mbed library sources
Dependents: frdm_kl05z_gpio_test
Fork of mbed-src by
targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/pinmap.c
- Committer:
- mbed_official
- Date:
- 2013-12-02
- Revision:
- 52:a51c77007319
- Child:
- 58:3b55b7a41411
File content as of revision 52:a51c77007319:
/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "pinmap.h" #include "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_Remap_I2C1 // 7 }; /** * Set the pin function (input, output, alternate function or analog) + output speed + AF */ void pin_function(PinName pin, int data) { if (pin == NC) return; // Get the pin mode and alternate-function number uint32_t mode = STM_PIN_MODE(data); uint32_t afnum = STM_PIN_AFNUM(data); // Get GPIO structure base address uint32_t pin_number = (uint32_t)pin; uint32_t pin_index = (pin_number & 0xF); uint32_t port_index = (pin_number >> 4); GPIO_TypeDef *gpio = ((GPIO_TypeDef *)(GPIOA_BASE + (port_index << 10))); // Enable GPIO and AFIO clocks RCC_APB2PeriphClockCmd((uint32_t)(RCC_APB2Periph_GPIOA << port_index), ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, 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); // Configure Alternate Function if (afnum > 0) { GPIO_PinRemapConfig(AF_mapping[afnum], ENABLE); } // 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); } } /** * Set the pin mode (open-drain/push-pull + pull-up/pull-down) */ void pin_mode(PinName pin, PinMode mode) { if (pin == NC) return; GPIO_InitTypeDef GPIO_InitStructure; // Get GPIO structure base address uint32_t pin_number = (uint32_t)pin; uint32_t pin_index = (pin_number & 0xF); uint32_t port_index = (pin_number >> 4); GPIO_TypeDef *gpio = ((GPIO_TypeDef *)(GPIOA_BASE + (port_index << 10))); // Enable GPIO clock RCC_APB2PeriphClockCmd((uint32_t)(RCC_APB2Periph_GPIOA << port_index), ENABLE); // 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); }