Hello everybody!
I have a problem with compilers for nRF51822. My problems: I create a pwm signal ~38Khz, duty 30% at pin 30 of nRF51822. This process is work well. I want use the function:
nrf_drv_gpiote_out_task_enable(pin)
nrf_drv_gpiote_out_task_disable(pin)
to Enable and Disable pwm signal to GPIO (pin 30). With Keil MDK is good (as the followd picture), but with gcc compiler is not good (as the second picture). I use SDK11, pwm_library example
Source code:
APP_PWM_INSTANCE(PWM1,1); // Create the instance "PWM1" using TIMER1.
static volatile bool ready_flag; // A flag indicating PWM status.
void pwm_ready_callback(uint32_t pwm_id) // PWM callback function
{
ready_flag = true;
}
#define enable_pwm_out(pin) nrf_drv_gpiote_out_task_enable(pin)
#define disable_pwm_out(pin) nrf_drv_gpiote_out_task_disable(pin)
int main(void)
{
ret_code_t err_code;
/*2 channels PWM, 38,4Khz - 26us, p30 and p8*/
app_pwm_config_t pwm1_cfg = APP_PWM_DEFAULT_CONFIG_2CH(26L, 30, 8);
/* Switch the polarity of the second channel. */
pwm1_cfg.pin_polarity[0] = APP_PWM_POLARITY_ACTIVE_HIGH;
pwm1_cfg.pin_polarity[1] = APP_PWM_POLARITY_ACTIVE_HIGH;
/* Initialize and enable PWM. */
err_code = app_pwm_init(&PWM1,&pwm1_cfg,pwm_ready_callback);
APP_ERROR_CHECK(err_code);
app_pwm_enable(&PWM1);
while(true)
{
disable_pwm_out(30);
while (app_pwm_channel_duty_set(&PWM1, 0, 30) == NRF_ERROR_BUSY);
//while (app_pwm_channel_duty_set(&PWM1, 1, 70) == NRF_ERROR_BUSY);
//Create timing
while(1){
enable_pwm_out(30);
nrf_delay_us(2400);
disable_pwm_out(30);
nrf_delay_us(600);
enable_pwm_out(30);
nrf_delay_us(1200);
disable_pwm_out(30);
nrf_delay_us(600);
enable_pwm_out(30);
nrf_delay_us(600);
disable_pwm_out(30);
nrf_delay_us(600);
}
}
}
Results with Keil MDK:
Results with ARM_GCC:
I do not understand why gcc_arm compiler is not good with my problems. Thanks for your watching!
