mbed library sources
Dependents: frdm_kl05z_gpio_test
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Diff: targets/hal/TARGET_STM/TARGET_STM32F4XX/gpio_api.c
- Revision:
- 20:4263a77256ae
- Child:
- 113:65a335a675de
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/hal/TARGET_STM/TARGET_STM32F4XX/gpio_api.c Tue Sep 10 15:14:19 2013 +0300 @@ -0,0 +1,61 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 ARM Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#include "gpio_api.h" +#include "pinmap.h" + +uint32_t gpio_set(PinName pin) { + uint32_t port_index = (uint32_t) pin >> 4; + + // Enable GPIO peripheral clock + RCC->AHB1ENR |= 1 << port_index; + + pin_function(pin, STM_PIN_DATA(0, 0)); + return 1 << ((uint32_t) pin & 0xF); +} + +void gpio_init(gpio_t *obj, PinName pin, PinDirection direction) { + if(pin == NC) return; + + obj->pin = pin; + obj->mask = gpio_set(pin); + + uint32_t port_index = (uint32_t) pin >> 4; + + GPIO_TypeDef *port_reg = (GPIO_TypeDef *) (GPIOA_BASE + (port_index << 10)); + obj->reg_mode = &port_reg->MODER; + obj->reg_set = &port_reg->BSRRL; + obj->reg_clr = &port_reg->BSRRH; + obj->reg_in = &port_reg->IDR; + + + gpio_dir(obj, direction); + + switch (direction) { + case PIN_OUTPUT: pin_mode(pin, PullNone); break; + case PIN_INPUT : pin_mode(pin, PullDown); break; + } +} + +void gpio_mode(gpio_t *obj, PinMode mode) { + pin_mode(obj->pin, mode); +} + +void gpio_dir(gpio_t *obj, PinDirection direction) { + switch (direction) { + case PIN_INPUT : pin_function(obj->pin, STM_PIN_DATA(0, 0)); break; + case PIN_OUTPUT: pin_function(obj->pin, STM_PIN_DATA(1, 0)); break; + } +}