[STM32F401-DISCO开发板]实验一、STM32F401 DISCO开发板介绍，点亮LED
2 D: ~9 K* a5 H& k& b" p. m[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。
定义对象：
; M' i& U, I& \5 D, M( CAnalogIn adc0(PA_4);
AnalogIn adc1(PA_5);
PwmOut pwm0(PA_10);
PwmOut pwm1(PA_8);
Ticker tick;//Time Interupt Clock
4 c0 P$ e+ R: g* a) X//DigitalOut led(LED1);
Serial sout(PA_2,PA_3);//(USBTX, USBRX);
定义显示函数：
void dispBase(void);
+ ~6 K' d$ R' C+ a, o! B$ ]void dispMes(void);
* {" Y2 O" x( {7 S4 {7 |# {定义变量：
0 @& c2 W1 t, z9 t//DEFINE VARIABLE
int32_t jsq;
3 \4 y/ I0 F8 p7 y9 l6 c8 Zfloat val0,val1,dut0=0.330f,dut1=0.450f,ddu0=0.003f,ddu1=0.002f;
int pdir0=1,pdir1=1,twAddr1=0xBC,twAddr2=0xBB;
$ [6 _1 p. f  _3 p) {/ Vchar twData[2]={0,0};
0 Y2 p$ P4 K, V+ L定义中断Tick实现程序计数器：
void tipInt(void){jsq++;}
6 _9 J3 p+ L, R: ~& Y定义GPIO[仅仅PWM周期]：
void ioInit(void){
3 K- B% W5 z0 e) i6 k; ^ pwm0.period(0.003f);//pwm0
0 \; q. o# H" c' C  }5 ]9 T pwm1.period(0.004f);//pwm1
, m* |: d7 h# w/ q6 Q}
main函数：
* N$ K" r+ I" W. ^( s6 ^( V  k* zint main(){
! w' c" {# [* j7 l& u ioInit();
# y6 c9 O+ w1 H. v lcdInit();
lcdClear();
3 A: j; v( t4 S) a6 y5 @ dispBase();
# j8 m0 X9 v' |6 P tick.attach(&tipInt,0.005f);
' i0 |: P1 G! l" B: E4 y% W sout.printf("TEST 2ADC 2PWM a LCD Display\n\r");
9 v% j" [. i0 Y  C2 A% b' D& v while(true){
  val0=adc0.read();
  val1=adc1.read();
( [" F; u# |" h7 i0 O3 F4 S. R  if(dut0>0.810f){pdir0=0;};if(dut0<0.180f){pdir0=1;}
  if(pdir0==0){dut0 -=ddu0;};if(pdir0==1){dut0 +=ddu0;}
  pwm0=dut0;
0 n% l3 F$ ]6 O" z5 ?2 p  if(dut1>0.610f){pdir1=0;};if(dut1<0.160f){pdir1=1;}
  if(pdir1==0){dut1 -=ddu1;};if(pdir1==1){dut1 +=ddu1;}
4 o) s: R) T8 d3 K5 Q( Q  pwm1=dut1;
, }" c! R, ~, c  //i2c.read(twAddr1,twData,2);
  if((jsq/5)%5==1){dispMes();}
3 q& _2 w6 B, c# B- K  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]);
& x- p1 ^$ g# i/ [! K  //led=!led;
7 S9 {& }6 t3 x0 c9 [  //wait(0.05);
}
}
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:
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:
" y  x2 U9 F! i4 E2 W c2l(9,2,25);c2l(10,2,32);c2l(11,2,1);c2l(12,2,40);//PW1:
c2l(0,3,29);c2l(1,3,14);c2l(2,3,22);c2l(3,3,40);//TEM:
6 U+ ~- N, z3 K1 q c2l(9,3,17);c2l(10,3,30);c2l(11,3,22);c2l(12,3,40);//HUM:
}
3 ^# w+ o4 c. s4 F显示采样和PWM输出计数器输出数据：
//Display Messeg
void dispMes(void){
4 V1 J  {' N, l 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:
) h% _% ]; F4 K, L% | c2l(8,0,(jsq/100)%10);c2l(9,0,(jsq/10)%10);c2l(10,0,(jsq)%10);//JSQ:
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
/ w3 e: w- H2 N8 l- ^# X* u8 {/ @ 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
c2l(4,2,int(dut0*10)%10);c2l(5,2,int(dut0*100)%10);c2l(6,2,int(dut0*1000)%10);
+ N# t  S# K2 h: r c2l(13,2,int(dut1*10)%10);c2l(14,2,int(dut1*100)%10);c2l(15,2,int(dut1*1000)%10);
c2l(4,3,(twData[0]/100)%10);c2l(5,3,(twData[0]/10)%10);c2l(6,3,(twData[0])%10);
c2l(13,3,(twData[1]/100)%10);c2l(14,3,(twData[1]/10)%10);c2l(15,3,(twData[1])%10);
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. l# g- [; {1 [8 p3 e1 F; Z0 ~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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