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rt-thread/bsp/gd32103c-eval/Libraries/GD32F1xx_standard_peripheral/Source/gd32f10x_gpio.c

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/**
******************************************************************************
* @brief GPIO functions of the firmware library.
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "gd32f10x_gpio.h"
#include "gd32f10x_rcc.h"
/** @addtogroup GD32F10x_Firmware
* @{
*/
/** @defgroup GPIO
* @brief GPIO driver modules
* @{
*/
/** @defgroup GPIO_Private_Defines
* @{
*/
#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)
#define AFIO_PCFR1_MII_RMII ((uint32_t)0x00800000)
#define AFIO_ESSR1_BITS_FIELDS ((uint8_t)0x04)
#define AFIO_ESSR2_BITS_FIELDS ((uint8_t)0x08)
#define AFIO_ESSR3_BITS_FIELDS ((uint8_t)0x0c)
#define AFIO_ESSR_PIN_FIELDS ((uint8_t)0x04)
#define AFIO_ESSR_4BIT_FIELDS ((uint8_t)0x0f)
#define CTLR1_8BIT_FIELDS ((uint32_t)0x00ff)
#define CTLR2_8BIT_FIELDS ((uint32_t)0x00ff)
#define AFIO_PCFR2_FIELDS ((uint32_t)0x80000000)
/**
* @}
*/
/** @defgroup GPIO_Private_Functions
* @{
*/
/**
* @brief Reset the GPIOx peripheral.
* @param GPIOx: where x can be (A..G) to select the GPIO peripheral.
* @retval None
*/
void GPIO_DeInit(GPIO_TypeDef *GPIOx)
{
if (GPIOx == GPIOA) {
/* Enable GPIOA reset state */
RCC_APB2PeriphReset_Enable(RCC_APB2PERIPH_GPIOA, ENABLE);
/* Release GPIOA from reset state */
RCC_APB2PeriphReset_Enable(RCC_APB2PERIPH_GPIOA, DISABLE);
} else if (GPIOx == GPIOB) {
/* Enable GPIOB reset state */
RCC_APB2PeriphReset_Enable(RCC_APB2PERIPH_GPIOB, ENABLE);
/* Release GPIOB from reset state */
RCC_APB2PeriphReset_Enable(RCC_APB2PERIPH_GPIOB, DISABLE);
} else if (GPIOx == GPIOC) {
/* Enable GPIOC reset state */
RCC_APB2PeriphReset_Enable(RCC_APB2PERIPH_GPIOC, ENABLE);
/* Release GPIOC from reset state */
RCC_APB2PeriphReset_Enable(RCC_APB2PERIPH_GPIOC, DISABLE);
} else if (GPIOx == GPIOD) {
/* Enable GPIOD reset state */
RCC_APB2PeriphReset_Enable(RCC_APB2PERIPH_GPIOD, ENABLE);
/* Release GPIOD from reset state */
RCC_APB2PeriphReset_Enable(RCC_APB2PERIPH_GPIOD, DISABLE);
} else if (GPIOx == GPIOE) {
/* Enable GPIOE reset state */
RCC_APB2PeriphReset_Enable(RCC_APB2PERIPH_GPIOE, ENABLE);
/* Release GPIOE from reset state */
RCC_APB2PeriphReset_Enable(RCC_APB2PERIPH_GPIOE, DISABLE);
} else if (GPIOx == GPIOF) {
/* Enable GPIOF reset state */
RCC_APB2PeriphReset_Enable(RCC_APB2PERIPH_GPIOF, ENABLE);
/* Release GPIOF from reset state */
RCC_APB2PeriphReset_Enable(RCC_APB2PERIPH_GPIOF, DISABLE);
} else if (GPIOx == GPIOG) {
/* Enable GPIOG reset state */
RCC_APB2PeriphReset_Enable(RCC_APB2PERIPH_GPIOG, ENABLE);
/* Release GPIOG from reset state */
RCC_APB2PeriphReset_Enable(RCC_APB2PERIPH_GPIOG, DISABLE);
}
}
/**
* @brief Deinitialize the Alternate Functions (remap, event control
* and EXTI configuration) registers to their default reset values.
* @param None
* @retval None
*/
void GPIO_AFDeInit(void)
{
/* Enable AFIO reset state */
RCC_APB2PeriphReset_Enable(RCC_APB2PERIPH_AF, ENABLE);
/* Release AFIO from reset state */
RCC_APB2PeriphReset_Enable(RCC_APB2PERIPH_AF, DISABLE);
}
/**
* @brief Initialize the GPIOx peripheral.
* @param GPIOx: where x can be (A..G) to select the GPIO peripheral.
* @param GPIO_InitStruct: The structuer contains configuration information.
* @retval None
*/
void GPIO_Init(GPIO_TypeDef *GPIOx, GPIO_InitPara *GPIO_InitStruct)
{
uint32_t currentmode = 0x00, currentpin = 0x00, pinpos = 0x00, pos = 0x00;
uint32_t tempreg = 0x00, pinmask = 0x00;
/* GPIO Mode Configuration */
currentmode = ((uint32_t)GPIO_InitStruct->GPIO_Mode) & ((uint32_t)0x0F);
if ((((uint32_t)GPIO_InitStruct->GPIO_Mode) & ((uint32_t)0x10)) != 0x00) {
/* Output mode */
currentmode |= (uint32_t)GPIO_InitStruct->GPIO_Speed;
}
/* GPIO CTLR1 Configuration */
/* Configure the eight low port pins */
if (((uint32_t)GPIO_InitStruct->GPIO_Pin & CTLR1_8BIT_FIELDS) != 0x00) {
tempreg = GPIOx->CTLR1;
for (pinpos = 0x00; pinpos < 0x08; pinpos++) {
pos = ((uint32_t)0x01) << pinpos;
/* Get the port pins position */
currentpin = (GPIO_InitStruct->GPIO_Pin) & pos;
if (currentpin == pos) {
pos = pinpos << 2;
/* Clear the corresponding low control register bits */
pinmask = ((uint32_t)0x0F) << pos;
tempreg &= ~pinmask;
/* Write the mode configuration in the corresponding bits */
tempreg |= (currentmode << pos);
/* Reset the corresponding ODR bit */
if (GPIO_InitStruct->GPIO_Mode == GPIO_MODE_IPD) {
GPIOx->BCR = (((uint32_t)0x01) << pinpos);
} else {
/* Set the corresponding ODR bit */
if (GPIO_InitStruct->GPIO_Mode == GPIO_MODE_IPU) {
GPIOx->BOR = (((uint32_t)0x01) << pinpos);
}
}
}
}
GPIOx->CTLR1 = tempreg;
}
/* GPIO CTLR2 Configuration */
/* Configure the eight high port pins */
if (GPIO_InitStruct->GPIO_Pin > CTLR2_8BIT_FIELDS) {
tempreg = GPIOx->CTLR2;
for (pinpos = 0x00; pinpos < 0x08; pinpos++) {
pos = (((uint32_t)0x01) << (pinpos + 0x08));
/* Get the port pins position */
currentpin = ((GPIO_InitStruct->GPIO_Pin) & pos);
if (currentpin == pos) {
pos = pinpos << 2;
/* Clear the corresponding high control register bits */
pinmask = ((uint32_t)0x0F) << pos;
tempreg &= ~pinmask;
/* Write the mode configuration in the corresponding bits */
tempreg |= (currentmode << pos);
/* Reset the corresponding DOR bit */
if (GPIO_InitStruct->GPIO_Mode == GPIO_MODE_IPD) {
GPIOx->BCR = (((uint32_t)0x01) << (pinpos + 0x08));
}
/* Set the corresponding DOR bit */
if (GPIO_InitStruct->GPIO_Mode == GPIO_MODE_IPU) {
GPIOx->BOR = (((uint32_t)0x01) << (pinpos + 0x08));
}
}
}
GPIOx->CTLR2 = tempreg;
}
}
/**
* @brief Initial GPIO_InitParameter members.
* @param GPIO_InitParameter : pointer to a GPIO_InitPara structure.
* @retval None
*/
void GPIO_ParaInit(GPIO_InitPara *GPIO_InitStruct)
{
/* Reset GPIO init structure parameters values */
GPIO_InitStruct->GPIO_Pin = GPIO_PIN_ALL;
GPIO_InitStruct->GPIO_Speed = GPIO_SPEED_2MHZ;
GPIO_InitStruct->GPIO_Mode = GPIO_MODE_IN_FLOATING;
}
/**
* @brief Read the select input port.
* @param GPIOx: Select the GPIO peripheral.
* @param GPIO_Pin: Select the port.
* @retval The input port pin value.
*/
uint8_t GPIO_ReadInputBit(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
{
uint8_t bitstatus = 0x00;
if ((GPIOx->DIR & GPIO_Pin) != (uint32_t)Bit_RESET) {
bitstatus = (uint8_t)Bit_SET;
} else {
bitstatus = (uint8_t)Bit_RESET;
}
return bitstatus;
}
/**
* @brief Read the specified GPIO input data port.
* @param GPIOx: where x can be (A..G) to select the GPIO peripheral.
* @retval GPIO input data port value.
*/
uint16_t GPIO_ReadInputData(GPIO_TypeDef *GPIOx)
{
return ((uint16_t)GPIOx->DIR);
}
/**
* @brief Read the specified output data port bit.
* @param GPIOx: where x can be (A..G) to select the GPIO peripheral.
* @param GPIO_Pin: where pin can be (GPIO_PIN_0..GPIO_PIN_15) to select the GPIO peripheral.
* @retval The output port pin value.
*/
uint8_t GPIO_ReadOutputBit(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
{
uint8_t bitstatus = 0x00;
if ((GPIOx->DOR & GPIO_Pin) != (uint32_t)Bit_RESET) {
bitstatus = (uint8_t)Bit_SET;
} else {
bitstatus = (uint8_t)Bit_RESET;
}
return bitstatus;
}
/**
* @brief Read the specified GPIO output data port.
* @param GPIOx: where x can be (A..G) to select the GPIO peripheral.
* @retval GPIO output data port value.
*/
uint16_t GPIO_ReadOutputData(GPIO_TypeDef *GPIOx)
{
return ((uint16_t)GPIOx->DOR);
}
/**
* @brief Set the selected data port bits.
* @param GPIOx: where x can be (A..G) to select the GPIO peripheral.
* @param GPIO_Pin: where pin can be (GPIO_PIN_0..GPIO_PIN_15) to select the GPIO peripheral.
* @retval None
*/
void GPIO_SetBits(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
{
GPIOx->BOR = GPIO_Pin;
}
/**
* @brief Clear the selected data port bits.
* @param GPIOx: where x can be (A..G) to select the GPIO peripheral.
* @param GPIO_Pin: where pin can be (GPIO_PIN_0..GPIO_PIN_15) to select the GPIO peripheral.
* @retval None
*/
void GPIO_ResetBits(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
{
GPIOx->BCR = GPIO_Pin;
}
/**
* @brief Set or clear the selected data port bit.
* @param GPIOx: where x can be (A..G) to select the GPIO peripheral.
* @param GPIO_Pin: where pin can be (GPIO_PIN_0..GPIO_PIN_15) to select the GPIO peripheral.
* @param BitVal: specifies the state of the port.Select one of the follwing values :
* @arg Bit_RESET: clear the port pin
* @arg Bit_SET: set the port pin
* @retval None
*/
void GPIO_WriteBit(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin, BitState BitVal)
{
if (BitVal != Bit_RESET) {
GPIOx->BOR = GPIO_Pin;
} else {
GPIOx->BCR = GPIO_Pin;
}
}
/**
* @brief Write data to the specified GPIO data port.
* @param GPIOx: where x can be (A..G) to select the GPIO peripheral.
* @param PortVal: specifies the value to be written to the port data output register.
* @retval None
*/
void GPIO_WritePort(GPIO_TypeDef *GPIOx, uint16_t PortVal)
{
GPIOx->DOR = PortVal;
}
/**
* @brief Lock GPIO Pins configuration.
* @param GPIOx: where x can be (A..G) to select the GPIO peripheral.
* @param GPIO_Pin: where pin can be (GPIO_PIN_0..GPIO_PIN_15) to select the GPIO peripheral.
* @retval None
*/
void GPIO_PinLockConfig(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
{
uint32_t temp = 0x00010000;
temp |= GPIO_Pin;
/* Set LCKK bit */
GPIOx->LOCKR = temp;
/* Reset LCKK bit */
GPIOx->LOCKR = GPIO_Pin;
/* Set LCKK bit */
GPIOx->LOCKR = temp;
/* Read LCKK bit*/
temp = GPIOx->LOCKR;
/* Read LCKK bit*/
temp = GPIOx->LOCKR;
}
/**
* @brief Select the GPIO pin used as Event output.
* @param GPIO_PortSource: This parameter can be GPIO_PORT_SOURCE_GPIOx where x can be (A..G).
* @param GPIO_PinSource: This parameter can be GPIO_PINSOURCEx where x can be (0..15).
* @retval None
*/
void GPIO_EventOutputConfig(uint8_t GPIO_PortSource, uint8_t GPIO_PinSource)
{
uint32_t temp = 0x00;
temp = AFIO->AFIO_EVR;
/* Clear the PORT[6:4] and PIN[3:0] bits */
temp &= ECR_PORTPINCONFIG_MASK;
temp |= (uint32_t)GPIO_PortSource << 0x04;
temp |= GPIO_PinSource;
AFIO->AFIO_EVR = temp;
}
/**
* @brief Enable or disable the Event Output.
* @param AFIO_Event: AFIO_Event Enable or Disable bit.
* @param NewState: new state of the Event output.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void GPIO_EventOutput_Enable(uint32_t AFIO_Event, TypeState NewState)
{
/* Enable or disable the Event Output */
if (NewState != DISABLE) {
AFIO->AFIO_EVR |= AFIO_ECR_EVOE_SET;
} else {
AFIO->AFIO_EVR &= AFIO_ECR_EVOE_RESET;
}
}
/**
* @brief Change the mapping of the specified pin.
* @param GPIO_Remap: selects the pin to remap.
* This parameter can be one of the following values:
* @arg GPIO_REMAP_SPI1
* @arg GPIO_REMAP_I2C1
* @arg GPIO_REMAP_USART1
* @arg GPIO_REMAP_USART2
* @arg GPIO_PARTIAL_REMAP_USART3
* @arg GPIO_FULL_REMAP_USART3
* @arg GPIO_PARTIAL_REMAP_TIMER1
* @arg GPIO_FULL_REMAP_TIMER1
* @arg GPIO_PARTIAL_REMAP1_TIMER2
* @arg GPIO_PARTIAL_REMAP2_TIMER2
* @arg GPIO_FULL_REMAP_TIMER2
* @arg GPIO_PARTIAL_REMAP_TIMER3
* @arg GPIO_FULL_REMAP_TIMER3
* @arg GPIO_REMAP_TIMER4
* @arg GPIO_REMAP1_CAN1
* @arg GPIO_REMAP2_CAN1
* @arg GPIO_REMAP_PD01
* @arg GPIO_REMAP_TIMER5CH4_LSI
* @arg GPIO_REMAP_ADC1_ETRGINJ
* @arg GPIO_REMAP_ADC1_ETRGREG
* @arg GPIO_REMAP_ADC2_ETRGINJ
* @arg GPIO_REMAP_ADC2_ETRGREG
* @arg GPIO_REMAP_ETH
* @arg GPIO_REMAP_CAN2
* @arg GPIO_REMAP_SWJ_NOJTRST
* @arg GPIO_REMAP_SWJ_JTAGDISABLE
* @arg GPIO_REMAP_SWJ_DISABLE
* @arg GPIO_REMAP_SPI3
* @arg GPIO_REMAP_TIMER2ITR1_PTP_SOF
* @arg GPIO_REMAP_PTP_PPS
* @arg GPIO_REMAP_TIMER15
* @arg GPIO_REMAP_TIMER16
* @arg GPIO_REMAP_TIMER17
* @arg GPIO_REMAP_CEC
* @arg GPIO_REMAP_TIMER1_DMA
* @arg GPIO_REMAP_TIMER9
* @arg GPIO_REMAP_TIMER10
* @arg GPIO_REMAP_TIMER11
* @arg GPIO_REMAP_TIMER13
* @arg GPIO_REMAP_TIMER14
* @arg GPIO_REMAP_EXMC_NADV
* @arg GPIO_REMAP_TIMER67_DAC_DMA
* @arg GPIO_REMAP_TIMER12
* @arg GPIO_REMAP_MISC
* @param NewState: new state of the port pin remapping.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void GPIO_PinRemapConfig(uint32_t GPIO_Remap, TypeState NewState)
{
uint32_t temp = 0x00, temp1 = 0x00, tempreg = 0x00, tempmask = 0x00;
if ((GPIO_Remap & 0x80000000) == 0x80000000) {
tempreg = AFIO->AFIO_PCFR2;
} else {
tempreg = AFIO->AFIO_PCFR1;
}
tempmask = (GPIO_Remap & DBGAFR_POSITION_MASK) >> 0x10;
temp = GPIO_Remap & LSB_MASK;
if ((GPIO_Remap & (DBGAFR_LOCATION_MASK | DBGAFR_NUMBITS_MASK)) == (DBGAFR_LOCATION_MASK | DBGAFR_NUMBITS_MASK)) {
tempreg &= DBGAFR_SWJCFG_MASK;
AFIO->AFIO_PCFR1 &= DBGAFR_SWJCFG_MASK;
} else if ((GPIO_Remap & DBGAFR_NUMBITS_MASK) == DBGAFR_NUMBITS_MASK) {
temp1 = ((uint32_t)0x03) << tempmask;
tempreg &= ~temp1;
tempreg |= ~DBGAFR_SWJCFG_MASK;
} else {
tempreg &= ~(temp << ((GPIO_Remap >> 0x15) * 0x10));
tempreg |= ~DBGAFR_SWJCFG_MASK;
}
if (NewState != DISABLE) {
tempreg |= (temp << ((GPIO_Remap >> 0x15) * 0x10));
}
if ((GPIO_Remap & AFIO_PCFR2_FIELDS) == AFIO_PCFR2_FIELDS) {
AFIO->AFIO_PCFR2 = tempreg;
} else {
AFIO->AFIO_PCFR1 = tempreg;
}
}
/**
* @brief Select 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_PORT_SOURCE_GPIOx where x can be (A..G).
* @param GPIO_PinSource: specifies the EXTI line to be configured.
* This parameter can be GPIO_PINSOURCEx where x can be (0..15).
* @retval None
*/
void GPIO_EXTILineConfig(uint8_t GPIO_PortSource, uint8_t GPIO_PinSource)
{
uint32_t temp = 0x00;
temp = ((uint32_t)0x0f) << (AFIO_ESSR_PIN_FIELDS * (GPIO_PinSource & (uint8_t)0x03));
/* Select EXTI0->EXTI3 bit */
if (GPIO_PinSource < AFIO_ESSR1_BITS_FIELDS) {
AFIO->AFIO_ESSR1 &= ~temp;
AFIO->AFIO_ESSR1 |= (((uint32_t)GPIO_PortSource) << (AFIO_ESSR_PIN_FIELDS * (GPIO_PinSource & (uint8_t)0x03)));
}
/* Select EXTI4->EXTI7 bit */
else if (GPIO_PinSource < AFIO_ESSR2_BITS_FIELDS) {
AFIO->AFIO_ESSR2 &= ~temp;
AFIO->AFIO_ESSR2 |= (((uint32_t)GPIO_PortSource) << (AFIO_ESSR_PIN_FIELDS * (GPIO_PinSource & (uint8_t)0x03)));
}
/* Select EXTI8->EXTI11 bit */
else if (GPIO_PinSource < AFIO_ESSR3_BITS_FIELDS) {
AFIO->AFIO_ESSR3 &= ~temp;
AFIO->AFIO_ESSR3 |= (((uint32_t)GPIO_PortSource) << (AFIO_ESSR_PIN_FIELDS * (GPIO_PinSource & (uint8_t)0x03)));
}
/* Select EXTI12->EXTI15 bit */
else {
AFIO->AFIO_ESSR4 &= ~temp;
AFIO->AFIO_ESSR4 |= (((uint32_t)GPIO_PortSource) << (AFIO_ESSR_PIN_FIELDS * (GPIO_PinSource & (uint8_t)0x03)));
}
}
/**
* @brief Select the Ethernet media interface.
* @note This function applies only to GD32 Connectivity line devices.
* @param GPIO_ETH_MediaInterface: specifies the Media Interface mode.
* This parameter can be one of the following values:
* @arg GPIO_ETH_MEDIA_INTERFACE_MII: MII mode
* @arg GPIO_ETH_MEDIA_INTERFACE_RMII: RMII mode
* @retval None
*/
void GPIO_ETH_MediaInterfaceConfig(uint32_t GPIO_ETH_MediaInterface)
{
uint32_t temp = 0;
temp = AFIO->AFIO_PCFR1;
/* Clear MII_RMII_SEL bit */
temp &= ~((uint32_t)AFIO_PCFR1_MII_RMII);
/* Configure MII_RMII bit according to GPIO_ETH_MediaInterface value */
temp |= GPIO_ETH_MediaInterface;
/* Store the new value */
AFIO->AFIO_PCFR1 = temp;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
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