/********************************** (C) COPYRIGHT ******************************* * File Name : ch32v10x_gpio.c * Author : WCH * Version : V1.0.0 * Date : 2020/04/30 * Description : This file provides all the GPIO firmware functions. *******************************************************************************/ #include "ch32v10x_gpio.h" #include "ch32v10x_rcc.h" /* MASK */ #define ECR_PORTPINCONFIG_MASK ((uint16_t)0xFF80) #define LSB_MASK ((uint16_t)0xFFFF) #define DBGAFR_POSITION_MASK ((uint32_t)0x000F0000) #define DBGAFR_SWJCFG_MASK ((uint32_t)0xF0FFFFFF) #define DBGAFR_LOCATION_MASK ((uint32_t)0x00200000) #define DBGAFR_NUMBITS_MASK ((uint32_t)0x00100000) /******************************************************************************* * Function Name : GPIO_DeInit * Description : Deinitializes the GPIOx peripheral registers to their default reset values. * Input : GPIOx: where x can be (A..G) to select the GPIO peripheral. * Return : None *******************************************************************************/ void GPIO_DeInit(GPIO_TypeDef* GPIOx) { if (GPIOx == GPIOA) { RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOA, ENABLE); RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOA, DISABLE); } else if (GPIOx == GPIOB) { RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOB, ENABLE); RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOB, DISABLE); } else if (GPIOx == GPIOC) { RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOC, ENABLE); RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOC, DISABLE); } else if (GPIOx == GPIOD) { RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOD, ENABLE); RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOD, DISABLE); } else if (GPIOx == GPIOE) { RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOE, ENABLE); RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOE, DISABLE); } else if (GPIOx == GPIOF) { RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOF, ENABLE); RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOF, DISABLE); } else { if (GPIOx == GPIOG) { RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOG, ENABLE); RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOG, DISABLE); } } } /******************************************************************************* * Function Name : GPIO_AFIODeInit * Description : Deinitializes the Alternate Functions (remap, event control * and EXTI configuration) registers to their default reset values. * Input : None * Return : None *******************************************************************************/ void GPIO_AFIODeInit(void) { RCC_APB2PeriphResetCmd(RCC_APB2Periph_AFIO, ENABLE); RCC_APB2PeriphResetCmd(RCC_APB2Periph_AFIO, DISABLE); } /******************************************************************************* * Function Name : GPIO_Init * Description : GPIOx: where x can be (A..G) to select the GPIO peripheral. * Input : GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure that * contains the configuration information for the specified GPIO peripheral. * Return : None *******************************************************************************/ void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct) { uint32_t currentmode = 0x00, currentpin = 0x00, pinpos = 0x00, pos = 0x00; uint32_t tmpreg = 0x00, pinmask = 0x00; currentmode = ((uint32_t)GPIO_InitStruct->GPIO_Mode) & ((uint32_t)0x0F); if ((((uint32_t)GPIO_InitStruct->GPIO_Mode) & ((uint32_t)0x10)) != 0x00) { currentmode |= (uint32_t)GPIO_InitStruct->GPIO_Speed; } if (((uint32_t)GPIO_InitStruct->GPIO_Pin & ((uint32_t)0x00FF)) != 0x00) { tmpreg = GPIOx->CFGLR; for (pinpos = 0x00; pinpos < 0x08; pinpos++) { pos = ((uint32_t)0x01) << pinpos; currentpin = (GPIO_InitStruct->GPIO_Pin) & pos; if (currentpin == pos) { pos = pinpos << 2; pinmask = ((uint32_t)0x0F) << pos; tmpreg &= ~pinmask; tmpreg |= (currentmode << pos); if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPD) { GPIOx->BCR = (((uint32_t)0x01) << pinpos); } else { if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPU) { GPIOx->BSHR = (((uint32_t)0x01) << pinpos); } } } } GPIOx->CFGLR = tmpreg; } if (GPIO_InitStruct->GPIO_Pin > 0x00FF) { tmpreg = GPIOx->CFGHR; for (pinpos = 0x00; pinpos < 0x08; pinpos++) { pos = (((uint32_t)0x01) << (pinpos + 0x08)); currentpin = ((GPIO_InitStruct->GPIO_Pin) & pos); if (currentpin == pos) { pos = pinpos << 2; pinmask = ((uint32_t)0x0F) << pos; tmpreg &= ~pinmask; tmpreg |= (currentmode << pos); if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPD) { GPIOx->BCR = (((uint32_t)0x01) << (pinpos + 0x08)); } if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPU) { GPIOx->BSHR = (((uint32_t)0x01) << (pinpos + 0x08)); } } } GPIOx->CFGHR = tmpreg; } } /******************************************************************************* * Function Name : GPIO_StructInit * Description : Fills each GPIO_InitStruct member with its default * Input : GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure * which will be initialized. * Return : None *******************************************************************************/ void GPIO_StructInit(GPIO_InitTypeDef* GPIO_InitStruct) { GPIO_InitStruct->GPIO_Pin = GPIO_Pin_All; GPIO_InitStruct->GPIO_Speed = GPIO_Speed_2MHz; GPIO_InitStruct->GPIO_Mode = GPIO_Mode_IN_FLOATING; } /******************************************************************************* * Function Name : GPIO_ReadInputDataBit * Description : GPIOx: where x can be (A..G) to select the GPIO peripheral. * Input : GPIO_Pin: specifies the port bit to read. * This parameter can be GPIO_Pin_x where x can be (0..15). * Return : The input port pin value. *******************************************************************************/ uint8_t GPIO_ReadInputDataBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) { uint8_t bitstatus = 0x00; if ((GPIOx->INDR & GPIO_Pin) != (uint32_t)Bit_RESET) { bitstatus = (uint8_t)Bit_SET; } else { bitstatus = (uint8_t)Bit_RESET; } return bitstatus; } /******************************************************************************* * Function Name : GPIO_ReadInputData * Description : Reads the specified GPIO input data port. * Input : GPIOx: where x can be (A..G) to select the GPIO peripheral. * Return : The output port pin value. *******************************************************************************/ uint16_t GPIO_ReadInputData(GPIO_TypeDef* GPIOx) { return ((uint16_t)GPIOx->INDR); } /******************************************************************************* * Function Name : GPIO_ReadOutputDataBit * Description : Reads the specified output data port bit. * Input : GPIOx: where x can be (A..G) to select the GPIO peripheral. * GPIO_Pin: specifies the port bit to read. * This parameter can be GPIO_Pin_x where x can be (0..15). * Return : The output port pin value. *******************************************************************************/ uint8_t GPIO_ReadOutputDataBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) { uint8_t bitstatus = 0x00; if ((GPIOx->OUTDR & GPIO_Pin) != (uint32_t)Bit_RESET) { bitstatus = (uint8_t)Bit_SET; } else { bitstatus = (uint8_t)Bit_RESET; } return bitstatus; } /******************************************************************************* * Function Name : GPIO_ReadOutputData * Description : Reads the specified GPIO output data port. * Input : GPIOx: where x can be (A..G) to select the GPIO peripheral. * Return : GPIO output port pin value. *******************************************************************************/ uint16_t GPIO_ReadOutputData(GPIO_TypeDef* GPIOx) { return ((uint16_t)GPIOx->OUTDR); } /******************************************************************************* * Function Name : GPIO_SetBits * Description : Sets the selected data port bits. * Input : GPIOx: where x can be (A..G) to select the GPIO peripheral. * 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). * Return : None *******************************************************************************/ void GPIO_SetBits(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) { GPIOx->BSHR = GPIO_Pin; } /******************************************************************************* * Function Name : GPIO_ResetBits * Description : Clears the selected data port bits. * Input : GPIOx: where x can be (A..G) to select the GPIO peripheral. * 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). * Return : None *******************************************************************************/ void GPIO_ResetBits(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) { GPIOx->BCR = GPIO_Pin; } /******************************************************************************* * Function Name : GPIO_WriteBit * Description : Sets or clears the selected data port bit. * Input : GPIO_Pin: specifies the port bit to be written. * This parameter can be one of GPIO_Pin_x where x can be (0..15). * BitVal: specifies the value to be written to the selected bit. * Bit_SetL: to clear the port pin. * Bit_SetH: to set the port pin. * Return : None *******************************************************************************/ void GPIO_WriteBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin, BitAction BitVal) { if (BitVal != Bit_RESET) { GPIOx->BSHR = GPIO_Pin; } else { GPIOx->BCR = GPIO_Pin; } } /******************************************************************************* * Function Name : GPIO_Write * Description : Writes data to the specified GPIO data port. * Input : GPIOx: where x can be (A..G) to select the GPIO peripheral. * PortVal: specifies the value to be written to the port output data register. * Return : None *******************************************************************************/ void GPIO_Write(GPIO_TypeDef* GPIOx, uint16_t PortVal) { GPIOx->OUTDR = PortVal; } /******************************************************************************* * Function Name : GPIO_PinLockConfig * Description : Locks GPIO Pins configuration registers. * Input : GPIOx: where x can be (A..G) to select the GPIO peripheral. * 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). * Return : None *******************************************************************************/ void GPIO_PinLockConfig(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) { uint32_t tmp = 0x00010000; tmp |= GPIO_Pin; GPIOx->LCKR = tmp; GPIOx->LCKR = GPIO_Pin; GPIOx->LCKR = tmp; tmp = GPIOx->LCKR; tmp = GPIOx->LCKR; } /******************************************************************************* * Function Name : GPIO_EventOutputConfig * Description : Selects the GPIO pin used as Event output. * Input : GPIO_PortSource: selects the GPIO port to be used as source * for Event output. * This parameter can be GPIO_PortSourceGPIOx where x can be (A..E). * GPIO_PinSource: specifies the pin for the Event output. * This parameter can be GPIO_PinSourcex where x can be (0..15). * Return : None *******************************************************************************/ void GPIO_EventOutputConfig(uint8_t GPIO_PortSource, uint8_t GPIO_PinSource) { uint32_t tmpreg = 0x00; tmpreg = AFIO->ECR; tmpreg &= ECR_PORTPINCONFIG_MASK; tmpreg |= (uint32_t)GPIO_PortSource << 0x04; tmpreg |= GPIO_PinSource; AFIO->ECR = tmpreg; } /******************************************************************************* * Function Name : GPIO_EventOutputCmd * Description : Enables or disables the Event Output. * Input : NewState: ENABLE or DISABLE. * Return : None *******************************************************************************/ void GPIO_EventOutputCmd(FunctionalState NewState) { if(NewState) { AFIO->ECR |= (1<<7); } else { AFIO->ECR &= ~(1<<7); } } /******************************************************************************* * Function Name : GPIO_PinRemapConfig * Description : Changes the mapping of the specified pin. * Input : GPIO_Remap: selects the pin to remap. * GPIO_Remap_SPI1: SPI1 Alternate Function mapping * GPIO_Remap_I2C1: I2C1 Alternate Function mapping * GPIO_Remap_USART1: USART1 Alternate Function mapping * GPIO_Remap_USART2: USART2 Alternate Function mapping * GPIO_PartialRemap_USART3: USART3 Partial Alternate Function mapping * GPIO_FullRemap_USART3: USART3 Full Alternate Function mapping * GPIO_PartialRemap_TIM1: TIM1 Partial Alternate Function mapping * GPIO_FullRemap_TIM1: TIM1 Full Alternate Function mapping * GPIO_PartialRemap1_TIM2: TIM2 Partial1 Alternate Function mapping * GPIO_PartialRemap2_TIM2: TIM2 Partial2 Alternate Function mapping * GPIO_FullRemap_TIM2: TIM2 Full Alternate Function mapping * GPIO_PartialRemap_TIM3: TIM3 Partial Alternate Function mapping * GPIO_FullRemap_TIM3: TIM3 Full Alternate Function mapping * GPIO_Remap_TIM4: TIM4 Alternate Function mapping * GPIO_Remap1_CAN1: CAN1 Alternate Function mapping * GPIO_Remap2_CAN1: CAN1 Alternate Function mapping * GPIO_Remap_PD01: PD01 Alternate Function mapping * GPIO_Remap_ADC1_ETRGINJ: ADC1 External Trigger Injected Conversion remapping * GPIO_Remap_ADC1_ETRGREG: ADC1 External Trigger Regular Conversion remapping * GPIO_Remap_SWJ_NoJTRST: Full SWJ Enabled (JTAG-DP + SW-DP) but without JTRST * GPIO_Remap_SWJ_JTAGDisable: JTAG-DP Disabled and SW-DP Enabled * GPIO_Remap_SWJ_Disable: Full SWJ Disabled (JTAG-DP + SW-DP) * GPIO_Remap_TIM2ITR1_PTP_SOF: Ethernet PTP output or USB OTG SOF (Start of Frame) * connected to TIM2 Internal Trigger 1 for calibration (only for Connectivity line devices).If the * is enabled the TIM2 ITR1 is connected to Ethernet PTP output. When Reset TIM2 ITR1 is connected * to USB OTG SOF output. * GPIO_Remap_TIM1_DMA: TIM1 DMA requests mapping (only for Value line devices) * GPIO_Remap_TIM67_DAC_DMA: TIM6/TIM7 and DAC DMA requests remapping (only for High density Value line devices) * GPIO_Remap_MISC: Miscellaneous Remap (DMA2 Channel5 Position and DAC Trigger remapping, * only for High density Value line devices) * NewState: ENABLE or DISABLE. * Return : None *******************************************************************************/ void GPIO_PinRemapConfig(uint32_t GPIO_Remap, FunctionalState NewState) { uint32_t tmp = 0x00, tmp1 = 0x00, tmpreg = 0x00, tmpmask = 0x00; if((GPIO_Remap & 0x80000000) == 0x80000000) { tmpreg = AFIO->PCFR2; } else { tmpreg = AFIO->PCFR1; } tmpmask = (GPIO_Remap & DBGAFR_POSITION_MASK) >> 0x10; tmp = GPIO_Remap & LSB_MASK; if ((GPIO_Remap & (DBGAFR_LOCATION_MASK | DBGAFR_NUMBITS_MASK)) == (DBGAFR_LOCATION_MASK | DBGAFR_NUMBITS_MASK)) { tmpreg &= DBGAFR_SWJCFG_MASK; AFIO->PCFR1 &= DBGAFR_SWJCFG_MASK; } else if ((GPIO_Remap & DBGAFR_NUMBITS_MASK) == DBGAFR_NUMBITS_MASK) { tmp1 = ((uint32_t)0x03) << tmpmask; tmpreg &= ~tmp1; tmpreg |= ~DBGAFR_SWJCFG_MASK; } else { tmpreg &= ~(tmp << ((GPIO_Remap >> 0x15)*0x10)); tmpreg |= ~DBGAFR_SWJCFG_MASK; } if (NewState != DISABLE) { tmpreg |= (tmp << ((GPIO_Remap >> 0x15)*0x10)); } if((GPIO_Remap & 0x80000000) == 0x80000000) { AFIO->PCFR2 = tmpreg; } else { AFIO->PCFR1 = tmpreg; } } /******************************************************************************* * Function Name : GPIO_EXTILineConfig * Description : Selects the GPIO pin used as EXTI Line. * Input : GPIO_PortSource: selects the GPIO port to be used as source for EXTI lines. * This parameter can be GPIO_PortSourceGPIOx where x can be (A..G). * GPIO_PinSource: specifies the EXTI line to be configured. * This parameter can be GPIO_PinSourcex where x can be (0..15). * Return : None *******************************************************************************/ void GPIO_EXTILineConfig(uint8_t GPIO_PortSource, uint8_t GPIO_PinSource) { uint32_t tmp = 0x00; tmp = ((uint32_t)0x0F) << (0x04 * (GPIO_PinSource & (uint8_t)0x03)); AFIO->EXTICR[GPIO_PinSource >> 0x02] &= ~tmp; AFIO->EXTICR[GPIO_PinSource >> 0x02] |= (((uint32_t)GPIO_PortSource) << (0x04 * (GPIO_PinSource & (uint8_t)0x03))); }