83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
#include "stm32f10x.h"
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#include <stdlib.h>
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int ChercherEtat(GPIO_TypeDef * GPIO, int pin){
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return((GPIO -> IDR & (0x01 << pin)));
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}
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void ResetBroche(uint32_t GPIO, int Broche){
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GPIO -> BSRR |= BSBroche;
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}
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void SetBroche(uint32_t GPIO, int Broche){
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GPIO -> BSRR |= BSBroche << 16;
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}
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void ConfigureGPIO(uint32_t GPIO, int Broche, int IO, char Mode){
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RCC->APB2ENR |= RCC_APB2ENR_IOPAEN; // Clock GPIOA enable
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if (Broche < 8) {
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GPIO -> CRL &= ~(0x1 << Broche *4) & ~(0x1 << Broche *4 +1) & ~(0x1 << Broche *4 + 2) & ~(0x1 << Broche *4 + 3); // Clean bits
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if (IO == 0){ //Input
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if (strcmp(Mode,"Floating")) {
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GPIO -> CRL |= (0x1 << Broche *4) | (0x1 << Broche * 4 + 1);
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}
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else if (strcmp(Mode,"Pull-Up") || strcmp(Mode,"Pull-Down")){
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GPIO -> CRL |= (0x1 << 6*4 + 1);
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}
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else {
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}
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}
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else if ( IO < 5) { // Output
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GPIO -> CRL |= (0xIO << Broche * 4 + 2); // Frequency mode
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if (strcmp(Mode, "Open-Drain")){
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GPIO -> CRL |= (0x1 << Broche *4);
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}
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else if (strcmp(Mode, "Push-Pull Alterne")){
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GPIO -> CRL |= (0x1 << Broche *4 + 1);
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RCC->APB2ENR |= RCC_APB2ENR_AFIOEN; // Alternate Function I/O clock enable GPIOA
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}
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else if (strcmp(Mode, "Open-Drain Alterne")){
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GPIO -> CRL |= (0x1 << Broche * 4) | (0x1 << Broche * 4 + 1);
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}
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else {
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}
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}
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else{
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return;
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}
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}
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else if (Broche < 16) {
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GPIO -> CRH &= ~(0x1 << Broche *4) & ~(0x1 << Broche *4 +1) & ~(0x1 << Broche *4 + 2) & ~(0x1 << Broche *4 + 3); // Clean bits
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if (IO == 0){ //Input
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if (strcmp(Mode,"Floating")) {
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GPIO -> CRH |= (0x1 << Broche *4) | (0x1 << Broche * 4 + 1);
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}
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else if (strcmp(Mode,"Pull-Up") || strcmp(Mode,"Pull-Down")){
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GPIO -> CRH |= (0x1 << 6*4 + 1);
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}
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else {
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}
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}
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else if ( IO < 5) { // Output
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GPIO -> CRH |= (0xIO << Broche * 4 + 2); // Frequency mode
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if (strcmp(Mode, "Open-Drain")){
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GPIO -> CRH |= (0x1 << Broche *4);
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}
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else if (strcmp(Mode, "Push-Pull Alterne")){
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GPIO -> CRH |= (0x1 << Broche *4 + 1);
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}
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else if (strcmp(Mode, "Open-Drain Alterne")){
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GPIO -> CRH |= (0x1 << Broche * 4) | (0x1 << Broche * 4 + 1);
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}
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else {
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}
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}
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else{
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return; // IO invalid
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}
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}
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else{
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return; // Pin number invalid
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}
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}
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