谁有atmega8与tlc2543 的转换程序
OUT PC0
CS PC1
IN PC2
CLK PC3
菜鸟不懂,请高手指教!!!
------解决方案--------------------
#include <iom8v.h>
#include <macros.h>
#include <stdio.h>
#include <math.h>
void port_init(void);//端口初始化函数
void uart_init(void);//M8串口初始化函数
void init_devices(void);//整个设备初始化函数
void delay_1ms(void);//延时1ms程序
void delay(unsigned int n);//延时n毫秒程序
unsigned int p10x(unsigned int i);//自制10的N次方函数
void SPI_MasterInit(void);//SPI端口初始化函数
unsigned char SPI_TranByte(unsigned char );//SPI传送命令字以及接收转换结果的函数
void Format_tran(unsigned int data1,unsigned int data2);// 把转换结果从整型数转化为相应字 // 符串并从串口发到PC的函数
void main()
{
unsigned int addata = 0 ;//接收转换结果的变量
unsigned char adcl = 0 ;//转换结果高字节
unsigned char adch = 0 ;//转换结果低字节
unsigned char CtrlByte = 0;//定义控制字
OSCCAL = 0xA3;
init_devices();
UCSRA &= 0B00100000;
PORTB |=0B00000100;//片选禁止
PORTB &=0B11111011; //片选使能
delay_1ms();
while(1)
{ addata = 0 ;
adcl = 0 ;
adch = 0 ;
CtrlByte = 0B00001100;//选择外部模拟输入通道0,16位分辨率,高字节先进入
adch = SPI_TranByte(CtrlByte);
adcl = SPI_TranByte(CtrlByte);
addata |= adch;
addata <<= 8;
addata |= adcl ;
Format_tran(addata,0xffff);
CtrlByte = 0B00011100;//选择外部模拟输入通道1,16位分辨率,高字节先进入
adch = SPI_TranByte(CtrlByte);
adcl = SPI_TranByte(CtrlByte);
addata |= adch;
addata <<= 8;
addata |= adcl ;
Format_tran(addata,0xffff);
}
}
void port_init(void)
{
PORTB = 0xFF;
DDRB = 0x00;
PORTC = 0x00; //m103 output only
DDRC = 0x00;
PORTD = 0xFF;
DDRD = 0x00;
}
//UART0 initialisation
// desired baud rate: 9600
// actual: baud rate:9615 (0.2%)
// char size: 8 bit
// parity: Disabled
void uart_init(void)
{
UCSRB = 0x00; //disable while setting baud rate
UCSRA = 0x00;
UCSRC = 0x86;
UBRRL = 0x33; //set baud rate lo
UBRRH = 0x00; //set baud rate hi
UCSRB = 0x08;
}
void init_devices(void)
{
//stop errant interrupts until set up
CLI(); //disable all interrupts
port_init();
uart_init();
SPI_MasterInit();
MCUCR = 0x00;
GICR = 0x00;
TIMSK = 0x00; //timer interrupt sources
//SPI_MasterInit();
SEI(); //re-enable interrupts
//all peripherals are now initialised
}
void delay_1ms(void)
{unsigned int i;
for(i=1;i<(unsigned int)(8000000*143-2);i++)
;
}
void delay(unsigned int n)
{unsigned int i=0;
for(i=0;i<n;i++)
delay_1ms();
}
unsigned int p10x(unsigned int i)
{
unsigned int j=0;
unsigned int result=1;
for(j=0;j<i;j++)
result = result * 10;
return result;
}
void SPI_MasterInit(void)
{
DDRB = 0B11101111;
SPCR = 0x50;
}
unsigned char SPI_TranByte(unsigned char bData)
{unsigned char clear = 0;
SPDR = bData;
while(!(SPSR & 0x80));
clear = SPSR;
return SPDR;
}
void Format_tran(unsigned int data1,unsigned int data2)
{ int i=0;
unsigned char data[5] = "785j" ;
data1 =(unsigned int)(((unsigned long)((unsigned long)data1*5000))/data2);
for(i=0;i<4;i++)
{
data[i] = data1 / p10x(3-i);
data1 = data1 - (data1 / p10x(3-i)) * p10x(3-i);