nand2/07_Operating_System/02_UART_Test

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