mbed library sources modified for open wear
Dependents: openwear-lifelogger-example
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targets/cmsis/TARGET_STM/TARGET_NUCLEO_L152RE/stm32l1xx_gpio.c
- Committer:
- mbed_official
- Date:
- 2014-01-30
- Revision:
- 80:66393a7b209d
- Parent:
- 76:aeb1df146756
- Child:
- 106:ced8cbb51063
File content as of revision 80:66393a7b209d:
/** ****************************************************************************** * @file stm32l1xx_gpio.c * @author MCD Application Team * @version V1.3.0 * @date 31-January-2014 * @brief This file provides firmware functions to manage the following * functionalities of the GPIO peripheral: * + Initialization and Configuration * + GPIO Read and Write * + GPIO Alternate functions configuration * * @verbatim =========================================================================== ##### How to use this driver ##### =========================================================================== [..] (#) Enable the GPIO AHB clock using RCC_AHBPeriphClockCmd() (#) Configure the GPIO pin(s) using GPIO_Init() Four possible configuration are available for each pin: (++) Input: Floating, Pull-up, Pull-down. (++) Output: Push-Pull (Pull-up, Pull-down or no Pull) Open Drain (Pull-up, Pull-down or no Pull). In output mode, the speed is configurable: Very Low, Low, Medium or High. (++) Alternate Function: Push-Pull (Pull-up, Pull-down or no Pull) Open Drain (Pull-up, Pull-down or no Pull). (++) Analog: required mode when a pin is to be used as ADC channel, DAC output or comparator input. (#) Peripherals alternate function: (++) For ADC, DAC and comparators, configure the desired pin in analog mode using GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AN (++) For other peripherals (TIM, USART...): (+++) Connect the pin to the desired peripherals' Alternate Function (AF) using GPIO_PinAFConfig() function. (+++) Configure the desired pin in alternate function mode using GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF (+++) Select the type, pull-up/pull-down and output speed via GPIO_PuPd, GPIO_OType and GPIO_Speed members. (+++) Call GPIO_Init() function. (#) To get the level of a pin configured in input mode use GPIO_ReadInputDataBit() (#) To set/reset the level of a pin configured in output mode use GPIO_SetBits()/GPIO_ResetBits() (#) During and just after reset, the alternate functions are not active and the GPIO pins are configured in input floating mode (except JTAG pins). (#) The LSE oscillator pins OSC32_IN and OSC32_OUT can be used as general-purpose (PC14 and PC15, respectively) when the LSE oscillator is off. The LSE has priority over the GPIO function. (#) The HSE oscillator pins OSC_IN/OSC_OUT can be used as general-purpose PH0 and PH1, respectively, when the HSE oscillator is off. The HSE has priority over the GPIO function. @endverbatim * ****************************************************************************** * @attention * * <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2> * * Licensed under MCD-ST Liberty SW License Agreement V2, (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.st.com/software_license_agreement_liberty_v2 * * 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. * ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "stm32l1xx_gpio.h" #include "stm32l1xx_rcc.h" /** @addtogroup STM32L1xx_StdPeriph_Driver * @{ */ /** @defgroup GPIO * @brief GPIO driver modules * @{ */ /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ /* Private functions ---------------------------------------------------------*/ /** @defgroup GPIO_Private_Functions * @{ */ /** @defgroup GPIO_Group1 Initialization and Configuration * @brief Initialization and Configuration * @verbatim =============================================================================== ##### Initialization and Configuration ##### =============================================================================== @endverbatim * @{ */ /** * @brief Deinitializes the GPIOx peripheral registers to their default reset * values. * By default, The GPIO pins are configured in input floating mode * (except JTAG pins). * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. * @retval None */ void GPIO_DeInit(GPIO_TypeDef* GPIOx) { /* Check the parameters */ assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); if(GPIOx == GPIOA) { RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOA, ENABLE); RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOA, DISABLE); } else if(GPIOx == GPIOB) { RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOB, ENABLE); RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOB, DISABLE); } else if(GPIOx == GPIOC) { RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOC, ENABLE); RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOC, DISABLE); } else if(GPIOx == GPIOD) { RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOD, ENABLE); RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOD, DISABLE); } else if(GPIOx == GPIOE) { RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOE, ENABLE); RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOE, DISABLE); } else if(GPIOx == GPIOF) { RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOF, ENABLE); RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOF, DISABLE); } else if(GPIOx == GPIOG) { RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOG, ENABLE); RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOG, DISABLE); } else { if(GPIOx == GPIOH) { RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOH, ENABLE); RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOH, DISABLE); } } } /** * @brief Initializes the GPIOx peripheral according to the specified * parameters in the GPIO_InitStruct. * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. * @param GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure that * contains the configuration information for the specified GPIO * peripheral. * @retval None */ void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct) { uint32_t pinpos = 0x00, pos = 0x00 , currentpin = 0x00; uint32_t tmpreg = 0x00; /* Check the parameters */ assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); assert_param(IS_GPIO_PIN(GPIO_InitStruct->GPIO_Pin)); assert_param(IS_GPIO_MODE(GPIO_InitStruct->GPIO_Mode)); assert_param(IS_GPIO_PUPD(GPIO_InitStruct->GPIO_PuPd)); /* -------------------------Configure the port pins---------------- */ /*-- GPIO Mode Configuration --*/ for (pinpos = 0x00; pinpos < 0x10; pinpos++) { pos = ((uint32_t)0x01) << pinpos; /* Get the port pins position */ currentpin = (GPIO_InitStruct->GPIO_Pin) & pos; if (currentpin == pos) { /* Use temporary variable to update MODER register configuration, to avoid unexpected transition in the GPIO pin configuration. */ tmpreg = GPIOx->MODER; tmpreg &= ~(GPIO_MODER_MODER0 << (pinpos * 2)); tmpreg |= (((uint32_t)GPIO_InitStruct->GPIO_Mode) << (pinpos * 2)); GPIOx->MODER = tmpreg; if ((GPIO_InitStruct->GPIO_Mode == GPIO_Mode_OUT) || (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_AF)) { /* Check Speed mode parameters */ assert_param(IS_GPIO_SPEED(GPIO_InitStruct->GPIO_Speed)); /* Use temporary variable to update OSPEEDR register configuration, to avoid unexpected transition in the GPIO pin configuration. */ tmpreg = GPIOx->OSPEEDR; tmpreg &= ~(GPIO_OSPEEDER_OSPEEDR0 << (pinpos * 2)); tmpreg |= ((uint32_t)(GPIO_InitStruct->GPIO_Speed) << (pinpos * 2)); GPIOx->OSPEEDR = tmpreg; /*Check Output mode parameters */ assert_param(IS_GPIO_OTYPE(GPIO_InitStruct->GPIO_OType)); /* Use temporary variable to update OTYPER register configuration, to avoid unexpected transition in the GPIO pin configuration. */ tmpreg = GPIOx->OTYPER; tmpreg &= ~((GPIO_OTYPER_OT_0) << ((uint16_t)pinpos)); tmpreg |= (uint16_t)(((uint16_t)GPIO_InitStruct->GPIO_OType) << ((uint16_t)pinpos)); GPIOx->OTYPER = tmpreg; } /* Use temporary variable to update PUPDR register configuration, to avoid unexpected transition in the GPIO pin configuration. */ tmpreg = GPIOx->PUPDR; tmpreg &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t)pinpos * 2)); tmpreg |= (((uint32_t)GPIO_InitStruct->GPIO_PuPd) << (pinpos * 2)); GPIOx->PUPDR = tmpreg; } } } /** * @brief Fills each GPIO_InitStruct member with its default value. * @param GPIO_InitStruct : pointer to a GPIO_InitTypeDef structure which will * be initialized. * @retval None */ void GPIO_StructInit(GPIO_InitTypeDef* GPIO_InitStruct) { /* Reset GPIO init structure parameters values */ GPIO_InitStruct->GPIO_Pin = GPIO_Pin_All; GPIO_InitStruct->GPIO_Mode = GPIO_Mode_IN; GPIO_InitStruct->GPIO_Speed = GPIO_Speed_400KHz; GPIO_InitStruct->GPIO_OType = GPIO_OType_PP; GPIO_InitStruct->GPIO_PuPd = GPIO_PuPd_NOPULL; } /** * @brief Locks GPIO Pins configuration registers. * The locked registers are GPIOx_MODER, GPIOx_OTYPER, GPIOx_OSPEEDR, * GPIOx_PUPDR, GPIOx_AFRL and GPIOx_AFRH. * The configuration of the locked GPIO pins can no longer be modified * until the next reset. * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. * @param GPIO_Pin: specifies the port bit to be written. * This parameter can be any combination of GPIO_Pin_x where x can be (0..15). * @retval None */ void GPIO_PinLockConfig(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) { __IO uint32_t tmp = 0x00010000; /* Check the parameters */ assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); assert_param(IS_GPIO_PIN(GPIO_Pin)); tmp |= GPIO_Pin; /* Set LCKK bit */ GPIOx->LCKR = tmp; /* Reset LCKK bit */ GPIOx->LCKR = GPIO_Pin; /* Set LCKK bit */ GPIOx->LCKR = tmp; /* Read LCKK bit*/ tmp = GPIOx->LCKR; /* Read LCKK bit*/ tmp = GPIOx->LCKR; } /** * @} */ /** @defgroup GPIO_Group2 GPIO Read and Write * @brief GPIO Read and Write * @verbatim =============================================================================== ##### GPIO Read and Write ##### =============================================================================== @endverbatim * @{ */ /** * @brief Reads the specified input port pin. * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. * @param GPIO_Pin: specifies the port bit to read. * This parameter can be GPIO_Pin_x where x can be (0..15). * @retval The input port pin value. */ uint8_t GPIO_ReadInputDataBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) { uint8_t bitstatus = 0x00; /* Check the parameters */ assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); assert_param(IS_GET_GPIO_PIN(GPIO_Pin)); if ((GPIOx->IDR & GPIO_Pin) != (uint32_t)Bit_RESET) { bitstatus = (uint8_t)Bit_SET; } else { bitstatus = (uint8_t)Bit_RESET; } return bitstatus; } /** * @brief Reads the specified GPIO input data port. * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. * @retval GPIO input data port value. */ uint16_t GPIO_ReadInputData(GPIO_TypeDef* GPIOx) { /* Check the parameters */ assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); return ((uint16_t)GPIOx->IDR); } /** * @brief Reads the specified output data port bit. * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. * @param GPIO_Pin: Specifies the port bit to read. * This parameter can be GPIO_Pin_x where x can be (0..15). * @retval The output port pin value. */ uint8_t GPIO_ReadOutputDataBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) { uint8_t bitstatus = 0x00; /* Check the parameters */ assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); assert_param(IS_GET_GPIO_PIN(GPIO_Pin)); if ((GPIOx->ODR & GPIO_Pin) != (uint32_t)Bit_RESET) { bitstatus = (uint8_t)Bit_SET; } else { bitstatus = (uint8_t)Bit_RESET; } return bitstatus; } /** * @brief Reads the specified GPIO output data port. * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. * @retval GPIO output data port value. */ uint16_t GPIO_ReadOutputData(GPIO_TypeDef* GPIOx) { /* Check the parameters */ assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); return ((uint16_t)GPIOx->ODR); } /** * @brief Sets the selected data port bits. * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. * @param GPIO_Pin: specifies the port bits to be written. * This parameter can be any combination of GPIO_Pin_x where x can be (0..15). * @note This functions uses GPIOx_BSRR register to allow atomic read/modify * accesses. In this way, there is no risk of an IRQ occurring between * the read and the modify access. * @retval None */ void GPIO_SetBits(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) { /* Check the parameters */ assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); assert_param(IS_GPIO_PIN(GPIO_Pin)); GPIOx->BSRRL = GPIO_Pin; } /** * @brief Clears the selected data port bits. * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. * @param GPIO_Pin: specifies the port bits to be written. * This parameter can be any combination of GPIO_Pin_x where x can be (0..15). * @note This functions uses GPIOx_BSRR register to allow atomic read/modify * accesses. In this way, there is no risk of an IRQ occurring between * the read and the modify access. * @retval None */ void GPIO_ResetBits(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) { /* Check the parameters */ assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); assert_param(IS_GPIO_PIN(GPIO_Pin)); GPIOx->BSRRH = GPIO_Pin; } /** * @brief Sets or clears the selected data port bit. * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. * @param GPIO_Pin: specifies the port bit to be written. * This parameter can be one of GPIO_Pin_x where x can be (0..15). * @param BitVal: specifies the value to be written to the selected bit. * This parameter can be one of the BitAction enum values: * @arg Bit_RESET: to clear the port pin * @arg Bit_SET: to set the port pin * @retval None */ void GPIO_WriteBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin, BitAction BitVal) { /* Check the parameters */ assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); assert_param(IS_GET_GPIO_PIN(GPIO_Pin)); assert_param(IS_GPIO_BIT_ACTION(BitVal)); if (BitVal != Bit_RESET) { GPIOx->BSRRL = GPIO_Pin; } else { GPIOx->BSRRH = GPIO_Pin ; } } /** * @brief Writes data to the specified GPIO data port. * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. * @param PortVal: specifies the value to be written to the port output data * register. * @retval None */ void GPIO_Write(GPIO_TypeDef* GPIOx, uint16_t PortVal) { /* Check the parameters */ assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); GPIOx->ODR = PortVal; } /** * @brief Toggles the specified GPIO pins.. * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. * @param GPIO_Pin: Specifies the pins to be toggled. * @retval None */ void GPIO_ToggleBits(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) { /* Check the parameters */ assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); GPIOx->ODR ^= GPIO_Pin; } /** * @} */ /** @defgroup GPIO_Group3 GPIO Alternate functions configuration functions * @brief GPIO Alternate functions configuration functions * @verbatim =============================================================================== ##### GPIO Alternate functions configuration functions ##### =============================================================================== @endverbatim * @{ */ /** * @brief Changes the mapping of the specified pin. * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. * @param GPIO_PinSource: specifies the pin for the Alternate function. * This parameter can be GPIO_PinSourcex where x can be (0..15). * @param GPIO_AFSelection: selects the pin to used as Alternat function. * This parameter can be one of the following values: * @arg GPIO_AF_RTC_50Hz: RTC 50/60 Hz synchronization * @arg GPIO_AF_MCO: Microcontroller clock output * @arg GPIO_AF_RTC_AF1: Time stamp, Tamper, Alarm A out, Alarm B out, * 512 Hz clock output (with an LSE oscillator of 32.768 kHz) * @arg GPIO_AF_WKUP: wakeup * @arg GPIO_AF_SWJ: SWJ (SW and JTAG) * @arg GPIO_AF_TRACE: Connect TRACE pins to AF0 (default after reset) * @arg GPIO_AF_TIM2c: Connect TIM2 pins to AF1 * @arg GPIO_AF_TIM3: Connect TIM3 pins to AF2 * @arg GPIO_AF_TIM4: Connect TIM4 pins to AF2 * @arg GPIO_AF_TIM5: Connect TIM5 pins to AF2 * @arg GPIO_AF_TIM9: Connect TIM9 pins to AF3 * @arg GPIO_AF_TIM10: Connect TIM10 pins to AF3 * @arg GPIO_AF_TIM11: Connect TIM11 pins to AF3 * @arg GPIO_AF_I2C1: Connect I2C1 pins to AF4 * @arg GPIO_AF_I2C2: Connect I2C2 pins to AF4 * @arg GPIO_AF_SPI1: Connect SPI1 pins to AF5 * @arg GPIO_AF_SPI2: Connect SPI2/I2S2 pins to AF5 * @arg GPIO_AF_SPI3: Connect SPI3/I2S3 pins to AF6 * @arg GPIO_AF_USART1: Connect USART1 pins to AF7 * @arg GPIO_AF_USART2: Connect USART2 pins to AF7 * @arg GPIO_AF_USART3: Connect USART3 pins to AF7 * @arg GPIO_AF_UART4: Connect UART4 pins to AF8 * @arg GPIO_AF_UART5: Connect UART5 pins to AF8 * @arg GPIO_AF_USB: Connect USB pins to AF10 * @arg GPIO_AF_LCD: Connect LCD pins to AF11 * @arg GPIO_AF_FSMC: Connect FSMC pins to AF12 * @arg GPIO_AF_SDIO: Connect SDIO pins to AF12 * @arg GPIO_AF_RI: Connect RI pins to AF14 * @arg GPIO_AF_EVENTOUT: Cortex-M3 EVENTOUT signal * @note The pin should already been configured in Alternate Function mode(AF) * using GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF * @note Please refer to the Alternate function mapping table in the device * datasheet for the detailed mapping of the system and peripherals' * alternate function I/O pins. * @note EVENTOUT is not mapped on PH0, PH1 and PH2. * @retval None */ void GPIO_PinAFConfig(GPIO_TypeDef* GPIOx, uint16_t GPIO_PinSource, uint8_t GPIO_AF) { uint32_t temp = 0x00; uint32_t temp_2 = 0x00; /* Check the parameters */ assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); assert_param(IS_GPIO_PIN_SOURCE(GPIO_PinSource)); assert_param(IS_GPIO_AF(GPIO_AF)); temp = ((uint32_t)(GPIO_AF) << ((uint32_t)((uint32_t)GPIO_PinSource & (uint32_t)0x07) * 4)) ; GPIOx->AFR[GPIO_PinSource >> 0x03] &= ~((uint32_t)0xF << ((uint32_t)((uint32_t)GPIO_PinSource & (uint32_t)0x07) * 4)) ; temp_2 = GPIOx->AFR[GPIO_PinSource >> 0x03] | temp; GPIOx->AFR[GPIO_PinSource >> 0x03] = temp_2; } /** * @} */ /** * @} */ /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/