static void checkPx4RebootCommand(uint8_t b)
{
if (intermcu.stable_px4_baud == CHANGING_BAUD && sys_time_check_and_ack_timer(px4bl_tid)) {
//to prevent a short intermcu comm loss, give some time to changing the baud
sys_time_cancel_timer(px4bl_tid);
intermcu.stable_px4_baud = PPRZ_BAUD;
} else if (intermcu.stable_px4_baud == PX4_BAUD) {
if (sys_time_check_and_ack_timer(px4bl_tid)) {
//time out the possibility to reboot to the px4 bootloader, to prevent unwanted restarts during flight
sys_time_cancel_timer(px4bl_tid);
//for unknown reasons, 1500000 baud does not work reliably after prolonged times.
//I suspect a temperature related issue, combined with the fbw f1 crystal which is out of specs
//After a initial period on 1500000, revert to 230400
//We still start at 1500000 to remain compatible with original PX4 firmware. (which always runs at 1500000)
uart_periph_set_baudrate(intermcu.device->periph, B230400);
intermcu.stable_px4_baud = CHANGING_BAUD;
px4bl_tid = sys_time_register_timer(1.0, NULL);
return;
}
#ifdef SYS_TIME_LED
LED_ON(SYS_TIME_LED);
#endif
if (b == px4RebootSequence[px4RebootSequenceCount]) {
px4RebootSequenceCount++;
} else {
px4RebootSequenceCount = 0;
}
if (px4RebootSequenceCount >= 6) { // 6 = length of rebootSequence + 1
px4RebootSequenceCount = 0; // should not be necessary...
//send some magic back
//this is the same as the Pixhawk IO code would send
intermcu.device->put_byte(intermcu.device->periph, 0, 0x00);
intermcu.device->put_byte(intermcu.device->periph, 0, 0xe5);
intermcu.device->put_byte(intermcu.device->periph, 0, 0x32);
intermcu.device->put_byte(intermcu.device->periph, 0, 0x0a);
intermcu.device->put_byte(intermcu.device->periph, 0,
0x66); // dummy byte, seems to be necessary otherwise one byte is missing at the fmu side...
while (((struct uart_periph *)(intermcu.device->periph))->tx_running) {
// tx_running is volatile now, so LED_TOGGLE not necessary anymore
#ifdef SYS_TIME_LED
LED_TOGGLE(SYS_TIME_LED);
#endif
}
#ifdef SYS_TIME_LED
LED_OFF(SYS_TIME_LED);
#endif
scb_reset_system();
}
}
}
static void checkPx4RebootCommand(unsigned char b)
{
if (!px4RebootTimeout) {
if (sys_time_check_and_ack_timer(px4bl_tid)) {
//time out the possibility to reboot to the px4 bootloader, to prevent unwanted restarts during flight
px4RebootTimeout = true;
sys_time_cancel_timer(px4bl_tid);
return;
}
#ifdef SYS_TIME_LED
LED_ON(SYS_TIME_LED);
#endif
if (b == px4RebootSequence[px4RebootSequenceCount]) {
px4RebootSequenceCount++;
} else {
px4RebootSequenceCount = 0;
}
if (px4RebootSequenceCount >= 6) { // 6 = length of rebootSequence + 1
px4RebootSequenceCount = 0; // should not be necessary...
//send some magic back
//this is the same as the Pixhawk IO code would send
intermcu_device->put_byte(intermcu_device->periph, 0x00);
intermcu_device->put_byte(intermcu_device->periph, 0xe5);
intermcu_device->put_byte(intermcu_device->periph, 0x32);
intermcu_device->put_byte(intermcu_device->periph, 0x0a);
intermcu_device->put_byte(intermcu_device->periph,
0x66); // dummy byte, seems to be necessary otherwise one byte is missing at the fmu side...
while (((struct uart_periph *)(intermcu_device->periph))->tx_running) {
// tx_running is volatile now, so LED_TOGGLE not necessary anymore
#ifdef SYS_TIME_LED
LED_TOGGLE(SYS_TIME_LED);
#endif
}
#ifdef SYS_TIME_LED
LED_OFF(SYS_TIME_LED);
#endif
scb_reset_system();
}
}
}
void px4flash_event(void)
{
if (PX4IO_PORT->char_available(PX4IO_PORT->periph)) {
if (!setToBootloaderMode) {
//ignore anything coming from IO if not in bootloader mode (which should be nothing)
} else {
//relay everything from IO to the laptop
while (PX4IO_PORT->char_available(PX4IO_PORT->periph)) {
unsigned char b = PX4IO_PORT->get_byte(PX4IO_PORT->periph);
FLASH_PORT->put_byte(FLASH_PORT->periph, b);
}
}
}
//TODO: check if bootloader timeout was surpassed
if (FLASH_PORT->char_available(FLASH_PORT->periph) && !setToBootloaderMode) {
// TMP TEST
// while (FLASH_PORT->char_available(FLASH_PORT->periph)) {
// unsigned char bla = FLASH_PORT->get_byte(FLASH_PORT->periph);
// FLASH_PORT->put_byte(FLASH_PORT->periph,bla);
// }
// return;
//check whether this is flash related communication, and for who (ap/fbw)
int state = 0;
while (state < 4 && FLASH_PORT->char_available(FLASH_PORT->periph)) {
unsigned char b = FLASH_PORT->get_byte(FLASH_PORT->periph);
switch (state) {
case (0) :
if (b == 'p') { state++; } else { return; }
break;
case (1) :
if (b == 'p') { state++; } else { return; }
break;
case (2) :
if (b == 'r') { state++; } else { return; }
break;
case (3) :
if (b == 'z') { state++; } else { return; }
break;
default :
break;
}
}
if (state != 4) {return;}
//TODO: check if/how this interferes with flashing original PX4 firmware
unsigned char target = FLASH_PORT->get_byte(FLASH_PORT->periph);
if (target == '1') { //target ap
//the target is the ap, so reboot to PX4 bootloader
scb_reset_system();
} else { // target fbw
//the target is the fbw, so reboot the fbw and switch to relay mode
//first check if the bootloader has not timeout:
if (sys_time_check_and_ack_timer(px4iobl_tid) || px4ioRebootTimeout) {
px4ioRebootTimeout = TRUE;
sys_time_cancel_timer(px4iobl_tid);
FLASH_PORT->put_byte(FLASH_PORT->periph, 'T');
FLASH_PORT->put_byte(FLASH_PORT->periph, 'I');
FLASH_PORT->put_byte(FLASH_PORT->periph, 'M');
FLASH_PORT->put_byte(FLASH_PORT->periph, 'E');
FLASH_PORT->put_byte(FLASH_PORT->periph, 'O');
FLASH_PORT->put_byte(FLASH_PORT->periph, 'U');
FLASH_PORT->put_byte(FLASH_PORT->periph, 'T'); // use 7 chars as answer
return;
} { // FBW OK OK hollay hollay :)
FLASH_PORT->put_byte(FLASH_PORT->periph, 'F');
FLASH_PORT->put_byte(FLASH_PORT->periph, 'B');
FLASH_PORT->put_byte(FLASH_PORT->periph, 'W');
FLASH_PORT->put_byte(FLASH_PORT->periph, 'O');
FLASH_PORT->put_byte(FLASH_PORT->periph, 'K');
FLASH_PORT->put_byte(FLASH_PORT->periph, 'O');
FLASH_PORT->put_byte(FLASH_PORT->periph, 'K'); // use 7 chars as answer
}
//stop all intermcu communication:
disable_inter_comm(true);
/*
* The progdieshit define is very usefull, if for whatever reason the (normal, not bootloader) firmware on the IO chip became disfunct.
* In that case:
* 1. enable this define
* 2. build and upload the fmu f4 chip (ap target in pprz center)
* 3. build the io code, and convert the firmware using the following command:
* /home/houjebek/paparazzi/sw/tools/px4/px_mkfw.py --prototype "/home/houjebek/px4/Firmware/Images/px4io-v2.prototype" --image /home/houjebek/paparazzi/var/aircrafts/Iris/fbw/fbw.bin > /home/houjebek/paparazzi/var/aircrafts/Iris/fbw/fbw.px4
* 4. Start the following command:
* /home/houjebek/paparazzi/sw/tools/px4/px_uploader.py --port "/dev/ttyACM0" /home/houjebek/paparazzi/var/aircrafts/Iris/fbw/fbw.px4
* 5a. Either, boot the Pixhawk (reconnect usb) holding the IO reset button until the FMU led stops blinking fast (i.e. exits its own bootloader)
* 5b Or, press the IO reset button on the pixhawk
* 6. Watch the output of the command of step 4, it should recognize the IO bootloader and start flashing. If not try repeating step 5a.
* 7. Don forget to disable the define and upload the ap again :)
*/
// #define progdieshit
#ifndef progdieshit
//send the reboot to bootloader command:
static struct IOPacket dma_packet;
dma_packet.count_code = 0x40 + 0x01;
dma_packet.crc = 0;
dma_packet.page = PX4IO_PAGE_SETUP;
dma_packet.offset = PX4IO_P_SETUP_REBOOT_BL;
dma_packet.regs[0] = PX4IO_REBOOT_BL_MAGIC;
dma_packet.crc = crc_packet(&dma_packet);
struct IOPacket *pkt = &dma_packet;
uint8_t *p = (uint8_t *)pkt;
PX4IO_PORT->put_byte(PX4IO_PORT->periph, p[0]);
PX4IO_PORT->put_byte(PX4IO_PORT->periph, p[1]);
PX4IO_PORT->put_byte(PX4IO_PORT->periph, p[2]);
PX4IO_PORT->put_byte(PX4IO_PORT->periph, p[3]);
PX4IO_PORT->put_byte(PX4IO_PORT->periph, p[4]);
PX4IO_PORT->put_byte(PX4IO_PORT->periph, p[5]);
sys_time_usleep(5000); // this seems to be close to the minimum delay necessary to process this packet at the IO side
//the pixhawk IO chip should respond with:
// 0x00 ( PKT_CODE_SUCCESS )
// 0xe5
// 0x32
// 0x0a
//After that, the IO chips reboots into bootloader mode, in which it will stay for a short period
//The baudrate in bootloader mode ic changed to 115200 (normal operating baud is 1500000, at least for original pixhawk fmu firmware)
//state machine
state = 0;
while (state < 4 && PX4IO_PORT->char_available(PX4IO_PORT->periph)) {
unsigned char b = PX4IO_PORT->get_byte(PX4IO_PORT->periph);
switch (state) {
case (0) :
if (b == PKT_CODE_SUCCESS) { state++; } else { state = 0; }
break;
case (1) :
if (b == 0xe5) { state++; } else { state = 0; }
break;
case (2) :
if (b == 0x32) { state++; } else { state = 0; }
break;
case (3) :
if (b == 0x0a) { state++; } else { state = 0; }
break;
default :
break;
}
}
#else
int state = 4;
#endif
if (state == 4) {
uart_periph_set_baudrate(PX4IO_PORT->periph, B115200);
/* look for the bootloader for 150 ms */
int ret = 0;
for (int i = 0; i < 15 && !ret ; i++) {
sys_time_usleep(10000);
//send a get_sync command in order to keep the io in bootloader mode
PX4IO_PORT->put_byte(PX4IO_PORT->periph, PROTO_GET_SYNC);
PX4IO_PORT->put_byte(PX4IO_PORT->periph, PROTO_EOC);
//get_sync should be replied with, so check if that happens and
//all other bytes are discarded, hopefully those were not important
//(they may be caused by sending multiple syncs)
while (PX4IO_PORT->char_available(PX4IO_PORT->periph)) {
unsigned char b = PX4IO_PORT->get_byte(PX4IO_PORT->periph);
if (b == PROTO_INSYNC) {
setToBootloaderMode = true;
ret = 1;
break;
}
}
}
if (setToBootloaderMode) {
//if successfully entered bootloader mode, clear any remaining bytes (which may have a function, but I did not check)
while (PX4IO_PORT->char_available(PX4IO_PORT->periph)) {PX4IO_PORT->get_byte(PX4IO_PORT->periph);}
}
} else {
FLASH_PORT->put_byte(FLASH_PORT->periph, 'E'); //TODO: find out what the PX4 protocol for error feedback is...
FLASH_PORT->put_byte(FLASH_PORT->periph, 'R');
FLASH_PORT->put_byte(FLASH_PORT->periph, 'R');
FLASH_PORT->put_byte(FLASH_PORT->periph, 'O');
FLASH_PORT->put_byte(FLASH_PORT->periph, 'R');
FLASH_PORT->put_byte(FLASH_PORT->periph, '!');
FLASH_PORT->put_byte(FLASH_PORT->periph, ' '); // use 7 chars as answer
}
}
} else if (FLASH_PORT->char_available(FLASH_PORT->periph)) {
//already in bootloader mode, just directly relay data
while (FLASH_PORT->char_available(FLASH_PORT->periph)) {
unsigned char b = FLASH_PORT->get_byte(FLASH_PORT->periph);
PX4IO_PORT->put_byte(PX4IO_PORT->periph, b);
}
}
}
