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> > > Please, who can help me to program a PCF8574. What is wrong in the program given below. > I think there is someting wrong because by pressing the switch P3 the stepper does not turn, as I have in mind. This is part of your program from your original posting: #loop 'reading ON/OFF of P3 gosub start datenW=65 gosub I2C_write gosub I2C_read gosub Noack gosub Stop if datenR=&B00001111 then gosub motor else goto loop goto loop Which value does datenR have, when P3 is not pressed? Which value does datenR have, when P3 is pressed? Bye Achim |
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