Validate ADC sampling at 1 kHz

Question

Hi,

I am a new programmer to the NRF51 and I was wondering if someone would look at my code. I am trying to program the NRF51 to take ADC samples at a frequency of 1 kHz. My code also doesn't seem to produce any values when I run it on putty and the Board leds do not light up as expected which makes me believe something in my settings is wrong.

Thanks.

#include "RTE_Components.h"             // Component selection

#include <stdbool.h>
#include <stdint.h>
#include "nrf_adc.h"
#include "nrf.h"
#include "nrf_gpio.h"
#include "nordic_common.h"
#include "nrf_delay.h"
#include "app_error.h"
#include "app_timer.h"
#include "app_util_platform.h"
#include "boards.h"
#include "bsp.h"
#include "nrf_drv_adc.h"
#include "nrf_drv_config.h"

#define ADC_BUFFER_SIZE 								10    //ADC Buffer - useful for sending large datapackets
#define APP_TIMER_PRESCALER 						0     //Prescalar Value: 2^24 / (1+Prescalar)
#define APP_TIMER_MAX_TIMERS 						2
#define APP_TIMER_OP_QUEUE_SIZE         4     
#define ADC_SAMPLING_INTERVAL     APP_TIMER_TICKS(1, APP_TIMER_PRESCALER) //ADC Sampling at 1 ms

static nrf_adc_value_t       adc_buffer[ADC_BUFFER_SIZE]; /**< ADC buffer. */
static nrf_drv_adc_channel_t m_channel_config = NRF_DRV_ADC_DEFAULT_CHANNEL(NRF_ADC_CONFIG_INPUT_0);
	
static void adc_event_handler(nrf_drv_adc_evt_t const * p_event)  //Event Handler for ADC triggering
{
    if (p_event->type == NRF_DRV_ADC_EVT_DONE)
    {          
        uint32_t i;
        for (i = 0; i < p_event->data.done.size; i++)
        {
            NRF_LOG_PRINTF("Current sample value: %d\r\n", p_event->data.done.p_buffer[i]);
        }
    }
}

//Initialize ADC 
static void adc_init()
{
	ret_code_t ret_code;
	
	nrf_drv_adc_config_t config = NRF_DRV_ADC_DEFAULT_CONFIG;
	
	ret_code = nrf_drv_adc_init(&config, adc_event_handler);
	
	nrf_drv_adc_channel_enable(&m_channel_config);
}

//Initialize Timer
static void timer_init()
{
	
	APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_OP_QUEUE_SIZE, false);
	
}

//MAIN Function
int main(void)
{
		//Initialize the Application Timer Module
		timer_init();
		
		
		//Initialize ADC
		adc_init();
		
		//Sampling 
    while (true)
    {
			uint32_t i;
        for (i = 0; i < ADC_BUFFER_SIZE; i++)
        {
            // manually trigger ADC conversion
            nrf_drv_adc_sample();
            // enter into sleep mode
            __SEV();
            __WFE();
            __WFE();

            nrf_delay_ms(1);
            LEDS_INVERT(BSP_LED_0_MASK);
        }
    }
}