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smartwave_uart

Smartwave's UART modules can be interfaced with through the uart_interface.py and SmartwaveAPI

The interface provides four primary functions as follows:

  • uart_init : Configures Smartwave with 2 UARTs

    • Parameters:

      • baudrate : the baudrate to use for UART communication

      • parity_select: 0 - No parity bits 1 - Odd parity 2 - Even parity

      • stop_bits_select: 0 - No stop bits 1 - 1 bit 2 - 1.5 bits 3 - 2 bits

      • shift_direction: 0 - send LSB first 1 - send MSB first

      • tx_len: length (in bits) of the data transmission

      • timeout_microseconds: the UART's timeout in microseconds. - must be a factor of 10 - maximum value is 10,230

    • Pins:

      signal pin
      uart0 TX A1
      uart0 RX A2
      uart1 TX A3
      uart2 RX A4
  • uart_send : Send a sequence of packets via the selected UART

    • Parameters:

      • data_bytes: A list of values to send via UART

      • uart_select: 0 - send via UART0 1 - send via UART1

  • uart_check_received : Check if a there is a received UART transaction on the specified UART that has not yet been read by uart_receive.

    • Paramters:

      • uart_select: the UART device to check
    • Returns:

      • True if the selected UART has an unread transaction
      • False otherwise
  • uart_receive : Read the received data from the specifieed UART and return it as a list

    • Parameters:

      • uart_select: the UART device to read from
    • Returns:

      • a list of all the bytes received on the selected UART since the last time uart_receive was called

Using these four functions, it is possible to drive the UART modules as needed by importing and using the uart_interface.py into your script.

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