基于STM8的DS1302时间程序
时间: 2024-05-10 21:21:31 浏览: 11
以下是基于STM8的DS1302时间程序的示例代码:
```c
#include <iostm8.h>
#include <stdio.h>
#define DS1302_CE_PIN GPIO_PIN_1
#define DS1302_IO_PIN GPIO_PIN_2
#define DS1302_CLK_PIN GPIO_PIN_3
void delay_us(unsigned int us) {
while (us--) {
__asm__("nop");
}
}
void ds1302_write_byte(unsigned char dat) {
unsigned char i;
for (i = 0; i < 8; i++) {
GPIO_WriteLow(GPIOD, DS1302_CLK_PIN);
GPIO_Write(GPIOD, DS1302_IO_PIN, dat & 0x01);
GPIO_WriteHigh(GPIOD, DS1302_CLK_PIN);
dat >>= 1;
}
}
unsigned char ds1302_read_byte(void) {
unsigned char i, dat = 0;
for (i = 0; i < 8; i++) {
GPIO_WriteLow(GPIOD, DS1302_CLK_PIN);
if (GPIO_ReadInputPin(GPIOD, DS1302_IO_PIN)) {
dat |= (0x01 << i);
}
GPIO_WriteHigh(GPIOD, DS1302_CLK_PIN);
}
return dat;
}
void ds1302_write(unsigned char reg, unsigned char dat) {
GPIO_WriteLow(GPIOD, DS1302_CE_PIN);
ds1302_write_byte(reg);
ds1302_write_byte(dat);
GPIO_WriteHigh(GPIOD, DS1302_CE_PIN);
}
unsigned char ds1302_read(unsigned char reg) {
unsigned char dat;
GPIO_WriteLow(GPIOD, DS1302_CE_PIN);
ds1302_write_byte(reg);
dat = ds1302_read_byte();
GPIO_WriteHigh(GPIOD, DS1302_CE_PIN);
return dat;
}
void ds1302_init(void) {
GPIO_Init(GPIOD, DS1302_CE_PIN | DS1302_IO_PIN | DS1302_CLK_PIN, GPIO_MODE_OUT_PP_LOW_FAST);
ds1302_write(0x8e, 0x00);
ds1302_write(0x80, 0x00);
}
void ds1302_get_time(unsigned char *hour, unsigned char *min, unsigned char *sec) {
*hour = ds1302_read(0x85) & 0x3f;
*min = ds1302_read(0x83);
*sec = ds1302_read(0x81);
}
void ds1302_set_time(unsigned char hour, unsigned char min, unsigned char sec) {
ds1302_write(0x8e, 0x00);
ds1302_write(0x80, 0x00);
ds1302_write(0x85, hour);
ds1302_write(0x83, min);
ds1302_write(0x81, sec);
ds1302_write(0x8e, 0x80);
}
void main(void) {
unsigned char hour, min, sec;
CLK_CKDIVR = 0;
ds1302_init();
while (1) {
ds1302_get_time(&hour, &min, &sec);
printf("%02x:%02x:%02x\n", hour, min, sec);
delay_us(1000000);
}
}
```
该程序使用STM8的GPIO口控制DS1302时钟芯片,实现了读取和设置时间的功能。程序在main函数中初始化DS1302时钟芯片,然后不断从DS1302中读取时间并输出到串口上,每秒输出一次。