本帖最后由 damiaa 于 2019-1-23 15:43 编辑
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【STM8-SO8-DISCO】+(2) EXIT做按键点灯
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: Y0 L. k- G2 _4 U p7 p目的:为了验证STM8S001的IO EXTI功能,做个实验就是按下键改变灯的状态。
: K7 r( N1 C! J. m7 N1,在上个项目【STM8-SO8-DISCO】+ 基本定时器四中点灯的基础上改写
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2,根据原理图和资料定义按键- #define USER_BUTTON_GPIO_PORT (GPIOC)
9 t& J& Q3 V" Y5 Z: U - #define USER_BUTTON_GPIO_PINS (GPIO_PIN_3) //这里可以设置为PC3,PC4,PC5中任何一个。
复制代码 3,定义一个EXIT的初始化函数:
2 ^2 m/ V" {. S4 Z- void Exit_Init()" p5 M. @7 {+ P4 \7 Q- h
- {
1 \" m Q/ \1 z - GPIO_Init(USER_BUTTON_GPIO_PORT, (USER_BUTTON_GPIO_PINS),GPIO_MODE_IN_FL_IT);//GPIO初始化- }1 w! g9 F B, N& n% d5 |4 s4 w" |
- /* Initialize the Interrupt sensitivity */" p1 |) C+ `! h+ `
- EXTI_SetExtIntSensitivity(EXTI_PORT_GPIOC, EXTI_SENSITIVITY_FALL_ONLY);//EXIT 外部中断触发设置下降沿触发
' Q8 ~: ^& e0 r- c9 q- ~: ` - //EXTI_SetTLISensitivity(EXTI_TLISENSITIVITY_FALL_ONLY); stm8s001 没有最高外部中断IO PD7 4 ?3 O8 J7 c. w
- enableInterrupts();
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复制代码
8 J! I0 I; _2 E/ {" c! T5 ?4,中断里找到下面函数加入LED1_Toggle();
, p2 @4 {$ M: F* h- o2 b ]+ ?- INTERRUPT_HANDLER(EXTI_PORTC_IRQHandler, 5)/ @# R. F3 z8 L# S2 E
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- /* In order to detect unexpected events during development,
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- LED1_Toggle();0 i3 r" t7 ?- c/ `, r, t
- }
复制代码 5,注销到原来TIM4中断中的内容(避免效果不好)。; b/ K9 j, I0 V% N; b1 N
- INTERRUPT_HANDLER(TIM4_UPD_OVF_IRQHandler, 23), m4 t; B+ G3 Z6 }- q
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- /* In order to detect unexpected events during development,: c, r/ C: w) M# h" j* m8 f
- it is recommended to set a breakpoint on the following instruction.
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+ X8 b p5 M6 L, b' @$ ~: k - // static uint16_t tims=0;9 s4 u& Y/ x" r. J3 W
- // tims++;8 J2 A; c& _& F: W: ~0 B
- // if(tims >5000)
" k8 Q0 r8 Y' _( b" k L - // {
4 g0 n# b. a$ W( m, L - // tims =0;& m5 G* N- c% u7 p8 i" Y
- // LED1_Toggle();9 P8 F+ L! o, {0 a3 L% T$ j
- // } S% @% G; c/ F5 ]' ]. \0 g1 n; f
- }
复制代码 + Q i+ m; P. f. ?8 s7 b
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6,编译调试试验。/ @8 r; @3 m+ o) M- n2 s
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7,代码
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stm8s001test.zip
(4.37 MB, 下载次数: 4)
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