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uart: remove type conversion from baud_rate_gen

This commit is contained in:
Astro 2019-05-30 00:22:45 +02:00
parent a645d13f4b
commit b961526b97
1 changed files with 2 additions and 3 deletions
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5
src/uart/baud_rate_gen.rs
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@ -1,8 +1,8 @@
use crate::regs::*; use crate::regs::*;
use super::regs::{RegisterBlock, BaudRateGen, BaudRateDiv}; use super::regs::{RegisterBlock, BaudRateGen, BaudRateDiv};
const BDIV_MIN: u8 = 4; const BDIV_MIN: u32 = 4;
const BDIV_MAX: u8 = 255; const BDIV_MAX: u32 = 255;
const CD_MAX: u16 = 65535; const CD_MAX: u16 = 65535;
fn div_round_closest(q: u32, d: u32) -> u32 { fn div_round_closest(q: u32, d: u32) -> u32 {
@ -17,7 +17,6 @@ pub fn configure(regs: &mut RegisterBlock, mut clk: u32, baud: u32) {
let mut best = None; let mut best = None;
for bdiv in BDIV_MIN..=BDIV_MAX { for bdiv in BDIV_MIN..=BDIV_MAX {
let bdiv: u32 = bdiv.into();
let cd = div_round_closest(clk, baud * (bdiv + 1)); let cd = div_round_closest(clk, baud * (bdiv + 1));
if cd < 1 || cd > CD_MAX.into() { if cd < 1 || cd > CD_MAX.into() {
continue; continue;