80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
#include "stm32f10x.h"
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#define In_Floating 0x4
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#define In_PullDown 0x8
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#define In_PullUp 0x8
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#define In_Analog 0x0
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#define Out_Ppull 0x3
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#define Out_OD 0x7
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#define AltOut_Ppull 0xB
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#define AltOut_OD 0xF
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void MyGPIO_Init(GPIO_TypeDef * GPIO, char pin, char conf ){
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int shift_pin;
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//Start clock
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if(GPIO == GPIOA){
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RCC -> APB2ENR |= RCC_APB2ENR_IOPAEN;
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}
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else if(GPIO == GPIOB){
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RCC -> APB2ENR |= RCC_APB2ENR_IOPBEN;
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}
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else if(GPIO == GPIOC){
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RCC -> APB2ENR |= RCC_APB2ENR_IOPCEN;
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}
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else if(GPIO == GPIOD){
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RCC -> APB2ENR |= RCC_APB2ENR_IOPDEN;
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}
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if(pin < 8){//CRL zone
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shift_pin = pin*4;
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GPIO -> CRL &= ~(0xF << shift_pin);
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//PullUp and PullDown have the same conf number, so we need to change the ODR to diferenciate them both
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if(conf == In_PullUp){
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GPIO -> CRL |= ( In_PullUp << shift_pin);
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GPIO -> ODR |= (1<<pin);
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}
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else if(conf == In_PullDown){
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GPIO -> CRL |= ( In_PullDown << shift_pin);
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GPIO -> ODR &= ~(1<<pin);
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}
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else{
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GPIO -> CRL |= ( conf << shift_pin);
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}
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}
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else{//CRH zone
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shift_pin = (pin-8)*4;
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GPIO -> CRH &= ~(0xF << shift_pin);
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if(conf == In_PullUp){
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GPIO -> CRH |= ( In_PullUp << shift_pin);
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GPIO -> ODR |= (1<<pin);
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}
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else if(conf == In_PullDown){
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GPIO -> CRH |= ( In_PullDown << shift_pin);
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GPIO -> ODR &= ~(1<<pin);
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}
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else{
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GPIO -> CRH |= ( conf << shift_pin);
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}
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}
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}
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int MyGPIO_Read(GPIO_TypeDef * GPIO, char GPIO_Pin){
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if(GPIO -> IDR & (1 << GPIO_Pin)){
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return 1;
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}
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else{
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return 0;
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}
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}
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void MyGPIO_Set(GPIO_TypeDef * GPIO, char GPIO_Pin){
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GPIO -> BSRR = (1<<GPIO_Pin);//1 on set zone
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}
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void MyGPIO_Reset(GPIO_TypeDef * GPIO, char GPIO_Pin){
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GPIO -> BSRR = (1<<(GPIO_Pin+16));//1 on reset zone
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}
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void MyGPIO_Toggle(GPIO_TypeDef * GPIO, char GPIO_Pin){
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if((GPIO-> ODR & (1<<GPIO_Pin)) != 0){
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GPIO -> BSRR = (1<<(GPIO_Pin+16));
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}
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else{
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GPIO -> BSRR = (1<<GPIO_Pin);
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}
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}
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