Led blink using the PWM only works good the first time

[Kok]

Hello,

I have an Led that controls brightness through PWM, and a button that controls PWM working, but the PWM only works at begining.

#define LED_BLINK_TIMER_ID (0xC6)
#define LED_BLINK_PERIOD   (5000)

#define LED_W_ON() \
    do { \
        PWM_1_Stop(); \
        PWM_1_WritePeriod(5000); \
        PWM_1_WriteCompare(1000); \
        PWM_1_WriteCounter(0); \
        PWM_1_Enable(); \
    }while(0)
    
#define LED_W_OFF() \
    do { \
        PWM_1_Stop(); \
    }while(0)

void led_module_init(void)
{
    PWM_1_Start();
    PWM_1_Stop();
}
static void led_blink_handle(uint8_t port, timer_id_t id)
{
    (void)port;
    (void)id;
    
    timer_stop(0, LED_BLINK_TIMER_ID);
    LED_W_OFF();
}

void btn_press_detect(void)
{
    if (btn_get_press_short())
    {
        LED_W_ON();
        timer_start(0, LED_BLINK_TIMER_ID, LED_BLINK_PERIOD, led_blink_handle);
    }
}

void app_main_loop(void)
{
    btn_press_detect();
    //CyDelay(50);
}

When I first press the button, the led blinks for about 3 seconds and then goes off. When I press the button again, the led goes off, If I add CyDelay(50) to the app_main_loop function, it will always work.

Please help to see what is going on. In addition, serial port, I2C and other GPIO resources are used in the project. Looking forward to your reply!

[Kok]

The platform used is EZ-PD 5225 and the debugger is Miniprog4

[ShifangZ_26]

Hello Kok,

1. Could you please kindly disable deep sleep in the firmware and let CCG5 firmware do not enter deep sleep mode?

2. If you could like to register PWM status in deep sleep and let CCG5 firmware do not enter deep sleep mode if the PWM is working. Below API recommend you take a look. 

bool system_sleep(void) 

And, adding concerns flag of PWM in this function.

Best Regards,

Lisa

[Kok · Accepted solution]

Ok, this problem is really caused by system deep sleep. Your solution works good. Thank you!