Aravind Vadali / mbed-src-AV

mbed.h library with any bug fixes AV finds.

Dependents:   micromouse4_encoder_testing PID_Test Lab1_Test WorkingPID ... more

targets/hal/TARGET_STM/TARGET_STM32F4XX/pinmap.c@1:ebce2ad32f95, 2015-11-02 (annotated)

Committer:
aravindsv
Date:
Mon Nov 02 03:07:12 2015 +0000
Revision:
1:ebce2ad32f95
Parent:
0:ba7650f404af 
Changed the RCC timeout value to 500 ms, so total code startup time before program starts running is ~1s. Hopefully no side-effects from lower startup timeouts

Who changed what in which revision?

UserRevisionLine numberNew contents of line
aravindsv 0:ba7650f404af 1 /* mbed Microcontroller Library
aravindsv 0:ba7650f404af 2 * Copyright (c) 2006-2013 ARM Limited
aravindsv 0:ba7650f404af 3 *
aravindsv 0:ba7650f404af 4 * Licensed under the Apache License, Version 2.0 (the "License");
aravindsv 0:ba7650f404af 5 * you may not use this file except in compliance with the License.
aravindsv 0:ba7650f404af 6 * You may obtain a copy of the License at
aravindsv 0:ba7650f404af 7 *
aravindsv 0:ba7650f404af 8 * http://www.apache.org/licenses/LICENSE-2.0
aravindsv 0:ba7650f404af 9 *
aravindsv 0:ba7650f404af 10 * Unless required by applicable law or agreed to in writing, software
aravindsv 0:ba7650f404af 11 * distributed under the License is distributed on an "AS IS" BASIS,
aravindsv 0:ba7650f404af 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
aravindsv 0:ba7650f404af 13 * See the License for the specific language governing permissions and
aravindsv 0:ba7650f404af 14 * limitations under the License.
aravindsv 0:ba7650f404af 15 */
aravindsv 0:ba7650f404af 16 #include "mbed_assert.h"
aravindsv 0:ba7650f404af 17 #include "pinmap.h"
aravindsv 0:ba7650f404af 18 #include "mbed_error.h"
aravindsv 0:ba7650f404af 19
aravindsv 0:ba7650f404af 20 /**
aravindsv 0:ba7650f404af 21 * Set the pin into input, output, alternate function or analog mode
aravindsv 0:ba7650f404af 22 */
aravindsv 0:ba7650f404af 23 void pin_function(PinName pin, int data) {
aravindsv 0:ba7650f404af 24 MBED_ASSERT(pin != (PinName)NC);
aravindsv 0:ba7650f404af 25
aravindsv 0:ba7650f404af 26 int mode = STM_PIN_MODE(data);
aravindsv 0:ba7650f404af 27 int func = STM_PIN_FUNC(data);
aravindsv 0:ba7650f404af 28
aravindsv 0:ba7650f404af 29 uint32_t pin_number = (uint32_t)pin;
aravindsv 0:ba7650f404af 30 int port_index = pin_number >> 4;
aravindsv 0:ba7650f404af 31 int pin_index = (pin_number & 0xF);
aravindsv 0:ba7650f404af 32 GPIO_TypeDef * gpio = ((GPIO_TypeDef *) (GPIOA_BASE + (port_index << 10)));
aravindsv 0:ba7650f404af 33
aravindsv 0:ba7650f404af 34 // MODE
aravindsv 0:ba7650f404af 35 int offset = pin_index << 1;
aravindsv 0:ba7650f404af 36 gpio->MODER &= ~(0x3 << offset);
aravindsv 0:ba7650f404af 37 gpio->MODER |= mode << offset;
aravindsv 0:ba7650f404af 38
aravindsv 0:ba7650f404af 39 // Set high-speed mode
aravindsv 0:ba7650f404af 40 gpio->OSPEEDR &= ~(0x3 << offset);
aravindsv 0:ba7650f404af 41 gpio->OSPEEDR |= (0x2 << offset);
aravindsv 0:ba7650f404af 42
aravindsv 0:ba7650f404af 43 // FUNCTION
aravindsv 0:ba7650f404af 44 // Bottom seven pins are in AFR[0], top seven in AFR[1]
aravindsv 0:ba7650f404af 45 offset = (pin_index & 0x7) << 2;
aravindsv 0:ba7650f404af 46 if (pin_index <= 0x7) {
aravindsv 0:ba7650f404af 47 gpio->AFR[0] &= ~(0xF << offset);
aravindsv 0:ba7650f404af 48 gpio->AFR[0] |= func << offset;
aravindsv 0:ba7650f404af 49 }
aravindsv 0:ba7650f404af 50 else {
aravindsv 0:ba7650f404af 51 gpio->AFR[1] &= ~(0xF << offset);
aravindsv 0:ba7650f404af 52 gpio->AFR[1] |= func << offset;
aravindsv 0:ba7650f404af 53 }
aravindsv 0:ba7650f404af 54 }
aravindsv 0:ba7650f404af 55
aravindsv 0:ba7650f404af 56 void pin_mode(PinName pin, PinMode mode) {
aravindsv 0:ba7650f404af 57 MBED_ASSERT(pin != (PinName)NC);
aravindsv 0:ba7650f404af 58
aravindsv 0:ba7650f404af 59 uint32_t pin_number = (uint32_t)pin;
aravindsv 0:ba7650f404af 60 int port_index = pin_number >> 4;
aravindsv 0:ba7650f404af 61 int pin_index = (pin_number & 0xF);
aravindsv 0:ba7650f404af 62 int offset = pin_index << 1;
aravindsv 0:ba7650f404af 63
aravindsv 0:ba7650f404af 64 GPIO_TypeDef * gpio = ((GPIO_TypeDef *) (GPIOA_BASE + (port_index << 10)));
aravindsv 0:ba7650f404af 65 if (mode == OpenDrain) {
aravindsv 0:ba7650f404af 66 gpio->OTYPER |= 1 << pin_index;
aravindsv 0:ba7650f404af 67 }
aravindsv 0:ba7650f404af 68 else {
aravindsv 0:ba7650f404af 69 gpio->OTYPER &= ~(1 << pin_index);
aravindsv 0:ba7650f404af 70 gpio->PUPDR &= ~(0x3 << offset);
aravindsv 0:ba7650f404af 71 gpio->PUPDR |= mode << offset;
aravindsv 0:ba7650f404af 72 }
aravindsv 0:ba7650f404af 73 }
aravindsv 0:ba7650f404af 74