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Re: a/d轉換問題
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資深會員
 
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先經過濾波電路再進AD如何?
發表於: 2009/9/29 9:19
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a/d轉換問題
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新會員
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各位先進好...
小弟最近使用CCS編譯器來寫C程式燒入18F452 以下是程式部份.. 但在 AD轉換使用時卻發現電壓讀取時有雜訊?? 雜訊約在0.XXV 請問該如何解決呢?? 謝謝 歐.... void main() { long i=0; float vol; float data; float a; float b; set_tris_c(0x9E); // RC5 for D/O, debugging set_tris_a( 0b11101111 ); setup_adc_ports(RA0_RA1_RA3_ANALOG); setup_adc(ADC_CLOCK_DIV_32); set_tris_b(0); while(1) { i=i+1; set_adc_channel(0); delay_us(50); b=read_adc(); //c=(float)(A*5.09)/1024; set_adc_channel(1); delay_us(50); data=read_adc(); delay_ms(250); output_low ( PIN_A4 ); delay_ms(250); output_high ( PIN_A4 );
發表於: 2009/9/29 1:42
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