基于STM32的波形发生器.docx

基于STM32的波形发生器.docx

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基于STM32的波形发生器

#include"stm32f10x.h"

#include"pcf8591.h"

voidRCC_Config（void）;

voidGPIO_Config（void）;

externuint8_tpcf8591_read（uint8_tcmd）;

voidDelay_d（__IOuint32_tt）;

externboolpcf8591_write（uint8_tcmd,uint8_t*data,uint32_tlength）;

voidTimeDecrement（void）;

voidDelay_us（__IOuint32_tt）;

externuint32_tcounter;

static__IOuint32_tTimingDelay;

voidkey_delay（__IOuint32_tt）;

uint8_tkey_scan（void）;

uint8_tkey_fscan（void）;

uint8_tans=0;

floatvol=0;

uint8_tSine12bit[256]={0x80,0x83,0x86,0x89,0x8c,0x8f,0x92,0x95,0x98,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae,0xb0,0xb3,

0xb6,0xb9,0xbc,0xbf,0xc1,0xc4,0xc7,0xc9,0xcc,0xce,0xd1,0xd3,0xd5,0xd8,0xda,0xdc,0xde,0xe0,0xe2,0xe4,0xe6,0xe8,0xea,0xec,

0xed,0xef,0xf0,0xf2,0xf3,0xf4,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfc,0xfd,0xfe,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,

0xff,0xff,0xff,0xff,0xfe,0xfe,0xfd,0xfc,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf3,0xf2,0xf0,0xef,0xed,0xec,0xea,0xe8,

0xe6,0xe4,0xe3,0xe1,0xde,0xdc,0xda,0xd8,0xd6,0xd3,0xd1,0xce,0xcc,0xc9,0xc7,0xc4,0xc1,0xbf,0xbc,0xb9,0xb6,0xb4,0xb1,0xae,

0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x99,0x96,0x92,0x8f,0x8c,0x89,0x86,0x83,0x80,0x7d,0x79,0x76,0x73,0x70,0x6d,0x6a,0x67,0x64,

0x61,0x5e,0x5b,0x58,0x55,0x52,0x4f,0x4c,0x49,0x46,0x43,0x41,0x3e,0x3b,0x39,0x36,0x33,0x31,0x2e,0x2c,0x2a,0x27,0x25,0x23,

0x21,0x1f,0x1d,0x1b,0x19,0x17,0x15,0x14,0x12,0x10,0xf,0xd,0xc,0xb,0x9,0x8,0x7,0x6,0x5,0x4,0x3,0x3,0x2,0x1,0x1,0x0,0x0,

0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x1,0x1,0x2,0x3,0x3,0x4,0x5,0x6,0x7,0x8,0x9,0xa,0xc,0xd,0xe,0x10,0x12,0x13,0x15,0x17,

0x18,0x1a,0x1c,0x1e,0x20,0x23,0x25,0x27,0x29,0x2c,0x2e,0x30,0x33,0x35,0x38,0x3b,0x3d,0x40,0x43,0x46,0x48,0x4b,0x4e,0x51,

0x54,0x57,0x5a,0x5d,0x60,0x63,0x66,0x69,0x6c,0x6f,0x73,0x76,0x79,0x7c};

uint8_tsq12bit[32]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50};//方波

uint8_ttrangle[32]={0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,

30,28,26,24,22,20,18,16,14,12,10,8,6,4,2};//三角波

uint8_txiebo[32]={0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,

34,36,38,40,42,44,46,48,50,52,54,56,58,60,62};//谐波

uint8_tkey,keyf;

uint8_ti,j;

intmain（void）

{

RCC_Config（）;

GPIO_Config（）;

SysTick_Config（72）;//1us

while

（1）

{key=key_scan（）;

keyf=key_fscan（）;

switch（key%4）

{

case0:

pcf8591_write（0x40,Sine12bit,256）;

break;

case1:

pcf8591_write（0x40,sq12bit,32）;

break;

case2:

pcf8591_write（0x40,trangle,32）;

break;

case3:

pcf8591_write（0x40,xiebo,32）;

break;

default:

break;

}

switch（keyf%5）

{

case0:

if（key%4==0）

{

pcf8591_write（0x40,Sine12bit,256）;

}

elseif（key%4==1）

{

pcf8591_write（0x40,sq12bit,32）;

}

elseif（key%4==2）

{

pcf8591_write（0x40,trangle,32）;

}

elseif（key%4==3）

{

pcf8591_write（0x40,xiebo,32）;

}

break;

case1:

if（key%4==0）

{

pcf8591_write（0x40,Sine12bit,256）;

}

elseif（key%4==1）

{

pcf8591_write（0x40,sq12bit,32）;

}

elseif（key%4==2）

{

pcf8591_write（0x40,trangle,32）;

}

elseif（key%4==3）

{

pcf8591_write（0x40,xiebo,32）;

}

break;

case2:

if（key%4==0）

{

pcf8591_write（0x40,Sine12bit,256）;

}

elseif（key%4==1）

{

pcf8591_write（0x40,sq12bit,32）;

}

elseif（key%4==2）

{

pcf8591_write（0x40,trangle,32）;

}

elseif（key%4==3）

{

pcf8591_write（0x40,xiebo,32）;

}

break;

case3:

if（key%4==0）

{

pcf8591_write（0x40,Sine12bit,256）;

}

elseif（key%4==1）

{

pcf8591_write（0x40,sq12bit,32）;

}

elseif（key%4==2）

{

pcf8591_write（0x40,trangle,32）;

}

elseif（key%4==3）

{

pcf8591_write（0x40,xiebo,32）;

}

break;

case4:

if（key%4==0）

{

pcf8591_write（0x40,Sine12bit,256）;

}

elseif（key%4==1）

{

pcf8591_write（0x40,sq12bit,32）;

}

elseif（key%4==2）

{

pcf8591_write（0x40,trangle,32）;

}

elseif（key%4==3）

{

pcf8591_write（0x40,xiebo,32）;

}

break;

default:

break;

}

}

}

voidDelay_us（__IOuint32_tt）

{

TimingDelay=t;

while（TimingDelay!

=0）;

}

voidTimeDecrement（void）

{

if（TimingDelay!

=0）

{

TimingDelay--;

}

}

voidRCC_Config（void）

{

SystemInit（）;

RCC_APB2PeriphClockCmd（RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO,ENABLE）;

}

voidGPIO_Config（void）

{

GPIO_InitTypeDefGPIO_InitStructure;

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0|GPIO_Pin_1;//SDASCL

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_OD;

GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;

GPIO_Init（GPIOC,&GPIO_InitStructure）;

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_5|GPIO_Pin_2|GPIO_Pin_3;//按键

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPU;

GPIO_Init（GPIOC,&GPIO_InitStructure）;

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_5;

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;//LED

GPIO_InitStructure.GPIO_Spe