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级别:
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积分:59分 |
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注册:2008年07月29日
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用于增强板（带hc164）的8*8点阵的滚动显示i love you
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//ICC-AVR application builder : 2007-4-29 23:17:37
// Target : M16
// Crystal: 1.0000Mhz
#include <iom16v.h>
#include <macros.h>
unsigned char const DLY=10;
/*此表为字模*/
unsigned char const X_TAB[] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x82,0xFE,0x82,
0x00,0x00,0x00,0xFE,0x80,0x80,0x80,0x80,0x00,0x7C,0x82,0x82,0x82,0x7C,0x00,0x3E,0x40,
0x80,0x40,0x3E,0x00,0xFE,0x92,0x92,0x92,0x82,0x00,0x00,0x00,0x0E,0x10,0xE0,0x10,0x0E,
0x00,0x7C,0x82,0x82,0x82,0x7C,0x00,0x7E,0x80,0x80,0x80,0x7E,0x00,0x0C,0xBE,0x0C,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00};
void port_init(void)
{
PORTA = 0x00;
DDRA = 0xFF;
PORTB = 0x00;
DDRB = 0x00;
PORTC = 0x00; //m103 output only
DDRC = 0x00;
PORTD = 0x00;
DDRD = 0x00;
}
//call this routine to initialize all peripherals
void init_devices(void)
{
//stop errant interrupts until set up
CLI(); //disable all interrupts
port_init();
MCUCR = 0x00;
GICR = 0x00;
TIMSK = 0x00; //timer interrupt sources
SEI(); //re-enable interrupts
//all peripherals are now initialized
}
void delay(unsigned int dly)
{ unsigned int i;
for(; dly>0; dly--)
for(i=0; i<500; i++);
}
/*------------------------------------------------------------------------------------------------
NAME : SPI_MasterInit()
FUNCTION :初始化spi接口模式，MSTR=1,CPOL=1,CPHA=0,LSBF=0
--------------------------------------------------------------------------------------------------*/
void SPI_MasterInit(void)
{unsigned char temp;
DDRB=(1<<5)|(1<<7)|(1<<4); //初始化，mosi、sck输出?~~(ss)为高
SPCR=(1<<6)|(1<<4)|(1<<0)|(1<<1)|(1<<3); //
SPSR = 0x00;
temp = SPSR;
temp = SPDR; //清空SPI，和中断标志，使SPI空闲
}
/*-------------------------------------------------------------------------------------------------
NAME : msend_data()
FUNCTION :向SPI总线发送数据
-------------------------------------------------------------------------------------------------*/
void msend_data(unsigned char data)
{
SPDR = data;
while(!(SPDR&(1<<7))); //等待SPIF置位，即等待数据发送完毕
}
/*----------------------------------------------------------------------------------------------------------------
NAME : main()
FUNCTION :使用硬件SPI接口输出0－F的数据，控制LED显示。
---------------------------------------------------------------------------------------------------------------*/
void main(void)
{ unsigned char i=0,dly=DLY;
unsigned char fly=0;
init_devices();
SPI_MasterInit(); //初始化SPI接口
while(1)
{ while(dly)
{ dly--;
for(i=0; i<8; i++)
{
PORTA=~(X_TAB[i+fly]);
msend_data(BIT(i)); // 发送显示数据
delay(1);
}
}
fly>60?fly=0:fly++;dly=DLY;
}
}
ps:
连接方式：porta0~7接点阵r7~r0;portb5接A/B;portb7接CLK,MR接vcc.
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