c - STM32F103C8/CoIDE/ST-LinkV2 无法更新寄存器

Question

我是 STM32 的新手，而不是嵌入式开发(具有 PIC、dsPIC、MSP430 的经验)。

环境

• CooCox CoIDE
• arm-none-eabi-gcc
• ST-LINK V2(与 Segger J-Link 相同)在 SWD 上

问题描述

我正在尝试使用直接寄存器操作编写一个基本库(STMCube HAL 很酷，但我发现无论如何我都必须阅读数据表，因此首选寄存器操作)。本质上，我只是想使 Blue Pill 开发板上的 LED 闪烁，该开发板上的引脚为 C13。

我可以编译、刷新和调试，但是当我调试时，LED 不闪烁并且寄存器没有变化。寄存器值本身实际上并没有那么重要，因此您不需要出去查看数据表。我只需要能够操纵它们!

单步执行调试器工作正常，variables 观察窗口也适当更新。

我尝试过的事情

虽然这并不详尽(已经几个小时了，所以我可能忘记包括一些)，但这些是我尝试过的一些事情:

• 更改BOOTx 引脚配置
• 更改调试器配置(减慢、加速、重置策略)。
• 将调试器更改为 SEGGER J-Link
• 锁定/解锁 GPIO 引脚

所有的结果都是一样的。我怀疑我可能在 CMSIS 中遗漏了一些东西或一个必要的包含文件，我似乎找不到它。

我可能遗漏的另一点涉及振荡器设置。据我了解，启动时有一个默认配置，除非我想更改它，否则我不必担心。也许这是有缺陷的？

编辑:适用于 STM32CubeMX HAL

当我尝试使用 STM32CUBEMX HAL 进行基本切换时，它起作用了。这让我觉得我在包含、项目设置、振荡器设置等方面缺少一些基本的东西？

代码

主.c

#include "gpio.h"

#define LED_PIN 13


int main(void)
{
    uint32_t i;

    // initialize the peripherals
    GPIO_init();
    GPIOC_setupOutput(LED_PIN, PUSH_PULL, PIN_SPEED_50MHz);

    while(1)
    {
        GPIOC_setPin(LED_PIN);
        for(i=0; i<4000000; i++);
        GPIOC_clearPin(LED_PIN);
        for(i=0; i<4000000; i++);
    }
}

gpio.h

#ifndef _GPIO_H
#define _GPIO_H

#include <stdint.h>
#include <stdbool.h>

typedef enum{
    ANALOG=0b00, FLOATING=0b01, PULL_UP_PULL_DOWN=0b10
}InputPinMode;

typedef enum{
    PUSH_PULL=0b00, OPEN_DRAIN=0b01, AF_PUSH_PULL=0b10, AF_OPEN_DRAIN=0b11
}OutputPinMode;

typedef enum{
    PIN_SPEED_2MHz=0b10, PIN_SPEED_10MHz=0b01, PIN_SPEED_50MHz=0b11
}PinSpeed;

void GPIO_init(void);
void GPIOA_setupInput(uint8_t pinNumber, InputPinMode mode);
void GPIOC_setupInput(uint8_t pinNumber, InputPinMode mode);
void GPIOA_setupOutput(uint8_t pinNumber, OutputPinMode mode, PinSpeed speed);
void GPIOC_setupOutput(uint8_t pinNumber, OutputPinMode mode, PinSpeed speed);

bool GPIOA_readPin(uint8_t pinNumber);


void GPIOA_setPin(uint8_t pinNumber);
void GPIOC_setPin(uint8_t pinNumber);

void GPIOA_clearPin(uint8_t pinNumber);
void GPIOC_clearPin(uint8_t pinNumber);

#endif

gpio.c

#include "stm32f1xx.h"
#include "gpio.h"

/**
 * @brief Initialize GPIO
 */
void GPIO_init(void){
    RCC->APB2ENR |= RCC_APB2ENR_IOPAEN;
    RCC->APB2ENR |= RCC_APB2ENR_IOPBEN;
    RCC->APB2ENR |= RCC_APB2ENR_IOPCEN;
    RCC->APB2ENR |= RCC_APB2ENR_IOPDEN;
    RCC->APB2ENR |= RCC_APB2ENR_IOPEEN;
}

/**
 * @brief Setup pin as an input
 * @param pinNumber the pin number
 * @param mode the input mode
 */
void GPIOA_setupInput(uint8_t pinNumber, InputPinMode mode){
    uint32_t pinNumberLocation, regValue;

    if(pinNumber < 8){
        pinNumberLocation = pinNumber << 2; // bit location
        regValue = (mode << 2) << pinNumberLocation;

        GPIOA->CRL &= ~(0b1111 << pinNumberLocation);   // clear the register
        GPIOA->CRL = regValue;
    }else{
        pinNumberLocation = (pinNumber - 8) << 2;   // bit location
        regValue = (mode << 2) << pinNumberLocation;

        GPIOA->CRH &= ~(0b1111 << pinNumberLocation);   // clear the register
        GPIOA->CRH = regValue;
    }
}

/**
 * @brief Setup port A pin as an output
 * @brief pinNumber the pin number
 * @brief mode the output mode
 * @brief speed the pin speed (lower results in less noise)
 */
void GPIOA_setupOutput(uint8_t pinNumber, OutputPinMode mode, PinSpeed speed){
    uint32_t pinNumberLocation, regValue;

    if(pinNumber < 8){
        pinNumberLocation = pinNumber << 2; // bit location
        regValue = ((mode << 2) << pinNumberLocation) + speed;

        GPIOA->CRL &= ~(0b1111 << pinNumberLocation);   // clear the register
        GPIOA->CRL |= regValue;
    }else{
        pinNumberLocation = (pinNumber - 8) << 2;   // bit location
        regValue = ((mode << 2) << pinNumberLocation) + speed;

        GPIOA->CRH &= ~(0b1111 << pinNumberLocation);   // clear the register
        GPIOA->CRH |= regValue;
    }
}

/**
 * @brief Setup port C pin as an output
 * @brief pinNumber the pin number
 * @brief mode the output mode
 * @brief speed the pin speed (lower results in less noise)
 */
void GPIOC_setupOutput(uint8_t pinNumber, OutputPinMode mode, PinSpeed speed){
    uint32_t pinNumberLocation, regValue;

    if(pinNumber < 8){
        pinNumberLocation = pinNumber << 2; // bit location
        regValue = ((mode << 2) << pinNumberLocation) + speed;

        GPIOC->CRL &= ~(0b1111 << pinNumberLocation);   // clear the register
        GPIOC->CRL |= regValue;
    }else{
        pinNumberLocation = (pinNumber - 8) << 2;   // bit location
        regValue = ((mode << 2) << pinNumberLocation) + speed;

        GPIOC->CRH &= ~(0b1111 << pinNumberLocation);   // clear the register
        GPIOC->CRH |= regValue;
    }
}

bool GPIOA_readPin(uint8_t pinNumber){
    uint16_t mask = 1 << pinNumber;

    if(GPIOA->IDR & mask)
        return true;
    else
        return false;
}

void GPIOA_setPin(uint8_t pinNumber){ GPIOA->BSRR = (1 << pinNumber);}
void GPIOC_setPin(uint8_t pinNumber){ GPIOC->BSRR = (1 << pinNumber);}

void GPIOA_clearPin(uint8_t pinNumber){ GPIOA->BSRR = ~(1 << (pinNumber + 16));}
void GPIOC_clearPin(uint8_t pinNumber){ GPIOC->BSRR = ~(1 << (pinNumber + 16));}

Answer 1

PB2 上的二极管 - 工作代码

volatile uint32_t delay;
#include "stm32f10x.h"
int main(void)
{
  RCC->APB2ENR = RCC_APB2ENR_IOPBEN;
  GPIOB->CRL |= GPIO_CRL_MODE2_1;
  GPIOB->CRL &= ~GPIO_CRL_CNF2_0;

  while(1)
  {
    GPIOB->ODR |= GPIO_ODR_ODR2;   //or GPIO_ODR_2 depending of the .h header version 
    for(delay = 2000000; delay; delay--);
    GPIOB->ODR &= ~GPIO_ODR_ODR2;  //or GPIO_ODR_2 depending of the .h header version 
    for(delay = 2000000; delay; delay--);

    GPIOB->BSRR = 1 << 2;
    for(delay = 2000000; delay; delay--);
    GPIOB->BSRR = 1 << (2 + 16);
    for(delay = 2000000; delay; delay--);
  }
} // change