main.c

旋极2410开发板DA转换试验代码？

#include <string.h>
#include <stdarg.h>
#include "2410addr.h"
#include "def.h"
#include "INT.h"
#include "consol.h"
#include "2410lib.h"


/** @defgroup EXAMPLES DA转换实验
 *  @{
 */
/** @name 文件名常量
 *  @{
 */
/** DA转换的寄存器定义,总线片选CS5,存储地址0x28000000,8位
\image html images\1.png
 */
#define DAC (*(volatile unsigned char *)0x28000000) 	
/** @}*/ // 文件名常量


/** 8位正弦波数组定义 */
const char SW[256]={0x80,0x83,0x86,0x89,0x8D,0x90,0x93,0x96,0x99,0x9C,0x9F,0xA2,0xA5,0xA8,0xAB,0xAE,
0xB1,0xB4,0xB7,0xBA,0xBC,0xBF,0xC2,0xC5,0xC7,0xCA,0xCC,0xCF,0xD1,0xD4,0xD6,0xD8,
0xDA,0xDD,0xDF,0xE1,0xE3,0xE5,0xE7,0xE9,0xEA,0xEC,0xEE,0xEF,0xF1,0xF2,0xF4,0xF5,
0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFD,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,0xFD,0xFD,0xFC,0xFB,0xFA,0xF9,0xF8,0xF7,0xF6,
0xF5,0xF4,0xF2,0xF1,0xEF,0xEE,0xEC,0xEA,0xE9,0xE7,0xE5,0xE3,0xE1,0xDE,0xDD,0xDA,
0xD8,0xD6,0xD4,0xD1,0xCF,0xCC,0xCA,0xC7,0xC5,0xC2,0xBF,0xBC,0xBA,0xB7,0xB4,0xB1,
0xAE,0xAB,0xA8,0xA5,0xA2,0x9F,0x9C,0x99,0x96,0x93,0x90,0x8D,0x89,0x86,0x83,0x80,
0x80,0x7C,0x79,0x78,0x72,0x6F,0x6C,0x69,0x66,0x63,0x60,0x5D,0x5A,0x57,0x55,0x51,
0x4E,0x4C,0x48,0x45,0x43,0x40,0x3D,0x3A,0x38,0x35,0x33,0x30,0x2E,0x2B,0x29,0x27,
0x25,0x22,0x20,0x1E,0x1C,0x1A,0x18,0x16,0x15,0x13,0x11,0x10,0x0E,0x0D,0x0B,0x0A,
0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x02,0x01,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x02,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,
0x0A,0x0B,0x0D,0x0E,0x10,0x11,0x13,0x15,0x16,0x18,0x1A,0x1C,0x1E,0x20,0x22,0x25,
0x27,0x29,0x2B,0x2E,0x30,0x33,0x35,0x38,0x3A,0x3D,0x40,0x43,0x45,0x48,0x4C,0x4E,
0x51,0x55,0x57,0x5A,0x5D,0x60,0x63,0x66,0x69,0x6C,0x6F,0x72,0x76,0x79,0x7C,0x80
};


/** @defgroup FileUtils 相关函数
 *  @{
 */
 
/** 主函数main \n
*  工程的主要函数,启动代码完成后就跳到此函数做相关工作。
*  工程中的主要流程工作,波型的选择。
*/
void main(void);
/** 延迟函数 
*  @param[in] time 延迟大小
*/
void delay(int time);
/** 产生方波信号函数 
*  @code
void Square(void)		//方波函数
{	
	
	while(1)			//循环运行
	{
		DAC = 0x0;		//向指定地址写入数据就能产生信号
		delay(64);		//延迟
		DAC = 0xff;		//写入高电平信号
		delay(64);		//延迟	
	}
	
}
*  @endcode
*/
void Square(void);
/** 产生正弦波信号函数 */
void Sinewave(void);
/** 产生梯形波信号函数 */
void Trapezia(void);
/** 产生三角波信号函数 */
void Triangle(void);







void main()
{
	ChangeClockDivider(1,1);            // 1:2:4
	ChangeMPllValue(0xa1,0x3,0x1);   
	  
	Port_Init();
	__vInitHaltHandlers();

    /*波形选择*/ 
    while(1)
    {
		//Square();
		Sinewave();
		//Trapezia();
		//Triangle();
	}

}


/* 方波 */
void Square(void)
{	
	
	while(1)
	{
		DAC = 0x0;
		delay(64);
		DAC = 0xff;
		delay(64);	
	}
	
}


/* 正弦波 */
void Sinewave(void)
{
	int i;
	while(1)
	{
		for(i = 0; i <= 255; i++)
		{			
			DAC = SW[i];
			delay(1);
		}
	}
	
}


/* 梯形波 */
void Trapezia(void)
{
	int i;
	while(1)
	{
		for(i = 60; i <= 255; i+=64)
		{
			DAC = i;
			delay(64);
		}
	}
	
}


/* 三角波 */
void Triangle(void)
{
	int i;
	while(1)
	{
			for(i = 0; i < 255; i+=3)
			{
				DAC = i;
				delay(1);
			}

			for(i = 255; i > 0; i-=3)
			{
				DAC = i;
				delay(1);
			}
	}
	
}


/*延迟*/
void delay(int time)
{	
	int i;
	for (; time > 0; time--)
		for( i=0; i<=0xff; i++);
}


/*!	\mainpage	DA转换实验
	\author		潘炀均
	\version 1.0
	\date    2006-9-1
	\n
	\n
	\n概要
	\n		此实验指数字信号转化为模拟信号,通过对固定的地址写入数据,能够产生电压,根据数据的变化,电压也变化,控制数据就能产生相关的波形。
	\n		旋极公司的DA转换模块精度为8位.范围为0~0xff.
	\n
	\n
	\n硬件连接图
	\image html images\2.png
	\n
	\n
	\n产生正弦波形图
	\image html images\3.png
	\n
	\n	
	\n问题与讨论
	\n		1.怎样通过编程产生一个锯齿波?

*/