rt-thread-official/bsp/gd32450z-eval/Libraries/GD32F4xx_standard_peripheral/Source/gd32f4xx_gpio.c

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2017-08-22 15:52:57 +08:00
/*!
\file gd32f4xx_gpio.c
\brief GPIO driver
*/
/*
Copyright (C) 2016 GigaDevice
2016-08-15, V1.0.0, firmware for GD32F4xx
*/
#include "gd32f4xx_gpio.h"
/*!
\brief reset GPIO port
\param[in] gpio_periph: GPIOx(x = A,B,C,D,E,F,G,H,I)
\param[out] none
\retval none
*/
void gpio_deinit(uint32_t gpio_periph)
{
switch(gpio_periph){
case GPIOA:
/* reset GPIOA */
rcu_periph_reset_enable(RCU_GPIOARST);
rcu_periph_reset_disable(RCU_GPIOARST);
break;
case GPIOB:
/* reset GPIOB */
rcu_periph_reset_enable(RCU_GPIOBRST);
rcu_periph_reset_disable(RCU_GPIOBRST);
break;
case GPIOC:
/* reset GPIOC */
rcu_periph_reset_enable(RCU_GPIOCRST);
rcu_periph_reset_disable(RCU_GPIOCRST);
break;
case GPIOD:
/* reset GPIOD */
rcu_periph_reset_enable(RCU_GPIODRST);
rcu_periph_reset_disable(RCU_GPIODRST);
break;
case GPIOE:
/* reset GPIOE */
rcu_periph_reset_enable(RCU_GPIOERST);
rcu_periph_reset_disable(RCU_GPIOERST);
break;
case GPIOF:
/* reset GPIOF */
rcu_periph_reset_enable(RCU_GPIOFRST);
rcu_periph_reset_disable(RCU_GPIOFRST);
break;
case GPIOG:
/* reset GPIOG */
rcu_periph_reset_enable(RCU_GPIOGRST);
rcu_periph_reset_disable(RCU_GPIOGRST);
break;
case GPIOH:
/* reset GPIOH */
rcu_periph_reset_enable(RCU_GPIOHRST);
rcu_periph_reset_disable(RCU_GPIOHRST);
break;
case GPIOI:
/* reset GPIOI */
rcu_periph_reset_enable(RCU_GPIOIRST);
rcu_periph_reset_disable(RCU_GPIOIRST);
break;
default:
break;
}
}
/*!
\brief set GPIO output mode
\param[in] gpio_periph: GPIOx(x = A,B,C,D,E,F,G,H,I)
\param[in] mode: gpio pin mode
\arg GPIO_MODE_INPUT: input mode
\arg GPIO_MODE_OUTPUT: output mode
\arg GPIO_MODE_AF: alternate function mode
\arg GPIO_MODE_ANALOG: analog mode
\param[in] pull_up_down: gpio pin with pull-up or pull-down resistor
\arg GPIO_PUPD_NONE: without weak pull-up and pull-down resistors
\arg GPIO_PUPD_PULLUP: with weak pull-up resistor
\arg GPIO_PUPD_PULLDOWN:with weak pull-down resistor
\param[in] pin: GPIO_PIN_x(x=0..15), GPIO_PIN_ALL
\param[out] none
\retval none
*/
void gpio_mode_set(uint32_t gpio_periph,uint32_t mode,uint32_t pull_up_down,uint32_t pin)
{
uint16_t i;
uint32_t ctl, pupd;
ctl = GPIO_CTL(gpio_periph);
pupd = GPIO_PUD(gpio_periph);
for(i = 0U;i < 16U;i++){
if((1U << i) & pin){
/* clear the specified pin mode bits */
ctl &= ~GPIO_MODE_MASK(i);
/* set the specified pin mode bits */
ctl |= GPIO_MODE_SET(i, mode);
/* clear the specified pin pupd bits */
pupd &= ~GPIO_PUPD_MASK(i);
/* set the specified pin pupd bits */
pupd |= GPIO_PUPD_SET(i, pull_up_down);
}
}
GPIO_CTL(gpio_periph) = ctl;
GPIO_PUD(gpio_periph) = pupd;
}
/*!
\brief set GPIO output type and speed
\param[in] gpio_periph: GPIOx(x = A,B,C,D,E,F,G,H,I)
\param[in] otype: gpio pin output mode
\arg GPIO_OTYPE_PP: push pull mode
\arg GPIO_OTYPE_OD: open drain mode
\param[in] speed: gpio pin output max speed
\arg GPIO_OSPEED_2MHZ: output max speed 2M
\arg GPIO_OSPEED_25MHZ: output max speed 25M
\arg GPIO_OSPEED_50MHZ: output max speed 50M
\arg GPIO_OSPEED_200MHZ: output max speed 200M
\param[in] pin: GPIO_PIN_x(x=0..15), GPIO_PIN_ALL
\param[out] none
\retval none
*/
void gpio_output_options_set(uint32_t gpio_periph,uint8_t otype,uint32_t speed,uint32_t pin)
{
uint16_t i;
uint32_t ospeedr;
if(0x1U == otype){
GPIO_OMODE(gpio_periph) |= (uint32_t)pin;
}else{
GPIO_OMODE(gpio_periph) &= (uint32_t)(~pin);
}
/* get the specified pin output speed bits value */
ospeedr = GPIO_OSPD(gpio_periph);
for(i = 0U;i < 16U;i++){
if((1U << i) & pin){
/* clear the specified pin output speed bits */
ospeedr &= ~GPIO_OSPEED_MASK(i);
/* set the specified pin output speed bits */
ospeedr |= GPIO_OSPEED_SET(i,speed);
}
}
GPIO_OSPD(gpio_periph) = ospeedr;
}
/*!
\brief set GPIO pin
\param[in] gpio_periph: GPIOx(x = A,B,C,D,E,F,G,H,I)
\param[in] pin: GPIO_PIN_x(x=0..15), GPIO_PIN_ALL
\param[out] none
\retval none
*/
void gpio_bit_set(uint32_t gpio_periph,uint32_t pin)
{
GPIO_BOP(gpio_periph) = (uint32_t)pin;
}
/*!
\brief reset GPIO pin
\param[in] gpio_periph: GPIOx(x = A,B,C,D,E,F,G,H,I)
\param[in] pin: GPIO_PIN_x(x=0..15), GPIO_PIN_ALL
\param[out] none
\retval none
*/
void gpio_bit_reset(uint32_t gpio_periph,uint32_t pin)
{
GPIO_BC(gpio_periph) = (uint32_t)pin;
}
/*!
\brief write data to the specified GPIO pin
\param[in] gpio_periph: GPIOx(x = A,B,C,D,E,F,G,H,I)
\param[in] pin: GPIO_PIN_x(x=0..15), GPIO_PIN_ALL
\param[in] bitvalue: SET or RESET
\arg RESET: clear the port pin
\arg SET: set the port pin
\param[out] none
\retval none
*/
void gpio_bit_write(uint32_t gpio_periph,uint32_t pin,bit_status bit_value)
{
if(RESET != bit_value){
GPIO_BOP(gpio_periph) = (uint32_t)pin;
}else{
GPIO_BC(gpio_periph) = (uint32_t)pin;
}
}
/*!
\brief write data to the specified GPIO port
\param[in] gpio_periph: GPIOx(x = A,B,C,D,E,F,G,H,I)
\param[in] data: specify the value to be written to the port output data register
\param[out] none
\retval none
*/
void gpio_port_write(uint32_t gpio_periph,uint16_t data)
{
GPIO_OCTL(gpio_periph) = (uint32_t)data;
}
/*!
\brief get GPIO pin input status
\param[in] gpio_periph: GPIOx(x = A,B,C,D,E,F,G,H,I)
\param[in] pin: GPIO_PIN_x(x=0..15), GPIO_PIN_ALL
\param[out] none
\retval input state of gpio pin: SET or RESET
*/
FlagStatus gpio_input_bit_get(uint32_t gpio_periph,uint32_t pin)
{
if((uint32_t)RESET != (GPIO_ISTAT(gpio_periph)&(pin))){
return SET;
}else{
return RESET;
}
}
/*!
\brief get GPIO all pins input status
\param[in] gpio_periph: GPIOx(x = A,B,C,D,E,F,G,H,I)
\param[out] none
\retval input state of gpio all pins
*/
uint16_t gpio_input_port_get(uint32_t gpio_periph)
{
return (uint16_t)(GPIO_ISTAT(gpio_periph));
}
/*!
\brief get GPIO pin output status
\param[in] gpio_periph: GPIOx(x = A,B,C,D,E,F,G,H,I)
\param[in] pin: GPIO_PIN_x(x=0..15), GPIO_PIN_ALL
\param[out] none
\retval output state of gpio pin: SET or RESET
*/
FlagStatus gpio_output_bit_get(uint32_t gpio_periph,uint32_t pin)
{
if((uint32_t)RESET !=(GPIO_OCTL(gpio_periph)&(pin))){
return SET;
}else{
return RESET;
}
}
/*!
\brief get GPIO all pins output status
\param[in] gpio_periph: GPIOx(x = A,B,C,D,E,F,G,H,I)
\param[out] none
\retval output state of gpio all pins
*/
uint16_t gpio_output_port_get(uint32_t gpio_periph)
{
return ((uint16_t)GPIO_OCTL(gpio_periph));
}
/*!
\brief set GPIO alternate function
\param[in] gpio_periph: GPIOx(x = A,B,C,D,E,F,G,H,I)
\param[in] alt_func_num: gpio pin af function
\arg GPIO_AF_0: SYSTEM
\arg GPIO_AF_1: TIMER0, TIMER1
\arg GPIO_AF_2: TIMER2, TIMER3, TIMER4
\arg GPIO_AF_3: TIMER7, TIMER8, TIMER9, TIMER10
\arg GPIO_AF_4: I2C0, I2C1, I2C2
\arg GPIO_AF_5: SPI0, SPI1, SPI2, SPI3, SPI4, SPI5
\arg GPIO_AF_6: SPI1, SPI2, SAI0
\arg GPIO_AF_7: USART0, USART1, USART2
\arg GPIO_AF_8: UART3, UART4, USART5, UART6, UART7
\arg GPIO_AF_9: CAN0,CAN1, TLI, TIMER11, TIMER12, TIMER13
\arg GPIO_AF_10: USB_FS, USB_HS
\arg GPIO_AF_11: ENET
\arg GPIO_AF_12: FMC, SDIO, USB_HS
\arg GPIO_AF_13: DCI
\arg GPIO_AF_14: TLI
\arg GPIO_AF_15: EVENTOUT
\param[in] pin: GPIO_PIN_x(x=0..15), GPIO_PIN_ALL
\param[out] none
\retval none
*/
void gpio_af_set(uint32_t gpio_periph,uint32_t alt_func_num,uint32_t pin)
{
uint16_t i;
uint32_t afrl, afrh;
afrl = GPIO_AFSEL0(gpio_periph);
afrh = GPIO_AFSEL1(gpio_periph);
for(i = 0U;i < 8U;i++){
if((1U << i) & pin){
/* clear the specified pin alternate function bits */
afrl &= ~GPIO_AFR_MASK(i);
afrl |= GPIO_AFR_SET(i,alt_func_num);
}
}
for(i = 8U;i < 16U;i++){
if((1U << i) & pin){
/* clear the specified pin alternate function bits */
afrh &= ~GPIO_AFR_MASK(i - 8U);
afrh |= GPIO_AFR_SET(i - 8U,alt_func_num);
}
}
GPIO_AFSEL0(gpio_periph) = afrl;
GPIO_AFSEL1(gpio_periph) = afrh;
}
/*!
\brief lock GPIO pin
\param[in] gpio_periph: GPIOx(x = A,B,C,D,E,F,G,H,I)
\param[in] pin: GPIO_PIN_x(x=0..15), GPIO_PIN_ALL
\param[out] none
\retval none
*/
void gpio_pin_lock(uint32_t gpio_periph,uint32_t pin)
{
uint32_t lock = 0x00010000U;
lock |= pin;
/* lock key writing sequence: write 1->write 0->write 1-> read 0-> read 1 */
GPIO_LOCK(gpio_periph) = (uint32_t)lock;
GPIO_LOCK(gpio_periph) = (uint32_t)pin;
GPIO_LOCK(gpio_periph) = (uint32_t)lock;
lock = GPIO_LOCK(gpio_periph);
lock = GPIO_LOCK(gpio_periph);
}
/*!
\brief toggle GPIO pin
\param[in] gpio_periph: GPIOx(x = A,B,C,D,E,F,G,H,I)
\param[in] pin: GPIO_PIN_x(x=0..15), GPIO_PIN_ALL
\param[out] none
\retval none
*/
void gpio_bit_toggle(uint32_t gpio_periph,uint32_t pin)
{
GPIO_TG(gpio_periph) = (uint32_t)pin;
}
/*!
\brief toggle GPIO port
\param[in] gpio_periph: GPIOx(x = A,B,C,D,E,F,G,H,I)
\param[out] none
\retval none
*/
void gpio_port_toggle(uint32_t gpio_periph)
{
GPIO_TG(gpio_periph) = 0x0000FFFFU;
}