用c语言写一个stm32f103c6的74ch165的程序
时间: 2024-05-10 17:15:26 浏览: 15
好的,我明白了。对于您的问题,以下是一个简单的示例程序,用于读取74HC165的输入:
```c
#include <stdint.h>
#include "stm32f103c6.h"
// Pin Configuration
#define LATCH_PORT GPIOA
#define LATCH_PIN 0
#define CLK_PORT GPIOA
#define CLK_PIN 1
#define DATA_PORT GPIOA
#define DATA_PIN 2
uint8_t read_74HC165(void) {
uint8_t data = 0;
uint8_t i;
// Pull the latch high
LATCH_PORT->ODR |= (1 << LATCH_PIN);
// Shift in the bits
for (i = 0; i < 8; i++) {
// Pull the clock pin low
CLK_PORT->ODR &= ~(1 << CLK_PIN);
// Read a bit from the data pin
data |= ((DATA_PORT->IDR & (1 << DATA_PIN)) >> DATA_PIN) << (7 - i);
// Pull the clock pin high
CLK_PORT->ODR |= (1 << CLK_PIN);
}
// Pull the latch low to signal end of transmission
LATCH_PORT->ODR &= ~(1 << LATCH_PIN);
return data;
}
int main(void) {
// Enable clocks to all required peripherals
RCC->APB2ENR |= RCC_APB2ENR_IOPAEN;
// Configure pins as inputs/outputs
LATCH_PORT->CRL &= ~GPIO_CRL_MODE0;
LATCH_PORT->CRL |= GPIO_CRL_MODE0_1;
CLK_PORT->CRL &= ~GPIO_CRL_MODE1;
CLK_PORT->CRL |= GPIO_CRL_MODE1_1;
DATA_PORT->CRL &= ~GPIO_CRL_MODE2;
while (1) {
uint8_t input = read_74HC165();
// Do something with the input
}
}
```
请注意,此示例程序仅用于演示目的,并可能需要进行修改才能适用于您的硬件配置。另外,对于任何实际应用程序,应考虑添加错误检查和防抖动技术。