[STM32F401-DISCO开发板]实验一、STM32F401 DISCO开发板介绍，点亮LED
[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：
! o6 W5 c. @2 U4 D! WAnalogIn adc0(PA_4);
AnalogIn adc1(PA_5);
PwmOut pwm0(PA_10);
PwmOut pwm1(PA_8);
  R0 l) r) Y5 m5 J/ h- \Ticker tick;//Time Interupt Clock
//DigitalOut led(LED1);
* w# K2 P/ g: \& uSerial sout(PA_2,PA_3);//(USBTX, USBRX);
定义显示函数：
/ K6 z4 k7 X' l& V2 Gvoid dispBase(void);
3 L% a* O8 E( H( _8 ~void dispMes(void);
6 x' s6 G3 A) ~2 r: R, S) w! ]定义变量：
//DEFINE VARIABLE
* t3 J; M% Z& ]" V- cint32_t jsq;
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};
" u* p3 E' q0 e& `  N2 p: M/ l定义中断Tick实现程序计数器：
6 f( ~" e: A: P  @9 E* Svoid tipInt(void){jsq++;}
$ @+ Y2 c; t! H/ s3 t+ }定义GPIO[仅仅PWM周期]：
void ioInit(void){
( a! [2 T! U5 t* r pwm0.period(0.003f);//pwm0
: o( ^' G  W! o: M7 t pwm1.period(0.004f);//pwm1
}
main函数：
! L3 c& R$ ^) T0 d' g$ Mint main(){
ioInit();
! B* E& y$ }" E' Q lcdInit();
lcdClear();
' M' Q3 y/ `- K" T; W& | dispBase();
tick.attach(&tipInt,0.005f);
! r" U3 _  l8 ]. ~ sout.printf("TEST 2ADC 2PWM a LCD Display\n\r");
while(true){
  val0=adc0.read();
  val1=adc1.read();
( ^+ w8 q# P/ v' W' A  if(dut0>0.810f){pdir0=0;};if(dut0<0.180f){pdir0=1;}
9 B& j7 u/ E; y! q+ a7 X  if(pdir0==0){dut0 -=ddu0;};if(pdir0==1){dut0 +=ddu0;}
! z  P/ q9 n% I  pwm0=dut0;
  if(dut1>0.610f){pdir1=0;};if(dut1<0.160f){pdir1=1;}
  if(pdir1==0){dut1 -=ddu1;};if(pdir1==1){dut1 +=ddu1;}
  pwm1=dut1;
5 F" o% Q2 j6 w4 c3 O) `4 [  //i2c.read(twAddr1,twData,2);
3 \+ y% I- F0 r5 D& D8 x  if((jsq/5)%5==1){dispMes();}
  sout.printf("ADC1=%0.4f ADC2=%0.4f PWM1=%0.3f PWM2=%0.3f ",val0,val1,dut0,dut1);
" K! |* ?% Z. }$ D0 k6 ~$ Z  sout.printf("DATA0:%d DATA1:%d \n\r",twData[0],twData[1]);
  //led=!led;
  //wait(0.05);
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% w0 l  h" A7 M" \2 a2 o, l" W显示固定字符函数：
7 j2 @& p, F& a" Y- A//Display Base Meseger
void dispBase(void){
# s# K$ A. t  o) h: |# ~" M 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:
4 }- c; g) ~1 z6 B0 P5 ] c2l(0,2,25);c2l(1,2,32);c2l(2,2,0);c2l(3,2,40);//PW0:
$ _* a4 v4 a; J/ K  ^3 Q 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:
5 Q9 @! e- p2 V1 X9 g8 U c2l(9,3,17);c2l(10,3,30);c2l(11,3,22);c2l(12,3,40);//HUM:
}
显示采样和PWM输出计数器输出数据：
//Display Messeg
void dispMes(void){
, X; U4 g) K( G9 \* F2 _ 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:
8 i9 ^3 }/ ^; i 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
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);
5 g' t! Z$ G8 k" B0 \ 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);
}
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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