/**
* Timer process to poll for new data from the MPU6000.
*/
void AP_InertialSensor_MPU6000::_poll_data(void)
{
if (hal.scheduler->in_timerprocess()) {
if (!_spi_sem->take_nonblocking()) {
/*
the semaphore being busy is an expected condition when the
mainline code is calling wait_for_sample() which will
grab the semaphore. We return now and rely on the mainline
code grabbing the latest sample.
*/
return;
}
if (_data_ready()) {
_last_sample_time_micros = hal.scheduler->micros();
_read_data_transaction();
}
_spi_sem->give();
} else {
/* Synchronous read - take semaphore */
if (_spi_sem->take(10)) {
if (_data_ready()) {
_last_sample_time_micros = hal.scheduler->micros();
_read_data_transaction();
}
_spi_sem->give();
} else {
hal.scheduler->panic(
PSTR("PANIC: AP_InertialSensor_MPU6000::_poll_data "
"failed to take SPI semaphore synchronously"));
}
}
}
uint16_t AP_InertialSensor_MPU6000::_init_sensor( Sample_rate sample_rate )
{
if (_initialised) return _mpu6000_product_id;
_initialised = true;
_spi = hal.spi->device(AP_HAL::SPIDevice_MPU6000);
_spi_sem = _spi->get_semaphore();
/* Pin 70 defined especially to hook
up PE6 to the hal.gpio abstraction.
(It is not a valid pin under Arduino.) */
_drdy_pin = hal.gpio->channel(70);
hal.scheduler->suspend_timer_procs();
uint8_t tries = 0;
do {
bool success = _hardware_init(sample_rate);
if (success) {
hal.scheduler->delay(5+2);
if (!_spi_sem->take(100)) {
hal.scheduler->panic(PSTR("MPU6000: Unable to get semaphore"));
}
if (_data_ready()) {
_spi_sem->give();
break;
} else {
hal.console->println_P(
PSTR("MPU6000 startup failed: no data ready"));
}
_spi_sem->give();
}
if (tries++ > 5) {
hal.scheduler->panic(PSTR("PANIC: failed to boot MPU6000 5 times"));
}
} while (1);
hal.scheduler->resume_timer_procs();
/* read the first lot of data.
* _read_data_transaction requires the spi semaphore to be taken by
* its caller. */
_last_sample_time_micros = hal.scheduler->micros();
hal.scheduler->delay(10);
if (_spi_sem->take(100)) {
_read_data_transaction();
_spi_sem->give();
}
// start the timer process to read samples
hal.scheduler->register_timer_process(AP_HAL_MEMBERPROC(&AP_InertialSensor_MPU6000::_poll_data));
#if MPU6000_DEBUG
_dump_registers();
#endif
return _mpu6000_product_id;
}
/**
* Timer process to poll for new data from the MPU6000.
*/
void AP_InertialSensor_MPU6000::_poll_data(void)
{
if (!_spi_sem->take_nonblocking()) {
return;
}
if (_data_ready()) {
_read_data_transaction();
}
_spi_sem->give();
}
/*
initialise the sensor
*/
bool AP_InertialSensor_MPU6000::_init_sensor(void)
{
_spi = hal.spi->device(AP_HAL::SPIDevice_MPU6000);
_spi_sem = _spi->get_semaphore();
#ifdef MPU6000_DRDY_PIN
_drdy_pin = hal.gpio->channel(MPU6000_DRDY_PIN);
_drdy_pin->mode(HAL_GPIO_INPUT);
#endif
hal.scheduler->suspend_timer_procs();
uint8_t tries = 0;
do {
bool success = _hardware_init();
if (success) {
hal.scheduler->delay(5+2);
if (!_spi_sem->take(100)) {
return false;
}
if (_data_ready()) {
_spi_sem->give();
break;
} else {
return false;
}
_spi_sem->give();
}
if (tries++ > 5) {
hal.console->print_P(PSTR("failed to boot MPU6000 5 times"));
return false;
}
} while (1);
// grab the used instances
_gyro_instance = _imu.register_gyro();
_accel_instance = _imu.register_accel();
hal.scheduler->resume_timer_procs();
// start the timer process to read samples
hal.scheduler->register_timer_process(AP_HAL_MEMBERPROC(&AP_InertialSensor_MPU6000::_poll_data));
#if MPU6000_DEBUG
_dump_registers();
#endif
return true;
}
/**
* Timer process to poll for new data from the MPU6000.
*/
void AP_InertialSensor_MPU6000::_poll_data(void)
{
if (_data_ready()) {
if (hal.scheduler->in_timerprocess()) {
_read_data_from_timerprocess();
} else {
/* Synchronous read - take semaphore */
bool got = _spi_sem->take(10);
if (got) {
_last_sample_time_micros = hal.scheduler->micros();
_read_data_transaction();
_spi_sem->give();
} else {
hal.scheduler->panic(
PSTR("PANIC: AP_InertialSensor_MPU6000::_poll_data "
"failed to take SPI semaphore synchronously"));
}
}
}
}
uint16_t AP_InertialSensor_L3GD20::_init_sensor( Sample_rate sample_rate )
{
if (_initialised) return _L3GD20_product_id;
_initialised = true;
_spi = hal.spi->device(AP_HAL::SPIDevice_L3GD20);
_spi_sem = _spi->get_semaphore();
#ifdef L3GD20_DRDY_PIN
_drdy_pin = hal.gpio->channel(L3GD20_DRDY_PIN);
_drdy_pin->mode(HAL_GPIO_INPUT);
#endif
hal.scheduler->suspend_timer_procs();
// Test WHOAMI
uint8_t whoami = _register_read(ADDR_WHO_AM_I);
if (whoami != WHO_I_AM) {
// TODO: we should probably accept multiple chip
// revisions. This is the one on the PXF
hal.console->printf("L3GD20: unexpected WHOAMI 0x%x\n", (unsigned)whoami);
hal.scheduler->panic(PSTR("L3GD20: bad WHOAMI"));
}
uint8_t tries = 0;
do {
bool success = _hardware_init(sample_rate);
if (success) {
hal.scheduler->delay(5+2);
if (!_spi_sem->take(100)) {
hal.scheduler->panic(PSTR("L3GD20: Unable to get semaphore"));
}
if (_data_ready()) {
_spi_sem->give();
break;
} else {
hal.console->println_P(
PSTR("L3GD20 startup failed: no data ready"));
}
_spi_sem->give();
}
if (tries++ > 5) {
hal.scheduler->panic(PSTR("PANIC: failed to boot L3GD20 5 times"));
}
} while (1);
hal.scheduler->resume_timer_procs();
/* read the first lot of data.
* _read_data_transaction requires the spi semaphore to be taken by
* its caller. */
_last_sample_time_micros = hal.scheduler->micros();
hal.scheduler->delay(10);
if (_spi_sem->take(100)) {
_read_data_transaction();
_spi_sem->give();
}
// start the timer process to read samples
hal.scheduler->register_timer_process(AP_HAL_MEMBERPROC(&AP_InertialSensor_L3GD20::_poll_data));
#if L3GD20_DEBUG
_dump_registers();
#endif
return _L3GD20_product_id;
}
uint16_t AP_InertialSensor_LSM9DS0::_init_sensor( AP_InertialSensor::Sample_rate sample_rate)
{
if (_initialised) return _lsm9ds0_product_id;
_initialised = true;
_spi = hal.spi->device(AP_HAL::SPIDevice_LSM9DS0_AM);
_spi_sem = _spi->get_semaphore();
_drdy_pin_a = hal.gpio->channel(BBB_P8_8);
_drdy_pin_m = hal.gpio->channel(BBB_P8_10);
_drdy_pin_g = hal.gpio->channel(BBB_P8_34);
// For some reason configuring the pins as an inputs make the driver fail
// _drdy_pin_a->mode(GPIO_IN);
// _drdy_pin_m->mode(GPIO_IN);
// _drdy_pin_g->mode(GPIO_IN);
hal.scheduler->suspend_timer_procs();
uint8_t tries = 0;
do {
bool success = _hardware_init(sample_rate);
if (success) {
hal.scheduler->delay(5+2);
if (!_spi_sem->take(100)) {
hal.scheduler->panic(PSTR("LSM9DS0: Unable to get semaphore"));
}
if (_data_ready()) {
_spi_sem->give();
break;
} else {
hal.console->println_P(
PSTR("LSM9DS0 startup failed: no data ready"));
}
_spi_sem->give();
}
if (tries++ > 5) {
hal.scheduler->panic(PSTR("PANIC: failed to boot LSM9DS0 5 times"));
}
} while (1);
hal.scheduler->resume_timer_procs();
/* read the first lot of data.
* _read_data_transaction requires the spi semaphore to be taken by
* its caller. */
_last_sample_time_micros = hal.scheduler->micros();
hal.scheduler->delay(10);
if (_spi_sem->take(100)) {
_read_data_transaction_g();
_read_data_transaction_xm();
_spi_sem->give();
}
// start the timer process to read samples
hal.scheduler->register_timer_process(AP_HAL_MEMBERPROC(&AP_InertialSensor_LSM9DS0::_poll_data));
#if LSM9DS0_DEBUG
_dump_registers();
#endif
return _lsm9ds0_product_id;
}
