写一个可以充电的c语言驱动
时间: 2023-09-11 19:06:23 浏览: 41
下面是一个简单的 C 语言驱动程序,可以控制充电器的充电状态:
```c
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/i2c-dev.h>
#define I2C_ADDR 0x48
#define REG_CONFIG 0x01
#define REG_CHARGE 0x02
int main(void) {
int fd;
char buf[2];
int charge = 0;
fd = open("/dev/i2c-1", O_RDWR);
if (fd == -1) {
printf("Failed to open I2C device\n");
exit(1);
}
if (ioctl(fd, I2C_SLAVE, I2C_ADDR) == -1) {
printf("Failed to set I2C slave address\n");
exit(1);
}
buf[0] = REG_CONFIG;
buf[1] = 0x01; // Enable charging
if (write(fd, buf, 2) != 2) {
printf("Failed to write to I2C device\n");
exit(1);
}
while (1) {
// Read charge status from register
buf[0] = REG_CHARGE;
if (write(fd, buf, 1) != 1) {
printf("Failed to write to I2C device\n");
exit(1);
}
if (read(fd, buf, 1) != 1) {
printf("Failed to read from I2C device\n");
exit(1);
}
charge = (buf[0] >> 4) & 0x03; // Extract charge status
if (charge == 3) {
printf("Battery fully charged\n");
break;
}
sleep(60); // Wait 1 minute before checking status again
}
buf[0] = REG_CONFIG;
buf[1] = 0x00; // Disable charging
if (write(fd, buf, 2) != 2) {
printf("Failed to write to I2C device\n");
exit(1);
}
close(fd);
return 0;
}
```
这个驱动程序使用 Linux 的 I2C 接口与充电器进行通信。它首先写入一个字节到配置寄存器,以启用充电。然后它重复地读取充电状态寄存器,直到充电状态为“3”,表示电池已充满。最后,它再次写入一个字节到配置寄存器,以禁用充电。
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