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Re: Read VR1 with the analog voltage input and convert the voltage
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初級會員
 
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1.可以舉例a/d 轉ascii 嗎
2.CBLOCK 0x00.......這行意思是什麼呢... C_Hold_Delay ; variable used for the sample hold charge time TxD_Flag ; 500mS time flag, Send TxD data to Terminal Hex_Temp ENDC......使用巨集嗎? 不知去那查 請版主教一下 謝謝!! 
發表於: 2006/4/27 20:42
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Re: Read VR1 with the analog voltage input and convert the voltage
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版主
 
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AD轉換後的結果有10個bit，分成 2bit + 4bit + 4bit的方式轉成 ASCII Code 方式來顯示，SWAPF 只是將兩個4-bit相互對換而已。
發表於: 2006/4/27 18:36
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Read VR1 with the analog voltage input and convert the voltage
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初級會員
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Conver A/D <b9:b8> to ASCII\\????
movf ADRESH,W andlw b'00000011' call Hex_ASCII call Tx_a_Byte Conver A/D <b7:b4> to ASCII????? swapf ADRESL,W.......為什麼用swapf 乘h'0F' andlw h'0F' call Hex_ASCII call Tx_a_Byte movf ADRESL,W .....Conver A/D <b3:b0> andlw h'0F' call Hex_ASCII call Tx_a_Byte 這是W400課程裡EX4範例.....看不明白所以想請問大家謝謝
發表於: 2006/4/27 2:36
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