/** ****************************************************************************** * @file stm32f0xx_syscfg.c * @author MCD Application Team * @version V1.4.0 * @date 24-July-2014 * @brief This file provides firmware functions to manage the following * functionalities of the SYSCFG peripheral: * + Remapping the memory mapped at 0x00000000 * + Remapping the DMA channels * + Enabling I2C fast mode plus driving capability for I2C pins * + Configuring the EXTI lines connection to the GPIO port * + Configuring the CFGR2 features (Connecting some internal signal * to the break input of TIM1) * * @verbatim =============================================================================== ##### How to use this driver ##### =============================================================================== [..] The SYSCFG registers can be accessed only when the SYSCFG interface APB clock is enabled. To enable SYSCFG APB clock use: RCC_APBPeriphClockCmd(RCC_APBPeriph_SYSCFG, ENABLE). * @endverbatim * ****************************************************************************** * @attention * *

© COPYRIGHT 2014 STMicroelectronics

* * 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 "stm32f0xx_syscfg.h" /** @addtogroup STM32F0xx_StdPeriph_Driver * @{ */ /** @defgroup SYSCFG * @brief SYSCFG driver modules * @{ */ /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ /* Private functions ---------------------------------------------------------*/ /** @defgroup SYSCFG_Private_Functions * @{ */ /** @defgroup SYSCFG_Group1 SYSCFG Initialization and Configuration functions * @brief SYSCFG Initialization and Configuration functions * @verbatim =============================================================================== ##### SYSCFG Initialization and Configuration functions ##### =============================================================================== @endverbatim * @{ */ /** * @brief Deinitializes the SYSCFG registers to their default reset values. * @param None * @retval None * @note MEM_MODE bits are not affected by APB reset. * @note MEM_MODE bits took the value from the user option bytes. * @note CFGR2 register is not affected by APB reset. * @note CLABBB configuration bits are locked when set. * @note To unlock the configuration, perform a system reset. */ void SYSCFG_DeInit(void) { /* Set SYSCFG_CFGR1 register to reset value without affecting MEM_MODE bits */ SYSCFG->CFGR1 &= SYSCFG_CFGR1_MEM_MODE; /* Set EXTICRx registers to reset value */ SYSCFG->EXTICR[0] = 0; SYSCFG->EXTICR[1] = 0; SYSCFG->EXTICR[2] = 0; SYSCFG->EXTICR[3] = 0; /* Set CFGR2 register to reset value: clear SRAM parity error flag */ SYSCFG->CFGR2 |= (uint32_t) SYSCFG_CFGR2_SRAM_PE; } /** * @brief Configures the memory mapping at address 0x00000000. * @param SYSCFG_MemoryRemap: selects the memory remapping. * This parameter can be one of the following values: * @arg SYSCFG_MemoryRemap_Flash: Main Flash memory mapped at 0x00000000 * @arg SYSCFG_MemoryRemap_SystemMemory: System Flash memory mapped at 0x00000000 * @arg SYSCFG_MemoryRemap_SRAM: Embedded SRAM mapped at 0x00000000 * @retval None */ void SYSCFG_MemoryRemapConfig(uint32_t SYSCFG_MemoryRemap) { uint32_t tmpctrl = 0; /* Check the parameter */ assert_param(IS_SYSCFG_MEMORY_REMAP(SYSCFG_MemoryRemap)); /* Get CFGR1 register value */ tmpctrl = SYSCFG->CFGR1; /* Clear MEM_MODE bits */ tmpctrl &= (uint32_t) (~SYSCFG_CFGR1_MEM_MODE); /* Set the new MEM_MODE bits value */ tmpctrl |= (uint32_t) SYSCFG_MemoryRemap; /* Set CFGR1 register with the new memory remap configuration */ SYSCFG->CFGR1 = tmpctrl; } /** * @brief Configure the DMA channels remapping. * @param SYSCFG_DMARemap: selects the DMA channels remap. * This parameter can be one of the following values: * @arg SYSCFG_DMARemap_TIM17: Remap TIM17 DMA requests from channel1 to channel2 * @arg SYSCFG_DMARemap_TIM16: Remap TIM16 DMA requests from channel3 to channel4 * @arg SYSCFG_DMARemap_USART1Rx: Remap USART1 Rx DMA requests from channel3 to channel5 * @arg SYSCFG_DMARemap_USART1Tx: Remap USART1 Tx DMA requests from channel2 to channel4 * @arg SYSCFG_DMARemap_ADC1: Remap ADC1 DMA requests from channel1 to channel2 * @param NewState: new state of the DMA channel remapping. * This parameter can be: ENABLE or DISABLE. * @note When enabled, DMA channel of the selected peripheral is remapped * @note When disabled, Default DMA channel is mapped to the selected peripheral * @note By default TIM17 DMA requests is mapped to channel 1, * use SYSCFG_DMAChannelRemapConfig(SYSCFG_DMARemap_TIM17, Enable) to remap * TIM17 DMA requests to channel 2 and use * SYSCFG_DMAChannelRemapConfig(SYSCFG_DMARemap_TIM17, Disable) to map * TIM17 DMA requests to channel 1 (default mapping) * @note This function is only used for STM32F030, STM32F031, STM32F042, STM32F072 and STM32F051 devices. * @retval None */ void SYSCFG_DMAChannelRemapConfig(uint32_t SYSCFG_DMARemap, FunctionalState NewState) { /* Check the parameters */ assert_param(IS_SYSCFG_DMA_REMAP(SYSCFG_DMARemap)); assert_param(IS_FUNCTIONAL_STATE(NewState)); if (NewState != DISABLE) { /* Remap the DMA channel */ SYSCFG->CFGR1 |= (uint32_t)SYSCFG_DMARemap; } else { /* use the default DMA channel mapping */ SYSCFG->CFGR1 &= (uint32_t)(~SYSCFG_DMARemap); } } /** * @brief Configure the I2C fast mode plus driving capability. * @param SYSCFG_I2CFastModePlus: selects the pin. * This parameter can be one of the following values: * @arg SYSCFG_I2CFastModePlus_PB6: Configure fast mode plus driving capability for PB6 * @arg SYSCFG_I2CFastModePlus_PB7: Configure fast mode plus driving capability for PB7 * @arg SYSCFG_I2CFastModePlus_PB8: Configure fast mode plus driving capability for PB8 * @arg SYSCFG_I2CFastModePlus_PB9: Configure fast mode plus driving capability for PB9 * @arg SYSCFG_I2CFastModePlus_PA9: Configure fast mode plus driving capability for PA9 (only for STM32F031 and STM32F030 devices) * @arg SYSCFG_I2CFastModePlus_PA10: Configure fast mode plus driving capability for PA10 (only for STM32F031 and STM32F030 devices) * @arg SYSCFG_I2CFastModePlus_I2C1: Configure fast mode plus driving capability for PB10, PB11, PF6 and PF7(only for STM32F031 and STM32F030 devices) * @arg SYSCFG_I2CFastModePlus_I2C2: Configure fast mode plus driving capability for I2C2 pins, available only for STM32F072 devices * * @param NewState: new state of the DMA channel remapping. * This parameter can be: ENABLE or DISABLE. * @note ENABLE: Enable fast mode plus driving capability for selected I2C pin * @note DISABLE: Disable fast mode plus driving capability for selected I2C pin * @note For I2C1, fast mode plus driving capability can be enabled on all selected * I2C1 pins using SYSCFG_I2CFastModePlus_I2C1 parameter or independently * on each one of the following pins PB6, PB7, PB8 and PB9. * @note For remaining I2C1 pins (PA14, PA15...) fast mode plus driving capability * can be enabled only by using SYSCFG_I2CFastModePlus_I2C1 parameter. * @note For all I2C2 pins fast mode plus driving capability can be enabled * only by using SYSCFG_I2CFastModePlus_I2C2 parameter. * @retval None */ void SYSCFG_I2CFastModePlusConfig(uint32_t SYSCFG_I2CFastModePlus, FunctionalState NewState) { /* Check the parameters */ assert_param(IS_SYSCFG_I2C_FMP(SYSCFG_I2CFastModePlus)); assert_param(IS_FUNCTIONAL_STATE(NewState)); if (NewState != DISABLE) { /* Enable fast mode plus driving capability for selected pin */ SYSCFG->CFGR1 |= (uint32_t)SYSCFG_I2CFastModePlus; } else { /* Disable fast mode plus driving capability for selected pin */ SYSCFG->CFGR1 &= (uint32_t)(~SYSCFG_I2CFastModePlus); } } /** @brief select the modulation envelope source * @param SYSCFG_IRDAEnv: select the envelope source. * This parameter can be a value * @arg SYSCFG_IRDA_ENV_SEL_TIM16 * @arg SYSCFG_IRDA_ENV_SEL_USART1 * @arg SYSCFG_IRDA_ENV_SEL_USART4 * @retval None */ void SYSCFG_IRDAEnvSelection(uint32_t SYSCFG_IRDAEnv) { /* Check the parameters */ assert_param(IS_SYSCFG_IRDA_ENV(SYSCFG_IRDAEnv)); SYSCFG->CFGR1 &= ~(SYSCFG_CFGR1_IRDA_ENV_SEL); SYSCFG->CFGR1 |= (SYSCFG_IRDAEnv); } /** * @brief Selects the GPIO pin used as EXTI Line. * @param EXTI_PortSourceGPIOx: selects the GPIO port to be used as source * for EXTI lines where x can be (A, B, C, D, E or F). * @note GPIOE is available only for STM32F072. * @note GPIOD is not available for STM32F031. * @param EXTI_PinSourcex: specifies the EXTI line to be configured. * @note This parameter can be EXTI_PinSourcex where x can be: * For STM32F051 and STM32F030: (0..15) for GPIOA, GPIOB, GPIOC, (2) for GPIOD and (0..1, 4..7) for GIIOF. * For STM32F072: (0..15) for GPIOA, GPIOB, GPIOC, GPIOD, GPIOE, (0..10) for GPIOF. * For STM32F031: (0..15) for GPIOA, GPIOB, (13..15) for GPIOC and (0..1, 6..7) for GPIOF. * @retval None */ void SYSCFG_EXTILineConfig(uint8_t EXTI_PortSourceGPIOx, uint8_t EXTI_PinSourcex) { uint32_t tmp = 0x00; /* Check the parameters */ assert_param(IS_EXTI_PORT_SOURCE(EXTI_PortSourceGPIOx)); assert_param(IS_EXTI_PIN_SOURCE(EXTI_PinSourcex)); tmp = ((uint32_t)0x0F) << (0x04 * (EXTI_PinSourcex & (uint8_t)0x03)); SYSCFG->EXTICR[EXTI_PinSourcex >> 0x02] &= ~tmp; SYSCFG->EXTICR[EXTI_PinSourcex >> 0x02] |= (((uint32_t)EXTI_PortSourceGPIOx) << (0x04 * (EXTI_PinSourcex & (uint8_t)0x03))); } /** * @brief check ISR wrapper: Allow to determine interrupt source per line . * @param IT_Source: specifies the interrupt source to check. * This parameter can be one of the following values: * @arg ITLINE_EWDG EWDG has expired * @arg ITLINE_PVDOUT Power voltage detection Interrupt * @arg ITLINE_VDDIO2 VDDIO2 Interrupt * @arg ITLINE_RTC_WAKEUP RTC WAKEUP -> exti[20] Interrupt * @arg ITLINE_RTC_TSTAMP RTC Time Stamp -> exti[19] interrupt * @arg ITLINE_RTC_ALRA RTC Alarm -> exti[17] interrupt * @arg ITLINE_FLASH_ITF Flash ITF Interrupt * @arg ITLINE_CRS CRS Interrupt * @arg ITLINE_CLK_CTRL CLK Control Interrupt * @arg ITLINE_EXTI0 External Interrupt 0 * @arg ITLINE_EXTI1 External Interrupt 1 * @arg ITLINE_EXTI2 External Interrupt 2 * @arg ITLINE_EXTI3 External Interrupt 3 * @arg ITLINE_EXTI4 External Interrupt 4 * @arg ITLINE_EXTI5 External Interrupt 5 * @arg ITLINE_EXTI6 External Interrupt 6 * @arg ITLINE_EXTI7 External Interrupt 7 * @arg ITLINE_EXTI8 External Interrupt 8 * @arg ITLINE_EXTI9 External Interrupt 9 * @arg ITLINE_EXTI10 External Interrupt 10 * @arg ITLINE_EXTI11 External Interrupt 11 * @arg ITLINE_EXTI12 External Interrupt 12 * @arg ITLINE_EXTI13 External Interrupt 13 * @arg ITLINE_EXTI14 External Interrupt 14 * @arg ITLINE_EXTI15 External Interrupt 15 * @arg ITLINE_TSC_EOA Touch control EOA Interrupt * @arg ITLINE_TSC_MCE Touch control MCE Interrupt * @arg ITLINE_DMA1_CH1 DMA1 Channel 1 Interrupt * @arg ITLINE_DMA1_CH2 DMA1 Channel 2 Interrupt * @arg ITLINE_DMA1_CH3 DMA1 Channel 3 Interrupt * @arg ITLINE_DMA2_CH1 DMA2 Channel 1 Interrupt * @arg ITLINE_DMA2_CH2 DMA2 Channel 2 Interrupt * @arg ITLINE_DMA1_CH4 DMA1 Channel 4 Interrupt * @arg ITLINE_DMA1_CH5 DMA1 Channel 5 Interrupt * @arg ITLINE_DMA1_CH6 DMA1 Channel 6 Interrupt * @arg ITLINE_DMA1_CH7 DMA1 Channel 7 Interrupt * @arg ITLINE_DMA2_CH3 DMA2 Channel 3 Interrupt * @arg ITLINE_DMA2_CH4 DMA2 Channel 4 Interrupt * @arg ITLINE_DMA2_CH5 DMA2 Channel 5 Interrupt * @arg ITLINE_ADC ADC Interrupt * @arg ITLINE_COMP1 COMP1 Interrupt -> exti[21] * @arg ITLINE_COMP2 COMP2 Interrupt -> exti[21] * @arg ITLINE_TIM1_BRK TIM1 BRK Interrupt * @arg ITLINE_TIM1_UPD TIM1 UPD Interrupt * @arg ITLINE_TIM1_TRG TIM1 TRG Interrupt * @arg ITLINE_TIM1_CCU TIM1 CCU Interrupt * @arg ITLINE_TIM1_CC TIM1 CC Interrupt * @arg ITLINE_TIM2 TIM2 Interrupt * @arg ITLINE_TIM3 TIM3 Interrupt * @arg ITLINE_DAC DAC Interrupt * @arg ITLINE_TIM6 TIM6 Interrupt * @arg ITLINE_TIM7 TIM7 Interrupt * @arg ITLINE_TIM14 TIM14 Interrupt * @arg ITLINE_TIM15 TIM15 Interrupt * @arg ITLINE_TIM16 TIM16 Interrupt * @arg ITLINE_TIM17 TIM17 Interrupt * @arg ITLINE_I2C1 I2C1 Interrupt -> exti[23] * @arg ITLINE_I2C2 I2C2 Interrupt * @arg ITLINE_SPI1 I2C1 Interrupt -> exti[23] * @arg ITLINE_SPI2 SPI1 Interrupt * @arg ITLINE_USART1 USART1 GLB Interrupt -> exti[25] * @arg ITLINE_USART2 USART2 GLB Interrupt -> exti[26] * @arg ITLINE_USART3 USART3 Interrupt * @arg ITLINE_USART4 USART4 Interrupt * @arg ITLINE_USART5 USART5 Interrupt * @arg ITLINE_USART6 USART6 Interrupt * @arg ITLINE_USART7 USART7 Interrupt * @arg ITLINE_USART8 USART8 Interrupt * @arg ITLINE_CAN CAN Interrupt * @arg ITLINE_CEC CEC Interrupt * @retval The new state of IT_LINE_SR. */ uint32_t SYSCFG_GetPendingIT(uint32_t ITSourceLine) { assert_param(IS_SYSCFG_ITLINE(ITSourceLine)); return(SYSCFG->IT_LINE_SR[(ITSourceLine >> 0x18)] & (ITSourceLine & 0x00FFFFFF)); } /** * @brief Connect the selected parameter to the break input of TIM1. * @note The selected configuration is locked and can be unlocked by system reset * @param SYSCFG_Break: selects the configuration to be connected to break * input of TIM1 * This parameter can be any combination of the following values: * @arg SYSCFG_Break_PVD: Connects the PVD event to the Break Input of TIM1,, not available for STM32F030 devices. * @arg SYSCFG_Break_SRAMParity: Connects the SRAM_PARITY error signal to the Break Input of TIM1 . * @arg SYSCFG_Break_Lockup: Connects Lockup output of CortexM0 to the break input of TIM1. * @retval None */ void SYSCFG_BreakConfig(uint32_t SYSCFG_Break) { /* Check the parameter */ assert_param(IS_SYSCFG_LOCK_CONFIG(SYSCFG_Break)); SYSCFG->CFGR2 |= (uint32_t) SYSCFG_Break; } /** * @brief Checks whether the specified SYSCFG flag is set or not. * @param SYSCFG_Flag: specifies the SYSCFG flag to check. * This parameter can be one of the following values: * @arg SYSCFG_FLAG_PE: SRAM parity error flag. * @retval The new state of SYSCFG_Flag (SET or RESET). */ FlagStatus SYSCFG_GetFlagStatus(uint32_t SYSCFG_Flag) { FlagStatus bitstatus = RESET; /* Check the parameter */ assert_param(IS_SYSCFG_FLAG(SYSCFG_Flag)); /* Check the status of the specified SPI flag */ if ((SYSCFG->CFGR2 & SYSCFG_CFGR2_SRAM_PE) != (uint32_t)RESET) { /* SYSCFG_Flag is set */ bitstatus = SET; } else { /* SYSCFG_Flag is reset */ bitstatus = RESET; } /* Return the SYSCFG_Flag status */ return bitstatus; } /** * @brief Clear the selected SYSCFG flag. * @param SYSCFG_Flag: selects the flag to be cleared. * This parameter can be any combination of the following values: * @arg SYSCFG_FLAG_PE: SRAM parity error flag. * @retval None */ void SYSCFG_ClearFlag(uint32_t SYSCFG_Flag) { /* Check the parameter */ assert_param(IS_SYSCFG_FLAG(SYSCFG_Flag)); SYSCFG->CFGR2 |= (uint32_t) SYSCFG_Flag; } /** * @} */ /** * @} */ /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/