本帖最后由 damiaa 于 2019-1-23 15:43 编辑
2 B0 ~- ^- |2 l% a" Y
* \5 K. d6 }" Y+ L& E 【STM8-SO8-DISCO】+(2) EXIT做按键点灯
! X9 G, w( J5 i; x( F
8 S; C+ p& s/ [" G9 c$ f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。
: W( j) Y/ I2 P' \4 Y" j1,在上个项目【STM8-SO8-DISCO】+ 基本定时器四中点灯的基础上改写
0 y) p0 r" A3 [+ A" B" i7 B6 y6 y( k0 U* K) m9 l* e' a. _
2,根据原理图和资料定义按键- #define USER_BUTTON_GPIO_PORT (GPIOC)
' _2 h* q7 g( y6 p8 ^: [+ L7 ] - #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:) n7 }3 N9 x- J @. p
- void Exit_Init()
+ a8 f# w i% `6 ?5 }, v0 C* Q0 _- B - {# U/ S; H/ [3 ~, C3 ~* a
- GPIO_Init(USER_BUTTON_GPIO_PORT, (USER_BUTTON_GPIO_PINS),GPIO_MODE_IN_FL_IT);//GPIO初始化7 Y! [+ d" D9 H
- /* Initialize the Interrupt sensitivity */
8 p/ c& Q" T j( D. I. r9 ^ - EXTI_SetExtIntSensitivity(EXTI_PORT_GPIOC, EXTI_SENSITIVITY_FALL_ONLY);//EXIT 外部中断触发设置下降沿触发
" t' e7 \1 f. w( c. V6 M6 a - //EXTI_SetTLISensitivity(EXTI_TLISENSITIVITY_FALL_ONLY); stm8s001 没有最高外部中断IO PD7 & ]1 V m* A5 J8 o2 F p( W F: _
- enableInterrupts();
2 t. k9 [0 Q& l! H, e- ]1 b5 A - }
复制代码 ( _4 M6 N# o! ~7 J9 l9 O
4,中断里找到下面函数加入LED1_Toggle();
( _1 E9 z3 f7 m n$ z0 j+ i2 R- INTERRUPT_HANDLER(EXTI_PORTC_IRQHandler, 5)
& Z9 S' j Z l m: h - {2 l8 l; Z$ H, R: L; S: v
- /* In order to detect unexpected events during development,
' X- O9 M) A: Y P - it is recommended to set a breakpoint on the following instruction.$ m" T& d# Z# E T! L" m2 z
- */9 W }7 @. T* q. c2 |# x
- LED1_Toggle();3 O. a; `* h5 a3 p+ a y
- }
复制代码 5,注销到原来TIM4中断中的内容(避免效果不好)。/ I, m r: b& M8 t. X
- INTERRUPT_HANDLER(TIM4_UPD_OVF_IRQHandler, 23)$ \/ F2 j4 N5 |( Y. G C6 `# p
- {
3 y. G! [, n) L4 W% D - /* In order to detect unexpected events during development,
( p( t' }+ o2 ~6 s% `$ y - it is recommended to set a breakpoint on the following instruction.4 J0 |9 e% d( \$ Z4 a7 c6 G( b$ N; Z
- */& T0 H/ D4 O& Z- s, I- |5 g. X
- // static uint16_t tims=0;
{6 k+ ?" ?" L, j: t I4 a& l7 e - // tims++;5 v8 u( `0 p8 H% N
- // if(tims >5000)( K- e, w0 `9 v) c6 k! E) R
- // { ! f* k" M6 y l" E6 f
- // tims =0;: K2 H; z6 a/ ~& m2 g* X. _* ~+ f
- // LED1_Toggle();
" b# j4 M3 U3 G; r3 U3 ^- ` ] - // }8 Z: Z8 R6 V; ]" K( n* K. m8 \! ^
- }
复制代码 / t6 m$ x( m( E$ H
2 i k! j2 v1 ~$ T! z
% `4 l n R7 m$ E& J, H6,编译调试试验。
2 z6 ?/ Z% a( Z. a4 N
7 q; S. K& O) q. i: N& }2 T
& v; }0 a. C1 k& S2 ~% |7,代码- J" [; \/ g1 l6 |, H$ F( H X9 v1 F
stm8s001test.zip
(4.37 MB, 下载次数: 4)
|