Hello,
TASK:----------------------------------------------------------------------------------------------------------------------------------
I'm trying to interface LIS3DH in SPI, and read the who_am_i register.
INFORMATION:----------------------------------------------------------------------------------------------------------------------
Im using the SDK nRF5_SDK_15.3.0_59ac345.
I copied the SPI program and edited the main program to the below code. In the sdk_config, i have changed the SPI related tags to 1.
Ex: #ifndef NRFX_SPIM_ENABLED
#define NRFX_SPIM_ENABLED 1
#endif
i have disabled the EASY_DMA for all three, as below
For detailed info, information refer the project.
The main file is as below.
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* Copyright (c) 2015 - 2019, Nordic Semiconductor ASA
*
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*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
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*
* 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
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 4. This software, with or without modification, must only be used with a
* Nordic Semiconductor ASA integrated circuit.
*
* 5. Any software provided in binary form under this license must not be reverse
* engineered, decompiled, modified and/or disassembled.
*
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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*/
#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[]={0x8F, 0x00}; /**< TX buffer. */
static uint8_t m_rx_buf[]={0x00, 0x00 }; /**< RX buffer. */
static const uint8_t m_length = sizeof(m_tx_buf); /**< Transfer length. */
/**
* @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));
}
}
int main(void)
{
bsp_board_init(BSP_INIT_LEDS);
APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
NRF_LOG_DEFAULT_BACKENDS_INIT();
NRF_LOG_INFO("SPI example.");
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;
spi_config.frequency= NRF_DRV_SPI_FREQ_125K;
spi_config.bit_order = NRF_DRV_SPI_BIT_ORDER_MSB_FIRST;
spi_config.mode = NRF_DRV_SPI_MODE_0;
APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, spi_event_handler, NULL));
NRF_LOG_INFO("SPI example started.");
NRF_LOG_FLUSH();
while (1)
{
// Reset rx buffer and transfer done flag
memset(m_rx_buf, 0, m_length);
spi_xfer_done = false;
bsp_board_led_invert(BSP_BOARD_LED_0);
APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, m_tx_buf, 2, m_rx_buf, 2));
while (!spi_xfer_done)
{
__WFE();
}
NRF_LOG_FLUSH();
bsp_board_led_invert(BSP_BOARD_LED_0);
nrf_delay_ms(1000);
}
}
PROBLEM:---------------------------------------------------------------------------------------------------------------------------
The code compiles successfully with no error. When I debug, the control gets stuck in the highlighted function below.
, the NRFX_SPI_ENABLED is enabled in sdk_config, but it still appears grayed out, as below
.
DEBUGGING:---------------------------------------------------------------------------------------------------------------------
Thus while debugging, i get the following pattern,
1. in main.c
2. nrf_drv_spi.c, the highlighted code gets executed.
3. as the nrfx_spi_xfer is grayed out as below,
The control shows result as 0 at step 2 and gets stuff at the while loop.
I'm not able to transfer or receive I suppose, as the control is not printing the transfer complete nrf log also. (i.e., the SPI event handler function is never executed)
Kindly help me resolve this
