mbed library sources
Dependents: Freedman_v2 Nucleo_i2c_OLED_BME280_copy
Fork of mbed-src by
targets/hal/TARGET_STM/TARGET_STM32F4XX/pinmap.c
- Committer:
- mbed_official
- Date:
- 2014-07-08
- Revision:
- 251:de9a1e4ffd79
- Parent:
- 250:a49055e7a707
- Child:
- 285:31249416b6f9
File content as of revision 251:de9a1e4ffd79:
/* 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 "mbed_assert.h" #include "pinmap.h" #include "error.h" /** * Set the pin into input, output, alternate function or analog mode */ void pin_function(PinName pin, int data) { MBED_ASSERT(pin != (PinName)NC); 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) { MBED_ASSERT(pin != (PinName)NC); 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; } }