eunkyoung kim / mbed-src

mbed library sources modify the rtc/i2c

Dependents:   SSD1306_smart_watch

Fork of mbed-src by eunkyoung kim

targets/hal/TARGET_STM/TARGET_STM32F0/pinmap.c@577:545d200432a1, 2015-06-29 (annotated)

Committer:
eunkyoungkim
Date:
Mon Jun 29 05:49:52 2015 +0000
Revision:
577:545d200432a1
Parent:
469:fc4922e0c183 
modify the i2c.c/i2c.h

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 441:d2c15dda23c1 1 /* mbed Microcontroller Library
mbed_official 441:d2c15dda23c1 2 *******************************************************************************
mbed_official 441:d2c15dda23c1 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 441:d2c15dda23c1 4 * All rights reserved.
mbed_official 441:d2c15dda23c1 5 *
mbed_official 441:d2c15dda23c1 6 * Redistribution and use in source and binary forms, with or without
mbed_official 441:d2c15dda23c1 7 * modification, are permitted provided that the following conditions are met:
mbed_official 441:d2c15dda23c1 8 *
mbed_official 441:d2c15dda23c1 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 441:d2c15dda23c1 10 * this list of conditions and the following disclaimer.
mbed_official 441:d2c15dda23c1 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 441:d2c15dda23c1 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 441:d2c15dda23c1 13 * and/or other materials provided with the distribution.
mbed_official 441:d2c15dda23c1 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 441:d2c15dda23c1 15 * may be used to endorse or promote products derived from this software
mbed_official 441:d2c15dda23c1 16 * without specific prior written permission.
mbed_official 441:d2c15dda23c1 17 *
mbed_official 441:d2c15dda23c1 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 441:d2c15dda23c1 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 441:d2c15dda23c1 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 441:d2c15dda23c1 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 441:d2c15dda23c1 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 441:d2c15dda23c1 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 441:d2c15dda23c1 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 441:d2c15dda23c1 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 441:d2c15dda23c1 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 441:d2c15dda23c1 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 441:d2c15dda23c1 28 *******************************************************************************
mbed_official 441:d2c15dda23c1 29 */
mbed_official 441:d2c15dda23c1 30 #include "mbed_assert.h"
mbed_official 441:d2c15dda23c1 31 #include "pinmap.h"
mbed_official 441:d2c15dda23c1 32 #include "PortNames.h"
mbed_official 441:d2c15dda23c1 33 #include "mbed_error.h"
mbed_official 441:d2c15dda23c1 34
mbed_official 441:d2c15dda23c1 35 // GPIO mode look-up table
mbed_official 441:d2c15dda23c1 36 static const uint32_t gpio_mode[13] = {
mbed_official 441:d2c15dda23c1 37 0x00000000, // 0 = GPIO_MODE_INPUT
mbed_official 441:d2c15dda23c1 38 0x00000001, // 1 = GPIO_MODE_OUTPUT_PP
mbed_official 441:d2c15dda23c1 39 0x00000011, // 2 = GPIO_MODE_OUTPUT_OD
mbed_official 441:d2c15dda23c1 40 0x00000002, // 3 = GPIO_MODE_AF_PP
mbed_official 441:d2c15dda23c1 41 0x00000012, // 4 = GPIO_MODE_AF_OD
mbed_official 441:d2c15dda23c1 42 0x00000003, // 5 = GPIO_MODE_ANALOG
mbed_official 441:d2c15dda23c1 43 0x10110000, // 6 = GPIO_MODE_IT_RISING
mbed_official 441:d2c15dda23c1 44 0x10210000, // 7 = GPIO_MODE_IT_FALLING
mbed_official 441:d2c15dda23c1 45 0x10310000, // 8 = GPIO_MODE_IT_RISING_FALLING
mbed_official 441:d2c15dda23c1 46 0x10120000, // 9 = GPIO_MODE_EVT_RISING
mbed_official 441:d2c15dda23c1 47 0x10220000, // 10 = GPIO_MODE_EVT_FALLING
mbed_official 441:d2c15dda23c1 48 0x10320000, // 11 = GPIO_MODE_EVT_RISING_FALLING
mbed_official 441:d2c15dda23c1 49 0x10000000 // 12 = Reset IT and EVT (not in STM32Cube HAL)
mbed_official 441:d2c15dda23c1 50 };
mbed_official 441:d2c15dda23c1 51
mbed_official 441:d2c15dda23c1 52 // Enable GPIO clock and return GPIO base address
mbed_official 441:d2c15dda23c1 53 uint32_t Set_GPIO_Clock(uint32_t port_idx)
mbed_official 441:d2c15dda23c1 54 {
mbed_official 441:d2c15dda23c1 55 uint32_t gpio_add = 0;
mbed_official 441:d2c15dda23c1 56 switch (port_idx) {
mbed_official 441:d2c15dda23c1 57 case PortA:
mbed_official 441:d2c15dda23c1 58 gpio_add = GPIOA_BASE;
mbed_official 441:d2c15dda23c1 59 __GPIOA_CLK_ENABLE();
mbed_official 441:d2c15dda23c1 60 break;
mbed_official 441:d2c15dda23c1 61 case PortB:
mbed_official 441:d2c15dda23c1 62 gpio_add = GPIOB_BASE;
mbed_official 441:d2c15dda23c1 63 __GPIOB_CLK_ENABLE();
mbed_official 441:d2c15dda23c1 64 break;
mbed_official 441:d2c15dda23c1 65 case PortC:
mbed_official 441:d2c15dda23c1 66 gpio_add = GPIOC_BASE;
mbed_official 441:d2c15dda23c1 67 __GPIOC_CLK_ENABLE();
mbed_official 441:d2c15dda23c1 68 break;
mbed_official 441:d2c15dda23c1 69 case PortD:
mbed_official 441:d2c15dda23c1 70 gpio_add = GPIOD_BASE;
mbed_official 441:d2c15dda23c1 71 __GPIOD_CLK_ENABLE();
mbed_official 441:d2c15dda23c1 72 break;
mbed_official 441:d2c15dda23c1 73 case PortF:
mbed_official 441:d2c15dda23c1 74 gpio_add = GPIOF_BASE;
mbed_official 441:d2c15dda23c1 75 __GPIOF_CLK_ENABLE();
mbed_official 441:d2c15dda23c1 76 break;
mbed_official 441:d2c15dda23c1 77 default:
mbed_official 441:d2c15dda23c1 78 error("Pinmap error: wrong port number.");
mbed_official 441:d2c15dda23c1 79 break;
mbed_official 441:d2c15dda23c1 80 }
mbed_official 441:d2c15dda23c1 81 return gpio_add;
mbed_official 441:d2c15dda23c1 82 }
mbed_official 441:d2c15dda23c1 83
mbed_official 441:d2c15dda23c1 84 /**
mbed_official 441:d2c15dda23c1 85 * Configure pin (mode, speed, output type and pull-up/pull-down)
mbed_official 441:d2c15dda23c1 86 */
mbed_official 441:d2c15dda23c1 87 void pin_function(PinName pin, int data)
mbed_official 441:d2c15dda23c1 88 {
mbed_official 441:d2c15dda23c1 89 MBED_ASSERT(pin != (PinName)NC);
mbed_official 441:d2c15dda23c1 90
mbed_official 441:d2c15dda23c1 91 // Get the pin informations
mbed_official 441:d2c15dda23c1 92 uint32_t mode = STM_PIN_MODE(data);
mbed_official 441:d2c15dda23c1 93 uint32_t pupd = STM_PIN_PUPD(data);
mbed_official 441:d2c15dda23c1 94 uint32_t afnum = STM_PIN_AFNUM(data);
mbed_official 441:d2c15dda23c1 95
mbed_official 441:d2c15dda23c1 96 uint32_t port_index = STM_PORT(pin);
mbed_official 441:d2c15dda23c1 97 uint32_t pin_index = STM_PIN(pin);
mbed_official 441:d2c15dda23c1 98
mbed_official 441:d2c15dda23c1 99 // Enable GPIO clock
mbed_official 441:d2c15dda23c1 100 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 441:d2c15dda23c1 101 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
mbed_official 441:d2c15dda23c1 102
mbed_official 441:d2c15dda23c1 103 // Configure GPIO
mbed_official 441:d2c15dda23c1 104 GPIO_InitTypeDef GPIO_InitStructure;
mbed_official 441:d2c15dda23c1 105 GPIO_InitStructure.Pin = (uint32_t)(1 << pin_index);
mbed_official 441:d2c15dda23c1 106 GPIO_InitStructure.Mode = gpio_mode[mode];
mbed_official 441:d2c15dda23c1 107 GPIO_InitStructure.Pull = pupd;
mbed_official 441:d2c15dda23c1 108 GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
mbed_official 441:d2c15dda23c1 109 GPIO_InitStructure.Alternate = afnum;
mbed_official 441:d2c15dda23c1 110 HAL_GPIO_Init(gpio, &GPIO_InitStructure);
mbed_official 441:d2c15dda23c1 111
mbed_official 441:d2c15dda23c1 112 // [TODO] Disconnect SWDIO and SWCLK signals ?
mbed_official 441:d2c15dda23c1 113 // Warning: For debugging it is necessary to reconnect under reset if this is done.
mbed_official 441:d2c15dda23c1 114 //if ((pin == PA_13) || (pin == PA_14)) {
mbed_official 441:d2c15dda23c1 115 //
mbed_official 441:d2c15dda23c1 116 //}
mbed_official 441:d2c15dda23c1 117 }
mbed_official 441:d2c15dda23c1 118
mbed_official 441:d2c15dda23c1 119 /**
mbed_official 441:d2c15dda23c1 120 * Configure pin pull-up/pull-down
mbed_official 441:d2c15dda23c1 121 */
mbed_official 441:d2c15dda23c1 122 void pin_mode(PinName pin, PinMode mode)
mbed_official 441:d2c15dda23c1 123 {
mbed_official 441:d2c15dda23c1 124 MBED_ASSERT(pin != (PinName)NC);
mbed_official 441:d2c15dda23c1 125
mbed_official 441:d2c15dda23c1 126 uint32_t port_index = STM_PORT(pin);
mbed_official 441:d2c15dda23c1 127 uint32_t pin_index = STM_PIN(pin);
mbed_official 441:d2c15dda23c1 128
mbed_official 441:d2c15dda23c1 129 // Enable GPIO clock
mbed_official 441:d2c15dda23c1 130 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 441:d2c15dda23c1 131 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
mbed_official 441:d2c15dda23c1 132
mbed_official 441:d2c15dda23c1 133 // Configure pull-up/pull-down resistors
mbed_official 441:d2c15dda23c1 134 uint32_t pupd = (uint32_t)mode;
mbed_official 441:d2c15dda23c1 135 if (pupd > 2) pupd = 0; // Open-drain = No pull-up/No pull-down
mbed_official 441:d2c15dda23c1 136 gpio->PUPDR &= (uint32_t)(~(GPIO_PUPDR_PUPDR0 << (pin_index * 2)));
mbed_official 441:d2c15dda23c1 137 gpio->PUPDR |= (uint32_t)(pupd << (pin_index * 2));
mbed_official 441:d2c15dda23c1 138
mbed_official 441:d2c15dda23c1 139 }