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