO_REG(outputs[i]);
/* scale to servo output */
r_page_servos[i] = (outputs[i] * 600.0f) + 1500;
}
for (unsigned i = mixed; i < IO_SERVO_COUNT; i++)
r_page_servos[i] = 0;
}
/*
* Decide whether the servos should be armed right now.
*
* We must be armed, and we must have a PWM source; either raw from
* FMU or from the mixer.
*
* XXX correct behaviour for failsafe may require an additional case
* here.
*/
bool should_arm = (
/* FMU is armed */ (r_setup_arming & PX4IO_P_SETUP_ARMING_FMU_ARMED) &&
/* IO is armed */ (r_status_flags & PX4IO_P_STATUS_FLAGS_ARMED) &&
/* there is valid input via direct PWM or mixer */ (r_status_flags & (PX4IO_P_STATUS_FLAGS_RAW_PWM | PX4IO_P_STATUS_FLAGS_MIXER_OK)) &&
/* IO initialised without error */ (r_status_flags & PX4IO_P_STATUS_FLAGS_INIT_OK) &&
/* FMU is available or FMU is not available but override is an option */
((r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK) || (!(r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK) && (r_setup_arming & PX4IO_P_SETUP_ARMING_MANUAL_OVERRIDE_OK) ))
);
if (should_arm && !mixer_servos_armed) {
/* need to arm, but not armed */
up_pwm_servo_arm(true);
mixer_servos_armed = true;
} else if (!should_arm && mixer_servos_armed) {
/* armed but need to disarm */
up_pwm_servo_arm(false);
mixer_servos_armed = false;
}
if (mixer_servos_armed) {
/* update the servo outputs. */
for (unsigned i = 0; i < IO_SERVO_COUNT; i++)
up_pwm_servo_set(i, r_page_servos[i]);
}
}
int
user_start(int argc, char *argv[])
{
/* configure the first 8 PWM outputs (i.e. all of them) */
up_pwm_servo_init(0xff);
#if defined(CONFIG_HAVE_CXX) && defined(CONFIG_HAVE_CXXINITIALIZE)
/* run C++ ctors before we go any further */
up_cxxinitialize();
# if defined(CONFIG_EXAMPLES_NSH_CXXINITIALIZE)
# error CONFIG_EXAMPLES_NSH_CXXINITIALIZE Must not be defined! Use CONFIG_HAVE_CXX and CONFIG_HAVE_CXXINITIALIZE.
# endif
#else
# error platform is dependent on c++ both CONFIG_HAVE_CXX and CONFIG_HAVE_CXXINITIALIZE must be defined.
#endif
/* reset all to zero */
memset(&system_state, 0, sizeof(system_state));
/* configure the high-resolution time/callout interface */
hrt_init();
/* calculate our fw CRC so FMU can decide if we need to update */
calculate_fw_crc();
/*
* Poll at 1ms intervals for received bytes that have not triggered
* a DMA event.
*/
#ifdef CONFIG_ARCH_DMA
hrt_call_every(&serial_dma_call, 1000, 1000, (hrt_callout)stm32_serial_dma_poll, NULL);
#endif
/* print some startup info */
syslog(LOG_INFO, "\nPX4IO: starting\n");
/* default all the LEDs to off while we start */
LED_AMBER(false);
LED_BLUE(false);
LED_SAFETY(false);
#ifdef GPIO_LED4
LED_RING(false);
#endif
/* turn on servo power (if supported) */
#ifdef POWER_SERVO
POWER_SERVO(true);
#endif
/* turn off S.Bus out (if supported) */
#ifdef ENABLE_SBUS_OUT
ENABLE_SBUS_OUT(false);
#endif
/* start the safety switch handler */
safety_init();
/* initialise the control inputs */
controls_init();
/* set up the ADC */
adc_init();
/* start the FMU interface */
interface_init();
/* add a performance counter for mixing */
perf_counter_t mixer_perf = perf_alloc(PC_ELAPSED, "mix");
/* add a performance counter for controls */
perf_counter_t controls_perf = perf_alloc(PC_ELAPSED, "controls");
/* and one for measuring the loop rate */
perf_counter_t loop_perf = perf_alloc(PC_INTERVAL, "loop");
struct mallinfo minfo = mallinfo();
r_page_status[PX4IO_P_STATUS_FREEMEM] = minfo.mxordblk;
syslog(LOG_INFO, "MEM: free %u, largest %u\n", minfo.mxordblk, minfo.fordblks);
/* initialize PWM limit lib */
pwm_limit_init(&pwm_limit);
/*
* P O L I C E L I G H T S
*
* Not enough memory, lock down.
*
* We might need to allocate mixers later, and this will
* ensure that a developer doing a change will notice
* that he just burned the remaining RAM with static
* allocations. We don't want him to be able to
* get past that point. This needs to be clearly
* documented in the dev guide.
*
*/
if (minfo.mxordblk < 600) {
syslog(LOG_ERR, "ERR: not enough MEM");
bool phase = false;
while (true) {
if (phase) {
LED_AMBER(true);
LED_BLUE(false);
} else {
LED_AMBER(false);
LED_BLUE(true);
}
up_udelay(250000);
phase = !phase;
}
}
/* Start the failsafe led init */
failsafe_led_init();
/*
* Run everything in a tight loop.
*/
uint64_t last_debug_time = 0;
uint64_t last_heartbeat_time = 0;
uint64_t last_loop_time = 0;
for (;;) {
dt = (hrt_absolute_time() - last_loop_time) / 1000000.0f;
last_loop_time = hrt_absolute_time();
if (dt < 0.0001f) {
dt = 0.0001f;
} else if (dt > 0.02f) {
dt = 0.02f;
}
/* track the rate at which the loop is running */
perf_count(loop_perf);
/* kick the mixer */
perf_begin(mixer_perf);
mixer_tick();
perf_end(mixer_perf);
/* kick the control inputs */
perf_begin(controls_perf);
controls_tick();
perf_end(controls_perf);
/* some boards such as Pixhawk 2.1 made
the unfortunate choice to combine the blue led channel with
the IMU heater. We need a software hack to fix the hardware hack
by allowing to disable the LED / heater.
*/
if (r_page_setup[PX4IO_P_SETUP_THERMAL] == PX4IO_THERMAL_IGNORE) {
/*
blink blue LED at 4Hz in normal operation. When in
override blink 4x faster so the user can clearly see
that override is happening. This helps when
pre-flight testing the override system
*/
uint32_t heartbeat_period_us = 250 * 1000UL;
if (r_status_flags & PX4IO_P_STATUS_FLAGS_OVERRIDE) {
heartbeat_period_us /= 4;
}
if ((hrt_absolute_time() - last_heartbeat_time) > heartbeat_period_us) {
last_heartbeat_time = hrt_absolute_time();
heartbeat_blink();
}
} else if (r_page_setup[PX4IO_P_SETUP_THERMAL] < PX4IO_THERMAL_FULL) {
/* switch resistive heater off */
LED_BLUE(false);
} else {
/* switch resistive heater hard on */
LED_BLUE(true);
}
update_mem_usage();
ring_blink();
check_reboot();
/* check for debug activity (default: none) */
show_debug_messages();
/* post debug state at ~1Hz - this is via an auxiliary serial port
* DEFAULTS TO OFF!
*/
if (hrt_absolute_time() - last_debug_time > (1000 * 1000)) {
isr_debug(1, "d:%u s=0x%x a=0x%x f=0x%x m=%u",
(unsigned)r_page_setup[PX4IO_P_SETUP_SET_DEBUG],
(unsigned)r_status_flags,
(unsigned)r_setup_arming,
(unsigned)r_setup_features,
(unsigned)mallinfo().mxordblk);
last_debug_time = hrt_absolute_time();
}
}
}
int
mixer_handle_text(const void *buffer, size_t length)
{
/* do not allow a mixer change while safety off and FMU armed */
if ((r_status_flags & PX4IO_P_STATUS_FLAGS_SAFETY_OFF) &&
(r_setup_arming & PX4IO_P_SETUP_ARMING_FMU_ARMED)) {
return 1;
}
/* disable mixing, will be enabled once load is complete */
PX4_ATOMIC_MODIFY_CLEAR(r_status_flags, PX4IO_P_STATUS_FLAGS_MIXER_OK);
/* abort if we're in the mixer - the caller is expected to retry */
if (in_mixer) {
return 1;
}
px4io_mixdata *msg = (px4io_mixdata *)buffer;
isr_debug(2, "mix txt %u", length);
if (length < sizeof(px4io_mixdata)) {
return 0;
}
unsigned text_length = length - sizeof(px4io_mixdata);
switch (msg->action) {
case F2I_MIXER_ACTION_RESET:
isr_debug(2, "reset");
/* THEN actually delete it */
mixer_group.reset();
mixer_text_length = 0;
/* FALLTHROUGH */
case F2I_MIXER_ACTION_APPEND:
isr_debug(2, "append %d", length);
/* check for overflow - this would be really fatal */
if ((mixer_text_length + text_length + 1) > sizeof(mixer_text)) {
PX4_ATOMIC_MODIFY_CLEAR(r_status_flags, PX4IO_P_STATUS_FLAGS_MIXER_OK);
return 0;
}
/* check if the last item has been processed - bail out if not */
if (mixer_update_pending) {
return 1;
}
/* append mixer text and nul-terminate, guard against overflow */
memcpy(&mixer_text[mixer_text_length], msg->text, text_length);
mixer_text_length += text_length;
mixer_text[mixer_text_length] = '\0';
isr_debug(2, "buflen %u", mixer_text_length);
/* flag the buffer as ready */
mixer_update_pending = true;
break;
}
return 0;
}
void register_interrupt_handler(uint8_t interrupt_number, isr_t handler) {
isr_debug("Register: [%d, %p]\n",
interrupt_number, (uint32_t) handler);
interrupt_handlers[interrupt_number] = handler;
}
void
mixer_tick(void)
{
/* check that we are receiving fresh data from the FMU */
if (hrt_elapsed_time(&system_state.fmu_data_received_time) > FMU_INPUT_DROP_LIMIT_US) {
/* too long without FMU input, time to go to failsafe */
if (r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK) {
isr_debug(1, "AP RX timeout");
}
r_status_flags &= ~(PX4IO_P_STATUS_FLAGS_FMU_OK);
r_status_alarms |= PX4IO_P_STATUS_ALARMS_FMU_LOST;
} else {
r_status_flags |= PX4IO_P_STATUS_FLAGS_FMU_OK;
}
/* default to failsafe mixing */
source = MIX_FAILSAFE;
/*
* Decide which set of controls we're using.
*/
/* do not mix if RAW_PWM mode is on and FMU is good */
if ((r_status_flags & PX4IO_P_STATUS_FLAGS_RAW_PWM) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK)) {
/* don't actually mix anything - we already have raw PWM values */
source = MIX_NONE;
} else {
if (!(r_status_flags & PX4IO_P_STATUS_FLAGS_OVERRIDE) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK)) {
/* mix from FMU controls */
source = MIX_FMU;
}
if ( (r_status_flags & PX4IO_P_STATUS_FLAGS_OVERRIDE) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_RC_OK) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK) &&
!(r_setup_arming & PX4IO_P_SETUP_ARMING_RC_HANDLING_DISABLED) &&
!(r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK)) {
/* if allowed, mix from RC inputs directly */
source = MIX_OVERRIDE;
} else if ( (r_status_flags & PX4IO_P_STATUS_FLAGS_OVERRIDE) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_RC_OK) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK) &&
!(r_setup_arming & PX4IO_P_SETUP_ARMING_RC_HANDLING_DISABLED) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK)) {
/* if allowed, mix from RC inputs directly up to available rc channels */
source = MIX_OVERRIDE_FMU_OK;
}
}
/*
* Set failsafe status flag depending on mixing source
*/
if (source == MIX_FAILSAFE) {
r_status_flags |= PX4IO_P_STATUS_FLAGS_FAILSAFE;
} else {
r_status_flags &= ~(PX4IO_P_STATUS_FLAGS_FAILSAFE);
}
/*
* Decide whether the servos should be armed right now.
*
* We must be armed, and we must have a PWM source; either raw from
* FMU or from the mixer.
*
* XXX correct behaviour for failsafe may require an additional case
* here.
*/
should_arm = (
/* IO initialised without error */ (r_status_flags & PX4IO_P_STATUS_FLAGS_INIT_OK)
/* and IO is armed */ && (r_status_flags & PX4IO_P_STATUS_FLAGS_SAFETY_OFF)
/* and FMU is armed */ && (
((r_setup_arming & PX4IO_P_SETUP_ARMING_FMU_ARMED)
/* and there is valid input via or mixer */ && (r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK) )
/* or direct PWM is set */ || (r_status_flags & PX4IO_P_STATUS_FLAGS_RAW_PWM)
/* or failsafe was set manually */ || (r_setup_arming & PX4IO_P_SETUP_ARMING_FAILSAFE_CUSTOM)
)
);
should_always_enable_pwm = (r_setup_arming & PX4IO_P_SETUP_ARMING_ALWAYS_PWM_ENABLE)
&& (r_status_flags & PX4IO_P_STATUS_FLAGS_INIT_OK)
&& (r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK);
/*
* Run the mixers.
*/
if (source == MIX_FAILSAFE) {
/* copy failsafe values to the servo outputs */
for (unsigned i = 0; i < PX4IO_SERVO_COUNT; i++) {
r_page_servos[i] = r_page_servo_failsafe[i];
/* safe actuators for FMU feedback */
r_page_actuators[i] = FLOAT_TO_REG((r_page_servos[i] - 1500) / 600.0f);
}
} else if (source != MIX_NONE && (r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK)) {
float outputs[PX4IO_SERVO_COUNT];
unsigned mixed;
/* mix */
/* poor mans mutex */
in_mixer = true;
mixed = mixer_group.mix(&outputs[0], PX4IO_SERVO_COUNT);
in_mixer = false;
pwm_limit_calc(should_arm, mixed, r_page_servo_disarmed, r_page_servo_control_min, r_page_servo_control_max, outputs, r_page_servos, &pwm_limit);
for (unsigned i = mixed; i < PX4IO_SERVO_COUNT; i++)
r_page_servos[i] = 0;
for (unsigned i = 0; i < PX4IO_SERVO_COUNT; i++) {
r_page_actuators[i] = FLOAT_TO_REG(outputs[i]);
}
}
if ((should_arm || should_always_enable_pwm) && !mixer_servos_armed) {
/* need to arm, but not armed */
up_pwm_servo_arm(true);
mixer_servos_armed = true;
r_status_flags |= PX4IO_P_STATUS_FLAGS_OUTPUTS_ARMED;
isr_debug(5, "> PWM enabled");
} else if ((!should_arm && !should_always_enable_pwm) && mixer_servos_armed) {
/* armed but need to disarm */
up_pwm_servo_arm(false);
mixer_servos_armed = false;
r_status_flags &= ~(PX4IO_P_STATUS_FLAGS_OUTPUTS_ARMED);
isr_debug(5, "> PWM disabled");
}
if (mixer_servos_armed && should_arm) {
/* update the servo outputs. */
for (unsigned i = 0; i < PX4IO_SERVO_COUNT; i++)
up_pwm_servo_set(i, r_page_servos[i]);
} else if (mixer_servos_armed && should_always_enable_pwm) {
/* set the disarmed servo outputs. */
for (unsigned i = 0; i < PX4IO_SERVO_COUNT; i++)
up_pwm_servo_set(i, r_page_servo_disarmed[i]);
}
}
void
mixer_tick(void)
{
/* check that we are receiving fresh data from the FMU */
if ((system_state.fmu_data_received_time == 0) ||
hrt_elapsed_time(&system_state.fmu_data_received_time) > FMU_INPUT_DROP_LIMIT_US) {
/* too long without FMU input, time to go to failsafe */
if (r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK) {
isr_debug(1, "AP RX timeout");
}
r_status_flags &= ~(PX4IO_P_STATUS_FLAGS_FMU_OK);
r_status_alarms |= PX4IO_P_STATUS_ALARMS_FMU_LOST;
} else {
r_status_flags |= PX4IO_P_STATUS_FLAGS_FMU_OK;
/* this flag is never cleared once OK */
r_status_flags |= PX4IO_P_STATUS_FLAGS_FMU_INITIALIZED;
}
/* default to failsafe mixing - it will be forced below if flag is set */
source = MIX_FAILSAFE;
/*
* Decide which set of controls we're using.
*/
/* Do not mix if we have raw PWM and FMU is ok. */
if ((r_status_flags & PX4IO_P_STATUS_FLAGS_RAW_PWM) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK)) {
if ((r_status_flags & PX4IO_P_STATUS_FLAGS_OVERRIDE) > 0) {
/* a channel based override has been
* triggered, with FMU active */
source = MIX_OVERRIDE_FMU_OK;
} else {
/* don't actually mix anything - copy values from r_page_direct_pwm */
source = MIX_NONE;
memcpy(r_page_servos, r_page_direct_pwm, sizeof(uint16_t)*PX4IO_SERVO_COUNT);
}
} else {
if (!(r_status_flags & PX4IO_P_STATUS_FLAGS_OVERRIDE) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK) &&
(r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK)) {
/* mix from FMU controls */
source = MIX_FMU;
}
else if (r_status_flags & PX4IO_P_STATUS_FLAGS_OVERRIDE) {
if (r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK) {
/* if allowed, mix from RC inputs directly up to available rc channels */
source = MIX_OVERRIDE_FMU_OK;
} else {
/* if allowed, mix from RC inputs directly */
source = MIX_OVERRIDE;
}
}
}
/*
* Decide whether the servos should be armed right now.
*
* We must be armed, and we must have a PWM source; either raw from
* FMU or from the mixer.
*
*/
should_arm = (
/* IO initialised without error */ (r_status_flags & PX4IO_P_STATUS_FLAGS_INIT_OK)
/* and IO is armed */ && (r_status_flags & PX4IO_P_STATUS_FLAGS_SAFETY_OFF)
/* and FMU is armed */ && (
((r_setup_arming & PX4IO_P_SETUP_ARMING_FMU_ARMED)
/* and there is valid input via or mixer */ && (r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK))
/* or direct PWM is set */ || (r_status_flags & PX4IO_P_STATUS_FLAGS_RAW_PWM)
/* or failsafe was set manually */ || ((r_setup_arming & PX4IO_P_SETUP_ARMING_FAILSAFE_CUSTOM)
&& !(r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK))
)
);
should_arm_nothrottle = (
/* IO initialised without error */ (r_status_flags & PX4IO_P_STATUS_FLAGS_INIT_OK)
/* and IO is armed */ && (r_status_flags & PX4IO_P_STATUS_FLAGS_SAFETY_OFF)
/* and there is valid input via or mixer */ && (r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK));
should_always_enable_pwm = (r_setup_arming & PX4IO_P_SETUP_ARMING_ALWAYS_PWM_ENABLE)
&& (r_status_flags & PX4IO_P_STATUS_FLAGS_INIT_OK)
&& (r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_OK);
/*
* Check if failsafe termination is set - if yes,
* set the force failsafe flag once entering the first
* failsafe condition.
*/
if ( /* if we have requested flight termination style failsafe (noreturn) */
(r_setup_arming & PX4IO_P_SETUP_ARMING_TERMINATION_FAILSAFE) &&
/* and we ended up in a failsafe condition */
(source == MIX_FAILSAFE) &&
/* and we should be armed, so we intended to provide outputs */
should_arm &&
/* and FMU is initialized */
(r_status_flags & PX4IO_P_STATUS_FLAGS_FMU_INITIALIZED)) {
r_setup_arming |= PX4IO_P_SETUP_ARMING_FORCE_FAILSAFE;
}
/*
* Check if we should force failsafe - and do it if we have to
*/
if (r_setup_arming & PX4IO_P_SETUP_ARMING_FORCE_FAILSAFE) {
source = MIX_FAILSAFE;
}
/*
* Set failsafe status flag depending on mixing source
*/
if (source == MIX_FAILSAFE) {
r_status_flags |= PX4IO_P_STATUS_FLAGS_FAILSAFE;
} else {
r_status_flags &= ~(PX4IO_P_STATUS_FLAGS_FAILSAFE);
}
/*
* Set simple mixer trim values
* (there should be a "dirty" flag to indicate that r_page_servo_control_trim has changed)
*/
mixer_group.set_trims(r_page_servo_control_trim, PX4IO_SERVO_COUNT);
/*
* Run the mixers.
*/
if (source == MIX_FAILSAFE) {
/* copy failsafe values to the servo outputs */
for (unsigned i = 0; i < PX4IO_SERVO_COUNT; i++) {
r_page_servos[i] = r_page_servo_failsafe[i];
/* safe actuators for FMU feedback */
r_page_actuators[i] = FLOAT_TO_REG((r_page_servos[i] - 1500) / 600.0f);
}
} else if (source != MIX_NONE && (r_status_flags & PX4IO_P_STATUS_FLAGS_MIXER_OK)
&& !(r_setup_arming & PX4IO_P_SETUP_ARMING_LOCKDOWN)) {
float outputs[PX4IO_SERVO_COUNT];
unsigned mixed;
if (REG_TO_FLOAT(r_setup_slew_max) > FLT_EPSILON) {
// maximum value the ouputs of the multirotor mixer are allowed to change in this cycle
// factor 2 is needed because actuator ouputs are in the range [-1,1]
float delta_out_max = 2.0f * 1000.0f * dt / (r_page_servo_control_max[0] - r_page_servo_control_min[0]) / REG_TO_FLOAT(
r_setup_slew_max);
mixer_group.set_max_delta_out_once(delta_out_max);
}
/* mix */
/* update parameter for mc thrust model if it updated */
if (update_mc_thrust_param) {
mixer_group.set_thrust_factor(REG_TO_FLOAT(r_setup_thr_fac));
update_mc_thrust_param = false;
}
/* mix */
mixed = mixer_mix_threadsafe(&outputs[0], &r_mixer_limits);
/* the pwm limit call takes care of out of band errors */
pwm_limit_calc(should_arm, should_arm_nothrottle, mixed, r_setup_pwm_reverse, r_page_servo_disarmed,
r_page_servo_control_min, r_page_servo_control_max, outputs, r_page_servos, &pwm_limit);
/* clamp unused outputs to zero */
for (unsigned i = mixed; i < PX4IO_SERVO_COUNT; i++) {
r_page_servos[i] = 0;
outputs[i] = 0.0f;
}
/* store normalized outputs */
for (unsigned i = 0; i < PX4IO_SERVO_COUNT; i++) {
r_page_actuators[i] = FLOAT_TO_REG(outputs[i]);
}
}
/* set arming */
bool needs_to_arm = (should_arm || should_arm_nothrottle || should_always_enable_pwm);
/* lockdown means to send a valid pulse which disables the outputs */
if (r_setup_arming & PX4IO_P_SETUP_ARMING_LOCKDOWN) {
needs_to_arm = true;
}
if (needs_to_arm && !mixer_servos_armed) {
/* need to arm, but not armed */
up_pwm_servo_arm(true);
mixer_servos_armed = true;
r_status_flags |= PX4IO_P_STATUS_FLAGS_OUTPUTS_ARMED;
isr_debug(5, "> PWM enabled");
} else if (!needs_to_arm && mixer_servos_armed) {
/* armed but need to disarm */
up_pwm_servo_arm(false);
mixer_servos_armed = false;
r_status_flags &= ~(PX4IO_P_STATUS_FLAGS_OUTPUTS_ARMED);
isr_debug(5, "> PWM disabled");
}
if (mixer_servos_armed && (should_arm || should_arm_nothrottle)
&& !(r_setup_arming & PX4IO_P_SETUP_ARMING_LOCKDOWN)) {
/* update the servo outputs. */
for (unsigned i = 0; i < PX4IO_SERVO_COUNT; i++) {
up_pwm_servo_set(i, r_page_servos[i]);
}
/* set S.BUS1 or S.BUS2 outputs */
if (r_setup_features & PX4IO_P_SETUP_FEATURES_SBUS2_OUT) {
sbus2_output(_sbus_fd, r_page_servos, PX4IO_SERVO_COUNT);
} else if (r_setup_features & PX4IO_P_SETUP_FEATURES_SBUS1_OUT) {
sbus1_output(_sbus_fd, r_page_servos, PX4IO_SERVO_COUNT);
}
} else if (mixer_servos_armed && (should_always_enable_pwm
|| (r_setup_arming & PX4IO_P_SETUP_ARMING_LOCKDOWN))) {
/* set the disarmed servo outputs. */
for (unsigned i = 0; i < PX4IO_SERVO_COUNT; i++) {
up_pwm_servo_set(i, r_page_servo_disarmed[i]);
/* copy values into reporting register */
r_page_servos[i] = r_page_servo_disarmed[i];
}
/* set S.BUS1 or S.BUS2 outputs */
if (r_setup_features & PX4IO_P_SETUP_FEATURES_SBUS1_OUT) {
sbus1_output(_sbus_fd, r_page_servo_disarmed, PX4IO_SERVO_COUNT);
}
if (r_setup_features & PX4IO_P_SETUP_FEATURES_SBUS2_OUT) {
sbus2_output(_sbus_fd, r_page_servo_disarmed, PX4IO_SERVO_COUNT);
}
}
}
int
user_start(int argc, char *argv[])
{
/* run C++ ctors before we go any further */
up_cxxinitialize();
/* reset all to zero */
memset(&system_state, 0, sizeof(system_state));
/* configure the high-resolution time/callout interface */
hrt_init();
/*
* Poll at 1ms intervals for received bytes that have not triggered
* a DMA event.
*/
#ifdef CONFIG_ARCH_DMA
hrt_call_every(&serial_dma_call, 1000, 1000, (hrt_callout)stm32_serial_dma_poll, NULL);
#endif
/* print some startup info */
lowsyslog("\nPX4IO: starting\n");
/* default all the LEDs to off while we start */
LED_AMBER(false);
LED_BLUE(false);
LED_SAFETY(false);
/* turn on servo power */
POWER_SERVO(true);
/* start the safety switch handler */
safety_init();
/* configure the first 8 PWM outputs (i.e. all of them) */
up_pwm_servo_init(0xff);
/* initialise the control inputs */
controls_init();
#ifdef CONFIG_STM32_I2C1
/* start the i2c handler */
i2c_init();
#endif
/* add a performance counter for mixing */
perf_counter_t mixer_perf = perf_alloc(PC_ELAPSED, "mix");
/* add a performance counter for controls */
perf_counter_t controls_perf = perf_alloc(PC_ELAPSED, "controls");
/* and one for measuring the loop rate */
perf_counter_t loop_perf = perf_alloc(PC_INTERVAL, "loop");
struct mallinfo minfo = mallinfo();
lowsyslog("MEM: free %u, largest %u\n", minfo.mxordblk, minfo.fordblks);
#if 0
/* not enough memory, lock down */
if (minfo.mxordblk < 500) {
lowsyslog("ERR: not enough MEM");
bool phase = false;
if (phase) {
LED_AMBER(true);
LED_BLUE(false);
} else {
LED_AMBER(false);
LED_BLUE(true);
}
phase = !phase;
usleep(300000);
}
#endif
/*
* Run everything in a tight loop.
*/
uint64_t last_debug_time = 0;
for (;;) {
/* track the rate at which the loop is running */
perf_count(loop_perf);
/* kick the mixer */
perf_begin(mixer_perf);
mixer_tick();
perf_end(mixer_perf);
/* kick the control inputs */
perf_begin(controls_perf);
controls_tick();
perf_end(controls_perf);
/* check for debug activity */
show_debug_messages();
/* post debug state at ~1Hz */
if (hrt_absolute_time() - last_debug_time > (1000 * 1000)) {
struct mallinfo minfo = mallinfo();
isr_debug(1, "d:%u s=0x%x a=0x%x f=0x%x r=%u m=%u",
(unsigned)r_page_setup[PX4IO_P_SETUP_SET_DEBUG],
(unsigned)r_status_flags,
(unsigned)r_setup_arming,
(unsigned)r_setup_features,
(unsigned)i2c_loop_resets,
(unsigned)minfo.mxordblk);
last_debug_time = hrt_absolute_time();
}
}
}
int
mixer_handle_text(const void *buffer, size_t length)
{
/* do not allow a mixer change while safety off and FMU armed */
if ((r_status_flags & PX4IO_P_STATUS_FLAGS_SAFETY_OFF) &&
(r_setup_arming & PX4IO_P_SETUP_ARMING_FMU_ARMED)) {
return 1;
}
/* disable mixing, will be enabled once load is complete */
r_status_flags &= ~(PX4IO_P_STATUS_FLAGS_MIXER_OK);
/* abort if we're in the mixer - the caller is expected to retry */
if (in_mixer) {
return 1;
}
px4io_mixdata *msg = (px4io_mixdata *)buffer;
isr_debug(2, "mix txt %u", length);
if (length < sizeof(px4io_mixdata)) {
return 0;
}
unsigned text_length = length - sizeof(px4io_mixdata);
switch (msg->action) {
case F2I_MIXER_ACTION_RESET:
isr_debug(2, "reset");
/* THEN actually delete it */
mixer_group.reset();
mixer_text_length = 0;
/* FALLTHROUGH */
case F2I_MIXER_ACTION_APPEND:
isr_debug(2, "append %d", length);
/* check for overflow - this would be really fatal */
if ((mixer_text_length + text_length + 1) > sizeof(mixer_text)) {
r_status_flags &= ~PX4IO_P_STATUS_FLAGS_MIXER_OK;
return 0;
}
/* append mixer text and nul-terminate, guard against overflow */
memcpy(&mixer_text[mixer_text_length], msg->text, text_length);
mixer_text_length += text_length;
mixer_text[mixer_text_length] = '\0';
isr_debug(2, "buflen %u", mixer_text_length);
/* process the text buffer, adding new mixers as their descriptions can be parsed */
unsigned resid = mixer_text_length;
mixer_group.load_from_buf(&mixer_text[0], resid);
/* if anything was parsed */
if (resid != mixer_text_length) {
isr_debug(2, "used %u", mixer_text_length - resid);
/* copy any leftover text to the base of the buffer for re-use */
if (resid > 0) {
memmove(&mixer_text[0], &mixer_text[mixer_text_length - resid], resid);
/* enforce null termination */
mixer_text[resid] = '\0';
}
mixer_text_length = resid;
}
break;
}
return 0;
}
static int
registers_set_one(uint8_t page, uint8_t offset, uint16_t value)
{
switch (page) {
case PX4IO_PAGE_STATUS:
switch (offset) {
case PX4IO_P_STATUS_ALARMS:
/* clear bits being written */
r_status_alarms &= ~value;
break;
case PX4IO_P_STATUS_FLAGS:
/*
* Allow FMU override of arming state (to allow in-air restores),
* but only if the arming state is not in sync on the IO side.
*/
if (!(r_status_flags & PX4IO_P_STATUS_FLAGS_ARM_SYNC)) {
r_status_flags = value;
}
break;
default:
/* just ignore writes to other registers in this page */
break;
}
break;
case PX4IO_PAGE_SETUP:
switch (offset) {
case PX4IO_P_SETUP_FEATURES:
value &= PX4IO_P_SETUP_FEATURES_VALID;
r_setup_features = value;
/* no implemented feature selection at this point */
break;
case PX4IO_P_SETUP_ARMING:
value &= PX4IO_P_SETUP_ARMING_VALID;
/*
* Update arming state - disarm if no longer OK.
* This builds on the requirement that the FMU driver
* asks about the FMU arming state on initialization,
* so that an in-air reset of FMU can not lead to a
* lockup of the IO arming state.
*/
// XXX do not reset IO's safety state by FMU for now
// if ((r_setup_arming & PX4IO_P_SETUP_ARMING_FMU_ARMED) && !(value & PX4IO_P_SETUP_ARMING_FMU_ARMED)) {
// r_status_flags &= ~PX4IO_P_STATUS_FLAGS_ARMED;
// }
if (value & PX4IO_P_SETUP_ARMING_RC_HANDLING_DISABLED) {
r_status_flags |= PX4IO_P_STATUS_FLAGS_INIT_OK;
}
r_setup_arming = value;
break;
case PX4IO_P_SETUP_PWM_RATES:
value &= PX4IO_P_SETUP_RATES_VALID;
pwm_configure_rates(value, r_setup_pwm_defaultrate, r_setup_pwm_altrate);
break;
case PX4IO_P_SETUP_PWM_DEFAULTRATE:
if (value < 50)
value = 50;
if (value > 400)
value = 400;
pwm_configure_rates(r_setup_pwm_rates, value, r_setup_pwm_altrate);
break;
case PX4IO_P_SETUP_PWM_ALTRATE:
if (value < 50)
value = 50;
if (value > 400)
value = 400;
pwm_configure_rates(r_setup_pwm_rates, r_setup_pwm_defaultrate, value);
break;
#ifdef CONFIG_ARCH_BOARD_PX4IO_V1
case PX4IO_P_SETUP_RELAYS:
value &= PX4IO_P_SETUP_RELAYS_VALID;
r_setup_relays = value;
POWER_RELAY1((value & PX4IO_P_SETUP_RELAYS_POWER1) ? 1 : 0);
POWER_RELAY2((value & PX4IO_P_SETUP_RELAYS_POWER2) ? 1 : 0);
POWER_ACC1((value & PX4IO_P_SETUP_RELAYS_ACC1) ? 1 : 0);
POWER_ACC2((value & PX4IO_P_SETUP_RELAYS_ACC2) ? 1 : 0);
break;
#endif
case PX4IO_P_SETUP_VBATT_SCALE:
r_page_setup[PX4IO_P_SETUP_VBATT_SCALE] = value;
break;
case PX4IO_P_SETUP_SET_DEBUG:
r_page_setup[PX4IO_P_SETUP_SET_DEBUG] = value;
isr_debug(0, "set debug %u\n", (unsigned)r_page_setup[PX4IO_P_SETUP_SET_DEBUG]);
break;
case PX4IO_P_SETUP_DSM:
dsm_bind(value & 0x0f, (value >> 4) & 7);
break;
default:
return -1;
}
break;
case PX4IO_PAGE_RC_CONFIG: {
/**
* do not allow a RC config change while outputs armed
*/
if ((r_status_flags & PX4IO_P_STATUS_FLAGS_SAFETY_OFF) ||
(r_status_flags & PX4IO_P_STATUS_FLAGS_OVERRIDE) ||
(r_setup_arming & PX4IO_P_SETUP_ARMING_FMU_ARMED)) {
break;
}
unsigned channel = offset / PX4IO_P_RC_CONFIG_STRIDE;
unsigned index = offset - channel * PX4IO_P_RC_CONFIG_STRIDE;
uint16_t *conf = &r_page_rc_input_config[channel * PX4IO_P_RC_CONFIG_STRIDE];
if (channel >= PX4IO_CONTROL_CHANNELS)
return -1;
/* disable the channel until we have a chance to sanity-check it */
conf[PX4IO_P_RC_CONFIG_OPTIONS] &= PX4IO_P_RC_CONFIG_OPTIONS_ENABLED;
switch (index) {
case PX4IO_P_RC_CONFIG_MIN:
case PX4IO_P_RC_CONFIG_CENTER:
case PX4IO_P_RC_CONFIG_MAX:
case PX4IO_P_RC_CONFIG_DEADZONE:
case PX4IO_P_RC_CONFIG_ASSIGNMENT:
conf[index] = value;
break;
case PX4IO_P_RC_CONFIG_OPTIONS:
value &= PX4IO_P_RC_CONFIG_OPTIONS_VALID;
r_status_flags |= PX4IO_P_STATUS_FLAGS_INIT_OK;
/* clear any existing RC disabled flag */
r_setup_arming &= ~(PX4IO_P_SETUP_ARMING_RC_HANDLING_DISABLED);
/* set all options except the enabled option */
conf[index] = value & ~PX4IO_P_RC_CONFIG_OPTIONS_ENABLED;
/* should the channel be enabled? */
/* this option is normally set last */
if (value & PX4IO_P_RC_CONFIG_OPTIONS_ENABLED) {
uint8_t count = 0;
/* assert min..center..max ordering */
if (conf[PX4IO_P_RC_CONFIG_MIN] < 500) {
count++;
}
if (conf[PX4IO_P_RC_CONFIG_MAX] > 2500) {
count++;
}
if (conf[PX4IO_P_RC_CONFIG_CENTER] < conf[PX4IO_P_RC_CONFIG_MIN]) {
count++;
}
if (conf[PX4IO_P_RC_CONFIG_CENTER] > conf[PX4IO_P_RC_CONFIG_MAX]) {
count++;
}
/* assert deadzone is sane */
if (conf[PX4IO_P_RC_CONFIG_DEADZONE] > 500) {
count++;
}
if (conf[PX4IO_P_RC_CONFIG_ASSIGNMENT] >= PX4IO_CONTROL_CHANNELS) {
count++;
}
/* sanity checks pass, enable channel */
if (count) {
isr_debug(0, "ERROR: %d config error(s) for RC%d.\n", count, (channel + 1));
r_status_flags &= ~PX4IO_P_STATUS_FLAGS_INIT_OK;
} else {
conf[index] |= PX4IO_P_RC_CONFIG_OPTIONS_ENABLED;
}
}
break;
/* inner switch: case PX4IO_P_RC_CONFIG_OPTIONS */
}
break;
/* case PX4IO_RC_PAGE_CONFIG */
}
case PX4IO_PAGE_TEST:
switch (offset) {
case PX4IO_P_TEST_LED:
LED_AMBER(value & 1);
break;
}
break;
default:
return -1;
}
return 0;
}
