Usart

A pico-Céu library to send and receive data using USART (Universal Synchronous and Asynchronous Receiver-Transmitter). Windows-only for now.

Includes

 #include "usart.ceu"

Initiate

code/await Usart (var int portNumber) -> NEVER

  • Parameters:

    • var int: Serial port number to use.

  • Example:

spawn Usart(3);

Specify that we'll use the COM3 port.

Send

Usart_TX

Send a byte vector via serial.

code/await Usart_TX (var&[] byte str) -> none

  • Parameters:

    • var&[] byte: the byte vector to send.

  • Example:

spawn Usart(3);

var[5] byte str;
call String_Append_STR(&str, "send");

await Usart_TX(&str);

Create a string and send it via serial using Usart_TX. Check String_Append_STR to learn more string manipulation in Céu.

Receive

Usart_RX

code/await Usart_RX (var&[] byte str, var int nbChar) -> none

  • Payload:

    • var&[] byte: byte vector to store the received data
    • var int: number of bytes to read

  • Example: 

spawn Usart(3);

var[5] byte buffer;
await Usart_RX(&buffer, 5);
String_Print(&buffer);

Receive a string of size 5 from serial port, counting the \0.