/********************************** (C) COPYRIGHT ******************************* * File Name : ch32v30x_gpio.c * Author : WCH * Version : V1.0.0 * Date : 2021/06/06 * Description : This file provides all the GPIO firmware functions. * Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd. * SPDX-License-Identifier: Apache-2.0 *******************************************************************************/ #include "ch32v30x_gpio.h" #include "ch32v30x_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) /********************************************************************* * @fn GPIO_DeInit * * @brief Deinitializes the GPIOx peripheral registers to their default * reset values. * * @param 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); } } /********************************************************************* * @fn GPIO_AFIODeInit * * @brief Deinitializes the Alternate Functions (remap, event control * and EXTI configuration) registers to their default reset values. * * @return none */ void GPIO_AFIODeInit(void) { RCC_APB2PeriphResetCmd(RCC_APB2Periph_AFIO, ENABLE); RCC_APB2PeriphResetCmd(RCC_APB2Periph_AFIO, DISABLE); } /********************************************************************* * @fn GPIO_Init * * @brief GPIOx - where x can be (A..G) to select the GPIO peripheral. * * @param 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; } } /********************************************************************* * @fn GPIO_StructInit * * @brief Fills each GPIO_InitStruct member with its default * * @param 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; } /********************************************************************* * @fn GPIO_ReadInputDataBit * * @brief GPIOx - where x can be (A..G) 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). * * @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; } /********************************************************************* * @fn GPIO_ReadInputData * * @brief Reads the specified GPIO input data port. * * @param 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); } /********************************************************************* * @fn GPIO_ReadOutputDataBit * * @brief Reads the specified output data port bit. * * @param 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 none */ 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; } /********************************************************************* * @fn GPIO_ReadOutputData * * @brief Reads the specified GPIO output data port. * * @param 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); } /********************************************************************* * @fn GPIO_SetBits * * @brief Sets the selected data port bits. * * @param 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; } /********************************************************************* * @fn GPIO_ResetBits * * @brief Clears the selected data port bits. * * @param 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; } /********************************************************************* * @fn GPIO_WriteBit * * @brief Sets or clears the selected data port bit. * * @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). * 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; } } /********************************************************************* * @fn GPIO_Write * * @brief Writes data to the specified GPIO data port. * * @param 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; } /********************************************************************* * @fn GPIO_PinLockConfig * * @brief Locks GPIO Pins configuration registers. * * @param 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; } /********************************************************************* * @fn GPIO_EventOutputConfig * * @brief Selects the GPIO pin used as Event output. * * @param 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; } /********************************************************************* * @fn GPIO_EventOutputCmd * * @brief Enables or disables the Event Output. * * @param NewState - ENABLE or DISABLE. * * @return none */ void GPIO_EventOutputCmd(FunctionalState NewState) { if(NewState) { AFIO->ECR |= (1 << 7); } else { AFIO->ECR &= ~(1 << 7); } } /********************************************************************* * @fn GPIO_PinRemapConfig * * @brief Changes the mapping of the specified pin. * * @param 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_ADC2_ETRGINJ - ADC2 External Trigger Injected Conversion remapping * GPIO_Remap_ADC2_ETRGREG - ADC2 External Trigger Regular Conversion remapping * GPIO_Remap_ETH - Ethernet remapping * GPIO_Remap_CAN2 - CAN2 remapping * GPIO_Remap_MII_RMII_SEL - MII or RMII selection * 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 * GPIO_Remap_TIM2ITR1_PTP_SOF - Ethernet PTP output or USB OTG SOF (Start of Frame) * GPIO_Remap_TIM8 - TIM8 Alternate Function mapping * GPIO_PartialRemap_TIM9 - TIM9 Partial Alternate Function mapping * GPIO_FullRemap_TIM9 - TIM9 Full Alternate Function mapping * GPIO_PartialRemap_TIM10 - TIM10 Partial Alternate Function mapping * GPIO_FullRemap_TIM10 - TIM10 Full Alternate Function mapping * GPIO_Remap_FSMC_NADV - FSMC_NADV Alternate Function mapping * GPIO_PartialRemap_USART4 - USART4 Partial Alternate Function mapping * GPIO_FullRemap_USART4 - USART4 Full Alternate Function mapping * GPIO_PartialRemap_USART5 - USART5 Partial Alternate Function mapping * GPIO_FullRemap_USART5 - USART5 Full Alternate Function mapping * GPIO_PartialRemap_USART6 - USART6 Partial Alternate Function mapping * GPIO_FullRemap_USART6 - USART6 Full Alternate Function mapping * GPIO_PartialRemap_USART7 - USART7 Partial Alternate Function mapping * GPIO_FullRemap_USART7 - USART7 Full Alternate Function mapping * GPIO_PartialRemap_USART8 - USART8 Partial Alternate Function mapping * GPIO_FullRemap_USART8 - USART8 Full Alternate Function mapping * GPIO_Remap_USART1_HighBit - USART1 Alternate Function mapping high bit * 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; /* Clear bit */ if((GPIO_Remap & 0x80000000) == 0x80000000) { /* PCFR2 */ if((GPIO_Remap & (DBGAFR_LOCATION_MASK | DBGAFR_NUMBITS_MASK)) == (DBGAFR_LOCATION_MASK | DBGAFR_NUMBITS_MASK)) /* [31:16] 2bit */ { tmp1 = ((uint32_t)0x03) << (tmpmask + 0x10); tmpreg &= ~tmp1; } else if((GPIO_Remap & DBGAFR_NUMBITS_MASK) == DBGAFR_NUMBITS_MASK) /* [15:0] 2bit */ { tmp1 = ((uint32_t)0x03) << tmpmask; tmpreg &= ~tmp1; } else /* [31:0] 1bit */ { tmpreg &= ~(tmp << ((GPIO_Remap >> 0x15) * 0x10)); } } else { /* PCFR1 */ if((GPIO_Remap & (DBGAFR_LOCATION_MASK | DBGAFR_NUMBITS_MASK)) == (DBGAFR_LOCATION_MASK | DBGAFR_NUMBITS_MASK)) /* [26:24] 3bit SWD_JTAG */ { tmpreg &= DBGAFR_SWJCFG_MASK; AFIO->PCFR1 &= DBGAFR_SWJCFG_MASK; } else if((GPIO_Remap & DBGAFR_NUMBITS_MASK) == DBGAFR_NUMBITS_MASK) /* [15:0] 2bit */ { tmp1 = ((uint32_t)0x03) << tmpmask; tmpreg &= ~tmp1; tmpreg |= ~DBGAFR_SWJCFG_MASK; } else /* [31:0] 1bit */ { tmpreg &= ~(tmp << ((GPIO_Remap >> 0x15) * 0x10)); tmpreg |= ~DBGAFR_SWJCFG_MASK; } } /* Set bit */ if(NewState != DISABLE) { tmpreg |= (tmp << ((GPIO_Remap >> 0x15) * 0x10)); } if((GPIO_Remap & 0x80000000) == 0x80000000) { AFIO->PCFR2 = tmpreg; } else { AFIO->PCFR1 = tmpreg; } } /********************************************************************* * @fn GPIO_EXTILineConfig * * @brief Selects the GPIO pin used as EXTI Line. * * @param 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))); } /********************************************************************* * @fn GPIO_ETH_MediaInterfaceConfig * * @brief Selects the Ethernet media interface. * * @param GPIO_ETH_MediaInterface - specifies the Media Interface mode. * GPIO_ETH_MediaInterface_MII - MII mode * GPIO_ETH_MediaInterface_RMII - RMII mode * * @return none */ void GPIO_ETH_MediaInterfaceConfig(uint32_t GPIO_ETH_MediaInterface) { if(GPIO_ETH_MediaInterface) { AFIO->PCFR1 |= (1 << 23); } else { AFIO->PCFR1 &= ~(1 << 23); } }