nand2/07_Operating_System/02_UART_Test
2023-08-04 16:44:31 +02:00
..
GPIO.jack added v2.0 2023-01-11 23:04:57 +01:00
Makefile changed python tools to python3.11 2023-08-04 16:44:31 +02:00
Readme.md added v2.0 2023-01-11 23:04:57 +01:00
Readme.md.backup added v2.0 2023-01-11 23:04:57 +01:00
Sys.jack added v2.0 2023-01-11 23:04:57 +01:00
UART.jack added v2.0 2023-01-11 23:04:57 +01:00
uart.png added v2.0 2023-01-11 23:04:57 +01:00

UART.jack

Library that provides character based access to UART_TX and UART_RX.

UART_Test

In the Testfolder 02_UART_Test you find a minimal version of Sys.jack containing the init function Sys.init(), which is called after starting JACK-OS. Sys.init() is the JACK-OS version of echo.asm, which reads the bytes received at UART_RX and writes the values to UART_TX in an endless loop:

class Sys {

    function void init() {
        do UART.init(4098);
        while (true){
            do UART.write(UART.read());
        }        
        return;
    }
}

Project

  • Implement UART.jack

  • Test in simulation:

    $ cd 02_UARTTest
    $ make
    $ cd ../00_HACK
    $ apio clean
    $ apio sim
    

    The test bench will simulate the transmission of "RX" to UART_RX. Check if HACK echoes to UART_TX.

  • run in real hardware with HACK build at 06_IO_Devices/05_GO (together with the bootloader). Build and upload the UART_Test to iCE40HX1K-EVB with:

    $ cd 02_UART_Test
    $ make
    $ make upload
    
  • Connect HACK with your computer over UART, open a terminal program and type some chars. Check if HACK can echo them.

    $ tio /dev/ttyACM0