Analog COMP not working, but LDCOMP works fine.

Question

Hi there, 
 
 I'm working on nrf82382, try to use COMP function to monitor the voltage of AIN0(p0.02), but seems not working, no example for the COMP. and then I found the LDCOMP example in the SDK, and copy the some codes from that, and the LDCOMP is work fines. 
 here is my COMP codes: 
 void comp_event_handler(nrf_comp_event_t evt)
{
	if (evt == NRF_COMP_EVENT_READY) {
 LED1_Toggle();
	} else if (evt == NRF_COMP_EVENT_DOWN) {
 LED2_Toggle();
	} else if (evt == NRF_COMP_EVENT_UP) {
 LED3_Toggle();
	} else if (evt == NRF_COMP_EVENT_CROSS) {
 LED4_Toggle();
	}
}

static void lpcomp_event_handler(nrf_lpcomp_event_t event)
{
 if (event == NRF_LPCOMP_EVENT_CROSS) {
 LED2_Toggle();
 }
}


static void lpcomp_init(void)
{
 uint32_t err_code;

 nrf_drv_lpcomp_config_t config = NRF_DRV_LPCOMP_DEFAULT_CONFIG;
 config.input = NRF_LPCOMP_INPUT_0;
 // initialize LPCOMP driver, from this point LPCOMP will be active and provided
 // event handler will be executed when defined action is detected
 err_code = nrf_drv_lpcomp_init(&config, lpcomp_event_handler);
 
 nrf_drv_lpcomp_enable();
}

int main(void)
{
	LED_Init();
	KEY_Init();
	
	nrf_drv_comp_config_t comp_config = NRF_DRV_COMP_DEFAULT_CONFIG(NRF_COMP_INPUT_0);
	comp_config.isource = NRF_COMP_ISOURCE_Ien5uA;
	uint32_t err_code = nrf_drv_comp_init(&comp_config, comp_event_handler);
	if (err_code != NRFX_SUCCESS) {
 LED3_Close();
	}
	nrf_drv_comp_start(NRF_DRV_COMP_EVT_EN_CROSS_MASK, NRF_DRV_COMP_SHORT_STOP_AFTER_UP_EVT);
	
	while (1){
 nrf_drv_comp_sample(); // try to sample manually, but still not work.
 nrf_delay_ms(50); 
 
 if (KEY1_Down() == 0){ // use that logic to make sure MCU was not hung.
 LED1_Toggle();
 }
	}
} 
 
 please help, or is there any example for the COMP in nrf52832?