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[wip] add serial configuration

This commit is contained in:
Berkus Decker 2019-03-10 10:04:21 +02:00
parent bf6d3f7f16
commit d588405d28
2 changed files with 71 additions and 30 deletions
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30
doc/rpi3_serial.md Normal file
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@ -0,0 +1,30 @@
# Connecting RPi3 UART
## Using cp2104 usb-to-ttl converter
Download drivers from: https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers
Install `minicom`: `brew install minicom`
Configure minicom to use `/dev/tty.SLAB_USBtoUART` port.
Connect rpi wires to cp2014:
```
UART0
FUNC | GPIO | PIN # | MODE | Wire color
------+--------+---------+--------+------------
RXD0 | GPIO15 | 10 | Alt0 | Brown
TXD0 | GPIO14 | 8 | Alt0 | Red
```
```
MiniUart (UART1)
FUNC | GPIO | PIN # | MODE | Wire color
------+--------+---------+--------+------------
RXD1 | GPIO15 | 10 | Alt5 | Brown
TXD1 | GPIO14 | 8 | Alt5 | Red
GND | GND | 6 | | Green
```

71
src/main.rs
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@ -55,41 +55,52 @@ use platform::{
/// The global console. Output of the print! and println! macros.
static CONSOLE: sync::NullLock<devices::Console> = sync::NullLock::new(devices::Console::new());
// Kernel entry point
// arch crate is responsible for calling this
fn kmain() -> ! {
// let gpio = GPIO::new_default();
// let uart = platform::MiniUart::new_default();
// uart.init(&gpio);
// CONSOLE.lock(|c| {
// // Moves uart into the global CONSOLE. It is not accessible
// // anymore for the remaining parts of kernel_entry().
// c.replace_with(uart.into());
// });
// let uart = platform::PL011Uart::new_default();
// let mut mbox = platform::mailbox::Mailbox::new();
// match uart.init(&mut mbox, &gpio) {
// Ok(_) => {
// CONSOLE.lock(|c| {
// // Moves uart into the global CONSOLE. It is not accessible
// // anymore for the remaining parts of kernel_entry().
// c.replace_with(uart.into());
// });
// }
// Err(_) => endless_sleep(),
// }
fn init_jlink_rtt() {
CONSOLE.lock(|c| {
c.replace_with(Output::new().into());
});
jtag_dbg_wait();
println!("\n[0] JLink RTT is live!");
}
println!("\n[0] UART is live!");
fn init_uart_serial() {
let gpio = GPIO::new_default();
let uart = platform::MiniUart::new_default();
uart.init(&gpio);
CONSOLE.lock(|c| {
// Moves uart into the global CONSOLE. It is not accessible
// anymore for the remaining parts of kernel_entry().
c.replace_with(uart.into());
});
println!("[0] MiniUART is live!");
let uart = platform::PL011Uart::new_default();
let mut mbox = platform::mailbox::Mailbox::new();
match uart.init(&mut mbox, &gpio) {
Ok(_) => {
CONSOLE.lock(|c| {
// Moves uart into the global CONSOLE. It is not accessible
// anymore for the remaining parts of kernel_entry().
c.replace_with(uart.into());
});
}
Err(_) => endless_sleep(), // @todo ignore error because MiniUart is still there?
}
println!("[0] UART0 is live!");
}
// Kernel entry point
// arch crate is responsible for calling this
fn kmain() -> ! {
init_jlink_rtt();
// init_uart_serial();
// jtag_dbg_wait();
extern "C" {
static __exception_vectors_start: u64;