串口波特率

复制import math

# 计算给定波特率下的时钟分频值和误差
baud = 9600          # 目标波特率
f_osc = 16_000_000   # 晶振频率 16 MHz

# 常用 UART 时钟分频公式：BR = f_osc / (16 * divisor)
divisor = f_osc / (16 * baud)
div_int = round(divisor)
actual_baud = f_osc / (16 * div_int)
error = abs(actual_baud - baud) / baud * 100

print(f"理想分频: {divisor:.2f}")
print(f"取整分频: {div_int}")
print(f"实际波特率: {actual_baud:.0f}")
print(f"误差: {error:.2f}%")

复制package main

import (
	"fmt"
	"math"
)

func main() {
	baud := 9600.0
	fOsc := 16_000_000.0

	// 计算分频系数（16倍过采样）
	divisor := fOsc / (16 * baud)
	divInt := math.Round(divisor)
	actualBaud := fOsc / (16 * divInt)
	error := math.Abs(actualBaud-baud) / baud * 100

	fmt.Printf("理想分频: %.2f\n", divisor)
	fmt.Printf("取整分频: %.0f\n", divInt)
	fmt.Printf("实际波特率: %.0f\n", actualBaud)
	fmt.Printf("误差: %.2f%%\n", error)
}

复制// 计算波特率分频与误差
const baud = 9600;
const fOsc = 16_000_000;

const divisor = fOsc / (16 * baud);
const divInt = Math.round(divisor);
const actualBaud = fOsc / (16 * divInt);
const error = Math.abs(actualBaud - baud) / baud * 100;

console.log(`理想分频: ${divisor.toFixed(2)}`);
console.log(`取整分频: ${divInt}`);
console.log(`实际波特率: ${actualBaud.toFixed(0)}`);
console.log(`误差: ${error.toFixed(2)}%`);