14 lines
359 B
Rust
Executable File
14 lines
359 B
Rust
Executable File
use core::ptr::{read_volatile, write_volatile};
|
|
|
|
|
|
pub const UART_BASE: *mut u32 = 0xE0001000 as *mut u32;
|
|
// pub const UART_BASE: *mut u32 = 0x101000 as *mut u32;
|
|
|
|
|
|
#[export_name="uart_write"]
|
|
pub extern fn write(c: u8) {
|
|
unsafe {
|
|
while read_volatile(UART_BASE.offset(0x2c/4)) & 0x10 != 0 {}
|
|
write_volatile(UART_BASE.offset(0x30/4), c as u32);
|
|
}
|
|
} |