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