You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
23 lines
616 B
Markdown
23 lines
616 B
Markdown
# Tutorial 05 - UART0, PL011
|
|
|
|
This tutorial does the same as tutorial 04, but it prints the serial number on
|
|
UART0. As such, it can be used easily with qemu, like
|
|
|
|
```sh
|
|
$ make # To build the kernel
|
|
$ make qemu
|
|
<Press any key>
|
|
Hello Rustacean!
|
|
My serial number is: 0000000000000000
|
|
```
|
|
|
|
## uart.rs
|
|
|
|
Before we could use a rate divisor value, we must establish a valid clock rate
|
|
for the PL011. It's done via mailboxes, with the same property channel we used
|
|
earlier. Otherwise this interface is identical to the UART1 one.
|
|
|
|
## main.rs
|
|
|
|
We query the board's serial number and then we display it on the serial console.
|