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.