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本帖最后由 nyszx 于 2016-3-31 12:51 编辑 , q8 z% g3 p4 R; d . E9 P$ H6 j/ r/ r" i 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。 所需材料:除开发板外,一个发光二极管就OK 就是这么简陋!& N- e& S: @& F+ e1 z& [ 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。 " X- O' t( {/ Z: ]' H" P 程序是从自带Demo程序中改的。只留了TSL部分。) ~* U$ F* P `" K1 L m3 f" | PA1配置为TIM2 PWM HC2输出。很简单。 /* TIM2 chennel2 configuration : PA.01 */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;% K8 ~" _* Z3 J( o" I5 u GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;( l5 \* Q; o% P, S9 {7 p' g' H GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;2 `. r0 Y3 y3 W" S GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;- P. Q- l' q9 `; | GPIO_Init(GPIOA, &GPIO_InitStructure); * w$ \1 P1 t K( d2 C( H /* Connect TIM pin to AF2 */ GPIO_PinAFConfig(GPIOA, GPIO_PinSource1, GPIO_AF_2);+ P' v& M+ k% Q. T5 }3 z+ F% V! h5 l ?8 D+ P# f# {0 j0 ^0 m 接下来就是配置TIM2: TimerPeriod = (SystemCoreClock / 10000 ) - 1;& u8 q4 j# z+ j8 f" Z Channel2Pulse = (uint16_t) (((uint32_t) 10 * (TimerPeriod - 1)) / 10); ) Q, [" e& w; b7 o /* Time Base configuration */ TIM_TimeBaseStructure.TIM_Prescaler = 0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseStructure.TIM_Period = TimerPeriod; TIM_TimeBaseStructure.TIM_ClockDivision = 0; TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; 2 n) J3 h8 z! u# o TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);& t- h8 r& n- G6 Y& ?8 f3 [ q, K- B" t1 ]' v# q /* Channel 2 Configuration in PWM mode */% C/ E% n" V) C TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;2 }+ Q" ^- i3 v% |( _0 o TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;' ]/ T8 {- G, i3 M- g8 `( Y0 ^ TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;- d9 W; R4 y0 C, Z$ k TIM_OCInitStructure.TIM_Pulse = Channel2Pulse; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;, ]: q) x7 G1 o6 R Y0 h TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset; 3 G+ u3 z2 z4 U$ i6 L [) \ TIM_OC2Init(TIM2, &TIM_OCInitStructure); * V1 s* k b: a" P; m$ J( \ /* TIM2 counter enable */: w' e6 T% h1 h7 X TIM_Cmd(TIM2, ENABLE); # U/ g2 A$ G( V+ Q( u6 D F" H /* TIM2 Main Output Enable */) V' U8 A( [8 q. n/ \7 I! H4 j TIM_CtrlPWMOutputs(TIM2, ENABLE); 6 {6 n6 Q( A! @% O2 L 接下来配置触摸检测部分:8 P) U% f, b% _* Z/ C6 E1 D; _. R. ~ 亮度分了50级0 ^- o9 D9 l d4 N- ~ if (TSL_user_Action() == TSL_STATUS_OK)- O8 K5 A& i( }2 f { if (MyLinRots[0].p_Data->StateId == TSL_STATEID_DETECT && MyLinRots[0].p_Data->Position > 0) { T2=MyLinRots[0].p_Data->Position;& ~8 A: R* u2 X9 K) j; ] if (T2< T1) { if( Pulse<51)Pulse++;- p9 @: L! f! C; {4 C }* B* E7 r% r: I3 K8 L if (T2> T1)0 ?. t4 W6 H- f0 | { if( Pulse>0)Pulse--; } # L& S; `4 ?1 ~* _8 h T1=MyLinRots[0].p_Data->Position; }) u: P7 v; D* g' x( } }2 f! y9 }+ v- H' Z# J Channel2Pulse = (uint16_t) (((uint32_t) Pulse * (TimerPeriod - 1)) / 50); TIM_SetCompare2(TIM2, Channel2Pulse);7 q( O# _5 j5 V" F' `. t; f* |) G7 o/ @* ^ 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。: W+ d7 k# y. I0 s) [2 F& y . U5 B A4 |- v( c+ a 编译下载跑起来。视频: : C9 n# [! U* o W6 n0 s 忘记传代码了,补上 ![]() |
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