CodehighlightingproducedbyActiproCodeHighlighter(freeware)http://www.CodeHighlighter.com/--/********STM8S-DiscoveryDS18B20Test*********版本.........:1.0*目标.........:STM8S105C6T6*文件名.......:main.c* 开发环境.....: IAR for STM8 V1.1***********************************************/#include iostm8s105c6.h#include stdio.h#define BAUD_RATE 9600 //波特率#define F_MASTER 16000000 //主频率#define DS18B20_DQ_OUT PG_DDR_DDR0 = 1 //输出#define DS18B20_DQ_IN PG_DDR_DDR0 = 0 //输入#define DS18B20_DQ_HIGH PG_ODR_ODR0 = 1 //拉高#define DS18B20_DQ_LOW PG_ODR_ODR0 = 0 //拉低#define DS18B20_DQ_PULL_UP PG_CR1_C10 = 1 //上拉#define DS18B20_DQ_FLOATING PG_CR1_C10 = 0 //浮空#define DS18B20_DQ_PUSH_PULL PG_CR1_C10 = 1 //推挽#define DS18B20_DQ_OPEN_DRAIN PG_CR1_C10 = 0 //开漏#define DS18B20_DQ_VALUE PG_IDR_IDR0 //DQ值//串口配置//数据位:8//停止位:1//校验位:Nonevoid UART_Init(void){UART2_CR2_TEN = 1;UART2_CR2_REN = 1;UART2_CR2_RIEN = 1;UART2_BRR2 = ((unsigned char)((F_MASTER / BAUD_RATE) 0x0f)) + (((unsigned char)((F_MASTER / BAUD_RATE) 8)) 0xf0); UART2_BRR1 = ((unsigned char)((F_MASTER / BAUD_RATE) 4));}void UART_TxByte(unsigned char _data){while (UART2_SR_TXE == 0);UART2_DR = _data;}int putchar(int c){UART_TxByte(c);return c;}void _delay_us(unsigned int i){i *= 3;while(--i);}void _delay_ms(unsigned int i){while(i--){_delay_us(1000);}}void DS18B20_Init(void){DS18B20_DQ_OUT;DS18B20_DQ_PUSH_PULL;DS18B20_DQ_HIGH;_delay_us(10);DS18B20_DQ_LOW;_delay_us(600); //复位脉冲DS18B20_DQ_IN;DS18B20_DQ_PULL_UP;_delay_us(100);while(DS18B20_DQ_VALUE == 1);_delay_us(400);}void DS18B20_WriteByte(unsigned char _data){unsigned char i = 0;DS18B20_DQ_OUT;for (i = 0; i 8; i++){DS18B20_DQ_LOW;_delay_us(2);if (_data 0x01){DS18B20_DQ_HIGH;}_data = 1;_delay_us(60);DS18B20_DQ_HIGH;}}unsigned char DS18B20_ReadByte(void){unsigned char i = 0， _data = 0;for (i = 0; i 8; i++){DS18B20_DQ_OUT;DS18B20_DQ_LOW;_delay_us(5);_data = 1;DS18B20_DQ_HIGH;DS18B20_DQ_IN;if (DS18B20_DQ_VALUE){_data |= 0x80;}DS18B20_DQ_OUT;DS18B20_DQ_HIGH;_delay_us(60);}return _data;}float DS18B20_ReadTemperature(void){unsigned char temp = 0;float t = 0;DS18B20_Init();DS18B20_WriteByte(0xcc);DS18B20_WriteByte(0x44);DS18B20_Init();DS18B20_WriteByte(0xcc);DS18B20_WriteByte(0xbe);temp = DS18B20_ReadByte();t = (((temp 0xf0) 4) + (temp 0x07) * 0.125);temp = DS18B20_ReadByte();t += ((temp 0x0f) 4);return t;}int main(void){CLK_SWCR_SWEN = 1;CLK_SWR = 0xB4; //HSE selecte d as master clock sourceUART_Init();printf('********* STM8S-Discovery DS18B20 Test ********* ');printf('Build: %s %s '， __DATE__， __TIME__);asm('rim');while(1){_delay_ms(1000);printf('%.3f '， DS18B20_ReadTemperature());}}#pragma vector = UART2_R_RXNE_vector__ interruptvoid UART2_IRQHandler(void){if (UART2_SR_RXNE == 1){UART_TxByte(UART2_DR);}}原文链接：http://www.eeworld.com.cn/mcu/article_2016101430479.html