Hi!
I have a product based on nRF52832 with legacy code, that I would like to port to Zephyr.
It has 3 UART devices connected to the 3 pair of UART pins: GPS SOM on pins 6 and 7, LoRa SOM on pins 8 and 11, and an FTDI chip on pins 12 and 13.
The legacy firmware implements a "uart_select" function that re-configures UART on the fly.
My question is: what would be the proper way to implement this in Zephyr? Would it be possible to use pinmuxes? Or to write a UART mux driver?
Regards,
Eve
void uart_select(uint8_t Uart_Select)
{
ret_code_t err_code;
while(app_uart_send_in_progress());
if(fUartOpen)
app_uart_close();
fUartOpen = 0;
app_uart_comm_params_t comm_params =
{
.rx_pin_no = 0,
.tx_pin_no = 0,
.flow_control = APP_UART_FLOW_CONTROL_DISABLED,
.use_parity = false,
.baud_rate = UARTE_BAUDRATE_BAUDRATE_Baud9600 //UART_BAUDRATE_BAUDRATE_Baud115200
};
if(Uart_Select == UART_LORA){
nrf_gpio_cfg_default(RX_PIN_LORA);
nrf_gpio_cfg_default(TX_PIN_LORA);
comm_params.rx_pin_no = RX_PIN_LORA;
comm_params.tx_pin_no = TX_PIN_LORA;
comm_params.baud_rate = UART_LORA_BAUDRATE;
}
else if(Uart_Select == UART_GPS){
nrf_gpio_cfg_default(RX_PIN_GPS);
nrf_gpio_cfg_default(TX_PIN_GPS);
comm_params.rx_pin_no = RX_PIN_GPS;
comm_params.tx_pin_no = TX_PIN_GPS;
comm_params.baud_rate = UART_GPS_BAUDRATE;
}
else{
nrf_gpio_cfg_default(RX_PIN_FTDI);
nrf_gpio_cfg_default(TX_PIN_FTDI);
comm_params.rx_pin_no = RX_PIN_FTDI;
comm_params.tx_pin_no = TX_PIN_FTDI;
comm_params.baud_rate = UART_FTDI_BAUDRATE;
}
APP_UART_FIFO_INIT(&comm_params,
UART_RX_BUF_SIZE,
UART_TX_BUF_SIZE,
uart_event_handle,
UART_PRIORITY,
err_code);
APP_ERROR_CHECK(err_code);
fUartOpen = 1;
}
