ADC.zip_atmega16 adc_色系ADChere

#include <iom16v.h> #include "g_define.h" // setup interrupt Vector #pragma interrupt_handler layanan_timer0_ovf:10 #pragma interrupt_handler layanan_uart_rxd:12 #define ID_KITA 200 /* Tanggal : 3 Agustus 2011 * Implementasi ADC * - Kirim data hasil akuisisi ke saluran komunikasi UART * - Akuisisi dan pengiriman di lakukan tiap detik * - PORT ADC yang dipakai adalah Channel - 1 (pin 39) */ //prototype fungsi void layanan_timer0_ovf(void); void layanan_uart_rxd(void); void inisialisasi(void); void serial_kirim(unsigned char data); unsigned char hitung_checksum(void); unsigned int akuisisi_adc(unsigned char ch); void konversi_2_Volt(unsigned int x); unsigned char counter_led; unsigned char buffer_serial[32]; unsigned char index_buffer; unsigned char ada_frame; unsigned char counter_idle; unsigned char lakukan_eksekusi; unsigned char counter_10ms; //------------------------------------------------------------------------------ void layanan_timer0_ovf(void) { unsigned int hasil_konversi; TCNT0=184; // 10ms, n = 256 - [(clock * time)/(prescaler)] if(counter_idle>0)counter_idle--; else{ ada_frame =0; } if(counter_10ms<99)counter_10ms++; else { counter_10ms = 0; hasil_konversi = akuisisi_adc(0x41);//pakai VRef = AVCC=5v, Channel = 1 serial_kirim(hasil_konversi/256); serial_kirim(hasil_konversi%256); serial_kirim('='); konversi_2_Volt(hasil_konversi); } } //--------------------------------- void layanan_uart_rxd(void) { unsigned char temp; unsigned char x; temp=UDR; counter_idle = 5; //check apakah start byte sebelumnya apakah sudah menerima frame if(ada_frame==0) { if(temp==0xfe){ //kosongkan buffer index_buffer=0; ada_frame=1; } } else{ buffer_serial[index_buffer]=temp; if(index_buffer<32)index_buffer++; //apakah isi buffernya sejumlah N (buffer_serial[0]) if(index_buffer==buffer_serial[0]){ //hitung checksum x = hitung_checksum(); if(x==TRUE){ //lakukan eksekusi dari frame yang diterima lakukan_eksekusi = TRUE; } } } } //------------------------------------------------------------------------------ void inisialisasi(void) { unsigned int Y; DDRA = 0xA0; DDRB = 0x00; DDRC = 0x94; DDRD = 0x00; PORTA = 0x00; PORTB = 0x00; PORTC = 0x00; PORTD = 0x00; // Setup/meng-enable-kan timer-0 overflow // timer0 setup overflow untuk 10ms TCCR0=0x05; //timer prescalar = 1024 TCNT0=184; //n = 256 - [(Clock * time)/Prescaler] TIMSK|=BIT(TOIE0); //enable timer0 overflow interrupts // Setup/meng-enable-kan UART // Konfigurasi 9600bps,Data 8bit,Parity None,Stop bit 1 (96008N1) /*enable UART receiver and transmitter */ Y=47; UBRRHI = Y/256; UBRRL = Y%256; UCSRA &= ~BIT(U2X); UCSRB = BIT(RXEN) | BIT(TXEN) | BIT(RXCIE); // receive pake interrupt UCSRC = BIT(URSEL) | BIT(UCSZ1) | BIT(UCSZ0); // setting pull-up di on-kan (enabled) SFIOR &= ~BIT(PUD); //pull-up enabled // Setting PD7 sebagai Output, PORT D yang lainnya sebagai input DDRD = 0x80; // Meng-enable-kan Interrupt SREG = 0x80; } //---------------------------------------- void serial_kirim(unsigned char data) { while (!(UCSRA & (1<<UDRE))); //wait until byte send UDR = data; // start transmittion } unsigned char hitung_checksum(void) { unsigned char i; unsigned char y; unsigned char chk_terkirim; unsigned char hasil; y=0; for(i=0; i<buffer_serial[0]-1; i++){ y = y + buffer_serial[i]; } //cek apakah ceksum yang terkirim sesuai dengan hasil hitungan chk_terkirim = buffer_serial[buffer_serial[0]-1]; if(y==buffer_serial[0]){ hasil = TRUE; } else{ hasil = FALSE; } return hasil; } void eksekusi_perintah(void) { if(lakukan_eksekusi==TRUE){ lakukan_eksekusi==FALSE; //cek apakah frame itu sesuai dengan ID kita if(buffer_serial[1]==ID_KITA){ //cek perintah yang diinginkan switch(buffer_serial[3]){ case 0x01: if(buffer_serial[4]==1){ PORTA = buffer_serial[5]; } if(buffer_serial[4]==2){ PORTB = buffer_serial[5]; } if(buffer_serial[4]==3){ PORTC = buffer_serial[5]; } if(buffer_serial[4]==4){ PORTD = buffer_serial[5]; } break; case 0x02: break; case 0x0A: break; } } } } //============================================================================== unsigned int akuisisi_adc(unsigned char ch) { unsigned int hasil; hasil = 0; ADCSRA = 0x86; ADMUX = ch; ADCSRA |= BIT(ADSC); while (ADCSRA&(1<<ADSC)){}; hasil = ADCL; hasil += (ADCH*256); ADCSRA = 0x00; return hasil; } //============================================================================== void konversi_2_Volt(unsigned int x) { float fVolt; unsigned int z, desimal; unsigned char y; fVolt = 0.0048828125 * x; fVolt = 1000*fVolt; //jadi miliVolt desimal = (unsigned int) fVolt; y = desimal/10000; //puluh ribuan y = y + 48; serial_kirim(y); z = desimal%10000; //ribuan y = z/1000; serial_kirim(y+48); z = z%1000; //ratusan y = z/100; serial_kirim(y+48); z = z%100; //puluhan y = z/10; serial_kirim(y+48); z = z%10; //satuan serial_kirim(y+48); serial_kirim(13); } //--------------------------------- void main(void) { inisialisasi(); while(1){ eksekusi_perintah(); } }