Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

targets/TARGET_STM/TARGET_STM32F0/pinmap.c@1:3deb71413561, 2017-07-20 (annotated)

Committer:
xuaner
Date:
Thu Jul 20 14:26:57 2017 +0000
Revision:
1:3deb71413561
Parent:
0:f269e3021894 
mbed_os

Who changed what in which revision?

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elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 *******************************************************************************
elessair 0:f269e3021894 3 * Copyright (c) 2014, STMicroelectronics
elessair 0:f269e3021894 4 * All rights reserved.
elessair 0:f269e3021894 5 *
elessair 0:f269e3021894 6 * Redistribution and use in source and binary forms, with or without
elessair 0:f269e3021894 7 * modification, are permitted provided that the following conditions are met:
elessair 0:f269e3021894 8 *
elessair 0:f269e3021894 9 * 1. Redistributions of source code must retain the above copyright notice,
elessair 0:f269e3021894 10 * this list of conditions and the following disclaimer.
elessair 0:f269e3021894 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
elessair 0:f269e3021894 12 * this list of conditions and the following disclaimer in the documentation
elessair 0:f269e3021894 13 * and/or other materials provided with the distribution.
elessair 0:f269e3021894 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
elessair 0:f269e3021894 15 * may be used to endorse or promote products derived from this software
elessair 0:f269e3021894 16 * without specific prior written permission.
elessair 0:f269e3021894 17 *
elessair 0:f269e3021894 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
elessair 0:f269e3021894 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
elessair 0:f269e3021894 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
elessair 0:f269e3021894 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
elessair 0:f269e3021894 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
elessair 0:f269e3021894 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
elessair 0:f269e3021894 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
elessair 0:f269e3021894 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
elessair 0:f269e3021894 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
elessair 0:f269e3021894 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
elessair 0:f269e3021894 28 *******************************************************************************
elessair 0:f269e3021894 29 */
elessair 0:f269e3021894 30 #include "mbed_assert.h"
elessair 0:f269e3021894 31 #include "pinmap.h"
elessair 0:f269e3021894 32 #include "PortNames.h"
elessair 0:f269e3021894 33 #include "mbed_error.h"
elessair 0:f269e3021894 34
elessair 0:f269e3021894 35 // GPIO mode look-up table
elessair 0:f269e3021894 36 static const uint32_t gpio_mode[13] = {
elessair 0:f269e3021894 37 0x00000000, // 0 = GPIO_MODE_INPUT
elessair 0:f269e3021894 38 0x00000001, // 1 = GPIO_MODE_OUTPUT_PP
elessair 0:f269e3021894 39 0x00000011, // 2 = GPIO_MODE_OUTPUT_OD
elessair 0:f269e3021894 40 0x00000002, // 3 = GPIO_MODE_AF_PP
elessair 0:f269e3021894 41 0x00000012, // 4 = GPIO_MODE_AF_OD
elessair 0:f269e3021894 42 0x00000003, // 5 = GPIO_MODE_ANALOG
elessair 0:f269e3021894 43 0x10110000, // 6 = GPIO_MODE_IT_RISING
elessair 0:f269e3021894 44 0x10210000, // 7 = GPIO_MODE_IT_FALLING
elessair 0:f269e3021894 45 0x10310000, // 8 = GPIO_MODE_IT_RISING_FALLING
elessair 0:f269e3021894 46 0x10120000, // 9 = GPIO_MODE_EVT_RISING
elessair 0:f269e3021894 47 0x10220000, // 10 = GPIO_MODE_EVT_FALLING
elessair 0:f269e3021894 48 0x10320000, // 11 = GPIO_MODE_EVT_RISING_FALLING
elessair 0:f269e3021894 49 0x10000000 // 12 = Reset IT and EVT (not in STM32Cube HAL)
elessair 0:f269e3021894 50 };
elessair 0:f269e3021894 51
elessair 0:f269e3021894 52 // Enable GPIO clock and return GPIO base address
elessair 0:f269e3021894 53 uint32_t Set_GPIO_Clock(uint32_t port_idx) {
elessair 0:f269e3021894 54 uint32_t gpio_add = 0;
elessair 0:f269e3021894 55 switch (port_idx) {
elessair 0:f269e3021894 56 case PortA:
elessair 0:f269e3021894 57 gpio_add = GPIOA_BASE;
elessair 0:f269e3021894 58 __GPIOA_CLK_ENABLE();
elessair 0:f269e3021894 59 break;
elessair 0:f269e3021894 60 case PortB:
elessair 0:f269e3021894 61 gpio_add = GPIOB_BASE;
elessair 0:f269e3021894 62 __GPIOB_CLK_ENABLE();
elessair 0:f269e3021894 63 break;
elessair 0:f269e3021894 64 #if defined(GPIOC_BASE)
elessair 0:f269e3021894 65 case PortC:
elessair 0:f269e3021894 66 gpio_add = GPIOC_BASE;
elessair 0:f269e3021894 67 __GPIOC_CLK_ENABLE();
elessair 0:f269e3021894 68 break;
elessair 0:f269e3021894 69 #endif
elessair 0:f269e3021894 70 #if defined(GPIOD_BASE)
elessair 0:f269e3021894 71 case PortD:
elessair 0:f269e3021894 72 gpio_add = GPIOD_BASE;
elessair 0:f269e3021894 73 __GPIOD_CLK_ENABLE();
elessair 0:f269e3021894 74 break;
elessair 0:f269e3021894 75 #endif
elessair 0:f269e3021894 76 #if defined(GPIOF_BASE)
elessair 0:f269e3021894 77 case PortF:
elessair 0:f269e3021894 78 gpio_add = GPIOF_BASE;
elessair 0:f269e3021894 79 __GPIOF_CLK_ENABLE();
elessair 0:f269e3021894 80 break;
elessair 0:f269e3021894 81 #endif
elessair 0:f269e3021894 82 default:
elessair 0:f269e3021894 83 error("Pinmap error: wrong port number.");
elessair 0:f269e3021894 84 break;
elessair 0:f269e3021894 85 }
elessair 0:f269e3021894 86 return gpio_add;
elessair 0:f269e3021894 87 }
elessair 0:f269e3021894 88
elessair 0:f269e3021894 89 /**
elessair 0:f269e3021894 90 * Configure pin (mode, speed, output type and pull-up/pull-down)
elessair 0:f269e3021894 91 */
elessair 0:f269e3021894 92 void pin_function(PinName pin, int data) {
elessair 0:f269e3021894 93 MBED_ASSERT(pin != (PinName)NC);
elessair 0:f269e3021894 94
elessair 0:f269e3021894 95 // Get the pin informations
elessair 0:f269e3021894 96 uint32_t mode = STM_PIN_MODE(data);
elessair 0:f269e3021894 97 uint32_t pupd = STM_PIN_PUPD(data);
elessair 0:f269e3021894 98 uint32_t afnum = STM_PIN_AFNUM(data);
elessair 0:f269e3021894 99
elessair 0:f269e3021894 100 uint32_t port_index = STM_PORT(pin);
elessair 0:f269e3021894 101 uint32_t pin_index = STM_PIN(pin);
elessair 0:f269e3021894 102
elessair 0:f269e3021894 103 // Enable GPIO clock
elessair 0:f269e3021894 104 uint32_t gpio_add = Set_GPIO_Clock(port_index);
elessair 0:f269e3021894 105 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
elessair 0:f269e3021894 106
elessair 0:f269e3021894 107 // Configure GPIO
elessair 0:f269e3021894 108 GPIO_InitTypeDef GPIO_InitStructure;
elessair 0:f269e3021894 109 GPIO_InitStructure.Pin = (uint32_t)(1 << pin_index);
elessair 0:f269e3021894 110 GPIO_InitStructure.Mode = gpio_mode[mode];
elessair 0:f269e3021894 111 GPIO_InitStructure.Pull = pupd;
elessair 0:f269e3021894 112 GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
elessair 0:f269e3021894 113 GPIO_InitStructure.Alternate = afnum;
elessair 0:f269e3021894 114 HAL_GPIO_Init(gpio, &GPIO_InitStructure);
elessair 0:f269e3021894 115
elessair 0:f269e3021894 116 // [TODO] Disconnect SWDIO and SWCLK signals ?
elessair 0:f269e3021894 117 // Warning: For debugging it is necessary to reconnect under reset if this is done.
elessair 0:f269e3021894 118 //if ((pin == PA_13) || (pin == PA_14)) {
elessair 0:f269e3021894 119 //
elessair 0:f269e3021894 120 //}
elessair 0:f269e3021894 121 }
elessair 0:f269e3021894 122
elessair 0:f269e3021894 123 /**
elessair 0:f269e3021894 124 * Configure pin pull-up/pull-down
elessair 0:f269e3021894 125 */
elessair 0:f269e3021894 126 void pin_mode(PinName pin, PinMode mode) {
elessair 0:f269e3021894 127 MBED_ASSERT(pin != (PinName)NC);
elessair 0:f269e3021894 128
elessair 0:f269e3021894 129 uint32_t port_index = STM_PORT(pin);
elessair 0:f269e3021894 130 uint32_t pin_index = STM_PIN(pin);
elessair 0:f269e3021894 131
elessair 0:f269e3021894 132 // Enable GPIO clock
elessair 0:f269e3021894 133 uint32_t gpio_add = Set_GPIO_Clock(port_index);
elessair 0:f269e3021894 134 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
elessair 0:f269e3021894 135
elessair 0:f269e3021894 136 // Configure pull-up/pull-down resistors
elessair 0:f269e3021894 137 uint32_t pupd = (uint32_t)mode;
elessair 0:f269e3021894 138 if (pupd > 2) pupd = 0; // Open-drain = No pull-up/No pull-down
elessair 0:f269e3021894 139 gpio->PUPDR &= (uint32_t)(~(GPIO_PUPDR_PUPDR0 << (pin_index * 2)));
elessair 0:f269e3021894 140 gpio->PUPDR |= (uint32_t)(pupd << (pin_index * 2));
elessair 0:f269e3021894 141 }
elessair 0:f269e3021894 142
elessair 0:f269e3021894 143 /* Internal function for setting the gpiomode/function
elessair 0:f269e3021894 144 * without changing Pull mode
elessair 0:f269e3021894 145 */
elessair 0:f269e3021894 146 void pin_function_gpiomode(PinName pin, uint32_t gpiomode) {
elessair 0:f269e3021894 147
elessair 0:f269e3021894 148 /* Read current pull state from HW to avoid over-write*/
elessair 0:f269e3021894 149 uint32_t port_index = STM_PORT(pin);
elessair 0:f269e3021894 150 uint32_t pin_index = STM_PIN(pin);
elessair 0:f269e3021894 151 GPIO_TypeDef *gpio = (GPIO_TypeDef *) Set_GPIO_Clock(port_index);
elessair 0:f269e3021894 152 uint32_t temp = gpio->PUPDR;
elessair 0:f269e3021894 153 uint32_t pull = (temp >> (pin_index * 2U)) & GPIO_PUPDR_PUPDR0;
elessair 0:f269e3021894 154
elessair 0:f269e3021894 155 /* Then re-use global function for updating the mode part*/
elessair 0:f269e3021894 156 pin_function(pin, STM_PIN_DATA(gpiomode, pull, 0));
elessair 0:f269e3021894 157 }