tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F3XX/pinmap.c

   1 /* mbed Microcontroller Library
   2  *******************************************************************************
   3  * Copyright (c) 2014, STMicroelectronics
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright notice,
  12  *    this list of conditions and the following disclaimer in the documentation
  13  *    and/or other materials provided with the distribution.
  14  * 3. Neither the name of STMicroelectronics nor the names of its contributors
  15  *    may be used to endorse or promote products derived from this software
  16  *    without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  21  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  24  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  25  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  26  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  27  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  *******************************************************************************
  29  */
  30 #include "mbed_assert.h"
  31 #include "pinmap.h"
  32 #include "PortNames.h"
  33 #include "mbed_error.h"
  34
  35 // Enable GPIO clock and return GPIO base address
  36 uint32_t Set_GPIO_Clock(uint32_t port_idx) {
  37     uint32_t gpio_add;
  38     switch (port_idx) {
  39         case PortA:
  40             gpio_add = GPIOA_BASE;
  41             RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
  42             break;
  43         case PortB:
  44             gpio_add = GPIOB_BASE;
  45             RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
  46             break;
  47         case PortC:
  48             gpio_add = GPIOC_BASE;
  49             RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);
  50             break;
  51         case PortD:
  52             gpio_add = GPIOD_BASE;
  53             RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOD, ENABLE);
  54             break;
  55         case PortE:
  56             gpio_add = GPIOE_BASE;
  57             RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOE, ENABLE);
  58             break;
  59         case PortF:
  60             gpio_add = GPIOF_BASE;
  61             RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOF, ENABLE);
  62             break;
  63         default:
  64             gpio_add = 0;
  65             error("Port number is not correct.");
  66             break;
  67     }
  68     return gpio_add;
  69 }
  70
  71 /**
  72  * Configure pin (mode, speed, output type and pull-up/pull-down)
  73  */
  74 void pin_function(PinName pin, int data) {
  75     MBED_ASSERT(pin != (PinName)NC);
  76
  77     // Get the pin informations
  78     uint32_t mode  = STM_PIN_MODE(data);
  79     uint32_t otype = STM_PIN_OTYPE(data);
  80     uint32_t pupd  = STM_PIN_PUPD(data);
  81     uint32_t afnum = STM_PIN_AFNUM(data);
  82
  83     uint32_t port_index = STM_PORT(pin);
  84     uint32_t pin_index  = STM_PIN(pin);
  85
  86     // Enable GPIO clock
  87     uint32_t gpio_add = Set_GPIO_Clock(port_index);
  88     GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
  89
  90     // Configure Alternate Function
  91     // Warning: Must be done before the GPIO is initialized
  92     if (afnum != 0xFF) {
  93         GPIO_PinAFConfig(gpio, (uint16_t)pin_index, afnum);
  94     }
  95
  96     // Configure GPIO
  97     GPIO_InitTypeDef GPIO_InitStructure;
  98     GPIO_InitStructure.GPIO_Pin   = (uint16_t)(1 << pin_index);
  99     GPIO_InitStructure.GPIO_Mode  = (GPIOMode_TypeDef)mode;
 100     GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_3;
 101     GPIO_InitStructure.GPIO_OType = (GPIOOType_TypeDef)otype;
 102     GPIO_InitStructure.GPIO_PuPd  = (GPIOPuPd_TypeDef)pupd;
 103     GPIO_Init(gpio, &GPIO_InitStructure);
 104
 105     // [TODO] Disconnect JTAG-DP + SW-DP signals.
 106     // Warning: Need to reconnect under reset
 107     //if ((pin == PA_13) || (pin == PA_14)) {
 108     //
 109     //}
 110     //if ((pin == PA_15) || (pin == PB_3) || (pin == PB_4)) {
 111     //
 112     //}
 113 }
 114
 115 /**
 116  * Configure pin pull-up/pull-down
 117  */
 118 void pin_mode(PinName pin, PinMode mode) {
 119     MBED_ASSERT(pin != (PinName)NC);
 120
 121     uint32_t port_index = STM_PORT(pin);
 122     uint32_t pin_index  = STM_PIN(pin);
 123
 124     // Enable GPIO clock
 125     uint32_t gpio_add = Set_GPIO_Clock(port_index);
 126     GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
 127
 128     // Configure pull-up/pull-down resistors
 129     uint32_t pupd = (uint32_t)mode;
 130     if (pupd > 2)
 131         pupd = 0; // Open-drain = No pull-up/No pull-down
 132     gpio->PUPDR &= (uint32_t)(~(GPIO_PUPDR_PUPDR0 << (pin_index * 2)));
 133     gpio->PUPDR |= (uint32_t)(pupd << (pin_index * 2));
 134
 135 }