Hi,
I am trying to have two instances of SPI with the same data and clock pins but to two different devices and thus two different select pins.
I have set all the SPI_Enable to 1 and this is my code. My goal is to send SPI to two devices on the same SPI port.
The problem is that the spi1 instance never sends anything. If I switch the instances from 0 to 1 and 1 to 0, the one that is instance 0 always works and the one that is instance 1 never does.
Any ideas on this?
Thank you
#define SPI_INSTANCE 0 /**< SPI instance index. */
static const nrf_drv_spi_t spi = NRF_DRV_SPI_INSTANCE(SPI_INSTANCE); /**< SPI instance. */
#define SPI1_INSTANCE 1 /**< SPI instance index. */
static const nrf_drv_spi_t spi1 = NRF_DRV_SPI_INSTANCE(SPI1_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;
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_drv_spi_config_t spi_config = NRF_DRV_SPI_DEFAULT_CONFIG;
spi_config.ss_pin =22;//SPI_SS_PIN;
spi_config.miso_pin = 11;//SPI_MISO_PIN;
spi_config.mosi_pin = 9;//SPI_MOSI_PIN;
spi_config.sck_pin = 7;//SPI_SCK_PIN;
APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, spi_event_handler, NULL));
nrf_drv_spi_config_t spi_config1 = NRF_DRV_SPI_DEFAULT_CONFIG;
spi_config1.ss_pin = 19;//SPI_SS_PIN;
spi_config1.miso_pin = 11;//SPI_MISO_PIN;
spi_config1.mosi_pin = 9;//SPI_MOSI_PIN;
spi_config1.sck_pin = 7;//SPI_SCK_PIN;
APP_ERROR_CHECK(nrf_drv_spi_init(&spi1, &spi_config1, spi_event_handler, NULL));
NRF_LOG_INFO("SPI example started.");
while (1)
{
// 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));
nrf_delay_ms(200);
APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi1, m_tx_buf, m_length, m_rx_buf, m_length));
while (!spi_xfer_done)
{
__WFE();
}
NRF_LOG_FLUSH();
bsp_board_led_invert(BSP_BOARD_LED_0);
nrf_delay_ms(200);
}
}
