tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F0/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 // GPIO mode look-up table
  36 static const uint32_t gpio_mode[13] = {
  37     0x00000000, //  0 = GPIO_MODE_INPUT
  38     0x00000001, //  1 = GPIO_MODE_OUTPUT_PP
  39     0x00000011, //  2 = GPIO_MODE_OUTPUT_OD
  40     0x00000002, //  3 = GPIO_MODE_AF_PP
  41     0x00000012, //  4 = GPIO_MODE_AF_OD
  42     0x00000003, //  5 = GPIO_MODE_ANALOG
  43     0x10110000, //  6 = GPIO_MODE_IT_RISING
  44     0x10210000, //  7 = GPIO_MODE_IT_FALLING
  45     0x10310000, //  8 = GPIO_MODE_IT_RISING_FALLING
  46     0x10120000, //  9 = GPIO_MODE_EVT_RISING
  47     0x10220000, // 10 = GPIO_MODE_EVT_FALLING
  48     0x10320000, // 11 = GPIO_MODE_EVT_RISING_FALLING
  49     0x10000000  // 12 = Reset IT and EVT (not in STM32Cube HAL)
  50 };
  51
  52 // Enable GPIO clock and return GPIO base address
  53 uint32_t Set_GPIO_Clock(uint32_t port_idx)
  54 {
  55     uint32_t gpio_add = 0;
  56     switch (port_idx) {
  57         case PortA:
  58             gpio_add = GPIOA_BASE;
  59             __GPIOA_CLK_ENABLE();
  60             break;
  61         case PortB:
  62             gpio_add = GPIOB_BASE;
  63             __GPIOB_CLK_ENABLE();
  64             break;
  65         case PortC:
  66             gpio_add = GPIOC_BASE;
  67             __GPIOC_CLK_ENABLE();
  68             break;
  69         case PortD:
  70             gpio_add = GPIOD_BASE;
  71             __GPIOD_CLK_ENABLE();
  72             break;
  73         case PortF:
  74             gpio_add = GPIOF_BASE;
  75             __GPIOF_CLK_ENABLE();
  76             break;
  77         default:
  78             error("Pinmap error: wrong port number.");
  79             break;
  80     }
  81     return gpio_add;
  82 }
  83
  84 /**
  85  * Configure pin (mode, speed, output type and pull-up/pull-down)
  86  */
  87 void pin_function(PinName pin, int data)
  88 {
  89     MBED_ASSERT(pin != (PinName)NC);
  90
  91     // Get the pin informations
  92     uint32_t mode  = STM_PIN_MODE(data);
  93     uint32_t pupd  = STM_PIN_PUPD(data);
  94     uint32_t afnum = STM_PIN_AFNUM(data);
  95
  96     uint32_t port_index = STM_PORT(pin);
  97     uint32_t pin_index  = STM_PIN(pin);
  98
  99     // Enable GPIO clock
 100     uint32_t gpio_add = Set_GPIO_Clock(port_index);
 101     GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
 102
 103     // Configure GPIO
 104     GPIO_InitTypeDef GPIO_InitStructure;
 105     GPIO_InitStructure.Pin       = (uint32_t)(1 << pin_index);
 106     GPIO_InitStructure.Mode      = gpio_mode[mode];
 107     GPIO_InitStructure.Pull      = pupd;
 108     GPIO_InitStructure.Speed     = GPIO_SPEED_HIGH;
 109     GPIO_InitStructure.Alternate = afnum;
 110     HAL_GPIO_Init(gpio, &GPIO_InitStructure);
 111
 112     // [TODO] Disconnect SWDIO and SWCLK signals ?
 113     // Warning: For debugging it is necessary to reconnect under reset if this is done.
 114     //if ((pin == PA_13) || (pin == PA_14)) {
 115     //
 116     //}
 117 }
 118
 119 /**
 120  * Configure pin pull-up/pull-down
 121  */
 122 void pin_mode(PinName pin, PinMode mode)
 123 {
 124     MBED_ASSERT(pin != (PinName)NC);
 125
 126     uint32_t port_index = STM_PORT(pin);
 127     uint32_t pin_index  = STM_PIN(pin);
 128
 129     // Enable GPIO clock
 130     uint32_t gpio_add = Set_GPIO_Clock(port_index);
 131     GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
 132
 133     // Configure pull-up/pull-down resistors
 134     uint32_t pupd = (uint32_t)mode;
 135     if (pupd > 2) pupd = 0; // Open-drain = No pull-up/No pull-down
 136     gpio->PUPDR &= (uint32_t)(~(GPIO_PUPDR_PUPDR0 << (pin_index * 2)));
 137     gpio->PUPDR |= (uint32_t)(pupd << (pin_index * 2));
 138
 139 }