lzbp li / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_STM32F4XX/pinmap.c@251:de9a1e4ffd79, 2014-07-08 (annotated)

Committer:
mbed_official
Date:
Tue Jul 08 14:15:07 2014 +0100
Revision:
251:de9a1e4ffd79
Parent:
250:a49055e7a707
Child:
285:31249416b6f9
Synchronized with git revision b0ac1e3485a9aa1cb98d1ca68df9d1cdbcd6ce63



Full URL: https://github.com/mbedmicro/mbed/commit/b0ac1e3485a9aa1cb98d1ca68df9d1cdbcd6ce63/



Revert "error.h -> mbed_error.h"

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 20:4263a77256ae 1 /* mbed Microcontroller Library
bogdanm 20:4263a77256ae 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 20:4263a77256ae 3 *
bogdanm 20:4263a77256ae 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 20:4263a77256ae 5 * you may not use this file except in compliance with the License.
bogdanm 20:4263a77256ae 6 * You may obtain a copy of the License at
bogdanm 20:4263a77256ae 7 *
bogdanm 20:4263a77256ae 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 20:4263a77256ae 9 *
bogdanm 20:4263a77256ae 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 20:4263a77256ae 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 20:4263a77256ae 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 20:4263a77256ae 13 * See the License for the specific language governing permissions and
bogdanm 20:4263a77256ae 14 * limitations under the License.
bogdanm 20:4263a77256ae 15 */
mbed_official 227:7bd0639b8911 16 #include "mbed_assert.h"
bogdanm 20:4263a77256ae 17 #include "pinmap.h"
mbed_official 251:de9a1e4ffd79 18 #include "error.h"
bogdanm 20:4263a77256ae 19
bogdanm 20:4263a77256ae 20 /**
bogdanm 20:4263a77256ae 21 * Set the pin into input, output, alternate function or analog mode
bogdanm 20:4263a77256ae 22 */
bogdanm 20:4263a77256ae 23 void pin_function(PinName pin, int data) {
mbed_official 227:7bd0639b8911 24 MBED_ASSERT(pin != (PinName)NC);
bogdanm 20:4263a77256ae 25
bogdanm 20:4263a77256ae 26 int mode = STM_PIN_MODE(data);
bogdanm 20:4263a77256ae 27 int func = STM_PIN_FUNC(data);
bogdanm 20:4263a77256ae 28
bogdanm 20:4263a77256ae 29 uint32_t pin_number = (uint32_t)pin;
bogdanm 20:4263a77256ae 30 int port_index = pin_number >> 4;
bogdanm 20:4263a77256ae 31 int pin_index = (pin_number & 0xF);
bogdanm 20:4263a77256ae 32 GPIO_TypeDef * gpio = ((GPIO_TypeDef *) (GPIOA_BASE + (port_index << 10)));
bogdanm 20:4263a77256ae 33
bogdanm 20:4263a77256ae 34 // MODE
bogdanm 20:4263a77256ae 35 int offset = pin_index << 1;
bogdanm 20:4263a77256ae 36 gpio->MODER &= ~(0x3 << offset);
bogdanm 20:4263a77256ae 37 gpio->MODER |= mode << offset;
bogdanm 20:4263a77256ae 38
bogdanm 20:4263a77256ae 39 // Set high-speed mode
bogdanm 20:4263a77256ae 40 gpio->OSPEEDR &= ~(0x3 << offset);
bogdanm 20:4263a77256ae 41 gpio->OSPEEDR |= (0x2 << offset);
bogdanm 20:4263a77256ae 42
bogdanm 20:4263a77256ae 43 // FUNCTION
bogdanm 20:4263a77256ae 44 // Bottom seven pins are in AFR[0], top seven in AFR[1]
bogdanm 20:4263a77256ae 45 offset = (pin_index & 0x7) << 2;
bogdanm 20:4263a77256ae 46 if (pin_index <= 0x7) {
bogdanm 20:4263a77256ae 47 gpio->AFR[0] &= ~(0xF << offset);
bogdanm 20:4263a77256ae 48 gpio->AFR[0] |= func << offset;
bogdanm 20:4263a77256ae 49 }
bogdanm 20:4263a77256ae 50 else {
bogdanm 20:4263a77256ae 51 gpio->AFR[1] &= ~(0xF << offset);
bogdanm 20:4263a77256ae 52 gpio->AFR[1] |= func << offset;
bogdanm 20:4263a77256ae 53 }
bogdanm 20:4263a77256ae 54 }
bogdanm 20:4263a77256ae 55
bogdanm 20:4263a77256ae 56 void pin_mode(PinName pin, PinMode mode) {
mbed_official 227:7bd0639b8911 57 MBED_ASSERT(pin != (PinName)NC);
bogdanm 20:4263a77256ae 58
bogdanm 20:4263a77256ae 59 uint32_t pin_number = (uint32_t)pin;
bogdanm 20:4263a77256ae 60 int port_index = pin_number >> 4;
bogdanm 20:4263a77256ae 61 int pin_index = (pin_number & 0xF);
bogdanm 20:4263a77256ae 62 int offset = pin_index << 1;
bogdanm 20:4263a77256ae 63
bogdanm 20:4263a77256ae 64 GPIO_TypeDef * gpio = ((GPIO_TypeDef *) (GPIOA_BASE + (port_index << 10)));
bogdanm 20:4263a77256ae 65 if (mode == OpenDrain) {
bogdanm 20:4263a77256ae 66 gpio->OTYPER |= 1 << pin_index;
bogdanm 20:4263a77256ae 67 }
bogdanm 20:4263a77256ae 68 else {
bogdanm 20:4263a77256ae 69 gpio->OTYPER &= ~(1 << pin_index);
bogdanm 20:4263a77256ae 70 gpio->PUPDR &= ~(0x3 << offset);
bogdanm 20:4263a77256ae 71 gpio->PUPDR |= mode << offset;
bogdanm 20:4263a77256ae 72 }
bogdanm 20:4263a77256ae 73 }
bogdanm 20:4263a77256ae 74