源：http://blog.163.com/zhaojun_xf/blog/static/30050580200951023046891
来自：
作者：龙图开发网
文章来源：龙图开发网
时间：2009-5-18 10:15:01
//LED调光－DMX512灯光协义接收控制 //龙图开发网 http://www.longtoo.com 原创，转载请注明出处 //ICC-AVR application builder : 2007/12/14 // Target : M8 // Crystal: 8.000Mhz #include <iom8v.h> #include <macros.h> #define uint unsigned int //16 bit #define uchar unsigned char //8 bit #define bit char // 1 bit #define ulong unsigned long //32 bit #define FLASH_LED_PORTC PORTC #define FLASH_LED_PORTD PORTD #define FLASH_LED_R_ON (1<<PC1) #define FLASH_LED_R_OFF (0<<PC1) #define FLASH_LED_G_ON (1<<PC2) #define FLASH_LED_G_OFF (0<<PC2) #define FLASH_LED_B_ON (1<<PC0) #define FLASH_LED_B_OFF (0<<PC0) #define DMX_control_receive (0<<PD2) #define DMX_control_send (1<<PD2) int JS_01; int JS_001=0,JS_002=0,JS_003=0; int CUR_BYTE_A=0,IADDRESS_A=1; char JS_1=0,JS_2=0,JS_3=0,JS_4=0,JS_5=0,JS_6=0; // RED GREEN BLUE RGB char DMX_DATA_1=0,DMX_DATA_2=0,DMX_DATA_3=0,DMX_DATA_4=0; char LED_TRANSFER_DATA[256]= { 50,50,50,50,50,50, 49,49,49,49,49,48,48,48,48,48, 47,47,47,47,47,46,46,46,46,46, 45,45,45,45,45,44,44,44,44,44, 43,43,43,43,43,42,42,42,42,42, 41,41,41,41,41,40,40,40,40,40, 39,39,39,39,39,38,38,38,38,38, 37,37,37,37,37,36,36,36,36,36, 35,35,35,35,35,34,34,34,34,34, 33,33,33,33,33,32,32,32,32,32, 31,31,31,31,31,30,30,30,30,30, 29,29,29,29,29,28,28,28,28,28, 27,27,27,27,27,26,26,26,26,26, 25,25,25,25,25,24,24,24,24,24, 23,23,23,23,23,22,22,22,22,22, 21,21,21,21,21,20,20,20,20,20, 19,19,19,19,19,18,18,18,18,18, 17,17,17,17,17,16,16,16,16,16, 15,15,15,15,15,14,14,14,14,14, 13,13,13,13,13,12,12,12,12,12, 11,11,11,11,11,10,10,10,10,10, 9,9,9,9,9,8,8,8,8,8, 7,7,7,7,7,6,6,6,6,6, 5,5,5,5,5,4,4,4,4,4, 3,3,3,3,3,2,2,2,2,2, 1,1,1,1,1,0,0,0,0,0 }; //------------------------------------------------ void port_init(void) { PORTB = 0xFF; DDRB = 0x00; PORTC = 0xFF; //m103 output only DDRC = 0xFF; PORTD = 0xFF; DDRD = 0xFF; } //TIMER0 initialisation - prescale:64 // WGM: Normal // desired value: 1mSec // actual value: 1.000mSec (0.0%) void timer0_init(void) { TCCR0 = 0x00; //stop TCNT0 = 0x83; //set count TCCR0 = 0x03; //start timer } #pragma interrupt_handler timer0_ovf_isr:10 void timer0_ovf_isr(void) { TCNT0 = 0x83; //reload counter value } //TIMER1 initialisation - prescale:8 // WGM: 0) Normal, TOP=0xFFFF // desired value: 100uSec // actual value: 100.000uSec (0.0%) void timer1_init(void) { TCCR1B = 0x00; //stop TCNT1H = 0xFF; //setup TCNT1L = 0x9C; OCR1AH = 0x00; OCR1AL = 0x64; OCR1BH = 0x00; OCR1BL = 0x64; ICR1H = 0x00; ICR1L = 0x64; TCCR1A = 0x00; TCCR1B = 0x02; //start Timer } #pragma interrupt_handler timer1_ovf_isr:9 void timer1_ovf_isr(void) { //TIMER1 has overflowed TCNT1H = 0xFF; //reload counter high value TCNT1L = 0x9C; //reload counter low value LED_RGB(); } //UART0 initialisation // desired baud rate: 250000 // actual: baud rate:250000 (0.0%) // char size: 8 bit // parity: Disabled void uart0_init(void) { UCSRB = 0x00; // RXEN //disable while setting baud rate UCSRA = 0x02; // RXC=0-- RXC TXC UDRE FE DOR PE U2X MPCM UCSRB = 0xFC; // 0XDF -- RXCIE TXCIE UDRIE RXEN TXEN UCSZ2 RXB8 TXB8 UCSRC = 0x06; // 9 bit-- URSEL UMSEL UPM1 UPM0 USBS UCSZ1 UCSZ0 UCPOL UBRRH = 0x00; // set baud rate hi UCSRC = 0x8E; // 9 bit 86 UBRRL = 0x03; //set baud rate lo ( 0x01 u2x=0) } #pragma interrupt_handler uart0_rx_isr:12 void uart0_rx_isr(void) { DMX_RECEIVE(); //uart has received a character in UDR } #pragma interrupt_handler uart0_udre_isr:13 void uart0_udre_isr(void) { //character transferred to shift register so UDR is now empty //FLASH_LED_PORTD=DMX_control_receive; //DMX_control_receive; //pd2=0 PD2 } #pragma interrupt_handler uart0_tx_isr:14 void uart0_tx_isr(void) { //character has been transmitted } //call this routine to initialise all peripherals void init_devices(void) { //stop errant interrupts until set up CLI(); //disable all interrupts port_init(); timer0_init(); timer1_init(); uart0_init(); MCUCR = 0x00; GICR = 0x00; TIMSK = 0x05; //timer interrupt sources SEI(); //re-enable interrupts //all peripherals are now initialised } void LED_FLASH() { ++JS_01; if (JS_01==500) { //FLASH_LED_PORTC^=FLASH_LED_R_OFF; //FLASH_LED_PORTC^=FLASH_LED_G_OFF; //FLASH_LED_PORTC^=FLASH_LED_B_OFF; } if (JS_01==1000) { JS_01&=0; } } void LED_RGB() //100us { //FLASH_LED_PORTC=FLASH_LED_R_ON|FLASH_LED_R_ON|FLASH_LED_R_ON; ++JS_1;++JS_2;++JS_3; if (JS_1==50) {JS_1=0;FLASH_LED_PORTC=FLASH_LED_R_OFF|FLASH_LED_G_OFF|FLASH_LED_B_OFF;} //ALL==0 if (JS_1==LED_TRANSFER_DATA[DMX_DATA_1]) {FLASH_LED_PORTC|=0x02;}//FLASH_LED_R_ON;} // on==1 if (JS_1==LED_TRANSFER_DATA[DMX_DATA_2]) {FLASH_LED_PORTC|=0x04;}//FLASH_LED_G_ON;} if (JS_1==LED_TRANSFER_DATA[DMX_DATA_3]) {FLASH_LED_PORTC|=0x01;}//FLASH_LED_B_ON;} if (JS_1==LED_TRANSFER_DATA[DMX_DATA_4]) {FLASH_LED_PORTC|=0x02;FLASH_LED_PORTC|=0x04;FLASH_LED_PORTC|=0x01; }//RGB } //***************************************** void DMX_RECEIVE() { unsigned char status, resh, resl; char DMX_ADDRESS_PAN,CODE_Data,DMX_DATA_PAN; while ( !(UCSRA & (1<<RXC)) ); // NO USE // from buffer status = UCSRA; resh = UCSRB; resl = UDR; resh = (resh >> 1) & 0x01; // TAKE RXB8 if (resh==1) //(1<<RXB8)) { //LED_DISPLAY_V4=15; //test ok DMX_DATA_PAN=1; if (CUR_BYTE_A==IADDRESS_A+0) DMX_DATA_1=resl; if (CUR_BYTE_A==IADDRESS_A+1) DMX_DATA_2=resl; if (CUR_BYTE_A==IADDRESS_A+2) DMX_DATA_3=resl; if (CUR_BYTE_A==IADDRESS_A+3) DMX_DATA_4=resl; if (DMX_ADDRESS_PAN==1) ++CUR_BYTE_A; //DMX address count register if (CUR_BYTE_A==513) CUR_BYTE_A&=0; } else //(0<<RXB8) { CODE_Data=resl; if (CODE_Data==0) { //test ok CUR_BYTE_A = 0; CODE_Data = 0xff; DMX_ADDRESS_PAN=1; } else DMX_ADDRESS_PAN=0; } // DMX_PORTD|=DMX_control_send; //pd6=1 } void main(void) { init_devices(); FLASH_LED_PORTD=DMX_control_receive; //DMX_control_receive; //pd2=0 PD2 //insert your functional code here... }