mbed library sources
Fork of mbed-src by
targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/gpio_api.c
- Committer:
- mbed_official
- Date:
- 2014-01-27
- Revision:
- 76:aeb1df146756
- Child:
- 77:b5886236e6f0
File content as of revision 76:aeb1df146756:
/* mbed Microcontroller Library ******************************************************************************* * Copyright (c) 2014, 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 "gpio_api.h" #include "pinmap.h" #include "error.h" uint32_t gpio_set(PinName pin) { if (pin == NC) return 0; pin_function(pin, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF)); return (uint32_t)(1 << ((uint32_t)pin & 0xF)); // Return the pin mask } void gpio_init(gpio_t *obj, PinName pin, PinDirection direction) { GPIO_TypeDef *gpio; if (pin == NC) return; uint32_t port_index = STM_PORT(pin); // Get GPIO structure base address switch (port_index) { case PortA: gpio = (GPIO_TypeDef *)GPIOA_BASE; break; case PortB: gpio = (GPIO_TypeDef *)GPIOB_BASE; break; case PortC: gpio = (GPIO_TypeDef *)GPIOC_BASE; break; case PortD: gpio = (GPIO_TypeDef *)GPIOD_BASE; break; case PortF: gpio = (GPIO_TypeDef *)GPIOF_BASE; break; default: error("GPIO port number is not correct."); break; } // Fill GPIO object structure for future use obj->pin = pin; obj->mask = gpio_set(pin); obj->reg_in = &gpio->IDR; obj->reg_set = &gpio->BSRR; obj->reg_clr = &gpio->BRR; // Configure GPIO if (direction == PIN_OUTPUT) { pin_function(pin, STM_PIN_DATA(GPIO_Mode_OUT, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)); } else { // PIN_INPUT pin_function(pin, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF)); } } void gpio_mode(gpio_t *obj, PinMode mode) { pin_mode(obj->pin, mode); } void gpio_dir(gpio_t *obj, PinDirection direction) { if (direction == PIN_OUTPUT) { pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_OUT, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)); } else { // PIN_INPUT pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF)); } }