[STM32F401-DISCO开发板]实验一、STM32F401 DISCO开发板介绍，点亮LED
( }. p  i5 {) I* U  X" d[STM32F401-DISCO开发板]实验二、驱显黑白LCD_6903，串口调试

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本实验较为简单，设置2论ADC采样和2路PWM输出，并且显示在LCD上同时从串口输出数据。
' u0 p. b  j: k4 B6 F0 I( A6 b定义对象：
AnalogIn adc0(PA_4);
AnalogIn adc1(PA_5);
PwmOut pwm0(PA_10);
5 ]2 P' a; L- }& H2 K7 e& kPwmOut pwm1(PA_8);
: g3 {' m  c/ q- @4 l' a1 HTicker tick;//Time Interupt Clock
//DigitalOut led(LED1);
Serial sout(PA_2,PA_3);//(USBTX, USBRX);
定义显示函数：
. U$ b+ p2 I% t( k+ j5 W8 Zvoid dispBase(void);
) r( A7 I8 X9 ]+ F; u+ \! vvoid dispMes(void);
3 W, y7 x9 E5 `8 Y$ M定义变量：
% |* O+ S: G& R( Y" S//DEFINE VARIABLE
int32_t jsq;
3 V  U; I& O- b* J* e2 ^float val0,val1,dut0=0.330f,dut1=0.450f,ddu0=0.003f,ddu1=0.002f;
int pdir0=1,pdir1=1,twAddr1=0xBC,twAddr2=0xBB;
char twData[2]={0,0};
! W% g7 G9 y% l" f% l定义中断Tick实现程序计数器：
, w& r0 m$ {$ h; Bvoid tipInt(void){jsq++;}
0 c, b% c5 w  Z5 P$ d0 N( M! ?, @定义GPIO[仅仅PWM周期]：
void ioInit(void){
: y: h% X! i2 K( \; p/ p$ A" p% _+ b pwm0.period(0.003f);//pwm0
pwm1.period(0.004f);//pwm1
1 D+ v8 g( O/ m& W, v$ B}
5 g; N* a3 O- [7 umain函数：
, E( ~$ A, H* zint main(){
ioInit();
$ }/ D& ~! L+ g lcdInit();
lcdClear();
7 T. d1 m5 q3 i# ]$ Z dispBase();
tick.attach(&tipInt,0.005f);
) C2 V) K  g7 i% f* f- U8 b0 { sout.printf("TEST 2ADC 2PWM a LCD Display\n\r");
8 v" H! @1 E: S9 Y8 O/ k/ C while(true){
  val0=adc0.read();
  val1=adc1.read();
  if(dut0>0.810f){pdir0=0;};if(dut0<0.180f){pdir0=1;}
  if(pdir0==0){dut0 -=ddu0;};if(pdir0==1){dut0 +=ddu0;}
; ?' X( B# t3 x+ y: R  pwm0=dut0;
0 Z% F6 C# n0 l3 A3 W5 G5 t$ O# l  if(dut1>0.610f){pdir1=0;};if(dut1<0.160f){pdir1=1;}
  if(pdir1==0){dut1 -=ddu1;};if(pdir1==1){dut1 +=ddu1;}
  pwm1=dut1;
  //i2c.read(twAddr1,twData,2);
( Y& f" q; j8 L1 [, E7 c" S: i; o  if((jsq/5)%5==1){dispMes();}
; J7 H4 E, i& M; i% N  sout.printf("ADC1=%0.4f ADC2=%0.4f PWM1=%0.3f PWM2=%0.3f ",val0,val1,dut0,dut1);
  sout.printf("DATA0:%d DATA1:%d \n\r",twData[0],twData[1]);
7 U/ b( d, S( w* [- Z# C0 N  Z  //led=!led;
0 d8 v/ d- Z* K1 ?- w1 U: @  //wait(0.05);
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显示固定字符函数：
//Display Base Meseger
void dispBase(void){
c2l(0,0,19);c2l(1,0,28);c2l(2,0,26);c2l(3,0,40);//JSQ:
c2l(0,1,10);c2l(1,1,13);c2l(2,1,0);c2l(3,1,40);//AD0:
) m# N& B+ ~+ o0 o: ? c2l(9,1,10);c2l(10,1,13);c2l(11,1,1);c2l(12,1,40);//AD1:
c2l(0,2,25);c2l(1,2,32);c2l(2,2,0);c2l(3,2,40);//PW0:
c2l(9,2,25);c2l(10,2,32);c2l(11,2,1);c2l(12,2,40);//PW1:
1 M* t6 i# L* N. C8 F; @+ x" f c2l(0,3,29);c2l(1,3,14);c2l(2,3,22);c2l(3,3,40);//TEM:
c2l(9,3,17);c2l(10,3,30);c2l(11,3,22);c2l(12,3,40);//HUM:
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2 V2 r6 t' m/ g# Q) s显示采样和PWM输出计数器输出数据：
2 M% Z3 C6 [6 ], c& m: V5 F//Display Messeg
void dispMes(void){
c2l(4,0,(jsq/1000000)%10);c2l(5,0,(jsq/100000)%10);c2l(6,0,(jsq/10000)%10);c2l(7,0,(jsq/1000)%10);//JSQ:
c2l(8,0,(jsq/100)%10);c2l(9,0,(jsq/10)%10);c2l(10,0,(jsq)%10);//JSQ:
& b" B. H1 x- e; _6 z c2l(4,1,int(val0*10)%10);c2l(5,1,int(val0*100)%10);c2l(6,1,int(val0*1000)%10);c2l(7,1,int(val0*10000)%10);//ad0
! B( B" C) E2 C c2l(13,1,int(val1*10)%10);c2l(14,1,int(val1*100)%10);c2l(15,1,int(val1*1000)%10);c2l(16,1,int(val1*10000)%10);//ad0
' W/ ?0 @4 K1 Y/ r6 D- @; o c2l(4,2,int(dut0*10)%10);c2l(5,2,int(dut0*100)%10);c2l(6,2,int(dut0*1000)%10);
c2l(13,2,int(dut1*10)%10);c2l(14,2,int(dut1*100)%10);c2l(15,2,int(dut1*1000)%10);
* J, b0 C: @* x9 |2 E: ?7 P c2l(4,3,(twData[0]/100)%10);c2l(5,3,(twData[0]/10)%10);c2l(6,3,(twData[0])%10);
0 g& w- U' B3 n0 l, ~) t c2l(13,3,(twData[1]/100)%10);c2l(14,3,(twData[1]/10)%10);c2l(15,3,(twData[1])%10);
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0 }4 c; w* I( k- n6 p6 l. Y编译后下载运行结果见照片和截图。照片31为硬件连接；照片32为LCD显示结果；照片33为PWM控制2个LED轮流渐亮暗；截图34为牟尼出口输出的ADC和PWM数据。

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