野火教程+正点原子F103精英版
main.c
#include "stm32f10x.h"
#include "stm32f10x_gpio.h"
#define LED_G_GPIO_PORT GPIOB
#define LED_G_GPIO_CLK_ENABLE RCC->APB2ENR |= ((1)<<(3))
#define LED_G_GPIO_PIN GPIO_Pin_5
void Delay(uint32_t count)
{
while(count --);
}
int main(void)
{
#if 0
*(unsigned int*)0X40021018 |= ((1)<<(3));
//端口配置低寄存器CRL，输出模式，最大速度10MHz
*(unsigned int*)0X40010C00 |= (1<<(4*5));
//端口输出寄存器ODR设置PB5输出数据0
*(unsigned int*)0X40010C0C &= ~(1<<5);
#elif 0
RCC_APB2ENR |= ((1)<<(3));
//端口配置低寄存器CRL，输出模式，最大速度10MHz
GPIOB_CRL |= (1<<(4*5));
//端口输出寄存器ODR设置PB5输出数据0
GPIOB_ODR &= ~(1<<5);
#elif 0
RCC->APB2ENR |= ((1)<<(3));
GPIOB->CRL |= (1<<(4*5));
GPIOB->ODR &= ~(1<<5);
#elif 0
RCC->APB2ENR |= ((1)<<(3));
GPIOB->CRL |= (1<<(4*5));
GPIOB->ODR &= ~(1<<5);
GPIO_SetBits(GPIOB, GPIO_Pin_5);
GPIO_ResetBits(GPIOB, GPIO_Pin_5);
#elif 0
GPIO_InitTypeDef GPIO_InitStructure;
RCC->APB2ENR |= ((1)<<(3));
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_SetBits(GPIOB, GPIO_Pin_5);
GPIO_ResetBits(GPIOB, GPIO_Pin_5);
#elif 1
GPIO_InitTypeDef GPIO_InitStructure;
LED_G_GPIO_CLK_ENABLE;
GPIO_InitStructure.GPIO_Pin = LED_G_GPIO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(LED_G_GPIO_PORT, &GPIO_InitStructure);
while(1)
{
GPIO_SetBits(LED_G_GPIO_PORT, LED_G_GPIO_PIN);
Delay(0xFFFF);
GPIO_ResetBits(LED_G_GPIO_PORT, LED_G_GPIO_PIN);
Delay(0xFFFF);
}
#endif
}
stm32f10x.h
#ifndef __STM32F10X_H
#define __STM32F10X_H
#define PERIPH_BASE ((unsigned int) 0x40000000)
#define APB1PERIPH_BASE PERIPH_BASE
#define APB2PERIPH_BASE (PERIPH_BASE + 0x10000)
#define AHBPERIPH_BASE (PERIPH_BASE + 0x20000)
#define RCC_BASE (AHBPERIPH_BASE + 0x1000)
#define GPIOB_BASE (APB2PERIPH_BASE + 0xC00)
// #define RCC_APB2ENR *(unsigned int*)(RCC_BASE + 0x18)
// #define GPIOB_CRL *(unsigned int*)(GPIOB_BASE + 0x00)
// #define GPIOB_CRH *(unsigned int*)(GPIOB_BASE + 0x04)
// #define GPIOB_IDR *(unsigned int*)(GPIOB_BASE + 0x08)
// #define GPIOB_ODR *(unsigned int*)(GPIOB_BASE + 0x0C)
// #define GPIOB_BSRR *(unsigned int*)(GPIOB_BASE + 0x10)
// #define GPIOB_BRR *(unsigned int*)(GPIOB_BASE + 0x14)
// #define GPIOB_LCKR *(unsigned int*)(GPIOB_BASE + 0x18)
typedef unsigned int uint32_t;
typedef unsigned short uint16_t;
typedef struct
{
uint32_t CRL;
uint32_t CRH;
uint32_t IDR;
uint32_t ODR;
uint32_t BSRR;
uint32_t BRR;
uint32_t LCKR;
}GPIO_TypeDef;
typedef struct
{
uint32_t CR;
uint32_t CFGR;
uint32_t CIR;
uint32_t APB2RSTR;
uint32_t APB1RSTR;
uint32_t AHBENR;
uint32_t APB2ENR;
uint32_t APB1ENR;
uint32_t BDCR;
uint32_t CSR;
}RCC_TypeDef;
#define GPIOB ((GPIO_TypeDef*)GPIOB_BASE)
#define RCC ((RCC_TypeDef*)RCC_BASE)
#endif /*__STM32F10X_H*/
stm32f10x_gpio.c
#include "stm32f10x_gpio.h"
void GPIO_SetBits(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
{
GPIOx->BSRR |= GPIO_Pin;
}
void GPIO_ResetBits(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
{
GPIOx->BRR |= GPIO_Pin;
}
void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct)
{
uint32_t currentmode = 0x00, currentpin = 0x00, pinpos = 0x00, pos = 0x00;
uint32_t tmpreg = 0x00, pinmask = 0x00;
/* Check the parameters */
/*---------------------------- GPIO Mode Configuration -----------------------*/
currentmode = ((uint32_t)GPIO_InitStruct->GPIO_Mode) & ((uint32_t)0x0F);
if ((((uint32_t)GPIO_InitStruct->GPIO_Mode) & ((uint32_t)0x10)) != 0x00)
{
/* Check the parameters */
/* Output mode */
currentmode |= (uint32_t)GPIO_InitStruct->GPIO_Speed;
}
/*---------------------------- GPIO CRL Configuration ------------------------*/
/* Configure the eight low port pins */
if (((uint32_t)GPIO_InitStruct->GPIO_Pin & ((uint32_t)0x00FF)) != 0x00)
{
tmpreg = GPIOx->CRL;
for (pinpos = 0x00; pinpos < 0x08; pinpos++)
{
pos = ((uint32_t)0x01) << pinpos;
/* Get the port pins position */
currentpin = (GPIO_InitStruct->GPIO_Pin) & pos;
if (currentpin == pos)
{
pos = pinpos << 2;
/* Clear the corresponding low control register bits */
pinmask = ((uint32_t)0x0F) << pos;
tmpreg &= ~pinmask;
/* Write the mode configuration in the corresponding bits */
tmpreg |= (currentmode << pos);
/* Reset the corresponding ODR bit */
if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPD)
{
GPIOx->BRR = (((uint32_t)0x01) << pinpos);
}
else
{
/* Set the corresponding ODR bit */
if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPU)
{
GPIOx->BSRR = (((uint32_t)0x01) << pinpos);
}
}
}
}
GPIOx->CRL = tmpreg;
}
/*---------------------------- GPIO CRH Configuration ------------------------*/
/* Configure the eight high port pins */
if (GPIO_InitStruct->GPIO_Pin > 0x00FF)
{
tmpreg = GPIOx->CRH;
for (pinpos = 0x00; pinpos < 0x08; pinpos++)
{
pos = (((uint32_t)0x01) << (pinpos + 0x08));
/* Get the port pins position */
currentpin = ((GPIO_InitStruct->GPIO_Pin) & pos);
if (currentpin == pos)
{
pos = pinpos << 2;
/* Clear the corresponding high control register bits */
pinmask = ((uint32_t)0x0F) << pos;
tmpreg &= ~pinmask;
/* Write the mode configuration in the corresponding bits */
tmpreg |= (currentmode << pos);
/* Reset the corresponding ODR bit */
if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPD)
{
GPIOx->BRR = (((uint32_t)0x01) << (pinpos + 0x08));
}
/* Set the corresponding ODR bit */
if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPU)
{
GPIOx->BSRR = (((uint32_t)0x01) << (pinpos + 0x08));
}
}
}
GPIOx->CRH = tmpreg;
}
}
stm32f10x_gpio.h
#ifndef __STM32F10X_GPIO_H
#define __STM32F10X_GPIO_H
#include "stm32f10x.h"
#define GPIO_Pin_0 ((uint16_t)0x0001)
#define GPIO_Pin_1 ((uint16_t)0x0002)
#define GPIO_Pin_2 ((uint16_t)0x0004)
#define GPIO_Pin_3 ((uint16_t)0x0008)
#define GPIO_Pin_4 ((uint16_t)0x0010)
#define GPIO_Pin_5 ((uint16_t)0x0020)
#define GPIO_Pin_6 ((uint16_t)0x0040)
#define GPIO_Pin_7 ((uint16_t)0x0080)
#define GPIO_Pin_8 ((uint16_t)0x0100)
#define GPIO_Pin_9 ((uint16_t)0x0200)
#define GPIO_Pin_10 ((uint16_t)0x0400)
#define GPIO_Pin_11 ((uint16_t)0x0800)
#define GPIO_Pin_12 ((uint16_t)0x1000)
#define GPIO_Pin_13 ((uint16_t)0x2000)
#define GPIO_Pin_14 ((uint16_t)0x4000)
#define GPIO_Pin_15 ((uint16_t)0x8000)
#define GPIO_Pin_All ((uint16_t)0xFFFF)
typedef enum
{
GPIO_Speed_10MHz = 1,
GPIO_Speed_2MHz,
GPIO_Speed_50MHz
}GPIOSpeed_TypeDef;
typedef enum
{ GPIO_Mode_AIN = 0x0, //模拟输入
GPIO_Mode_IN_FLOATING = 0x04, //浮空输入
GPIO_Mode_IPD = 0x28, //输入下拉
GPIO_Mode_IPU = 0x48, //输入上拉
GPIO_Mode_Out_OD = 0x14, //开漏输出
GPIO_Mode_Out_PP = 0x10, //推挽式输出
GPIO_Mode_AF_OD = 0x1C, //开漏复用输出
GPIO_Mode_AF_PP = 0x18 //推挽式复用输出
}GPIOMode_TypeDef;
typedef struct
{
uint16_t GPIO_Pin;
GPIOSpeed_TypeDef GPIO_Speed;
GPIOMode_TypeDef GPIO_Mode;
}GPIO_InitTypeDef;
void GPIO_SetBits(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin);
void GPIO_ResetBits(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin);
void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct);
#endif /* __STM32F10X_GPIO_H*/
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