mbed library sources
Fork of mbed-src by
targets/hal/TARGET_STM/TARGET_DISCO_F100RB/pinmap.c
- Committer:
- mbed_official
- Date:
- 2014-08-15
- Revision:
- 285:31249416b6f9
- Parent:
- 251:de9a1e4ffd79
File content as of revision 285:31249416b6f9:
/* mbed Microcontroller Library ******************************************************************************* * Copyright (c) 2014, STMicroelectronics * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. Neither the name of STMicroelectronics nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ******************************************************************************* */ #include "mbed_assert.h" #include "device.h" #include "pinmap.h" #include "mbed_error.h" // Alternate-function mapping static const uint32_t AF_mapping[] = { 0, // 0 = No AF GPIO_Remap_SPI1, // 1 GPIO_Remap_I2C1, // 2 GPIO_Remap_USART1, // 3 GPIO_Remap_USART2, // 4 GPIO_FullRemap_TIM2, // 5 GPIO_FullRemap_TIM3, // 6 GPIO_PartialRemap_TIM3, // 7 GPIO_Remap_I2C1 // 8 }; // Enable GPIO clock and return GPIO base address uint32_t Set_GPIO_Clock(uint32_t port_idx) { uint32_t gpio_add = 0; switch (port_idx) { case PortA: gpio_add = GPIOA_BASE; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); break; case PortB: gpio_add = GPIOB_BASE; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); break; case PortC: gpio_add = GPIOC_BASE; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); break; case PortD: gpio_add = GPIOD_BASE; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE); break; default: error("Port number is not correct."); break; } return gpio_add; } /** * Configure pin (input, output, alternate function or analog) + output speed + AF */ void pin_function(PinName pin, int data) { MBED_ASSERT(pin != (PinName)NC); // Get the pin informations uint32_t mode = STM_PIN_MODE(data); uint32_t afnum = STM_PIN_AFNUM(data); uint32_t port_index = STM_PORT(pin); uint32_t pin_index = STM_PIN(pin); // Enable GPIO clock uint32_t gpio_add = Set_GPIO_Clock(port_index); GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add; // Enable AFIO clock RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); // Configure Alternate Function // Warning: Must be done before the GPIO is initialized if (afnum > 0) { GPIO_PinRemapConfig(AF_mapping[afnum], ENABLE); } // Configure GPIO GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Pin = (uint16_t)(1 << pin_index); GPIO_InitStructure.GPIO_Mode = (GPIOMode_TypeDef)mode; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(gpio, &GPIO_InitStructure); // Disconnect JTAG-DP + SW-DP signals. // Warning: Need to reconnect under reset if ((pin == PA_13) || (pin == PA_14)) { GPIO_PinRemapConfig(GPIO_Remap_SWJ_Disable, ENABLE); } if ((pin == PA_15) || (pin == PB_3) || (pin == PB_4)) { GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE); } } /** * Configure pin pull-up/pull-down */ void pin_mode(PinName pin, PinMode mode) { MBED_ASSERT(pin != (PinName)NC); GPIO_InitTypeDef GPIO_InitStructure; uint32_t port_index = STM_PORT(pin); uint32_t pin_index = STM_PIN(pin); // Enable GPIO clock uint32_t gpio_add = Set_GPIO_Clock(port_index); GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add; // Configure open-drain and pull-up/down switch (mode) { case PullNone: return; case PullUp: GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; break; case PullDown: GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; break; case OpenDrain: if (pin_index < 8) { if ((gpio->CRL & (0x03 << (pin_index * 4))) > 0) { // MODE bits = Output mode gpio->CRL |= (0x04 << (pin_index * 4)); // Set open-drain } } else { if ((gpio->CRH & (0x03 << ((pin_index % 8) * 4))) > 0) { // MODE bits = Output mode gpio->CRH |= (0x04 << ((pin_index % 8) * 4)); // Set open-drain } } return; default: break; } // Configure GPIO GPIO_InitStructure.GPIO_Pin = (uint16_t)(1 << pin_index); GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(gpio, &GPIO_InitStructure); }