GPIO Examples

Table of Contents

• API-GPIO-CASE1:GPIO IRQ
• API-GPIO-CASE2:GPIO IRQ RSIC0
• API-GPIO-CASE3:GPIO IRQ RSIC1
• API-GPIO-CASE4:GPIO READ/WRITE/TOGGLE
• API-GPIO-CASE5:GPIO HIGH RESISTOR

Variables used in the following cases are defined as below

#define LED1                    GPIO_PD0
#define LED2                    GPIO_PD3
#define LED3                    GPIO_PD4
#define LED4                    GPIO_PD5

#define SW1                     GPIO_PD1
#define SW2                     GPIO_PD2

volatile unsigned int gpio_irq_cnt;

API-GPIO-CASE1:GPIO IRQ

Function	Sub-Function	APIs		Description	Update Status
irq_handler()	if((reg_irq_src & FLD_IRQ_GPIO_EN)==FLD_IRQ_GPIO_EN)			determine whether interrupt flag is right	2019-1-10
	reg_irq_src Ι= FLD_IRQ_GPIO_EN			clear interrrupt flag
	gpio_irq_cnt++			Interrupt processing
main()	cpu_wakeup_init()			CPU initialization function [Mandatory]
	clock_init()	clock_init(SYS_CLK_24M_Crystal)		Clock initialization function, System Clock is 24M RC by default [optional]
	rf_drv_init()	rf_drv_init(RF_MODE_BLE_1M)		RF mode initialization [optional]
	gpio_init(1)			GPIO initialization: set the initialization status of all GPIOs [optional]
	user_init()	gpio_set_func()	gpio_set_func(SW1 ,AS_GPIO)	set pin as GPIO
		gpio_set_output_en()	gpio_set_output_en(SW1, 0)	disable GPIO output
		gpio_set_input_en()	gpio_set_input_en(SW1 ,1)	enable GPIO input
		gpio_setup_up_down_resistor()	gpio_setup_up_down_resistor(SW1, PM_PIN_PULLUP_10K)	enable GPIO 10k resistor pull-up
		gpio_set_interrupt()	gpio_set_interrupt(SW1, POL_FALLING)	set pin as GPIO interrupt
	main_loop()	None		Main program loop

API-GPIO-CASE2:GPIO IRQ RSIC0

Function	Sub-Function	APIs		Description	Update Status
irq_handler()	if((reg_irq_src & FLD_IRQ_GPIO_RISC0_EN)==FLD_IRQ_GPIO_RISC0_EN)			determine whether interrupt flag is right	2019-1-10
	reg_irq_src Ι= FLD_IRQ_GPIO_RISC0_EN			clear interrrupt flag
	gpio_irq_cnt++			Interrupt processing
main()	cpu_wakeup_init()			CPU initialization function [Mandatory]
	clock_init()	clock_init(SYS_CLK_24M_Crystal)		Clock initialization function, System Clock is 24M RC by default [optional]
	rf_drv_init()	rf_drv_init(RF_MODE_BLE_1M)		RF mode initialization [optional]
	gpio_init(1)			GPIO initialization: set the initialization status of all GPIOs [optional]
	user_init()	gpio_set_func()	gpio_set_func(SW1 ,AS_GPIO)	set pin as GPIO
		gpio_set_output_en()	gpio_set_output_en(SW1, 0)	disable GPIO output
		gpio_set_input_en()	gpio_set_input_en(SW1 ,1)	enable GPIO input
		gpio_setup_up_down_resistor()	gpio_setup_up_down_resistor(SW1, PM_PIN_PULLUP_10K)	enable GPIO 10k resistor pull-up
		gpio_set_interrupt_risc0()	gpio_set_interrupt_risc0(SW1, POL_FALLING)	set pin as GPIO interrupt risc0
	main_loop()	None		Main program loop

API-GPIO-CASE3:GPIO IRQ RSIC1

Function	Sub-Function	APIs		Description	Update Status
irq_handler()	if((reg_irq_src & FLD_IRQ_GPIO_RISC1_EN)==FLD_IRQ_GPIO_RISC1_EN)			determine whether interrupt flag is right	2019-1-10
	reg_irq_src Ι= FLD_IRQ_GPIO_RISC1_EN			clear interrrupt flag
	gpio_irq_cnt++			Interrupt processing
main()	cpu_wakeup_init()			CPU initialization function [Mandatory]
	clock_init()	clock_init(SYS_CLK_24M_Crystal)		Clock initialization function, System Clock is 24M RC by default [optional]
	rf_drv_init()	rf_drv_init(RF_MODE_BLE_1M)		RF mode initialization [optional]
	gpio_init(1)			GPIO initialization: set the initialization status of all GPIOs [optional]
	user_init()	gpio_set_func()	gpio_set_func(SW1 ,AS_GPIO)	set pin as GPIO
		gpio_set_output_en()	gpio_set_output_en(SW1, 0)	disable GPIO output
		gpio_set_input_en()	gpio_set_input_en(SW1 ,1)	enable GPIO input
		gpio_setup_up_down_resistor()	gpio_setup_up_down_resistor(SW1, PM_PIN_PULLUP_10K)	enable GPIO 10k resistor pull-up
		gpio_set_interrupt_risc1()	gpio_set_interrupt_risc1(SW1, POL_FALLING)	set pin as GPIO interrupt risc1
	main_loop()	None		Main program loop

API-GPIO-CASE4:GPIO TOGGLE

Function	Sub-Function	APIs		Description	Update Status
irq_handler()	none			Interrupt handler function	2019-1-10
main()	cpu_wakeup_init()			CPU initialization function [Mandatory]
	clock_init()	clock_init(SYS_CLK_24M_Crystal)		Clock initialization function, System Clock is 24M RC by default [optional]
	rf_drv_init()	rf_drv_init(RF_MODE_BLE_1M)		RF mode initialization [optional]
	gpio_init(1)			GPIO initialization: set the initialization status of all GPIOs [optional]
	user_init()	gpio_set_func()	gpio_set_func(LED1 ,AS_GPIO)	set pin as GPIO
		gpio_set_output_en()	gpio_set_output_en(LED1, 1)	disable GPIO output
		gpio_set_input_en()	gpio_set_input_en(LED1 ,0)	enable GPIO input
		gpio_write(), gpio_read()	gpio_write(LED1, !gpio_read(LED1))	toggle GPIO
		gpio_toggle()	gpio_toggle(LED1)	toggle GPIO
	main_loop()	None		Main program loop

API-GPIO-CASE5:GPIO HIGH RESISTOR

Function	Sub-Function	APIs		Description	Update Status
irq_handler()	none			Interrupt handler function	2019-1-10
main()	cpu_wakeup_init()			CPU initialization function [Mandatory]
	clock_init()	clock_init(SYS_CLK_24M_Crystal)		Clock initialization function, System Clock is 24M RC by default [optional]
	rf_drv_init()	rf_drv_init(RF_MODE_BLE_1M)		RF mode initialization [optional]
	gpio_init(1)			GPIO initialization: set the initialization status of all GPIOs [optional]
	user_init()	gpio_shutdown()	gpio_shutdown(GPIO_ALL)	set all GPIOs as high resistor
	main_loop()	None		Main program loop

History Record

Date	Description	Author
2019-1-10	initial release	LJW