Timer Examples

Table of Contents

• API-TIMER-CASE1:TIMER SYS CLOCK MODE
• API-TIMER-CASE2:TIMER GPIO TRIGGER MODE
• API-TIMER-CASE3:TIMER GPIO WIDTH MODE
• API-TIMER-CASE4:TIMER TICK MODE
• API-TIMER-CASE5:TIMER WATCHDOG MODE

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

API-TIMER-CASE1:TIMER SYS CLOCK MODE

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()	gpio_init(1)		GPIO initialization: set the initialization status of all GPIOs [optional]
	user_init()	timer2_set_mode()	timer2_set_mode(TIMER_MODE_SYSCLK,0,1000 * CLOCK_SYS_CLOCK_1MS)	set the mode and parameter for timer2
		timer_start()	timer_start(TIMER2)	start timer2
	main_loop()	none		Main program loop

API-TIMER-CASE2:TIMER GPIO TRIGGER MODE

Function	Sub-Function	APIs		Description	Update Status
irq_handler()	if(reg_tmr_sta & FLD_TMR_STA_TMR2 == FLD_TMR_STA_TMR2)			determine whether timer2 interrupt flag is right	2019-1-10
	reg_tmr_sta Ι= FLD_TMR_STA_TMR2			clear interrupt flag
	timer2_irq_cnt ++			interrupt processing function
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()	gpio_init(1)		GPIO initialization: set the initialization status of all GPIOs [optional]
	user_init()	timer2_gpio_init()	timer2_gpio_init(SW1, POL_FALLING)	open interrupt of the specified pin for timer2
		irq_enable()		enable global interrupt
		timer2_set_mode()	timer2_set_mode(TIMER_MODE_GPIO_TRIGGER,0,3)	set the mode and parameter for timer2
		timer_start()	timer_start(TIMER2)	start timer2
	main_loop()	none		Main program loop

API-TIMER-CASE3:TIMER GPIO WIDTH MODE

Function	Sub-Function	APIs		Description	Update Status
irq_handler()	if(reg_tmr_sta & FLD_TMR_STA_TMR2 == FLD_TMR_STA_TMR2)			determine whether timer2 interrupt flag is right	2019-1-10
	reg_tmr_sta Ι= FLD_TMR_STA_TMR2			clear interrupt flag
	gpio_width = reg_tmr2_tick			get the tick of gpio width
	reg_tmr2_tick = 0			clear tick of timer2 to count again
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()	gpio_init(1)		GPIO initialization: set the initialization status of all GPIOs [optional]
	user_init()	timer2_gpio_init()	timer2_gpio_init(SW1, POL_FALLING)	open interrupt of the specified pin for timer2
		irq_enable()		enable global interrupt
		timer2_set_mode()	timer2_set_mode(TIMER_MODE_GPIO_WIDTH,0,0)	set the mode and parameter for timer2
		timer_start()	timer_start(TIMER2)	start timer2
	main_loop()	none		Main program loop

API-TIMER-CASE4:TIMER TICK MODE

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()	gpio_init(1)		GPIO initialization: set the initialization status of all GPIOs [optional]
	user_init()	timer2_set_mode()	timer2_set_mode(TIMER_MODE_TICK,0,0)	set the mode and parameter for timer2
		timer_start()	timer_start(TIMER2)	start timer2
	main_loop()	none		Main program loop

API-TIMER-CASE5:TIMER WATCHDOG MODE

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()	gpio_init(1)		GPIO initialization: set the initialization status of all GPIOs [optional]
	user_init()	wd_set_interval_ms()	wd_set_interval_ms(1000,CLOCK_SYS_CLOCK_1MS)	set parameter for watchdog mode of timer2
		wd_start()		start watchdog
	main_loop()	wd_clear()		feed the dog

History Record

Date	Description	Author
2019-1-10	initial release	LJW