My NRF52811 Custome board not working as my application.

RE: My NRF52811 Custome board not working as my application.

mandha_amarr — Mon, 21 Oct 2019 11:42:29 GMT

Thank you jimmy Wong.

My problem is solved.

RE: My NRF52811 Custome board not working as my application.

mandha_amarr — Wed, 25 Sep 2019 12:04:34 GMT

Hi jimmy Wong,

Thank you for response, I downloaded that code which you given link and then i run it. It is running and giving Four channel

ADC data. Like below

ADC event number: 0
ADC Value 348
ADC Value 695
ADC Value 347
ADC Value 695
ADC event number: 1
ADC Value 348
ADC Value 696
ADC Value 348
ADC Value 695

But it is running once only after pressing reset button. it is not running continuously .

I want to read the ADC values continuously with some delay, Is it possible to do that in your suggested code.

Thank you.

RE: My NRF52811 Custome board not working as my application.

Jimmy Wong — Tue, 24 Sep 2019 14:12:10 GMT

HI,

YOu can refer to the example on https://github.com/NordicPlayground/nRF52-ADC-examples/tree/master/ble_app_uart__saadc_timer_driven__scan_mode.

RE: My NRF52811 Custome board not working as my application.

mandha_amarr — Tue, 24 Sep 2019 13:02:40 GMT

Hi jimmy,

Sorry for late replay. Present i am using PCA10040 Board for developing my application.

As per my application i want to use Four ADC Channels (AIN0-AIN3) in NRF52832 From Four channels

Two channels(AIN0 &AIN1) for reading two external batteries voltages and reamining two(AIN2 and AIN3)

for reading external peripheral voltages. From four ADC

channels i configured one ADC for for reading one external peripheral voltage like below attached source

code.

I think NRF52832 using one Buffer for serving to all four adc channels. am i right or wrong?

But my aim is to use multiple ADCs channels, How can i approch to do this? please suggest me.

void saadc_init(void)
{
    ret_code_t err_code;

    nrf_saadc_channel_config_t channel_config =
    NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(NRF_SAADC_INPUT_AIN0);  //0.6v for vdd
	  
	
    channel_config.reference = NRF_SAADC_REFERENCE_VDD4; 
	
    err_code = nrf_drv_saadc_init(NULL, saadc_event_handler);  //This is the function call for ADC Default configuration
    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_saadc_channel_init(0, &channel_config);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_saadc_buffer_convert(m_buffer_pool[0],SAMPLES_IN_BUFFER);
    APP_ERROR_CHECK(err_code);

	   
	
    err_code = nrf_drv_saadc_buffer_convert(m_buffer_pool[1],SAMPLES_IN_BUFFER);
    APP_ERROR_CHECK(err_code);
		
		
}

void saadc_event_handler(nrf_drv_saadc_evt_t const * p_event)
{
   if (p_event->type == NRF_DRV_SAADC_EVT_DONE)
   {
      ret_code_t err_code;
		 
		 
		    err_code = nrf_drv_saadc_buffer_convert(p_event->data.done.p_buffer, SAMPLES_IN_BUFFER);
        APP_ERROR_CHECK(err_code);

        int i;
        

        for (i = 0; i < SAMPLES_IN_BUFFER; i++)
        {
	    	int neg_buffer = p_event->data.done.p_buffer[i];
					
			if(neg_buffer < 0)
			{
				neg_buffer = 0;
				printf("ADC Value = %d \r\n", neg_buffer); //amarr
				p_event->data.done.p_buffer[i] = 0;
			}
			else
			{		   	
				printf("ADC Value = %d \r\n", p_event->data.done.p_buffer[i]); //amarr
			}
        }
        m_adc_evt_counter++;
	 }	 
	 else
	 {
	   printf("saadc_event_handler else condition: %d \n", p_event->type); 
	 }
}

void timer_handler(nrf_timer_event_t event_type, void * p_context)
{

}


void saadc_sampling_event_init(void)
{
    ret_code_t err_code;
    err_code = nrf_drv_ppi_init();
    APP_ERROR_CHECK(err_code);
	
	  nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
	  timer_cfg.bit_width = NRF_TIMER_BIT_WIDTH_32;
	
	  err_code = nrf_drv_timer_init(&m_timer, &timer_cfg, timer_handler);
	  APP_ERROR_CHECK(err_code);
		
	 /* setup m_timer for compare event every 400ms */
    uint32_t ticks = nrf_drv_timer_ms_to_ticks(&m_timer, 400);
	  	
		 nrf_drv_timer_extended_compare(&m_timer,
                                   NRF_TIMER_CC_CHANNEL0,
                                   ticks,
                                   NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK,
                                   false);
    nrf_drv_timer_enable(&m_timer);

    uint32_t timer_compare_event_addr = nrf_drv_timer_compare_event_address_get(&m_timer,
                                                                                NRF_TIMER_CC_CHANNEL0);
    uint32_t saadc_sample_task_addr   = nrf_drv_saadc_sample_task_get();

    /* setup ppi channel so that timer compare event is triggering sample task in SAADC */
    err_code = nrf_drv_ppi_channel_alloc(&m_ppi_channel);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_ppi_channel_assign(m_ppi_channel,
                                          timer_compare_event_addr,
                                          saadc_sample_task_addr);
    APP_ERROR_CHECK(err_code);
}


void saadc_sampling_event_enable(void)
{
    ret_code_t err_code = nrf_drv_ppi_channel_enable(m_ppi_channel);

    APP_ERROR_CHECK(err_code);
}





int main(void)
{
   
    uart_init();
    
    timers_init();
    buttons_leds_init(&erase_bonds);
    power_management_init();
    ble_stack_init();
    gap_params_init();
    gatt_init();
    services_init();
    advertising_init();
    conn_params_init();
	  
	  
	  
    // Start execution.
    advertising_start();

    saadc_init();  
	saadc_sampling_event_init(); 
    saadc_sampling_event_enable(); 
			
	  nrf_delay_ms(3000);
		
    // Enter main loop.
while(1)
{
	
}

Thank you,

RE: My NRF52811 Custome board not working as my application.

Jimmy Wong — Fri, 20 Sep 2019 13:31:43 GMT

HI,

Yes, you can use the PCA10040 debug out to program your target board given VDD = 3.0V.

YOu can use the Segger Embedded studio instead of KEIL for running the example.

RE: My NRF52811 Custome board not working as my application.

mandha_amarr — Thu, 19 Sep 2019 16:48:39 GMT

Thank you Jimmy wong,

Can i use PCA10040 board as JLink programmer for my custom board which having NRF52811 SoC. I go through your shared link and downloaded and unzip it. but i cannot open in keil as a project. can you please suggest me how to use it?

Thank you

RE: My NRF52811 Custome board not working as my application.

Jimmy Wong — Thu, 19 Sep 2019 14:18:59 GMT

HI,

This is the example of the S140v7.0.1 wih NRF52811.

https://github.com/jimmywong2003/nrf52811-ble-long-range-demo