本帖最后由 nyszx 于 2016-3-31 12:51 编辑 " S: X: F \6 P3 c, c( I; R& T 0 U6 V5 n! V9 \6 { 有幸得到的STM32F072B-Discovery板子 ,现在又对 NUCLEO-F446ZE 开发板(重点在F4+eth)垂涎三尺。第一次接触STM32的TSL,官方带驱动,有时间就搞了个触摸调光的程序测试一下。给大家分享一下,玩具级,比较简陋,大神勿喷。仅供测试参考。 , Z& I) O5 q! E3 s 所需材料:除开发板外,一个发光二极管就OK3 T3 B; i+ i) _* R$ V. L$ ^' z 就是这么简陋!! v) w: c* [3 N' M# c2 F 为了实现调光,当然首选PWM输出驱动LED,本人很懒,找了个白色发光二级管,连驱动电路都没焊接,直接把管脚用手掰一掰,卡在PA1和VDD插针上。 - B J8 F0 }& E, |' [" T 程序是从自带Demo程序中改的。只留了TSL部分。 PA1配置为TIM2 PWM HC2输出。很简单。 /* TIM2 chennel2 configuration : PA.01 */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;5 c. y" b/ `& D GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;, G: M% O" E8 `1 Y a! r7 O GPIO_Init(GPIOA, &GPIO_InitStructure);. w$ N$ E- F/ Z+ s5 `" h( t 3 Z1 t: I$ ]+ W8 {6 q /* Connect TIM pin to AF2 */ GPIO_PinAFConfig(GPIOA, GPIO_PinSource1, GPIO_AF_2);! U5 m! T% k' O. l! d/ `( ~ 接下来就是配置TIM2:# H7 O. y/ t0 U2 ]. L TimerPeriod = (SystemCoreClock / 10000 ) - 1;( C( }* B7 a+ D Channel2Pulse = (uint16_t) (((uint32_t) 10 * (TimerPeriod - 1)) / 10);: E, [1 }" y6 h) d /* Time Base configuration */- J2 ~% e# |( l; g: c$ Z: Z TIM_TimeBaseStructure.TIM_Prescaler = 0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseStructure.TIM_Period = TimerPeriod;/ e1 @; v( R- d1 E0 l* m: ?) F TIM_TimeBaseStructure.TIM_ClockDivision = 0; TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); /* Channel 2 Configuration in PWM mode */* V+ U$ a8 ]3 l" e TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;. j, A7 M5 L* w8 `. S q+ Y6 L TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;# d# n0 u1 v5 q2 ~8 q! @ B7 f, v# e0 e TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; TIM_OCInitStructure.TIM_Pulse = Channel2Pulse;' ^7 q) H) {+ ~ TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;' Y4 d' |. `( n/ O! S5 G4 ? TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset; 0 d9 S9 }1 x- R. m; `4 e& G- W TIM_OC2Init(TIM2, &TIM_OCInitStructure); /* TIM2 counter enable */: k7 x7 v* c3 @0 U& a1 ?7 T TIM_Cmd(TIM2, ENABLE);& c4 X0 F1 m5 U 8 J* I/ G2 ]( s& P; ? /* TIM2 Main Output Enable */8 {+ p4 M! Z/ B+ H! G8 r TIM_CtrlPWMOutputs(TIM2, ENABLE); ! V1 M d: L, S, E 接下来配置触摸检测部分:, o, E$ F* A1 }" t' s# A 亮度分了50级' H8 a/ Z' M7 A# L9 ^) | if (TSL_user_Action() == TSL_STATUS_OK)% t j' a4 K. [ @1 W# A9 U { if (MyLinRots[0].p_Data->StateId == TSL_STATEID_DETECT && MyLinRots[0].p_Data->Position > 0)! z$ S) {, O$ X& L# x2 T' H1 ^( q {2 X) c, a" i6 g# S' ^% D) S T2=MyLinRots[0].p_Data->Position; if (T2< T1)2 z1 ^* R: u" u; _- | { if( Pulse<51)Pulse++; }2 T. s* D# Y6 a if (T2> T1)" ]& K8 P$ x# g; N N/ p2 n7 S6 R% F { if( Pulse>0)Pulse--; } T1=MyLinRots[0].p_Data->Position; } y2 O r9 z' e S V" V5 M/ H8 M7 h }0 c$ \, y7 Y8 t+ e' |+ s2 l( H A Channel2Pulse = (uint16_t) (((uint32_t) Pulse * (TimerPeriod - 1)) / 50); TIM_SetCompare2(TIM2, Channel2Pulse); 0 ^9 X b; J6 U 这里其实还可以优化一下,比如没有触摸时就不用设定占空比了。, T: s1 c5 b2 \: w- x5 y 其他的没用到的都删了。; x: K5 j& v- r; c& X# w 2 H$ h* J8 c* T: W/ I/ l 编译下载跑起来。视频:# t& ] S0 G1 Q. G; l* } q# Y # j. k" t$ m" N 忘记传代码了,补上" x) H( k' x. X* n3 y: t |
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