SPI nrf52832

Question

hi, 
 I am trying to add SPI (master) codes into the ble_app_uart. 
 My setting for SPI is as follows: 
 #define SPI1_ENABLED 1 // #define SPI_INSTANCE 1 /**< SPI instance index. */ //#define SPI0_ENABLED 0 #define SPIM_IN_USE 0 #define SPI_IN_USE 1 
 I have included the nrf_drv_spi.h and nrf_drv_config.h in main.c 
 yet when I am trying to compile the project. One error occurred in nrf_drv_spi.c(which I added into the project) indicting "wrong configuration" 
 And even if I assigned the value of SPIM_IN_USE and SPI_IN_USE, the error still occurs. After compiling, a window shows saying "browse information of one or more files is not available" 
 I am wondering what's wrong with it?

haakonsh · Answer

Hey maslooo, You should add the following lines of code to your sdk_config.h file: #ifndef SPI_SCK_PIN #define SPI_SCK_PIN YOUR_PIN_NUMBER #endif #ifndef SPI_MISO_PIN #define SPI_MISO_PIN YOUR_PIN_NUMBER #endif #ifndef SPI_MOSI_PIN #define SPI_MOSI_PIN YOUR_PIN_NUMBER #endif #ifndef SPI_SS_PIN #define SPI_SS_PIN YOUR_PIN_NUMBER #endif // SPI_ENABLED - nrf_drv_spi - SPI/SPIM peripheral driver //========================================================== #ifndef SPI_ENABLED #define SPI_ENABLED 1 #endif // SPI_DEFAULT_CONFIG_IRQ_PRIORITY - Interrupt priority // Priorities 0,2 (nRF51) and 0,1,4,5 (nRF52) are reserved for SoftDevice // <0=> 0 (highest) // <1=> 1 // <2=> 2 // <3=> 3 // <4=> 4 // <5=> 5 // <6=> 6 // <7=> 7 #ifndef SPI_DEFAULT_CONFIG_IRQ_PRIORITY #define SPI_DEFAULT_CONFIG_IRQ_PRIORITY 7 #endif // SPI_DEFAULT_FREQUENCY - SPI frequency // <33554432=> 125 kHz // <67108864=> 250 kHz // <134217728=> 500 kHz // <268435456=> 1 MHz // <536870912=> 2 MHz // <1073741824=> 4 MHz // <2147483648=> 8 MHz #ifndef SPI_DEFAULT_FREQUENCY #define SPI_DEFAULT_FREQUENCY 1073741824 #endif // NRF_SPI_DRV_MISO_PULLUP_CFG - MISO PIN pull-up configuration. // <0=> NRF_GPIO_PIN_NOPULL // <1=> NRF_GPIO_PIN_PULLDOWN // <3=> NRF_GPIO_PIN_PULLUP #ifndef NRF_SPI_DRV_MISO_PULLUP_CFG #define NRF_SPI_DRV_MISO_PULLUP_CFG 1 #endif // SPI0_ENABLED - Enable SPI0 instance //========================================================== #ifndef SPI0_ENABLED #define SPI0_ENABLED 1 #endif // SPI0_USE_EASY_DMA - Use EasyDMA #ifndef SPI0_USE_EASY_DMA #define SPI0_USE_EASY_DMA 1 #endif main.c: #include "nrf_drv_spi.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[] = TEST_STRING; /**< TX buffer. */ static uint8_t m_rx_buf[sizeof(TEST_STRING) + 1]; /**< 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; } void spi_init(void) { 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)); } int main(void) { spi_init(); while (1) { /*** transfer the test string every 200ms***/ // Reset rx buffer and transfer done flag memset(m_rx_buf, 0, m_length); spi_xfer_done = false; APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, m_tx_buf, m_length, m_rx_buf, m_length)); while (!spi_xfer_done) { __WFE(); } nrf_delay_ms(200); } } Cheers, Håkon.