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bsp_gpio.cpp
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bsp_gpio.cpp
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/*
* bsp-nucleo-f103, a generic bsp for nucleo f103rb based projects.
*
* Copyright (C) 2020 Julian Friedrich
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* You can file issues at https://github.com/fjulian79/bsp-stm32-f103.git
*/
#include <bsp/bsp_gpio.h>
/**
* @brief Derives the gpio port from the bsp gipo pin ID.
*/
#define BSP_IOMAPPORT(_val) ((GPIO_TypeDef *) (APB2PERIPH_BASE + (((uint32_t)_val) >> 16)))
/**
* @brief Derives the bit mask for enabling the gpio clock from the bsp gpio
* pin ID.
*/
#define BSP_IOMAPPEN(_val) (0x1 << (((uint32_t)_val) >> 26))
/**
* @brief Derives the bit mask for accessing the gpio pin from the bsp gpio
* pin ID.
*/
#define BSP_IOMAPPIN(_val) (((uint32_t)_val) & 0xFFFF)
void bspGpioPinInit(bspGpioPin_t pin, LL_GPIO_InitTypeDef *init)
{
__IO uint32_t tmp = BSP_IOMAPPEN(pin);
SET_BIT(RCC->APB2ENR, tmp);
tmp = READ_BIT(RCC->APB2ENR, tmp);
tmp = BSP_IOMAPPIN(pin);
init->Pin = tmp << 8;
if (init->Pin < 0x10000)
init->Pin |= tmp;
else
init->Pin |= (0x04000000 | (tmp >> 8));
LL_GPIO_Init(BSP_IOMAPPORT(pin), init);
}
void bspGpioInit(void)
{
LL_GPIO_InitTypeDef init;
/* LED */
init.Mode = LL_GPIO_MODE_OUTPUT;
init.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
init.Pull = LL_GPIO_PULL_DOWN;
init.Speed = LL_GPIO_SPEED_FREQ_MEDIUM;
bspGpioPinInit(BSP_GPIO_LED, &init);
/* Button */
init.Mode = LL_GPIO_MODE_INPUT;
init.Pull = LL_GPIO_PULL_DOWN;
bspGpioPinInit(BSP_GPIO_BUTTON, &init);
/* TTY */
init.Mode = LL_GPIO_MODE_ALTERNATE;
init.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
init.Pull = LL_GPIO_PULL_UP;
init.Speed = LL_GPIO_SPEED_FREQ_HIGH;
bspGpioPinInit(BSP_GPIO_TTY_TX, &init);
init.Mode = LL_GPIO_MODE_FLOATING;
bspGpioPinInit(BSP_GPIO_TTY_RX, &init);
}
void bspGpioSet(bspGpioPin_t pin)
{
GPIO_TypeDef *GPIOx = BSP_IOMAPPORT(pin);
uint16_t GPIO_Pin = BSP_IOMAPPIN(pin);
WRITE_REG(GPIOx->BSRR, GPIO_Pin);
}
void bspGpioClear(bspGpioPin_t pin)
{
GPIO_TypeDef *GPIOx = BSP_IOMAPPORT(pin);
uint16_t GPIO_Pin = BSP_IOMAPPIN(pin);
WRITE_REG(GPIOx->BRR, GPIO_Pin);
}
void bspGpioToggle(bspGpioPin_t pin)
{
GPIO_TypeDef *GPIOx = BSP_IOMAPPORT(pin);
uint16_t GPIO_Pin = BSP_IOMAPPIN(pin);
WRITE_REG(GPIOx->ODR, READ_REG(GPIOx->ODR) ^ GPIO_Pin);
}
void bspGpioWrite(bspGpioPin_t pin, uint32_t val)
{
if (val != 0)
bspGpioSet(pin);
else
bspGpioClear(pin);
}
bool bspGpioRead(bspGpioPin_t pin)
{
return false;
}