RE: Receiving Data with BLE and sending them with SPI to a microcontroller, which is used to send data to PC by USB connecti

Jared — Mon, 08 Feb 2021 07:47:52 GMT

What do you see on the SPI lines? Is CS asserted and is the CLK still running or is the transaction ended after the data has been sent

RE: Receiving Data with BLE and sending them with SPI to a microcontroller, which is used to send data to PC by USB connecti

Masoumeh — Sat, 06 Feb 2021 12:28:55 GMT

Hi, the setting for radio is

#define NRF_ESB_DEFAULT_CONFIG {.protocol               = NRF_ESB_PROTOCOL_ESB_DPL,         \
                                .mode                   = NRF_ESB_MODE_PTX,                 \
                                .event_handler          = 0,                                \
                                .bitrate                = NRF_ESB_BITRATE_2MBPS,            \
                                .crc                    = NRF_ESB_CRC_16BIT,                \
                                .tx_output_power        = NRF_ESB_TX_POWER_0DBM,            \
                                .retransmit_delay       = 250,                              \
                                .retransmit_count       = 5,                                \
                                .tx_mode                = NRF_ESB_TXMODE_AUTO,              \
                                .radio_irq_priority     = 1,                                \
                                .event_irq_priority     = 2,                                \
                                .payload_length         = 32,                               \
                                .selective_auto_ack     = false                             \
}

and the priority for SPI was set to 6, but I changed it to 3 and nothing happened.

also I put a breakpoint in SPI handler but it seems that the program never enters the handler.

RE: Receiving Data with BLE and sending them with SPI to a microcontroller, which is used to send data to PC by USB connecti

Jared — Thu, 04 Feb 2021 10:15:19 GMT

Hi,

What do you see on the SPI lines? Is CS and the CLK still running or is the transaction ended after the data has been sent?
What priority are you running the modules at? Could you try to increase the SPI priority?
Set a breakpoint in the SPI handler, and then debug your application. Does the program hit the handler?

regards

Jared

RE: Receiving Data with BLE and sending them with SPI to a microcontroller, which is used to send data to PC by USB connecti

Masoumeh — Wed, 03 Feb 2021 11:41:15 GMT

Hi, the problem with the spi connection is fixed. I changes the master and slave. I rewrote the spi example in sdk17 as below. I receive the data by radio and then I will send it over SPI. but the problem is even that the data is send and I received it in stm32 by spi, but the nrf can not pass the below loop:

while (!spi_xfer_done)
{
__WFE();
}

NRF_LOG_FLUSH();

I don't know why this happen. can you help me?

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 * are permitted provided that the following conditions are met:
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 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form, except as embedded into a Nordic
 *    Semiconductor ASA integrated circuit in a product or a software update for
 *    such product, must reproduce the above copyright notice, this list of
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 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
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 *    Nordic Semiconductor ASA integrated circuit.
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 */
 
#include "nrf_esb.h"

#include <stdbool.h>
#include <stdint.h>
#include "sdk_common.h"
#include "nrf.h"
#include "nrf_esb_error_codes.h"
#include "nrf_error.h"


#include "nrf_drv_spi.h"
#include "app_util_platform.h"
#include "nrf_gpio.h"
#include "nrf_delay.h"
#include "boards.h"
#include "app_error.h"
#include <string.h>


#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"

#define SPI_INSTANCE  0 /**< SPI instance index. */
static const nrf_drv_spi_t spi = NRF_DRV_SPI_INSTANCE(SPI_INSTANCE);  /**< SPI instance. */
static volatile bool spi_xfer_done;  /**< Flag used to indicate that SPI instance completed the transfer. */

#define TEST_STRING "Nordic"
static uint8_t       m_tx_buf[32] = {0,1,2,3,4,5,6,7,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31};           /**< TX buffer. */
static uint8_t       m_rx_buf[sizeof(m_tx_buf)+1];    /**< RX buffer. */
static const uint8_t m_length = sizeof(m_tx_buf);        /**< Transfer length. */
int k=0;
/**
 * @brief SPI user event handler.
 * @param event
 */
void spi_event_handler(nrf_drv_spi_evt_t const * p_event,
                       void *                    p_context)
{
    spi_xfer_done = true;
    NRF_LOG_INFO("Transfer completed.");
    if (m_rx_buf[0] != 0)
    {
        NRF_LOG_INFO(" Received:");
        NRF_LOG_HEXDUMP_INFO(m_rx_buf, strlen((const char *)m_rx_buf));
    }
}

/**********  NRF ESB RX begins **********/
uint8_t led_nr;
nrf_esb_payload_t rx_payload;

/*lint -save -esym(40, BUTTON_1) -esym(40, BUTTON_2) -esym(40, BUTTON_3) -esym(40, BUTTON_4) -esym(40, LED_1) -esym(40, LED_2) -esym(40, LED_3) -esym(40, LED_4) */

void nrf_esb_event_handler(nrf_esb_evt_t const * p_event)
{
    switch (p_event->evt_id)
    {
        case NRF_ESB_EVENT_TX_SUCCESS:
            NRF_LOG_DEBUG("TX SUCCESS EVENT");
            break;
        case NRF_ESB_EVENT_TX_FAILED:
            NRF_LOG_DEBUG("TX FAILED EVENT");
            break;
        case NRF_ESB_EVENT_RX_RECEIVED:
            NRF_LOG_DEBUG("RX RECEIVED EVENT");
            if (nrf_esb_read_rx_payload(&rx_payload) == NRF_SUCCESS)
            {
							for (int i=0; i<32; i++)
							{
								m_tx_buf[i] = rx_payload.data[i];
							}
							
							// Reset rx buffer and transfer done flag
							memset(m_rx_buf, 0, m_length);
							spi_xfer_done = false;
							m_tx_buf[31]=k++;
							APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, m_tx_buf, m_length, m_rx_buf, m_length));

							while (!spi_xfer_done)
							{
									__WFE();
							}

							NRF_LOG_FLUSH();
             }
						
				     break;		
    }

}

void clocks_start( void )
{
    NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
    NRF_CLOCK->TASKS_HFCLKSTART = 1;

    while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0);
}


uint32_t esb_init( void )
{
    uint32_t err_code;
    uint8_t base_addr_0[4] = {0xE7, 0xE7, 0xE7, 0xE7};
    uint8_t base_addr_1[4] = {0xC2, 0xC2, 0xC2, 0xC2};
    uint8_t addr_prefix[8] = {0xE7, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8 };
    nrf_esb_config_t nrf_esb_config         = NRF_ESB_DEFAULT_CONFIG;
    nrf_esb_config.protocol                 = NRF_ESB_PROTOCOL_ESB_DPL;
    nrf_esb_config.bitrate                  = NRF_ESB_BITRATE_2MBPS_BLE;
    nrf_esb_config.mode                     = NRF_ESB_MODE_PRX;
    nrf_esb_config.event_handler            = nrf_esb_event_handler;
    nrf_esb_config.selective_auto_ack       = false;

    err_code = nrf_esb_init(&nrf_esb_config);
    VERIFY_SUCCESS(err_code);

    err_code = nrf_esb_set_base_address_0(base_addr_0);
    VERIFY_SUCCESS(err_code);

    err_code = nrf_esb_set_base_address_1(base_addr_1);
    VERIFY_SUCCESS(err_code);

    err_code = nrf_esb_set_prefixes(addr_prefix, 8);
    VERIFY_SUCCESS(err_code);

    return err_code;
}

/******** NRF ESB RX ends *********/


int main(void)
{
    uint32_t err_code;
  
   	bsp_board_init(BSP_INIT_LEDS);

    APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
    NRF_LOG_DEFAULT_BACKENDS_INIT();
	
	  clocks_start();


    nrf_drv_spi_config_t spi_config = NRF_DRV_SPI_DEFAULT_CONFIG;
    spi_config.ss_pin   = SPI_SS_PIN;
    spi_config.miso_pin = SPI_MISO_PIN;
    spi_config.mosi_pin = SPI_MOSI_PIN;
    spi_config.sck_pin  = SPI_SCK_PIN;
    APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, spi_event_handler, NULL));
    NRF_LOG_INFO("SPI example started.");

	
	  err_code = esb_init();
    APP_ERROR_CHECK(err_code);

    NRF_LOG_DEBUG("Enhanced ShockBurst Receiver Example started.");

    err_code = nrf_esb_start_rx();
    APP_ERROR_CHECK(err_code);
		
    while (1)
    {

    }
}

RE: Receiving Data with BLE and sending them with SPI to a microcontroller, which is used to send data to PC by USB connecti

Jared — Wed, 13 Jan 2021 14:20:07 GMT

Hi,

I think the first step would be to probe the SCK, MISO, MOSI, and CS line and check if everything looks correct. This means that the clock is sent correctly, the CS line asserted during the transaction, and the data being sent on MOSI and MISO is correct. You can use either a logical analyzer or a oscilloscope to verify this. It would be great if you could also upload an snapshot of the trace.

regards

Jared

RE: Receiving Data with BLE and sending them with SPI to a microcontroller, which is used to send data to PC by USB connecti

Masoumeh — Tue, 12 Jan 2021 13:03:54 GMT

I know that, but it will takes time to order nRF52840 and get it. Also, a STM micro is somehow necessary in my work.

RE: Receiving Data with BLE and sending them with SPI to a microcontroller, which is used to send data to PC by USB connecti

abdelali — Tue, 12 Jan 2021 12:58:36 GMT

Hey,

What if you used the nRF52840 instead of the STM32+nRF52832 ?

The nRF52840 has the USB peripheral, and you got libraries for handling common USB classes like CDCM, HID ...