mirror of https://github.com/ARMmbed/mbed-os.git
136 lines
4.9 KiB
C
136 lines
4.9 KiB
C
/* mbed Microcontroller Library
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*******************************************************************************
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* Copyright (c) 2014, STMicroelectronics
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*******************************************************************************
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*/
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#include "mbed_assert.h"
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#include "pinmap.h"
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#include "PortNames.h"
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#include "mbed_error.h"
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// Enable GPIO clock and return GPIO base address
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uint32_t Set_GPIO_Clock(uint32_t port_idx) {
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uint32_t gpio_add;
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switch (port_idx) {
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case PortA:
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gpio_add = GPIOA_BASE;
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
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break;
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case PortB:
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gpio_add = GPIOB_BASE;
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
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break;
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case PortC:
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gpio_add = GPIOC_BASE;
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);
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break;
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case PortD:
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gpio_add = GPIOD_BASE;
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOD, ENABLE);
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break;
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case PortE:
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gpio_add = GPIOE_BASE;
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOE, ENABLE);
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break;
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case PortF:
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gpio_add = GPIOF_BASE;
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOF, ENABLE);
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break;
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default:
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gpio_add = 0;
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error("Port number is not correct.");
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break;
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}
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return gpio_add;
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}
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/**
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* Configure pin (mode, speed, output type and pull-up/pull-down)
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*/
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void pin_function(PinName pin, int data) {
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MBED_ASSERT(pin != (PinName)NC);
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// Get the pin informations
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uint32_t mode = STM_PIN_MODE(data);
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uint32_t otype = STM_PIN_OTYPE(data);
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uint32_t pupd = STM_PIN_PUPD(data);
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uint32_t afnum = STM_PIN_AFNUM(data);
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uint32_t port_index = STM_PORT(pin);
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uint32_t pin_index = STM_PIN(pin);
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// Enable GPIO clock
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uint32_t gpio_add = Set_GPIO_Clock(port_index);
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GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
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// Configure Alternate Function
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// Warning: Must be done before the GPIO is initialized
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if (afnum != 0xFF) {
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GPIO_PinAFConfig(gpio, (uint16_t)pin_index, afnum);
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}
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// Configure GPIO
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GPIO_InitTypeDef GPIO_InitStructure;
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GPIO_InitStructure.GPIO_Pin = (uint16_t)(1 << pin_index);
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GPIO_InitStructure.GPIO_Mode = (GPIOMode_TypeDef)mode;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_3;
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GPIO_InitStructure.GPIO_OType = (GPIOOType_TypeDef)otype;
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GPIO_InitStructure.GPIO_PuPd = (GPIOPuPd_TypeDef)pupd;
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GPIO_Init(gpio, &GPIO_InitStructure);
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// [TODO] Disconnect JTAG-DP + SW-DP signals.
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// Warning: Need to reconnect under reset
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//if ((pin == PA_13) || (pin == PA_14)) {
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//
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//}
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//if ((pin == PA_15) || (pin == PB_3) || (pin == PB_4)) {
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//
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//}
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}
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/**
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* Configure pin pull-up/pull-down
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*/
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void pin_mode(PinName pin, PinMode mode) {
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MBED_ASSERT(pin != (PinName)NC);
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uint32_t port_index = STM_PORT(pin);
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uint32_t pin_index = STM_PIN(pin);
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// Enable GPIO clock
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uint32_t gpio_add = Set_GPIO_Clock(port_index);
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GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
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// Configure pull-up/pull-down resistors
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uint32_t pupd = (uint32_t)mode;
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if (pupd > 2)
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pupd = 0; // Open-drain = No pull-up/No pull-down
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gpio->PUPDR &= (uint32_t)(~(GPIO_PUPDR_PUPDR0 << (pin_index * 2)));
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gpio->PUPDR |= (uint32_t)(pupd << (pin_index * 2));
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}
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