b luo / mbed-dev

mbed library sources. With a patch for the can_api

Fork of mbed-dev by mbed official

targets/TARGET_STM/TARGET_STM32F0/pinmap.c@151:91825d030f9b, 2016-11-14 (annotated)

Committer:
DangerousElectrician
Date:
Mon Nov 14 04:39:23 2016 +0000
Revision:
151:91825d030f9b
Parent:
149:156823d33999 
stuff changed?

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 149:156823d33999 1 /* mbed Microcontroller Library
<> 149:156823d33999 2 *******************************************************************************
<> 149:156823d33999 3 * Copyright (c) 2014, STMicroelectronics
<> 149:156823d33999 4 * All rights reserved.
<> 149:156823d33999 5 *
<> 149:156823d33999 6 * Redistribution and use in source and binary forms, with or without
<> 149:156823d33999 7 * modification, are permitted provided that the following conditions are met:
<> 149:156823d33999 8 *
<> 149:156823d33999 9 * 1. Redistributions of source code must retain the above copyright notice,
<> 149:156823d33999 10 * this list of conditions and the following disclaimer.
<> 149:156823d33999 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 149:156823d33999 12 * this list of conditions and the following disclaimer in the documentation
<> 149:156823d33999 13 * and/or other materials provided with the distribution.
<> 149:156823d33999 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
<> 149:156823d33999 15 * may be used to endorse or promote products derived from this software
<> 149:156823d33999 16 * without specific prior written permission.
<> 149:156823d33999 17 *
<> 149:156823d33999 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 149:156823d33999 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 149:156823d33999 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 149:156823d33999 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 149:156823d33999 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 149:156823d33999 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 149:156823d33999 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 149:156823d33999 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 149:156823d33999 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 149:156823d33999 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 149:156823d33999 28 *******************************************************************************
<> 149:156823d33999 29 */
<> 149:156823d33999 30 #include "mbed_assert.h"
<> 149:156823d33999 31 #include "pinmap.h"
<> 149:156823d33999 32 #include "PortNames.h"
<> 149:156823d33999 33 #include "mbed_error.h"
<> 149:156823d33999 34
<> 149:156823d33999 35 // GPIO mode look-up table
<> 149:156823d33999 36 static const uint32_t gpio_mode[13] = {
<> 149:156823d33999 37 0x00000000, // 0 = GPIO_MODE_INPUT
<> 149:156823d33999 38 0x00000001, // 1 = GPIO_MODE_OUTPUT_PP
<> 149:156823d33999 39 0x00000011, // 2 = GPIO_MODE_OUTPUT_OD
<> 149:156823d33999 40 0x00000002, // 3 = GPIO_MODE_AF_PP
<> 149:156823d33999 41 0x00000012, // 4 = GPIO_MODE_AF_OD
<> 149:156823d33999 42 0x00000003, // 5 = GPIO_MODE_ANALOG
<> 149:156823d33999 43 0x10110000, // 6 = GPIO_MODE_IT_RISING
<> 149:156823d33999 44 0x10210000, // 7 = GPIO_MODE_IT_FALLING
<> 149:156823d33999 45 0x10310000, // 8 = GPIO_MODE_IT_RISING_FALLING
<> 149:156823d33999 46 0x10120000, // 9 = GPIO_MODE_EVT_RISING
<> 149:156823d33999 47 0x10220000, // 10 = GPIO_MODE_EVT_FALLING
<> 149:156823d33999 48 0x10320000, // 11 = GPIO_MODE_EVT_RISING_FALLING
<> 149:156823d33999 49 0x10000000 // 12 = Reset IT and EVT (not in STM32Cube HAL)
<> 149:156823d33999 50 };
<> 149:156823d33999 51
<> 149:156823d33999 52 // Enable GPIO clock and return GPIO base address
<> 149:156823d33999 53 uint32_t Set_GPIO_Clock(uint32_t port_idx) {
<> 149:156823d33999 54 uint32_t gpio_add = 0;
<> 149:156823d33999 55 switch (port_idx) {
<> 149:156823d33999 56 case PortA:
<> 149:156823d33999 57 gpio_add = GPIOA_BASE;
<> 149:156823d33999 58 __GPIOA_CLK_ENABLE();
<> 149:156823d33999 59 break;
<> 149:156823d33999 60 case PortB:
<> 149:156823d33999 61 gpio_add = GPIOB_BASE;
<> 149:156823d33999 62 __GPIOB_CLK_ENABLE();
<> 149:156823d33999 63 break;
<> 149:156823d33999 64 #if defined(GPIOC_BASE)
<> 149:156823d33999 65 case PortC:
<> 149:156823d33999 66 gpio_add = GPIOC_BASE;
<> 149:156823d33999 67 __GPIOC_CLK_ENABLE();
<> 149:156823d33999 68 break;
<> 149:156823d33999 69 #endif
<> 149:156823d33999 70 #if defined(GPIOD_BASE)
<> 149:156823d33999 71 case PortD:
<> 149:156823d33999 72 gpio_add = GPIOD_BASE;
<> 149:156823d33999 73 __GPIOD_CLK_ENABLE();
<> 149:156823d33999 74 break;
<> 149:156823d33999 75 #endif
<> 149:156823d33999 76 #if defined(GPIOF_BASE)
<> 149:156823d33999 77 case PortF:
<> 149:156823d33999 78 gpio_add = GPIOF_BASE;
<> 149:156823d33999 79 __GPIOF_CLK_ENABLE();
<> 149:156823d33999 80 break;
<> 149:156823d33999 81 #endif
<> 149:156823d33999 82 default:
<> 149:156823d33999 83 error("Pinmap error: wrong port number.");
<> 149:156823d33999 84 break;
<> 149:156823d33999 85 }
<> 149:156823d33999 86 return gpio_add;
<> 149:156823d33999 87 }
<> 149:156823d33999 88
<> 149:156823d33999 89 /**
<> 149:156823d33999 90 * Configure pin (mode, speed, output type and pull-up/pull-down)
<> 149:156823d33999 91 */
<> 149:156823d33999 92 void pin_function(PinName pin, int data) {
<> 149:156823d33999 93 MBED_ASSERT(pin != (PinName)NC);
<> 149:156823d33999 94
<> 149:156823d33999 95 // Get the pin informations
<> 149:156823d33999 96 uint32_t mode = STM_PIN_MODE(data);
<> 149:156823d33999 97 uint32_t pupd = STM_PIN_PUPD(data);
<> 149:156823d33999 98 uint32_t afnum = STM_PIN_AFNUM(data);
<> 149:156823d33999 99
<> 149:156823d33999 100 uint32_t port_index = STM_PORT(pin);
<> 149:156823d33999 101 uint32_t pin_index = STM_PIN(pin);
<> 149:156823d33999 102
<> 149:156823d33999 103 // Enable GPIO clock
<> 149:156823d33999 104 uint32_t gpio_add = Set_GPIO_Clock(port_index);
<> 149:156823d33999 105 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
<> 149:156823d33999 106
<> 149:156823d33999 107 // Configure GPIO
<> 149:156823d33999 108 GPIO_InitTypeDef GPIO_InitStructure;
<> 149:156823d33999 109 GPIO_InitStructure.Pin = (uint32_t)(1 << pin_index);
<> 149:156823d33999 110 GPIO_InitStructure.Mode = gpio_mode[mode];
<> 149:156823d33999 111 GPIO_InitStructure.Pull = pupd;
<> 149:156823d33999 112 GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
<> 149:156823d33999 113 GPIO_InitStructure.Alternate = afnum;
<> 149:156823d33999 114 HAL_GPIO_Init(gpio, &GPIO_InitStructure);
<> 149:156823d33999 115
<> 149:156823d33999 116 // [TODO] Disconnect SWDIO and SWCLK signals ?
<> 149:156823d33999 117 // Warning: For debugging it is necessary to reconnect under reset if this is done.
<> 149:156823d33999 118 //if ((pin == PA_13) || (pin == PA_14)) {
<> 149:156823d33999 119 //
<> 149:156823d33999 120 //}
<> 149:156823d33999 121 }
<> 149:156823d33999 122
<> 149:156823d33999 123 /**
<> 149:156823d33999 124 * Configure pin pull-up/pull-down
<> 149:156823d33999 125 */
<> 149:156823d33999 126 void pin_mode(PinName pin, PinMode mode) {
<> 149:156823d33999 127 MBED_ASSERT(pin != (PinName)NC);
<> 149:156823d33999 128
<> 149:156823d33999 129 uint32_t port_index = STM_PORT(pin);
<> 149:156823d33999 130 uint32_t pin_index = STM_PIN(pin);
<> 149:156823d33999 131
<> 149:156823d33999 132 // Enable GPIO clock
<> 149:156823d33999 133 uint32_t gpio_add = Set_GPIO_Clock(port_index);
<> 149:156823d33999 134 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
<> 149:156823d33999 135
<> 149:156823d33999 136 // Configure pull-up/pull-down resistors
<> 149:156823d33999 137 uint32_t pupd = (uint32_t)mode;
<> 149:156823d33999 138 if (pupd > 2) pupd = 0; // Open-drain = No pull-up/No pull-down
<> 149:156823d33999 139 gpio->PUPDR &= (uint32_t)(~(GPIO_PUPDR_PUPDR0 << (pin_index * 2)));
<> 149:156823d33999 140 gpio->PUPDR |= (uint32_t)(pupd << (pin_index * 2));
<> 149:156823d33999 141 }
<> 149:156823d33999 142
<> 149:156823d33999 143 /* Internal function for setting the gpiomode/function
<> 149:156823d33999 144 * without changing Pull mode
<> 149:156823d33999 145 */
<> 149:156823d33999 146 void pin_function_gpiomode(PinName pin, uint32_t gpiomode) {
<> 149:156823d33999 147
<> 149:156823d33999 148 /* Read current pull state from HW to avoid over-write*/
<> 149:156823d33999 149 uint32_t port_index = STM_PORT(pin);
<> 149:156823d33999 150 uint32_t pin_index = STM_PIN(pin);
<> 149:156823d33999 151 GPIO_TypeDef *gpio = (GPIO_TypeDef *) Set_GPIO_Clock(port_index);
<> 149:156823d33999 152 uint32_t temp = gpio->PUPDR;
<> 149:156823d33999 153 uint32_t pull = (temp >> (pin_index * 2U)) & GPIO_PUPDR_PUPDR0;
<> 149:156823d33999 154
<> 149:156823d33999 155 /* Then re-use global function for updating the mode part*/
<> 149:156823d33999 156 pin_function(pin, STM_PIN_DATA(gpiomode, pull, 0));
<> 149:156823d33999 157 }