stm32f103c8t6按键控制数码管代码
时间: 2024-05-05 12:14:32 浏览: 18
好的,对于STM32F103C8T6的按键控制数码管代码,可以按照以下步骤进行实现:
1. 确定使用的引脚:首先需要确定使用哪些引脚来连接按键和数码管。
2. 配置GPIO口:使用STM32的GPIO口控制按键和数码管。在代码中需要定义相应的GPIO口,设置为输入或输出模式,并设置相应的上拉/下拉电阻。
3. 检测按键:在代码中使用while循环不断检测按键状态,当按键被按下时,相应的GPIO口会变化状态,此时可以执行相应的操作,如显示数字等。
4. 数码管显示:通过配置GPIO口输出数码管的相应段选和位选信号,实现数字的显示。可以使用循环方式逐位扫描数字,并设置相应的GPIO口状态。
下面是一份简单的代码示例,仅供参考:
```
#include "stm32f10x.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"
#define SEGMENT_PORT GPIOB
#define SEGMENT_A GPIO_Pin_0
#define SEGMENT_B GPIO_Pin_1
#define SEGMENT_C GPIO_Pin_5
#define SEGMENT_D GPIO_Pin_6
#define SEGMENT_E GPIO_Pin_7
#define SEGMENT_F GPIO_Pin_8
#define SEGMENT_G GPIO_Pin_9
#define DIGIT_PORT GPIOA
#define DIGIT_1 GPIO_Pin_0
#define DIGIT_2 GPIO_Pin_1
#define DIGIT_3 GPIO_Pin_2
#define DIGIT_4 GPIO_Pin_3
#define KEY_PORT GPIOC
#define KEY_UP GPIO_Pin_0
#define KEY_DOWN GPIO_Pin_1
void delay(uint32_t nCount);
int main(void)
{
uint8_t digit = 0;
uint8_t segment = {SEGMENT_A, SEGMENT_B, SEGMENT_C, SEGMENT_D, SEGMENT_E, SEGMENT_F, SEGMENT_G};
uint8_t number[10] = {0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x67};
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
// Configure digit pins as output
GPIO_InitStructure.GPIO_Pin = DIGIT_1 | DIGIT_2 | DIGIT_3 | DIGIT_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(DIGIT_PORT, &GPIO_InitStructure);
// Configure segment pins as output
GPIO_InitStructure.GPIO_Pin = SEGMENT_A | SEGMENT_B | SEGMENT_C | SEGMENT_D | SEGMENT_E | SEGMENT_F | SEGMENT_G;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(SEGMENT_PORT, &GPIO_InitStructure);
// Configure key pins as input with pull-up resistor
GPIO_InitStructure.GPIO_Pin = KEY_UP | KEY_DOWN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(KEY_PORT, &GPIO_InitStructure);
while (1)
{
// Detect key press and change the digit to be displayed accordingly
if (GPIO_ReadInputDataBit(KEY_PORT, KEY_UP) == RESET)
{
digit++;
if (digit > 9) digit = 0;
delay(5000);
}
else if (GPIO_ReadInputDataBit(KEY_PORT, KEY_DOWN) == RESET)
{
digit--;
if (digit < 0) digit = 9;
delay(5000);
}
// Display the digit on the 7-segment display
uint8_t i;
for (i = 0; i < 4; i++)
{
uint8_t value = (i == 0 ? digit : number[(digit + i) % 10]);
uint8_t j;
for (j = 0; j < 7; j++)
{
if (value & (1 << j))
GPIO_SetBits(SEGMENT_PORT, segment[j]);
else
GPIO_ResetBits(SEGMENT_PORT, segment[j]);
}
switch (i)
{
case 0: GPIO_SetBits(DIGIT_PORT, DIGIT_1); break;
case 1: GPIO_SetBits(DIGIT_PORT, DIGIT_2); break;
case 2: GPIO_SetBits(DIGIT_PORT, DIGIT_3); break;
case 3: GPIO_SetBits(DIGIT_PORT, DIGIT_4); break;
}
delay(1000);
GPIO_ResetBits(DIGIT_PORT, DIGIT_1 | DIGIT_2 | DIGIT_3 | DIGIT_4);
}
}
}
void delay(uint32_t nCount)
{
for (; nCount != 0; nCount--);
}
```