Julien Cassette / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by mbed official

targets/hal/TARGET_STM/TARGET_STM32L0/pinmap.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 *******************************************************************************
bogdanm 0:9b334a45a8ff 3 * Copyright (c) 2015, STMicroelectronics
bogdanm 0:9b334a45a8ff 4 * All rights reserved.
bogdanm 0:9b334a45a8ff 5 *
bogdanm 0:9b334a45a8ff 6 * Redistribution and use in source and binary forms, with or without
bogdanm 0:9b334a45a8ff 7 * modification, are permitted provided that the following conditions are met:
bogdanm 0:9b334a45a8ff 8 *
bogdanm 0:9b334a45a8ff 9 * 1. Redistributions of source code must retain the above copyright notice,
bogdanm 0:9b334a45a8ff 10 * this list of conditions and the following disclaimer.
bogdanm 0:9b334a45a8ff 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
bogdanm 0:9b334a45a8ff 12 * this list of conditions and the following disclaimer in the documentation
bogdanm 0:9b334a45a8ff 13 * and/or other materials provided with the distribution.
bogdanm 0:9b334a45a8ff 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
bogdanm 0:9b334a45a8ff 15 * may be used to endorse or promote products derived from this software
bogdanm 0:9b334a45a8ff 16 * without specific prior written permission.
bogdanm 0:9b334a45a8ff 17 *
bogdanm 0:9b334a45a8ff 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
bogdanm 0:9b334a45a8ff 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
bogdanm 0:9b334a45a8ff 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
bogdanm 0:9b334a45a8ff 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
bogdanm 0:9b334a45a8ff 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
bogdanm 0:9b334a45a8ff 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
bogdanm 0:9b334a45a8ff 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
bogdanm 0:9b334a45a8ff 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
bogdanm 0:9b334a45a8ff 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
bogdanm 0:9b334a45a8ff 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bogdanm 0:9b334a45a8ff 28 *******************************************************************************
bogdanm 0:9b334a45a8ff 29 */
bogdanm 0:9b334a45a8ff 30 #include "mbed_assert.h"
bogdanm 0:9b334a45a8ff 31 #include "pinmap.h"
bogdanm 0:9b334a45a8ff 32 #include "PortNames.h"
bogdanm 0:9b334a45a8ff 33 #include "mbed_error.h"
bogdanm 0:9b334a45a8ff 34
bogdanm 0:9b334a45a8ff 35 // GPIO mode look-up table
bogdanm 0:9b334a45a8ff 36 // Warning: order must be the same as the one defined in PinNames.h !!!
bogdanm 0:9b334a45a8ff 37 static const uint32_t gpio_mode[13] = {
bogdanm 0:9b334a45a8ff 38 0x00000000, // 0 = GPIO_MODE_INPUT
bogdanm 0:9b334a45a8ff 39 0x00000001, // 1 = GPIO_MODE_OUTPUT_PP
bogdanm 0:9b334a45a8ff 40 0x00000011, // 2 = GPIO_MODE_OUTPUT_OD
bogdanm 0:9b334a45a8ff 41 0x00000002, // 3 = GPIO_MODE_AF_PP
bogdanm 0:9b334a45a8ff 42 0x00000012, // 4 = GPIO_MODE_AF_OD
bogdanm 0:9b334a45a8ff 43 0x00000003, // 5 = GPIO_MODE_ANALOG
bogdanm 0:9b334a45a8ff 44 0x10110000, // 6 = GPIO_MODE_IT_RISING
bogdanm 0:9b334a45a8ff 45 0x10210000, // 7 = GPIO_MODE_IT_FALLING
bogdanm 0:9b334a45a8ff 46 0x10310000, // 8 = GPIO_MODE_IT_RISING_FALLING
bogdanm 0:9b334a45a8ff 47 0x10120000, // 9 = GPIO_MODE_EVT_RISING
bogdanm 0:9b334a45a8ff 48 0x10220000, // 10 = GPIO_MODE_EVT_FALLING
bogdanm 0:9b334a45a8ff 49 0x10320000, // 11 = GPIO_MODE_EVT_RISING_FALLING
bogdanm 0:9b334a45a8ff 50 0x10000000 // 12 = Reset IT and EVT (not in STM32Cube HAL)
bogdanm 0:9b334a45a8ff 51 };
bogdanm 0:9b334a45a8ff 52
bogdanm 0:9b334a45a8ff 53 // Enable GPIO clock and return GPIO base address
bogdanm 0:9b334a45a8ff 54 uint32_t Set_GPIO_Clock(uint32_t port_idx)
bogdanm 0:9b334a45a8ff 55 {
bogdanm 0:9b334a45a8ff 56 uint32_t gpio_add = 0;
bogdanm 0:9b334a45a8ff 57 switch (port_idx) {
bogdanm 0:9b334a45a8ff 58 case PortA:
bogdanm 0:9b334a45a8ff 59 gpio_add = GPIOA_BASE;
bogdanm 0:9b334a45a8ff 60 __GPIOA_CLK_ENABLE();
bogdanm 0:9b334a45a8ff 61 break;
bogdanm 0:9b334a45a8ff 62 case PortB:
bogdanm 0:9b334a45a8ff 63 gpio_add = GPIOB_BASE;
bogdanm 0:9b334a45a8ff 64 __GPIOB_CLK_ENABLE();
bogdanm 0:9b334a45a8ff 65 break;
bogdanm 0:9b334a45a8ff 66 #if defined(GPIOC_BASE)
bogdanm 0:9b334a45a8ff 67 case PortC:
bogdanm 0:9b334a45a8ff 68 gpio_add = GPIOC_BASE;
bogdanm 0:9b334a45a8ff 69 __GPIOC_CLK_ENABLE();
bogdanm 0:9b334a45a8ff 70 break;
bogdanm 0:9b334a45a8ff 71 #endif
bogdanm 0:9b334a45a8ff 72 #if defined(GPIOD_BASE)
bogdanm 0:9b334a45a8ff 73 case PortD:
bogdanm 0:9b334a45a8ff 74 gpio_add = GPIOD_BASE;
bogdanm 0:9b334a45a8ff 75 __GPIOD_CLK_ENABLE();
bogdanm 0:9b334a45a8ff 76 break;
bogdanm 0:9b334a45a8ff 77 #endif
bogdanm 0:9b334a45a8ff 78 #if defined(GPIOH_BASE)
bogdanm 0:9b334a45a8ff 79 case PortH:
bogdanm 0:9b334a45a8ff 80 gpio_add = GPIOH_BASE;
bogdanm 0:9b334a45a8ff 81 __GPIOH_CLK_ENABLE();
bogdanm 0:9b334a45a8ff 82 break;
bogdanm 0:9b334a45a8ff 83 #endif
bogdanm 0:9b334a45a8ff 84 default:
bogdanm 0:9b334a45a8ff 85 error("Pinmap error: wrong port number.");
bogdanm 0:9b334a45a8ff 86 break;
bogdanm 0:9b334a45a8ff 87 }
bogdanm 0:9b334a45a8ff 88 return gpio_add;
bogdanm 0:9b334a45a8ff 89 }
bogdanm 0:9b334a45a8ff 90
bogdanm 0:9b334a45a8ff 91 /**
bogdanm 0:9b334a45a8ff 92 * Configure pin (mode, speed, output type and pull-up/pull-down)
bogdanm 0:9b334a45a8ff 93 */
bogdanm 0:9b334a45a8ff 94 void pin_function(PinName pin, int data)
bogdanm 0:9b334a45a8ff 95 {
bogdanm 0:9b334a45a8ff 96 MBED_ASSERT(pin != (PinName)NC);
bogdanm 0:9b334a45a8ff 97 // Get the pin informations
bogdanm 0:9b334a45a8ff 98 uint32_t mode = STM_PIN_MODE(data);
bogdanm 0:9b334a45a8ff 99 uint32_t pupd = STM_PIN_PUPD(data);
bogdanm 0:9b334a45a8ff 100 uint32_t afnum = STM_PIN_AFNUM(data);
bogdanm 0:9b334a45a8ff 101
bogdanm 0:9b334a45a8ff 102 uint32_t port_index = STM_PORT(pin);
bogdanm 0:9b334a45a8ff 103 uint32_t pin_index = STM_PIN(pin);
bogdanm 0:9b334a45a8ff 104
bogdanm 0:9b334a45a8ff 105 // Enable GPIO clock
bogdanm 0:9b334a45a8ff 106 uint32_t gpio_add = Set_GPIO_Clock(port_index);
bogdanm 0:9b334a45a8ff 107 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
bogdanm 0:9b334a45a8ff 108
bogdanm 0:9b334a45a8ff 109 // Configure GPIO
bogdanm 0:9b334a45a8ff 110 GPIO_InitTypeDef GPIO_InitStructure;
bogdanm 0:9b334a45a8ff 111 GPIO_InitStructure.Pin = (uint32_t)(1 << pin_index);
bogdanm 0:9b334a45a8ff 112 GPIO_InitStructure.Mode = gpio_mode[mode];
bogdanm 0:9b334a45a8ff 113 GPIO_InitStructure.Pull = pupd;
bogdanm 0:9b334a45a8ff 114 GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
bogdanm 0:9b334a45a8ff 115 GPIO_InitStructure.Alternate = afnum;
bogdanm 0:9b334a45a8ff 116 HAL_GPIO_Init(gpio, &GPIO_InitStructure);
bogdanm 0:9b334a45a8ff 117
bogdanm 0:9b334a45a8ff 118 // [TODO] Disconnect JTAG-DP + SW-DP signals.
bogdanm 0:9b334a45a8ff 119 // Warning: Need to reconnect under reset
bogdanm 0:9b334a45a8ff 120 //if ((pin == PA_13) || (pin == PA_14)) {
bogdanm 0:9b334a45a8ff 121 //
bogdanm 0:9b334a45a8ff 122 //}
bogdanm 0:9b334a45a8ff 123 //if ((pin == PA_15) || (pin == PB_3) || (pin == PB_4)) {
bogdanm 0:9b334a45a8ff 124 //
bogdanm 0:9b334a45a8ff 125 //}
bogdanm 0:9b334a45a8ff 126 }
bogdanm 0:9b334a45a8ff 127
bogdanm 0:9b334a45a8ff 128 /**
bogdanm 0:9b334a45a8ff 129 * Configure pin pull-up/pull-down
bogdanm 0:9b334a45a8ff 130 */
bogdanm 0:9b334a45a8ff 131 void pin_mode(PinName pin, PinMode mode)
bogdanm 0:9b334a45a8ff 132 {
bogdanm 0:9b334a45a8ff 133 MBED_ASSERT(pin != (PinName)NC);
bogdanm 0:9b334a45a8ff 134 uint32_t port_index = STM_PORT(pin);
bogdanm 0:9b334a45a8ff 135 uint32_t pin_index = STM_PIN(pin);
bogdanm 0:9b334a45a8ff 136
bogdanm 0:9b334a45a8ff 137 // Enable GPIO clock
bogdanm 0:9b334a45a8ff 138 uint32_t gpio_add = Set_GPIO_Clock(port_index);
bogdanm 0:9b334a45a8ff 139 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
bogdanm 0:9b334a45a8ff 140
bogdanm 0:9b334a45a8ff 141 // Configure pull-up/pull-down resistors
bogdanm 0:9b334a45a8ff 142 uint32_t pupd = (uint32_t)mode;
bogdanm 0:9b334a45a8ff 143 if (pupd > 2)
bogdanm 0:9b334a45a8ff 144 {
bogdanm 0:9b334a45a8ff 145 pupd = 0; // Open-drain = No pull-up/No pull-down
bogdanm 0:9b334a45a8ff 146 }
bogdanm 0:9b334a45a8ff 147 gpio->PUPDR &= (uint32_t)(~(GPIO_PUPDR_PUPD0 << (pin_index * 2)));
bogdanm 0:9b334a45a8ff 148 gpio->PUPDR |= (uint32_t)(pupd << (pin_index * 2));
bogdanm 0:9b334a45a8ff 149
bogdanm 0:9b334a45a8ff 150 }