[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。
* F7 s" |+ h. x9 ^定义对象：
AnalogIn adc0(PA_4);
: S8 A  b# Y  Q/ @* S% J* g% F9 MAnalogIn adc1(PA_5);
PwmOut pwm0(PA_10);
- T1 t: V' g2 |6 q: uPwmOut pwm1(PA_8);
Ticker tick;//Time Interupt Clock
//DigitalOut led(LED1);
6 F9 r/ i) Y& l4 pSerial sout(PA_2,PA_3);//(USBTX, USBRX);
定义显示函数：
- N5 u; y# l. f0 bvoid dispBase(void);
void dispMes(void);
% ^& a) L" a3 s3 X- Q4 u& H' ^5 M定义变量：
//DEFINE VARIABLE
int32_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};
: S* X8 l* k* b) m0 o1 `定义中断Tick实现程序计数器：
4 \' N; S8 B3 X0 F1 r$ S; U3 pvoid tipInt(void){jsq++;}
8 @! b0 o: }* K4 M8 _定义GPIO[仅仅PWM周期]：
0 l" |* K4 ^( b+ L9 {$ i6 Avoid ioInit(void){
+ r: ?, e0 U+ h8 W% ?$ F+ i pwm0.period(0.003f);//pwm0
/ M; C! I6 P5 Q pwm1.period(0.004f);//pwm1
. |% J* i/ o% l1 w4 Y}
5 z' O" h! t( G/ Lmain函数：
# S6 D' Z# [+ T* a% n$ gint main(){
% p+ K6 \# d1 @  `1 C' e ioInit();
lcdInit();
lcdClear();
dispBase();
% q+ C# g) ?$ o. C5 M. x3 c tick.attach(&tipInt,0.005f);
sout.printf("TEST 2ADC 2PWM a LCD Display\n\r");
while(true){
  val0=adc0.read();
7 q8 w% k& D( {- V  val1=adc1.read();
  if(dut0>0.810f){pdir0=0;};if(dut0<0.180f){pdir0=1;}
, R$ q/ T- P9 X1 g2 v  if(pdir0==0){dut0 -=ddu0;};if(pdir0==1){dut0 +=ddu0;}
; i+ f. G0 s/ w% |! A4 X  pwm0=dut0;
% M; F' k( h- K" ~# u& N6 d0 W  v  if(dut1>0.610f){pdir1=0;};if(dut1<0.160f){pdir1=1;}
  ^( A6 }7 |/ l  P, ~; ^" i  if(pdir1==0){dut1 -=ddu1;};if(pdir1==1){dut1 +=ddu1;}
  pwm1=dut1;
  }7 h4 [. d. y  //i2c.read(twAddr1,twData,2);
9 w2 k$ w3 J! q+ k  if((jsq/5)%5==1){dispMes();}
  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]);
* ], K6 l; f* d& A; a4 V  //led=!led;
  //wait(0.05);
}
}
显示固定字符函数：
9 Q  \7 `; J& ]7 y* z) f0 E//Display Base Meseger
void dispBase(void){
) N6 C" a7 L  I 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:
$ p0 T" [2 G- r9 U; @2 t c2l(0,2,25);c2l(1,2,32);c2l(2,2,0);c2l(3,2,40);//PW0:
. P! M" I1 y# V! o- b c2l(9,2,25);c2l(10,2,32);c2l(11,2,1);c2l(12,2,40);//PW1:
: v' a) j- C2 h: y 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:
}
显示采样和PWM输出计数器输出数据：
//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:
( s3 k6 C8 h4 a0 j6 Q* L6 w 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);
2 y- D! ?& d, |2 [ c2l(13,2,int(dut1*10)%10);c2l(14,2,int(dut1*100)%10);c2l(15,2,int(dut1*1000)%10);
. q6 _8 H: R  [/ O1 M6 F c2l(4,3,(twData[0]/100)%10);c2l(5,3,(twData[0]/10)%10);c2l(6,3,(twData[0])%10);
1 _( Y* Q1 z1 i1 w* |& ~3 q 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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