257 lines
7.1 KiB
C
Executable File
257 lines
7.1 KiB
C
Executable File
/**
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******************************************************************************
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* @file stm32f0_discovery.c
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* @author MCD Application Team
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* @version V1.0.0
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* @date 23-March-2012
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* @brief This file provides set of firmware functions to manage Leds and
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* push-button available on STM32F0-DISCOVERY Kit from STMicroelectronics.
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT 2012 STMicroelectronics</center></h2>
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*
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* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
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* You may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.st.com/software_license_agreement_liberty_v2
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f0_discovery.h"
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/** @addtogroup Utilities
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* @{
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*/
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/** @addtogroup STM32F0_DISCOVERY
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* @{
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*/
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/** @defgroup STM32F0_DISCOVERY_LOW_LEVEL
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* @brief This file provides firmware functions to manage Leds and push-buttons,
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* available on STM32F0_DISCOVERY evaluation board from STMicroelectronics.
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* @{
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*/
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/** @defgroup STM32F0_DISCOVERY_LOW_LEVEL_Private_TypesDefinitions
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup STM32F0_DISCOVERY_LOW_LEVEL_Private_Defines
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup STM32F0_DISCOVERY_LOW_LEVEL_Private_Macros
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup STM32F0_DISCOVERY_LOW_LEVEL_Private_Variables
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* @{
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*/
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GPIO_TypeDef* GPIO_PORT[LEDn] = {LED3_GPIO_PORT, LED4_GPIO_PORT};
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const uint16_t GPIO_PIN[LEDn] = {LED3_PIN, LED4_PIN};
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const uint32_t GPIO_CLK[LEDn] = {LED3_GPIO_CLK, LED4_GPIO_CLK};
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GPIO_TypeDef* BUTTON_PORT[BUTTONn] = {USER_BUTTON_GPIO_PORT};
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const uint16_t BUTTON_PIN[BUTTONn] = {USER_BUTTON_PIN};
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const uint32_t BUTTON_CLK[BUTTONn] = {USER_BUTTON_GPIO_CLK};
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const uint16_t BUTTON_EXTI_LINE[BUTTONn] = {USER_BUTTON_EXTI_LINE};
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const uint16_t BUTTON_PORT_SOURCE[BUTTONn] = {USER_BUTTON_EXTI_PORT_SOURCE};
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const uint16_t BUTTON_PIN_SOURCE[BUTTONn] = {USER_BUTTON_EXTI_PIN_SOURCE};
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const uint16_t BUTTON_IRQn[BUTTONn] = {USER_BUTTON_EXTI_IRQn};
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/**
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* @}
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*/
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/** @defgroup STM32F0_DISCOVERY_LOW_LEVEL_Private_FunctionPrototypes
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup STM32F0_DISCOVERY_LOW_LEVEL_Private_Functions
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* @{
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*/
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/**
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* @brief Configures LED GPIO.
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* @param Led: Specifies the Led to be configured.
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* This parameter can be one of following parameters:
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* @arg LED3
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* @arg LED4
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* @retval None
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*/
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void STM_EVAL_LEDInit(Led_TypeDef Led)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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/* Enable the GPIO_LED Clock */
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RCC_AHBPeriphClockCmd(GPIO_CLK[Led], ENABLE);
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/* Configure the GPIO_LED pin */
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GPIO_InitStructure.GPIO_Pin = GPIO_PIN[Led];
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(GPIO_PORT[Led], &GPIO_InitStructure);
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}
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/**
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* @brief Turns selected LED On.
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* @param Led: Specifies the Led to be set on.
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* This parameter can be one of following parameters:
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* @arg LED3
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* @arg LED4
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* @retval None
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*/
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void STM_EVAL_LEDOn(Led_TypeDef Led)
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{
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GPIO_PORT[Led]->BSRR = GPIO_PIN[Led];
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}
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/**
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* @brief Turns selected LED Off.
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* @param Led: Specifies the Led to be set off.
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* This parameter can be one of following parameters:
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* @arg LED3
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* @arg LED4
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* @retval None
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*/
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void STM_EVAL_LEDOff(Led_TypeDef Led)
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{
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GPIO_PORT[Led]->BRR = GPIO_PIN[Led];
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}
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/**
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* @brief Toggles the selected LED.
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* @param Led: Specifies the Led to be toggled.
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* This parameter can be one of following parameters:
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* @arg LED3
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* @arg LED4
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* @retval None
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*/
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void STM_EVAL_LEDToggle(Led_TypeDef Led)
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{
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GPIO_PORT[Led]->ODR ^= GPIO_PIN[Led];
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}
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/**
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* @brief Configures Button GPIO and EXTI Line.
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* @param Button: Specifies the Button to be configured.
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* This parameter can be:
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* @arg BUTTON_USER: User Push Button
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* @param Button_Mode: Specifies Button mode.
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* This parameter can be one of following parameters:
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* @arg BUTTON_MODE_GPIO: Button will be used as simple IO
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* @arg BUTTON_MODE_EXTI: Button will be connected to EXTI line with interrupt
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* generation capability
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* @retval None
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*/
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void STM_EVAL_PBInit(Button_TypeDef Button, ButtonMode_TypeDef Button_Mode)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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EXTI_InitTypeDef EXTI_InitStructure;
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NVIC_InitTypeDef NVIC_InitStructure;
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/* Enable the BUTTON Clock */
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RCC_AHBPeriphClockCmd(BUTTON_CLK[Button], ENABLE);
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
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/* Configure Button pin as input */
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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GPIO_InitStructure.GPIO_Pin = BUTTON_PIN[Button];
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GPIO_Init(BUTTON_PORT[Button], &GPIO_InitStructure);
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if (Button_Mode == BUTTON_MODE_EXTI)
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{
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/* Connect Button EXTI Line to Button GPIO Pin */
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SYSCFG_EXTILineConfig(BUTTON_PORT_SOURCE[Button], BUTTON_PIN_SOURCE[Button]);
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/* Configure Button EXTI line */
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EXTI_InitStructure.EXTI_Line = BUTTON_EXTI_LINE[Button];
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EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
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if (Button != BUTTON_USER)
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{
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EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
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}
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else
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{
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EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
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}
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EXTI_InitStructure.EXTI_LineCmd = ENABLE;
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EXTI_Init(&EXTI_InitStructure);
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/* Enable and set Button EXTI Interrupt to the lowest priority */
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NVIC_InitStructure.NVIC_IRQChannel = BUTTON_IRQn[Button];
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NVIC_InitStructure.NVIC_IRQChannelPriority = 0x03;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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}
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}
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/**
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* @brief Returns the selected Button state.
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* @param Button: Specifies the Button to be checked.
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* This parameter can be one of following parameters:
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* @arg BUTTON_USER: User Push Button
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* @retval The Button GPIO pin value.
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*/
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uint32_t STM_EVAL_PBGetState(Button_TypeDef Button)
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{
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/* There is no Wakeup button on STM32f0-Discovery Kit */
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return GPIO_ReadInputDataBit(BUTTON_PORT[Button], BUTTON_PIN[Button]);
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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