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stm32f103xx_gpio.c
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stm32f103xx_gpio.c
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#include<stdint.h>
#include "stm32f10x.h"
#include "stm32f103xx_gpio.h"
void GPIO_PeriClockControl(GPIO_TypeDef *pGPIOx , uint8_t EnorDi)
{
if(EnorDi == ENABLE)
{
if(pGPIOx == GPIOA)
{
RCC->APB2ENR |=(1<<2);
}
if(pGPIOx == GPIOB)
{
RCC->APB2ENR |=(1<<3);
}
if(pGPIOx == GPIOC)
{
RCC->APB2ENR |=(1<<4);
}
if(pGPIOx == GPIOD)
{
RCC->APB2ENR |=(1<<5);
}
if(pGPIOx == GPIOE)
{
RCC->APB2ENR |=(1<<6);
}
if(pGPIOx == GPIOF)
{
RCC->APB2ENR |=(1<<7);
}
if(pGPIOx == GPIOG)
{
RCC->APB2ENR |=(1<<8);
}
}
else if(EnorDi == DISABLE)
{
if(pGPIOx == GPIOA)
{
RCC->APB2ENR &= ~(1<<2);
}
if(pGPIOx == GPIOB)
{
RCC->APB2ENR &= ~(1<<3);
}
if(pGPIOx == GPIOC)
{
RCC->APB2ENR &= ~(1<<4);
}
if(pGPIOx == GPIOD)
{
RCC->APB2ENR &= ~(1<<5);
}
if(pGPIOx == GPIOE)
{
RCC->APB2ENR &= ~(1<<6);
}
if(pGPIOx == GPIOF)
{
RCC->APB2ENR &= ~(1<<7);
}
if(pGPIOx == GPIOG)
{
RCC->APB2ENR &= ~(1<<8);
}
}
}
void GPIO_Init(GPIO_Handle_t *pGPIOHandle)
{
if(pGPIOHandle->GPIO_PinConfig.GPIO_ModeInOut <= 3)
{
uint32_t temp1 , temp2;
temp1 = pGPIOHandle->GPIO_PinConfig.GPIO_PinNumber / 8;
temp2 = pGPIOHandle->GPIO_PinConfig.GPIO_PinNumber % 8;
if(temp1 == 0)
{
pGPIOHandle->pGPIOx->CRL &= ~(0xF<<(temp2*4));
pGPIOHandle->pGPIOx->CRL |= (pGPIOHandle->GPIO_PinConfig.GPIO_ModeInOut<<(temp2*4));
pGPIOHandle->pGPIOx->CRL |= (pGPIOHandle->GPIO_PinConfig.GPIO_PinMode<<((temp2*4)+2));
}
else
{
pGPIOHandle->pGPIOx->CRH &= ~(0xF<<(temp2*4));
pGPIOHandle->pGPIOx->CRH |= (pGPIOHandle->GPIO_PinConfig.GPIO_ModeInOut<<(temp2*4));
pGPIOHandle->pGPIOx->CRH |= (pGPIOHandle->GPIO_PinConfig.GPIO_PinMode<<((temp2*4)+2));
}
}
else if(pGPIOHandle->GPIO_PinConfig.GPIO_ModeInOut > 3)
{
RCC->APB2ENR |= (1<<0);
EXTI->IMR |= (1<<pGPIOHandle->GPIO_PinConfig.GPIO_PinNumber);
if(pGPIOHandle->GPIO_PinConfig.GPIO_ModeInOut == GPIO_MODE_IT_FT)
{
EXTI->FTSR |= (1<<pGPIOHandle->GPIO_PinConfig.GPIO_PinNumber);
EXTI->RTSR &= ~(1<<pGPIOHandle->GPIO_PinConfig.GPIO_PinNumber);
}
else if(pGPIOHandle->GPIO_PinConfig.GPIO_ModeInOut == GPIO_MODE_IT_RT)
{
EXTI->RTSR |= (1<<pGPIOHandle->GPIO_PinConfig.GPIO_PinNumber);
EXTI->FTSR &= ~(1<<pGPIOHandle->GPIO_PinConfig.GPIO_PinNumber);
}
else if(pGPIOHandle->GPIO_PinConfig.GPIO_ModeInOut == GPIO_MODE_IT_RFT)
{
EXTI->FTSR |= (1<<pGPIOHandle->GPIO_PinConfig.GPIO_PinNumber);
EXTI->RTSR |= (1<<pGPIOHandle->GPIO_PinConfig.GPIO_PinNumber);
}
uint8_t var1 =0 , var2 =0;
var1 = pGPIOHandle->GPIO_PinConfig.GPIO_PinNumber/4;
var2 = pGPIOHandle->GPIO_PinConfig.GPIO_PinNumber%4;
uint8_t portcode = GPIO_BASEADDR_TO_CODE(pGPIOHandle->pGPIOx);
AFIO->EXTICR[var1] |= (portcode<<(var2*4));
}
}
void GPIO_IRQ_Interrupt_ENConfig(uint8_t IRQNumber, uint8_t EnorDi)
{
if(EnorDi == ENABLE)
{
NVIC_EnableIRQ(IRQNumber);
}
else
{
NVIC_DisableIRQ(IRQNumber);
}
}
void GPIO_IRQ_PR_Config(uint8_t IRQNumber, uint8_t IRQ_Priority)
{
NVIC_SetPriority(IRQNumber,IRQ_Priority);
}
void GPIO_IRQHandling(uint8_t PinNumber)
{
if(EXTI->PR & (1<<PinNumber))
{
EXTI->PR |= (1<<PinNumber);
}
}