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| Micro Controllers Discuss all aspects of micro controllers - building them, coding them, etc. All controllers are welcome - PIC, BASIC, Z8 Encore!, etc. |
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24th January 2005, 06:37 PM
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 89s51 magnitude code Hey guys wassup. i need with wiriting a code for comaring two 8 bit numbers in the 89s51 controller. basically there will be a value in the code already set. then through one of the port there will be a 8 bit value consitant coming for a adc. i was to compare that value to the value in the code and i want to know if it is < > or = to the value in the program. can anyone help?  :idea: thx | |
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25th January 2005, 02:59 PM
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| help pls  | |
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27th January 2005, 02:06 PM
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| Here is how you do it. Code: ; ACC Countains data from Port 1 and is compared to value 45H MOV A, P1 CJNE A,#45H,NOT_EQ ; ... .... ; A = 45H. SJMP COMPARE_END NOT_EQ: JC SMALLER ; IF A < 45H. ; ... .... ; A > 45H. SJMP COMPARE_END SMALLER: ; ... .... ; A < 45H. COMPARE_END:
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