Hello,
I have an application that uses the SPI- and the TWI-Manager:
#define I2C_SDA 26 /**< Pin used for the SDA signal by the I2C module. */
#define I2C_SCL 27 /**< Pin used for the SCL signal by the I2C module. */
#define SPI_SS 22 /**< Pin used for the nSS signal by the SPI module. */
#define SPI_MOSI 23 /**< Pin used for the MOSI signal by the SPI module. */
#define SPI_MISO 24 /**< Pin used for the MISO signal by the SPI module. */
#define SPI_SCLK 25 /**< Pin used for the SCLK signal by the SPI module. */
NRF_TWI_MNGR_DEF(TWI_Mngr, 15, 0);
NRF_SPI_MNGR_DEF(SPI_Mngr, 15, 0);
void Init_SPI(void)
{
const nrf_drv_spi_config_t SPI_Config = {
.ss_pin = SPI_SS,
.miso_pin = SPI_MISO,
.mosi_pin = SPI_MOSI,
.sck_pin = SPI_SCLK,
.irq_priority = APP_IRQ_PRIORITY_LOWEST,
.orc = 0xFF,
.frequency = NRF_DRV_SPI_FREQ_8M,
.mode = NRF_DRV_SPI_MODE_0,
.bit_order = NRF_DRV_SPI_BIT_ORDER_MSB_FIRST
};
NRF_LOG_DEBUG("Initialize SPI manager...");
APP_ERROR_CHECK(nrf_spi_mngr_init(&SPI_Mngr, &SPI_Config));
}
void Init_TWI(void)
{
uint8_t Dummy;
const nrf_drv_twi_config_t TWI_Config = {
.scl = I2C_SCL,
.sda = I2C_SDA,
.frequency = NRF_DRV_TWI_FREQ_100K,
.interrupt_priority = APP_IRQ_PRIORITY_LOWEST,
.clear_bus_init = false
};
// Initialize the TWI manager
NRF_LOG_DEBUG("Initialize TWI manager...");
APP_ERROR_CHECK(nrf_twi_mngr_init(&TWI_Mngr, &TWI_Config));
}
int main(void)
{
Init_SPI();
Init_TWI();
}
But the application throws the error code 17 when the program tries to initialize the TWI-Manager. When I change
NRF_TWI_MNGR_DEF(TWI_Mngr, 15, 0);
to
NRF_TWI_MNGR_DEF(TWI_Mngr, 15, 1);
the problem is gone.
So why does the SPI-Manager affect the TWI-Manager? I read the docs and the last parameter is the TWI / SPI module in the microcontroller, so it should be no problem to use the interface with the number 0 for both libraries.
Edit:
The same behavior occurs when I use the raw SPI and TWI driver instead of the manager libraries.
