编译器: winavr;
显示字符串:"I Love OurAvr!"
使用"Timer1 = 5Hz"来更新字符.
/*********************************************************
* Compiler Winavr:2005/5/4
* Target : M16
* Crystal: 4.0000Mhz
* Author:testcode
*
**********************************************************/
#include <avr/io.h>
#include <avr/signal.h>
#include <compat/ina90.h>
#include <avr/pgmspace.h>
#include <string.h>
#include <avr/delay.h>
//pa0-pa7 ----> je2.1 - je2.8
//pc0-pc7 ----> je1.8 - je1.1
#define LED_COL_PORT (PORTC)
#define LED_COL_DDR (DDRC)
#define LED_COL_PIN (PINC)
#define LED_ROW_PORT (PORTA)
#define LED_ROW_DDR (DDRA)
#define LED_ROW_PIN (PINA)
#define BUFFER_SIZE (25)
//Global Variable
unsigned char str = "I Love OurAvr!";
volatile unsigned char led_data_buffer; //characters in 5x7 format
volatile unsigned char led_buffer_ptr, led_display_ptr, str_ptr;
volatile unsigned char buff_OverFlow;
void port_init(void);
void timer1_init(void);
void init_devices(void);
void Display_Led(void);
void LoadDatatoBuffer(void);//Load 5x7 ASCII to buffer
//ASCII characters in a 5x7 dot format and offset: 32
//ie: ASCII'A' = 65, in the following table 'A' is: 65 - 32 = 33
const unsigned char led_str[ ] PROGMEM =
{
{ 0x00, 0x00, 0x00, 0x00, 0x00 },// sp
{ 0x00, 0x00, 0x2f, 0x00, 0x00 }, // !
{ 0x00, 0x07, 0x00, 0x07, 0x00 }, // "
{ 0x14, 0x7f, 0x14, 0x7f, 0x14 }, // #
{ 0x24, 0x2a, 0x7f, 0x2a, 0x12 }, // $
{ 0xc4, 0xc8, 0x10, 0x26, 0x46 }, // %
{ 0x36, 0x49, 0x55, 0x22, 0x50 }, // &
{ 0x00, 0x05, 0x03, 0x00, 0x00 }, // '
{ 0x00, 0x1c, 0x22, 0x41, 0x00 }, // (
{ 0x00, 0x41, 0x22, 0x1c, 0x00 }, // )
{ 0x14, 0x08, 0x3E, 0x08, 0x14 }, // *
{ 0x08, 0x08, 0x3E, 0x08, 0x08 }, // +
{ 0x00, 0x00, 0x50, 0x30, 0x00 }, // ,
{ 0x10, 0x10, 0x10, 0x10, 0x10 }, // -
{ 0x00, 0x60, 0x60, 0x00, 0x00 }, // .
{ 0x20, 0x10, 0x08, 0x04, 0x02 }, // /
{ 0x3E, 0x51, 0x49, 0x45, 0x3E }, // 0
{ 0x00, 0x42, 0x7F, 0x40, 0x00 }, // 1
{ 0x42, 0x61, 0x51, 0x49, 0x46 }, // 2
{ 0x21, 0x41, 0x45, 0x4B, 0x31 }, // 3
{ 0x18, 0x14, 0x12, 0x7F, 0x10 }, // 4
{ 0x27, 0x45, 0x45, 0x45, 0x39 }, // 5
{ 0x3C, 0x4A, 0x49, 0x49, 0x30 }, // 6
{ 0x01, 0x71, 0x09, 0x05, 0x03 }, // 7
{ 0x36, 0x49, 0x49, 0x49, 0x36 }, // 8
{ 0x06, 0x49, 0x49, 0x29, 0x1E }, // 9
{ 0x00, 0x36, 0x36, 0x00, 0x00 }, // :
{ 0x00, 0x56, 0x36, 0x00, 0x00 }, // ;
{ 0x08, 0x14, 0x22, 0x41, 0x00 }, // <
{ 0x14, 0x14, 0x14, 0x14, 0x14 }, // =
{ 0x00, 0x41, 0x22, 0x14, 0x08 }, // >
{ 0x02, 0x01, 0x51, 0x09, 0x06 }, // ?
{ 0x32, 0x49, 0x59, 0x51, 0x3E }, // @
{ 0x7E, 0x11, 0x11, 0x11, 0x7E }, // A
{ 0x7F, 0x49, 0x49, 0x49, 0x36 }, // B
{ 0x3E, 0x41, 0x41, 0x41, 0x22 }, // C
{ 0x7F, 0x41, 0x41, 0x22, 0x1C }, // D
{ 0x7F, 0x49, 0x49, 0x49, 0x41 }, // E
{ 0x7F, 0x09, 0x09, 0x09, 0x01 }, // F
{ 0x3E, 0x41, 0x49, 0x49, 0x7A }, // G
{ 0x7F, 0x08, 0x08, 0x08, 0x7F }, // H
{ 0x00, 0x41, 0x7F, 0x41, 0x00 }, // I
{ 0x20, 0x40, 0x41, 0x3F, 0x01 }, // J
{ 0x7F, 0x08, 0x14, 0x22, 0x41 }, // K
{ 0x7F, 0x40, 0x40, 0x40, 0x40 }, // L
{ 0x7F, 0x02, 0x0C, 0x02, 0x7F }, // M
{ 0x7F, 0x04, 0x08, 0x10, 0x7F }, // N
{ 0x3E, 0x41, 0x41, 0x41, 0x3E }, // O
{ 0x7F, 0x09, 0x09, 0x09, 0x06 }, // P
{ 0x3E, 0x41, 0x51, 0x21, 0x5E }, // Q
{ 0x7F, 0x09, 0x19, 0x29, 0x46 }, // R
{ 0x46, 0x49, 0x49, 0x49, 0x31 }, // S
{ 0x01, 0x01, 0x7F, 0x01, 0x01 }, // T
{ 0x3F, 0x40, 0x40, 0x40, 0x3F }, // U
{ 0x1F, 0x20, 0x40, 0x20, 0x1F }, // V
{ 0x3F, 0x40, 0x38, 0x40, 0x3F }, // W
{ 0x63, 0x14, 0x08, 0x14, 0x63 }, // X
{ 0x07, 0x08, 0x70, 0x08, 0x07 }, // Y
{ 0x61, 0x51, 0x49, 0x45, 0x43 }, // Z
{ 0x00, 0x7F, 0x41, 0x41, 0x00 }, // [
{ 0x55, 0x2A, 0x55, 0x2A, 0x55 }, // 55
{ 0x00, 0x41, 0x41, 0x7F, 0x00 }, // ]
{ 0x04, 0x02, 0x01, 0x02, 0x04 }, // ^
{ 0x40, 0x40, 0x40, 0x40, 0x40 }, // _
{ 0x00, 0x01, 0x02, 0x04, 0x00 }, // '
{ 0x20, 0x54, 0x54, 0x54, 0x78 }, // a
{ 0x7F, 0x48, 0x44, 0x44, 0x38 }, // b
{ 0x38, 0x44, 0x44, 0x44, 0x20 }, // c
{ 0x38, 0x44, 0x44, 0x48, 0x7F }, // d
{ 0x38, 0x54, 0x54, 0x54, 0x18 }, // e
{ 0x08, 0x7E, 0x09, 0x01, 0x02 }, // f
{ 0x0C, 0x52, 0x52, 0x52, 0x3E }, // g
{ 0x7F, 0x08, 0x04, 0x04, 0x78 }, // h
{ 0x00, 0x44, 0x7D, 0x40, 0x00 }, // i
{ 0x20, 0x40, 0x44, 0x3D, 0x00 }, // j
{ 0x7F, 0x10, 0x28, 0x44, 0x00 }, // k
{ 0x00, 0x41, 0x7F, 0x40, 0x00 }, // l
{ 0x7C, 0x04, 0x18, 0x04, 0x78 }, // m
{ 0x7C, 0x08, 0x04, 0x04, 0x78 }, // n
{ 0x38, 0x44, 0x44, 0x44, 0x38 }, // o
{ 0x7C, 0x14, 0x14, 0x14, 0x08 }, // p
{ 0x08, 0x14, 0x14, 0x18, 0x7C }, // q
{ 0x7C, 0x08, 0x04, 0x04, 0x08 }, // r
{ 0x48, 0x54, 0x54, 0x54, 0x20 }, // s
{ 0x04, 0x3F, 0x44, 0x40, 0x20 }, // t
{ 0x3C, 0x40, 0x40, 0x20, 0x7C }, // u
{ 0x1C, 0x20, 0x40, 0x20, 0x1C }, // v
{ 0x3C, 0x40, 0x30, 0x40, 0x3C }, // w
{ 0x44, 0x28, 0x10, 0x28, 0x44 }, // x
{ 0x0C, 0x50, 0x50, 0x50, 0x3C }, // y
{ 0x44, 0x64, 0x54, 0x4C, 0x44 } // z
};
int main(void)
{
init_devices();
buff_OverFlow = 0;
LoadDatatoBuffer();
LoadDatatoBuffer();
while(1)
{
Display_Led();
};
return 0;
}
void port_init(void)
{
//Set COL and ROW port as output and turn off leds
LED_COL_DDR = 0xFF;
LED_COL_PORT = 0xFF;
LED_ROW_DDR = 0xFF;
LED_ROW_PORT = 0xFF;
}
//call this routine to initialize all peripherals
void init_devices(void)
{
//stop errant interrupts until set up
_CLI(); //disable all interrupts
port_init();
timer1_init();
MCUCR = 0x00;
GICR= 0x00;
TIMSK = 0x04; //timer interrupt sources
_SEI(); //re-enable interrupts
//all peripherals are now initialized
}
//Display Characters
void Display_Led(void)
{
unsigned char temp;
for(unsigned char i = 0; i < 8; ++i)
{
LED_ROW_PORT = 0xFF; //Turn off LED Array
temp = led_display_ptr+i; //Load Led Display Data From Buffer
if( temp >= BUFFER_SIZE)
temp -= BUFFER_SIZE;
LED_COL_PORT = led_data_buffer;//
LED_ROW_PORT = ~(1<<(7-i));
//_delay_us(100);//加上这句，LED点阵会更加亮
}
}
//TIMER1 initialize - prescale:1024
// desired value: 5Hz
// actual value:5.002Hz (0.0%)
void timer1_init(void)
{
TCCR1B = 0x00; //stop
TCNT1H = 0xFC; //setup
TCNT1L = 0xF3;
OCR1AH = 0x03;
OCR1AL = 0x0D;
OCR1BH = 0x03;
OCR1BL = 0x0D;
ICR1H= 0x03;
ICR1L= 0x0D;
TCCR1A = 0x00;
TCCR1B = 0x05; //start Timer
}
//Updated display every 200mS;
SIGNAL(SIG_OVERFLOW1)
{
//TIMER1 has overflowed
TCNT1H = 0xFC; //reload counter high value
TCNT1L = 0xF3; //reload counter low value
//if the display point is bigger than data buffer size then display point = 0
if(++led_display_ptr >= BUFFER_SIZE)
{
led_display_ptr = 0;
buff_OverFlow = 0;
}
//Add one char to buffer, updated led_buffer_ptr
//Load Character from led_str table
if((!buff_OverFlow)&&((led_buffer_ptr-10)<=led_display_ptr))
{
LoadDatatoBuffer();
}
if((buff_OverFlow)&&((led_buffer_ptr + BUFFER_SIZE -10)<=led_display_ptr))
{
LoadDatatoBuffer();
}
}
//Convert the char: str into 5x7 format, store it to led_data_buffer
void LoadDatatoBuffer(void)
{
for(unsigned chari = 0; i < 5; ++i)
{
led_data_buffer = pgm_read_byte(&led_str[(str)-32]);//
if(led_buffer_ptr >= BUFFER_SIZE)
{
led_buffer_ptr = 0;
buff_OverFlow = 1;
}
}
if(++str_ptr >= strlen(str))
str_ptr = 0;
}
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-----此内容被testcode于2005-05-05,06:18:35编辑过
-----此内容被testcode于2005-05-10,04:56:17编辑过
-----此内容被testcode于2005-05-10,04:59:29编辑过
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