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本帖最后由 nyszx 于 2016-3-31 12:51 编辑 8 R1 g% F' d1 h, k! n9 Q7 K 7 _0 t! y8 ~6 q/ T5 a 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。" u! z" y7 \% @' ]2 R( \ 所需材料:除开发板外,一个发光二极管就OK7 h) a- {$ U/ |/ Y4 \0 l3 D 就是这么简陋!' J+ ~- t' I' Q0 Z- ]5 s% M 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。 N- I* C+ w# W; g 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 */% Z+ k) }' l @9 O. R. P GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;+ z) Y8 ?! k& ?- L+ b& z$ X GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;% e$ O9 S8 A2 ?' i5 N GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ; GPIO_Init(GPIOA, &GPIO_InitStructure);' N5 }; W* o* {8 L* | " h) y- q" Q; ]6 a0 ^ /* Connect TIM pin to AF2 */ GPIO_PinAFConfig(GPIOA, GPIO_PinSource1, GPIO_AF_2);) [! |3 o9 ^6 P1 P . h. z7 R& J0 L5 S0 p! G 接下来就是配置TIM2: . v/ ^+ c( i+ b. v/ T8 z9 J0 Z TimerPeriod = (SystemCoreClock / 10000 ) - 1;& ~9 x- T; M5 j! Q. O Channel2Pulse = (uint16_t) (((uint32_t) 10 * (TimerPeriod - 1)) / 10); /* Time Base configuration */ TIM_TimeBaseStructure.TIM_Prescaler = 0;: @( P4 t. |0 p' R' K TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseStructure.TIM_Period = TimerPeriod; TIM_TimeBaseStructure.TIM_ClockDivision = 0; TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;& M0 D- @, ~- \ y6 m7 p : y5 m4 S' C& o TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); /* Channel 2 Configuration in PWM mode */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;& X- i! u/ ?% J1 }7 I. i$ ] TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;% @0 p7 x$ T" T- K: ?& E- o TIM_OCInitStructure.TIM_Pulse = Channel2Pulse; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;2 e* A% a0 O# v TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset; 4 p" O3 k4 }, O, ~; d N0 Y- P TIM_OC2Init(TIM2, &TIM_OCInitStructure);/ x! ~, C* Z* } /* TIM2 counter enable */. ~" V+ a2 N) @! v, c0 e TIM_Cmd(TIM2, ENABLE); 8 d( r/ C. N$ ~8 K /* TIM2 Main Output Enable */ TIM_CtrlPWMOutputs(TIM2, ENABLE);/ ^+ E2 X. s3 O* F: A: ?2 f I6 x4 I0 T2 G, L 接下来配置触摸检测部分: 亮度分了50级2 o5 N9 c0 ]2 s8 ^2 d' Y- y if (TSL_user_Action() == TSL_STATUS_OK)4 \; e! H0 F, ]$ @4 ] |2 y { ( N7 [1 x- X1 r g2 ? if (MyLinRots[0].p_Data->StateId == TSL_STATEID_DETECT && MyLinRots[0].p_Data->Position > 0)# ~, U$ k0 J+ P/ Z, W% W { T2=MyLinRots[0].p_Data->Position;7 H( O$ F6 Q. R# `1 A$ p if (T2< T1) {6 o, B! _! V/ Z' X1 v if( Pulse<51)Pulse++; }! `' B0 k( O4 m g; h! I# N if (T2> T1) {: v( a/ e- h& P' h" P) F" _ if( Pulse>0)Pulse--; }* t2 Y8 h! n: a5 v, O) C/ c6 E 8 m w5 |- R' j+ G: q3 n T1=MyLinRots[0].p_Data->Position;, H/ y$ |- h! ^- O- u } } Channel2Pulse = (uint16_t) (((uint32_t) Pulse * (TimerPeriod - 1)) / 50); TIM_SetCompare2(TIM2, Channel2Pulse); 1 x) s1 x0 \+ A 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。 其他的没用到的都删了。 ( ^7 O" k4 C/ _* r4 d# ]3 E) R$ z 编译下载跑起来。视频:, @4 P; E9 U5 y# e' O& R5 R 3 h9 u; F" V2 v1 q* ^ 忘记传代码了,补上6 a) g: I( @# a+ m8 v) u8 J1 { ![]() |
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