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Dependents:   SPI_slave_frdm

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_DISCO_F100RB/pinmap.c@126:549ba18ddd81, 2014-03-19 (annotated)

Committer:
mbed_official
Date:
Wed Mar 19 16:00:09 2014 +0000
Revision:
126:549ba18ddd81
Child:
142:7f2b6c44bbe3
Synchronized with git revision cf8fd1cf86b0cd85131dd24a6ded21cc6fe04827



Full URL: https://github.com/mbedmicro/mbed/commit/cf8fd1cf86b0cd85131dd24a6ded21cc6fe04827/



Conflicts:

	workspace_tools/targets.py

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 126:549ba18ddd81 1 /* mbed Microcontroller Library
mbed_official 126:549ba18ddd81 2 *******************************************************************************
mbed_official 126:549ba18ddd81 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 126:549ba18ddd81 4 * All rights reserved.
mbed_official 126:549ba18ddd81 5 *
mbed_official 126:549ba18ddd81 6 * Redistribution and use in source and binary forms, with or without
mbed_official 126:549ba18ddd81 7 * modification, are permitted provided that the following conditions are met:
mbed_official 126:549ba18ddd81 8 *
mbed_official 126:549ba18ddd81 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 126:549ba18ddd81 10 * this list of conditions and the following disclaimer.
mbed_official 126:549ba18ddd81 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 126:549ba18ddd81 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 126:549ba18ddd81 13 * and/or other materials provided with the distribution.
mbed_official 126:549ba18ddd81 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 126:549ba18ddd81 15 * may be used to endorse or promote products derived from this software
mbed_official 126:549ba18ddd81 16 * without specific prior written permission.
mbed_official 126:549ba18ddd81 17 *
mbed_official 126:549ba18ddd81 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 126:549ba18ddd81 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 126:549ba18ddd81 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 126:549ba18ddd81 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 126:549ba18ddd81 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 126:549ba18ddd81 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 126:549ba18ddd81 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 126:549ba18ddd81 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 126:549ba18ddd81 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 126:549ba18ddd81 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 126:549ba18ddd81 28 *******************************************************************************
mbed_official 126:549ba18ddd81 29 */
mbed_official 126:549ba18ddd81 30 #include "pinmap.h"
mbed_official 126:549ba18ddd81 31 #include "error.h"
mbed_official 126:549ba18ddd81 32
mbed_official 126:549ba18ddd81 33 // Alternate-function mapping
mbed_official 126:549ba18ddd81 34 static const uint32_t AF_mapping[] = {
mbed_official 126:549ba18ddd81 35 0, // 0 = No AF
mbed_official 126:549ba18ddd81 36 GPIO_Remap_SPI1, // 1
mbed_official 126:549ba18ddd81 37 GPIO_Remap_I2C1, // 2
mbed_official 126:549ba18ddd81 38 GPIO_Remap_USART1, // 3
mbed_official 126:549ba18ddd81 39 GPIO_Remap_USART2, // 4
mbed_official 126:549ba18ddd81 40 GPIO_FullRemap_TIM2, // 5
mbed_official 126:549ba18ddd81 41 GPIO_FullRemap_TIM3, // 6
mbed_official 126:549ba18ddd81 42 GPIO_PartialRemap_TIM3, // 7
mbed_official 126:549ba18ddd81 43 GPIO_Remap_I2C1 // 8
mbed_official 126:549ba18ddd81 44 };
mbed_official 126:549ba18ddd81 45
mbed_official 126:549ba18ddd81 46 // Enable GPIO clock and return GPIO base address
mbed_official 126:549ba18ddd81 47 uint32_t Set_GPIO_Clock(uint32_t port_idx) {
mbed_official 126:549ba18ddd81 48 uint32_t gpio_add = 0;
mbed_official 126:549ba18ddd81 49 switch (port_idx) {
mbed_official 126:549ba18ddd81 50 case PortA:
mbed_official 126:549ba18ddd81 51 gpio_add = GPIOA_BASE;
mbed_official 126:549ba18ddd81 52 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
mbed_official 126:549ba18ddd81 53 break;
mbed_official 126:549ba18ddd81 54 case PortB:
mbed_official 126:549ba18ddd81 55 gpio_add = GPIOB_BASE;
mbed_official 126:549ba18ddd81 56 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
mbed_official 126:549ba18ddd81 57 break;
mbed_official 126:549ba18ddd81 58 case PortC:
mbed_official 126:549ba18ddd81 59 gpio_add = GPIOC_BASE;
mbed_official 126:549ba18ddd81 60 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
mbed_official 126:549ba18ddd81 61 break;
mbed_official 126:549ba18ddd81 62 case PortD:
mbed_official 126:549ba18ddd81 63 gpio_add = GPIOD_BASE;
mbed_official 126:549ba18ddd81 64 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);
mbed_official 126:549ba18ddd81 65 break;
mbed_official 126:549ba18ddd81 66 default:
mbed_official 126:549ba18ddd81 67 error("Port number is not correct.");
mbed_official 126:549ba18ddd81 68 break;
mbed_official 126:549ba18ddd81 69 }
mbed_official 126:549ba18ddd81 70 return gpio_add;
mbed_official 126:549ba18ddd81 71 }
mbed_official 126:549ba18ddd81 72
mbed_official 126:549ba18ddd81 73 /**
mbed_official 126:549ba18ddd81 74 * Configure pin (input, output, alternate function or analog) + output speed + AF
mbed_official 126:549ba18ddd81 75 */
mbed_official 126:549ba18ddd81 76 void pin_function(PinName pin, int data) {
mbed_official 126:549ba18ddd81 77 if (pin == NC) return;
mbed_official 126:549ba18ddd81 78
mbed_official 126:549ba18ddd81 79 // Get the pin informations
mbed_official 126:549ba18ddd81 80 uint32_t mode = STM_PIN_MODE(data);
mbed_official 126:549ba18ddd81 81 uint32_t afnum = STM_PIN_AFNUM(data);
mbed_official 126:549ba18ddd81 82
mbed_official 126:549ba18ddd81 83 uint32_t port_index = STM_PORT(pin);
mbed_official 126:549ba18ddd81 84 uint32_t pin_index = STM_PIN(pin);
mbed_official 126:549ba18ddd81 85
mbed_official 126:549ba18ddd81 86 // Enable GPIO clock
mbed_official 126:549ba18ddd81 87 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 126:549ba18ddd81 88 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
mbed_official 126:549ba18ddd81 89
mbed_official 126:549ba18ddd81 90 // Enable AFIO clock
mbed_official 126:549ba18ddd81 91 RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
mbed_official 126:549ba18ddd81 92
mbed_official 126:549ba18ddd81 93 // Configure Alternate Function
mbed_official 126:549ba18ddd81 94 // Warning: Must be done before the GPIO is initialized
mbed_official 126:549ba18ddd81 95 if (afnum > 0) {
mbed_official 126:549ba18ddd81 96 GPIO_PinRemapConfig(AF_mapping[afnum], ENABLE);
mbed_official 126:549ba18ddd81 97 }
mbed_official 126:549ba18ddd81 98
mbed_official 126:549ba18ddd81 99 // Configure GPIO
mbed_official 126:549ba18ddd81 100 GPIO_InitTypeDef GPIO_InitStructure;
mbed_official 126:549ba18ddd81 101 GPIO_InitStructure.GPIO_Pin = (uint16_t)(1 << pin_index);
mbed_official 126:549ba18ddd81 102 GPIO_InitStructure.GPIO_Mode = (GPIOMode_TypeDef)mode;
mbed_official 126:549ba18ddd81 103 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
mbed_official 126:549ba18ddd81 104 GPIO_Init(gpio, &GPIO_InitStructure);
mbed_official 126:549ba18ddd81 105
mbed_official 126:549ba18ddd81 106 // Disconnect JTAG-DP + SW-DP signals.
mbed_official 126:549ba18ddd81 107 // Warning: Need to reconnect under reset
mbed_official 126:549ba18ddd81 108 if ((pin == PA_13) || (pin == PA_14)) {
mbed_official 126:549ba18ddd81 109 GPIO_PinRemapConfig(GPIO_Remap_SWJ_Disable, ENABLE);
mbed_official 126:549ba18ddd81 110 }
mbed_official 126:549ba18ddd81 111 if ((pin == PA_15) || (pin == PB_3) || (pin == PB_4)) {
mbed_official 126:549ba18ddd81 112 GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE);
mbed_official 126:549ba18ddd81 113 }
mbed_official 126:549ba18ddd81 114 }
mbed_official 126:549ba18ddd81 115
mbed_official 126:549ba18ddd81 116 /**
mbed_official 126:549ba18ddd81 117 * Configure pin pull-up/pull-down
mbed_official 126:549ba18ddd81 118 */
mbed_official 126:549ba18ddd81 119 void pin_mode(PinName pin, PinMode mode) {
mbed_official 126:549ba18ddd81 120 GPIO_InitTypeDef GPIO_InitStructure;
mbed_official 126:549ba18ddd81 121
mbed_official 126:549ba18ddd81 122 if (pin == NC) return;
mbed_official 126:549ba18ddd81 123
mbed_official 126:549ba18ddd81 124 uint32_t port_index = STM_PORT(pin);
mbed_official 126:549ba18ddd81 125 uint32_t pin_index = STM_PIN(pin);
mbed_official 126:549ba18ddd81 126
mbed_official 126:549ba18ddd81 127 // Enable GPIO clock
mbed_official 126:549ba18ddd81 128 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 126:549ba18ddd81 129 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
mbed_official 126:549ba18ddd81 130
mbed_official 126:549ba18ddd81 131 // Configure open-drain and pull-up/down
mbed_official 126:549ba18ddd81 132 switch (mode) {
mbed_official 126:549ba18ddd81 133 case PullNone:
mbed_official 126:549ba18ddd81 134 return;
mbed_official 126:549ba18ddd81 135 case PullUp:
mbed_official 126:549ba18ddd81 136 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
mbed_official 126:549ba18ddd81 137 break;
mbed_official 126:549ba18ddd81 138 case PullDown:
mbed_official 126:549ba18ddd81 139 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
mbed_official 126:549ba18ddd81 140 break;
mbed_official 126:549ba18ddd81 141 case OpenDrain:
mbed_official 126:549ba18ddd81 142 if (pin_index < 8) {
mbed_official 126:549ba18ddd81 143 if ((gpio->CRL & (0x03 << (pin_index * 4))) > 0) { // MODE bits = Output mode
mbed_official 126:549ba18ddd81 144 gpio->CRL |= (0x04 << (pin_index * 4)); // Set open-drain
mbed_official 126:549ba18ddd81 145 }
mbed_official 126:549ba18ddd81 146 }
mbed_official 126:549ba18ddd81 147 else {
mbed_official 126:549ba18ddd81 148 if ((gpio->CRH & (0x03 << ((pin_index % 8) * 4))) > 0) { // MODE bits = Output mode
mbed_official 126:549ba18ddd81 149 gpio->CRH |= (0x04 << ((pin_index % 8) * 4)); // Set open-drain
mbed_official 126:549ba18ddd81 150 }
mbed_official 126:549ba18ddd81 151 }
mbed_official 126:549ba18ddd81 152 return;
mbed_official 126:549ba18ddd81 153 default:
mbed_official 126:549ba18ddd81 154 break;
mbed_official 126:549ba18ddd81 155 }
mbed_official 126:549ba18ddd81 156
mbed_official 126:549ba18ddd81 157 // Configure GPIO
mbed_official 126:549ba18ddd81 158 GPIO_InitStructure.GPIO_Pin = (uint16_t)(1 << pin_index);
mbed_official 126:549ba18ddd81 159 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
mbed_official 126:549ba18ddd81 160 GPIO_Init(gpio, &GPIO_InitStructure);
mbed_official 126:549ba18ddd81 161 }