代码之家 › 专栏 › 技术社区 › A191919

从盖革计数器接收输入

stm32 c

A191919 · 技术社区 · 6 年前

我正在尝试将照片上设备的输出信号发送到stm32f100rbt6b。我在stm32f100rbt6b上将uin管脚从盖革计数器连接到pa10管脚,但似乎工作不正常,因为每次盖革计数器点击lcd显示屏时都不递增数字。我认为这与错误的pin10模式有关。哪个是对的?用 GPIO_Mode_IN_FLOATING 增量太快。

#include "stm32f10x.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x_gpio.h"

#define LCD_PORT GPIOC
#define LCD_RCC_GPIO RCC_AHB1Periph_GPIOC
#define LCD_E_Pin GPIO_Pin_12
#define LCD_RS_Pin GPIO_Pin_10

void delay(unsigned int s);
void lcd_init_gpio();
void lcd_write_data(int data);
void lcd_init();
void lcd_write_str(char*str);
void lcd_write_cmd(u16 cmd);
void lcd_set_cursor(int line,int pos);
void lcd_write_dec_xxx(uint16_t data);
void lcd_write_dec_xxx(uint16_t data);
void lcd_write_dec_xx(uint8_t data);
void lcd_write_dec_x(uint8_t data);
int counter = 0;

int main(void)
{
      lcd_init();
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

        GPIO_InitTypeDef initInput;
        initInput.GPIO_Mode = GPIO_Mode_AIN;
        initInput.GPIO_Speed = GPIO_Speed_2MHz;
        initInput.GPIO_Pin = GPIO_Pin_10;
        GPIO_Init(GPIOA, &initInput);
      lcd_set_cursor(0,1);

    while(1){

                    if (GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_10))
                    {
                        counter=counter+1;
                        lcd_set_cursor(0,3);
                        lcd_write_dec_xxx(((uint8_t)counter));
                        delay(1000000);
                    }           

    }
}

void delay(unsigned int s){
    while(--s > 0) {
        __NOP();
    }
}

const uint8_t lcd_2x16_decode[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };

void lcd_write_dec_xxxx(uint16_t data){
    lcd_write_data(lcd_2x16_decode[(data / 1000) & 0x0F]);
    lcd_write_data(lcd_2x16_decode[((data % 1000) / 100) & 0x0F]);
    lcd_write_data(lcd_2x16_decode[((data % 1000) % 100) / 10 & 0x0F]);
    lcd_write_data(lcd_2x16_decode[((data % 1000) % 100) % 10 & 0x0F]);
}

void lcd_write_dec_xxx(uint16_t data){
    lcd_write_data(lcd_2x16_decode[(data / 100) & 0x0F]);
    lcd_write_data(lcd_2x16_decode[((data % 100) / 10) & 0x0F]);
    lcd_write_data(lcd_2x16_decode[((data % 100) % 10) & 0x0F]);
}

void lcd_write_dec_xx(uint8_t data){
    lcd_write_data(lcd_2x16_decode[((data % 100) / 10) & 0x0F]);
    lcd_write_data(lcd_2x16_decode[((data % 100) % 10) & 0x0F]);
}

void lcd_write_dec_x(uint8_t data) {
    lcd_write_data(lcd_2x16_decode[data]);
}
void lcd_init_gpio() {
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);
    GPIO_InitTypeDef init;
    init.GPIO_Mode = GPIO_Mode_Out_PP;
    init.GPIO_Speed=GPIO_Speed_50MHz;
    init.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_10  | GPIO_Pin_12;
    GPIO_Init(GPIOC, &init);
}
void lcd_write_data(int data) {
    GPIO_SetBits(LCD_PORT,data | LCD_E_Pin);
    delay(0xFFFF);
    GPIO_ResetBits(LCD_PORT,LCD_E_Pin | data);
}
void lcd_init() {
    lcd_init_gpio();
    int del = 99999;
    GPIO_ResetBits(LCD_PORT, LCD_RS_Pin);
    delay(del);
    lcd_write_data(0x30);
    delay(del);
    lcd_write_data(0x30);
    delay(del);
    lcd_write_data(0x30);
    delay(del);
    lcd_write_data(0x38);
    delay(del);
    lcd_write_data(0x0f);
    delay(del);
    lcd_write_data(0x01);
    delay(del);
    lcd_write_data(0x06);
    delay(del);
    lcd_write_data(0x02);
    delay(del);
    GPIO_SetBits(LCD_PORT,LCD_RS_Pin);
}

void lcd_write_str(char*str) {
    do {
        lcd_write_data(*str);
    }while(*++str);
}
void lcd_write_cmd(u16 cmd) {
    GPIO_ResetBits(LCD_PORT,LCD_RS_Pin);
    lcd_write_data(cmd);
    GPIO_SetBits(LCD_PORT,LCD_RS_Pin);
}
void lcd_set_cursor(int line,int pos) {
    pos |=0x80;
    if (line == 1) {
        pos += 0x40;
    }
    lcd_write_cmd(pos);
}

0 回复 | 直到 6 年前

Andy J 6 年前

您已将PA10引脚初始化为模拟输入。如果你想使用带液晶屏的模拟输入,你需要在这个引脚上设置一个ADC。

如果要将PA10管脚设置为普通的高/低数字输入,请执行以下操作:

/* Setup PA10 input */
void PA10_Config(void)
{
  /* Local variables */
  GPIO_InitTypeDef   GPIO_InitStructure;

  /* Configure PA10 as input */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
}

但看看你的申请表,你可能不想这样。你最可能寻找的是带有ADC的模拟输入,它将该管脚上的模拟电压转换成你的微型计算机可以解释的数字。

如果你想让pa10作为一个adc的模拟输入,不幸的是这是不可能的,根据 Table 4. Low & medium-density STM32F100xx pin definitions 在STM32F100X6数据表的一节中,ADC未列为该引脚的替代功能(AFS)之一: