Using serial port with free RTOS - receive issues

[Andreas48752]

Hello,

I would like to use the serial port library with free RTOS. I read several threads that timeouts do not work when using free RTOS. So I tried to use the lib without it.

I always try to read one byte (in an own task). It works in general but every other byte I get wrong (something between 0xE0 and 0xFF). I use a serial terminal to send some keyboard keys.

I am using SDK Version 15.3 with the PCA10056.

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NRF_SERIAL_DRV_UART_CONFIG_DEF(m_uarte0_drv_config,

RX_PIN_NUMBER,ARDUINO_SCL_PIN,

RTS_PIN_NUMBER, CTS_PIN_NUMBER,

NRF_UART_HWFC_DISABLED, NRF_UART_PARITY_EXCLUDED,

NRF_UART_BAUDRATE_38400,

UART_DEFAULT_CONFIG_IRQ_PRIORITY);

#define SERIAL_FIFO_TX_SIZE 128

#define SERIAL_FIFO_RX_SIZE 128

NRF_SERIAL_QUEUES_DEF(serial0_queues, SERIAL_FIFO_TX_SIZE, SERIAL_FIFO_RX_SIZE);

#define SERIAL_BUFF_TX_SIZE 1

#define SERIAL_BUFF_RX_SIZE 1

NRF_SERIAL_BUFFERS_DEF(serial0_buffs, SERIAL_BUFF_TX_SIZE, SERIAL_BUFF_RX_SIZE);

NRF_SERIAL_CONFIG_DEF(serial0_config, NRF_SERIAL_MODE_DMA,

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

NRF_SERIAL_DRV_UART_CONFIG_DEF(m_uarte0_drv_config,
                      RX_PIN_NUMBER,ARDUINO_SCL_PIN,
                      RTS_PIN_NUMBER, CTS_PIN_NUMBER,
                      NRF_UART_HWFC_DISABLED, NRF_UART_PARITY_EXCLUDED,
                      NRF_UART_BAUDRATE_38400,
                      UART_DEFAULT_CONFIG_IRQ_PRIORITY);

#define SERIAL_FIFO_TX_SIZE 128
#define SERIAL_FIFO_RX_SIZE 128

NRF_SERIAL_QUEUES_DEF(serial0_queues, SERIAL_FIFO_TX_SIZE, SERIAL_FIFO_RX_SIZE);


#define SERIAL_BUFF_TX_SIZE 1
#define SERIAL_BUFF_RX_SIZE 1

NRF_SERIAL_BUFFERS_DEF(serial0_buffs, SERIAL_BUFF_TX_SIZE, SERIAL_BUFF_RX_SIZE);



NRF_SERIAL_CONFIG_DEF(serial0_config, NRF_SERIAL_MODE_DMA,
                      &serial0_queues, &serial0_buffs, NULL, NULL);


NRF_SERIAL_UART_DEF(serial0_uarte, 0);


// Task method
void UART_Read_E10_Task()
{
  char c;
  ret_code_t ret;

  while(true)
  {
    ret = nrf_serial_read(&serial0_uarte, &c, sizeof(c), NULL,0);
    if (ret == NRF_SUCCESS)
    {
   
    NRF_LOG_DEBUG("READ E10 %c %i %i",c,c)   
    }
  }
}

Does anyone know what I am doing wrong? Or does anyone have the same problem?

The best would be a working example using both UARTs with free RTOS...

Thanks,

Andreas