47 lines
1.1 KiB
Plaintext
47 lines
1.1 KiB
Plaintext
## UART.jack
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Library that provides access to `UART_TX` and `UART_RX`.
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***
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## Project
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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:
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```
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class Sys {
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function void init() {
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do UART.init(4098);
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while (true){
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do UART.write(UART.read());
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}
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return;
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}
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}
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```
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* Implement `UART.jack`
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* Test in simulation:
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```
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$ cd 02_UARTTest
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$ make
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$ cd ../00_HACK
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$ apio clean
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$ apio sim
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```
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The test bench will simulate the transmission of "RX" to UART_RX. Check if HACK echoes to `UART_TX`.
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* 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:
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```
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$ cd 02_UART_Test
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$ make
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$ make upload
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```
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* Connect HACK with your computer over UART, open a terminal program and type some chars. Check if HACK can echo them.
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```
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$ tio /dev/ttyACM0
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```
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