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Enhance the serial driver

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Typo fixes
Add an easy way to compute the baud rate
This commit is contained in:
guillaume didier 2020-02-17 13:35:53 +01:00
parent 81a517de6b
commit fcc27d50e3
1 changed files with 10 additions and 4 deletions
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14
polling_serial/src/lib.rs
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@ -40,13 +40,15 @@ pub struct SerialPort {
scratch: Port<u8>, // 7
}
const SCRATCH_VALUE: u8 = 0x42;
const SCRATCH_VALUE: u8 = 0x42; // An arbitrary value used to test serial ports
const DISBALE_INTERRUPTS: u8 = 0x00;
const DISABLE_INTERRUPTS: u8 = 0x00; //
const DLAB: u8 = 0x80;
const DIVISOR: u16 = 0x03;
const BASE_RATE: u32 = 115200;
const DIVISOR: u16 = 0x03; // The baud rate is 38400
const PARITY_MODE: u8 = 0x03;
@ -81,7 +83,7 @@ impl SerialPort {
}
// disable all interrupts
p.int_en.write(DISBALE_INTERRUPTS);
p.int_en.write(DISABLE_INTERRUPTS);
// enable DLAB to set the divisor
p.line_ctrl.write(DLAB);
@ -126,6 +128,10 @@ impl SerialPort {
self.data.read()
}
}
pub fn rate() -> u32 {
BASE_RATE / (DIVISOR as u32)
}
}
impl fmt::Write for SerialPort {