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Copy pathhal_gpio.c
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123 lines (106 loc) · 4.18 KB
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#include <stdint.h>
#include <mk20dx128.h>
#include "teensy_hal.h"
#define GPIO_NUMBER 32
void HAL_GPIO_Init(GPIO_TypeDef *GPIOx, GPIO_InitTypeDef *GPIO_Init)
{
/* Check the parameters */
assert_param(IS_GPIO_PIN(GPIO_Init->Pin));
assert_param(IS_GPIO_MODE(GPIO_Init->Mode));
assert_param(IS_GPIO_PULL(GPIO_Init->Pull));
/* Configure the port pins */
for (uint32_t position = 0; position < GPIO_NUMBER; position++) {
uint32_t bitmask = 1 << position;
if ((GPIO_Init->Pin & bitmask) == 0) {
continue;
}
volatile uint32_t *port_pcr = GPIO_PIN_TO_PORT_PCR(GPIOx, position);
/*--------------------- GPIO Mode Configuration ------------------------*/
/* In case of Alternate function mode selection */
if ((GPIO_Init->Mode == GPIO_MODE_AF_PP) || (GPIO_Init->Mode == GPIO_MODE_AF_OD)) {
/* Check the Alternate function parameter */
assert_param(IS_GPIO_AF(GPIO_Init->Alternate));
}
else if (GPIO_Init->Mode == GPIO_MODE_ANALOG) {
GPIO_Init->Alternate = 0;
}
else {
GPIO_Init->Alternate = 1;
}
/* Configure Alternate function mapped with the current IO */
*port_pcr &= ~PORT_PCR_MUX_MASK;
*port_pcr |= PORT_PCR_MUX(GPIO_Init->Alternate);
/* Configure IO Direction mode (Input, Output, Alternate or Analog) */
if (GPIO_Init->Mode == GPIO_MODE_INPUT || GPIO_Init->Mode == GPIO_MODE_ANALOG) {
GPIOx->PDDR &= ~bitmask;
} else {
GPIOx->PDDR |= bitmask;
}
/* In case of Output or Alternate function mode selection */
if ((GPIO_Init->Mode == GPIO_MODE_OUTPUT_PP) || (GPIO_Init->Mode == GPIO_MODE_AF_PP) ||
(GPIO_Init->Mode == GPIO_MODE_OUTPUT_OD) || (GPIO_Init->Mode == GPIO_MODE_AF_OD)) {
/* Check the Speed parameter */
assert_param(IS_GPIO_SPEED(GPIO_Init->Speed));
*port_pcr |= PORT_PCR_DSE;
/* Configure the IO Speed */
if (GPIO_Init->Speed > GPIO_SPEED_MEDIUM) {
*port_pcr &= ~PORT_PCR_SRE;
} else {
*port_pcr |= PORT_PCR_SRE;
}
/* Configure the IO Output Type */
if (GPIO_Init->Mode & GPIO_OUTPUT_TYPE) {
*port_pcr |= PORT_PCR_ODE; // OD
} else {
*port_pcr &= ~PORT_PCR_ODE; // PP
}
} else {
*port_pcr &= ~PORT_PCR_DSE;
}
/* Activate the Pull-up or Pull down resistor for the current IO */
if (GPIO_Init->Pull == GPIO_NOPULL) {
*port_pcr &= ~PORT_PCR_PE;
} else {
*port_pcr |= PORT_PCR_PE;
if (GPIO_Init->Pull == GPIO_PULLDOWN) {
*port_pcr &= ~PORT_PCR_PS;
} else {
*port_pcr |= PORT_PCR_PS;
}
}
#if 0
/*--------------------- EXTI Mode Configuration ------------------------*/
/* Configure the External Interrupt or event for the current IO */
if((GPIO_Init->Mode & EXTI_MODE) == EXTI_MODE)
{
/* Enable SYSCFG Clock */
__SYSCFG_CLK_ENABLE();
temp = ((uint32_t)0x0F) << (4 * (position & 0x03));
SYSCFG->EXTICR[position >> 2] &= ~temp;
SYSCFG->EXTICR[position >> 2] |= ((uint32_t)(__HAL_GET_GPIO_SOURCE(GPIOx)) << (4 * (position & 0x03)));
/* Clear EXTI line configuration */
EXTI->IMR &= ~((uint32_t)iocurrent);
EXTI->EMR &= ~((uint32_t)iocurrent);
if((GPIO_Init->Mode & GPIO_MODE_IT) == GPIO_MODE_IT)
{
EXTI->IMR |= iocurrent;
}
if((GPIO_Init->Mode & GPIO_MODE_EVT) == GPIO_MODE_EVT)
{
EXTI->EMR |= iocurrent;
}
/* Clear Rising Falling edge configuration */
EXTI->RTSR &= ~((uint32_t)iocurrent);
EXTI->FTSR &= ~((uint32_t)iocurrent);
if((GPIO_Init->Mode & RISING_EDGE) == RISING_EDGE)
{
EXTI->RTSR |= iocurrent;
}
if((GPIO_Init->Mode & FALLING_EDGE) == FALLING_EDGE)
{
EXTI->FTSR |= iocurrent;
}
}
#endif
}
}