SPI NSS for gyro and accelerometer being pulled low at the same time.

[jisang1213]

I've faced an issue with gyro and accelerometer CS pins being pulled low simultaneously, making the retrieved data contain garbage values once a while (about every 1~2 seconds). There needs to be a mechanism to prevent this like using while() to wait for its turn to read.

void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin) {
	if (GPIO_Pin == INT_ACC_Pin) {
                while(imu.readingGyr);
                BMI088_ReadAccelerometerDMA(&imu); 

	} else if (GPIO_Pin == INT_GYR_Pin) {
                while(imu.readingAcc);
                BMI088_ReadGyroscopeDMA(&imu);
	}
}

and in the BMI088.c file the imu.readingGyr and imu.readingAcc flags should be set before pulling the CS low (and unset after pulling CS to high) to prevent race condition.