mbed library sources
Dependents: frdm_kl05z_gpio_test
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Diff: targets/hal/TARGET_STM/TARGET_STM32F4XX/pinmap.c
- Revision:
- 20:4263a77256ae
- Child:
- 227:7bd0639b8911
diff -r 398f4c622e1b -r 4263a77256ae targets/hal/TARGET_STM/TARGET_STM32F4XX/pinmap.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/hal/TARGET_STM/TARGET_STM32F4XX/pinmap.c Tue Sep 10 15:14:19 2013 +0300 @@ -0,0 +1,73 @@ +/* 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 "pinmap.h" +#include "error.h" + +/** + * Set the pin into input, output, alternate function or analog mode + */ +void pin_function(PinName pin, int data) { + if (pin == (uint32_t)NC) return; + + int mode = STM_PIN_MODE(data); + int func = STM_PIN_FUNC(data); + + uint32_t pin_number = (uint32_t)pin; + int port_index = pin_number >> 4; + int pin_index = (pin_number & 0xF); + GPIO_TypeDef * gpio = ((GPIO_TypeDef *) (GPIOA_BASE + (port_index << 10))); + + // MODE + int offset = pin_index << 1; + gpio->MODER &= ~(0x3 << offset); + gpio->MODER |= mode << offset; + + // Set high-speed mode + gpio->OSPEEDR &= ~(0x3 << offset); + gpio->OSPEEDR |= (0x2 << offset); + + // FUNCTION + // Bottom seven pins are in AFR[0], top seven in AFR[1] + offset = (pin_index & 0x7) << 2; + if (pin_index <= 0x7) { + gpio->AFR[0] &= ~(0xF << offset); + gpio->AFR[0] |= func << offset; + } + else { + gpio->AFR[1] &= ~(0xF << offset); + gpio->AFR[1] |= func << offset; + } +} + +void pin_mode(PinName pin, PinMode mode) { + if (pin == (uint32_t)NC) { return; } + + uint32_t pin_number = (uint32_t)pin; + int port_index = pin_number >> 4; + int pin_index = (pin_number & 0xF); + int offset = pin_index << 1; + + GPIO_TypeDef * gpio = ((GPIO_TypeDef *) (GPIOA_BASE + (port_index << 10))); + if (mode == OpenDrain) { + gpio->OTYPER |= 1 << pin_index; + } + else { + gpio->OTYPER &= ~(1 << pin_index); + gpio->PUPDR &= ~(0x3 << offset); + gpio->PUPDR |= mode << offset; + } +} +