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- /* mbed Microcontroller Library
- *******************************************************************************
- * Copyright (c) 2015, STMicroelectronics
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- * 3. Neither the name of STMicroelectronics nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *******************************************************************************
- */
- #include "mbed_assert.h"
- #include "gpio_api.h"
- #include "pinmap.h"
- #include "mbed_error.h"
- #include "pin_device.h"
- extern const uint32_t ll_pin_defines[16];
- // Enable GPIO clock and return GPIO base address
- GPIO_TypeDef *Set_GPIO_Clock(uint32_t port_idx)
- {
- uint32_t gpio_add = 0;
- switch (port_idx) {
- case PortA:
- gpio_add = GPIOA_BASE;
- __HAL_RCC_GPIOA_CLK_ENABLE();
- break;
- case PortB:
- gpio_add = GPIOB_BASE;
- __HAL_RCC_GPIOB_CLK_ENABLE();
- break;
- #if defined(GPIOC_BASE)
- case PortC:
- gpio_add = GPIOC_BASE;
- __HAL_RCC_GPIOC_CLK_ENABLE();
- break;
- #endif
- #if defined GPIOD_BASE
- case PortD:
- gpio_add = GPIOD_BASE;
- __HAL_RCC_GPIOD_CLK_ENABLE();
- break;
- #endif
- #if defined GPIOE_BASE
- case PortE:
- gpio_add = GPIOE_BASE;
- __HAL_RCC_GPIOE_CLK_ENABLE();
- break;
- #endif
- #if defined GPIOF_BASE
- case PortF:
- gpio_add = GPIOF_BASE;
- __HAL_RCC_GPIOF_CLK_ENABLE();
- break;
- #endif
- #if defined GPIOG_BASE
- case PortG:
- #if defined TARGET_STM32L4
- __HAL_RCC_PWR_CLK_ENABLE();
- HAL_PWREx_EnableVddIO2();
- #endif
- gpio_add = GPIOG_BASE;
- __HAL_RCC_GPIOG_CLK_ENABLE();
- break;
- #endif
- #if defined GPIOH_BASE
- case PortH:
- gpio_add = GPIOH_BASE;
- __HAL_RCC_GPIOH_CLK_ENABLE();
- break;
- #endif
- #if defined GPIOI_BASE
- case PortI:
- gpio_add = GPIOI_BASE;
- __HAL_RCC_GPIOI_CLK_ENABLE();
- break;
- #endif
- #if defined GPIOJ_BASE
- case PortJ:
- gpio_add = GPIOJ_BASE;
- __HAL_RCC_GPIOJ_CLK_ENABLE();
- break;
- #endif
- #if defined GPIOK_BASE
- case PortK:
- gpio_add = GPIOK_BASE;
- __HAL_RCC_GPIOK_CLK_ENABLE();
- break;
- #endif
- default:
- error("Pinmap error: wrong port number.");
- break;
- }
- return (GPIO_TypeDef *) gpio_add;
- }
- uint32_t gpio_set(PinName pin)
- {
- MBED_ASSERT(pin != (PinName)NC);
- pin_function(pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
- return (uint32_t)(1 << ((uint32_t)pin & 0xF)); // Return the pin mask
- }
- void gpio_init(gpio_t *obj, PinName pin)
- {
- obj->pin = pin;
- if (pin == (PinName)NC) {
- return;
- }
- uint32_t port_index = STM_PORT(pin);
- // Enable GPIO clock
- GPIO_TypeDef *gpio = Set_GPIO_Clock(port_index);
- // Fill GPIO object structure for future use
- obj->mask = gpio_set(pin);
- obj->gpio = gpio;
- obj->ll_pin = ll_pin_defines[STM_PIN(obj->pin)];
- obj->reg_in = &gpio->IDR;
- obj->reg_set = &gpio->BSRR;
- #ifdef GPIO_IP_WITHOUT_BRR
- obj->reg_clr = &gpio->BSRR;
- #else
- obj->reg_clr = &gpio->BRR;
- #endif
- }
- void gpio_mode(gpio_t *obj, PinMode mode)
- {
- pin_mode(obj->pin, mode);
- }
- inline void gpio_dir(gpio_t *obj, PinDirection direction)
- {
- if (direction == PIN_INPUT) {
- LL_GPIO_SetPinMode(obj->gpio, obj->ll_pin, LL_GPIO_MODE_INPUT);
- } else {
- LL_GPIO_SetPinMode(obj->gpio, obj->ll_pin, LL_GPIO_MODE_OUTPUT);
- }
- }
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