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Implement afio's control functions

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Steins7 2023-05-13 15:42:38 +02:00
parent 9052aac1b3
commit 3906a79315
2 changed files with 89 additions and 0 deletions
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63
drivers/afio.c Normal file
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/** @file afio.c
* Module handling Alternate Functions for Inputs/Outputs
*
* The module provides functions to remap ios to diverse peripherals
*/
//--includes--------------------------------------------------------------------
#include "afio.h"
#include "afio_regs.h"
#include "rcc.h"
//--local definitions-----------------------------------------------------------
//--local variables-------------------------------------------------------------
static volatile struct AFIO* regs = (struct AFIO*)AFIO_BASE_ADDRESS;
//--public functions------------------------------------------------------------
void afio_map_exti(enum ExtiLine line_mask, enum GpioPort port)
{
//ensure afio peripheral is enabled
rcc_enable(RCC_AHB_NONE, RCC_APB1_NONE, RCC_APB2_AFIO);
for (uint8_t i = 0; i < 4; ++i) {
if (line_mask & (0x1 << i)) {
regs->EXTICR1.word &= ~(0xF << (4 * i));
regs->EXTICR1.word |= (port << (4 * i));
}
}
line_mask = line_mask >> 4;
for (uint8_t i = 0; i < 4; ++i) {
if (line_mask & (0x1 << i)) {
regs->EXTICR2.word &= ~(0xF << (4 * i));
regs->EXTICR2.word |= (port << (4 * i));
}
}
line_mask = line_mask >> 4;
for (uint8_t i = 0; i < 4; ++i) {
if (line_mask & (0x1 << i)) {
regs->EXTICR3.word &= ~(0xF << (4 * i));
regs->EXTICR3.word |= (port << (4 * i));
}
}
line_mask = line_mask >> 4;
for (uint8_t i = 0; i < 4; ++i) {
if (line_mask & (0x1 << i)) {
regs->EXTICR4.word &= ~(0xF << (4 * i));
regs->EXTICR4.word |= (port << (4 * i));
}
}
}
//--local functions-------------------------------------------------------------

26
drivers/afio.h Normal file
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/** @file afio.h
* Module handling Alternate Functions for Inputs/Outputs
*
* The module provides functions to remap ios to diverse peripherals
*/
#ifndef _AFIO_H_
#define _AFIO_H_
//--includes--------------------------------------------------------------------
#include "stdint.h"
#include "stdbool.h"
#include "exti.h"
//--type definitions------------------------------------------------------------
//--functions-------------------------------------------------------------------
void afio_map_exti(enum ExtiLine line_mask, enum GpioPort port);
#endif //_AFIO_H_