Hi
I have an application where I cannot use the FIFO buffers (HW or SW). Therefore I need an interrupt for each received byte. If I try to use the uart driver (nrf_drv_uart.c) I have problems enabling the RXDRDY event. Or more precise: If I enable the event, it will be forced disabled again after the first interrupt by the driver.
On the other hand, I have newer seen the RXTO event been triggered. Which I had expexted when the RXDRDY event is not enabled. The STARTRX task is not possible to start, and if I try to do it by using the debugger, it will be disabled again at once.
Following config is done in the sdk_config.h:
#define UART_ENABLED 1
#define UART_EASY_DMA_SUPPORT 0
#define UART_LEGACY_SUPPORT 1
#define UART_DEFAULT_CONFIG_IRQ_PRIORITY 7
#define UART0_ENABLED 1
#define UART0_CONFIG_USE_EASY_DMA 0
And the initialization is done like this:
static void uart_init(void)
{
uint32_t err_code;
nrf_drv_uart_config_t const comm_params =
{
.pselrxd = RX_PIN_NUMBER,
.pseltxd = TX_PIN_NUMBER,
.pselrts = RTS_PIN_NUMBER,
.pselcts = CTS_PIN_NUMBER,
.hwfc = NRF_UART_HWFC_DISABLED,
.parity = NRF_UART_PARITY_EXCLUDED,
.baudrate = NRF_UART_BAUDRATE_115200,
.p_context = NULL
};
err_code = nrf_drv_uart_init(&app_uart_inst, &comm_params, uart_event_handle);
APP_ERROR_CHECK(err_code);
nrf_drv_uart_rx_enable(&app_uart_inst);
}
