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I²C flowcode ad5241

 
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ciss_c



Joined: 28 Nov 2010
Posts: 1
Location: Belgium

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I²C flowcode ad5241
PostPosted: Sun Nov 28, 2010 6:51 am     Reply with quote

I am trying to program my digital potentiometer ad5241 with flowcodeV4 but I can't get it to work. my SDA and SCL are each connected to 10K resistor.
This is my program.

MI2C_init

MI2C_start

MI2C_Transmit_Byte 0b01011110 (this is my adress byte for the AD 5241 the first 5 MSB byte are the adress the 2 next are AD1 and AD0 they must be 1 caus they are connected to VDD and the last bit is READ or WRITE so i made it 0 to write)

MI2C_Transmit_Byte 0b00000000 (instruction_Byte wich i do not use , i sellect RDAC1 to use register 1 for a single potentiometer.)

MI2C_Transmit_Byte 0b11111111 (this is the data byte ,it sets the resister value to full scale)

MI2C_stop
____________________________________
MI2C_start

MI2C_Transmit_Byte ( ADRESS AD5241)

MI2C_Transmit_Byte (INSTRUCTION)

MI2C_start (repeated start)

MI2C_Transmit_Byte (ADRESS BYTE in READ so 0b01011111)

and then i read from RDAC1
MI2C_Receive
(RETOUR value is 0b1111111 and LAST(Byte) is 0)

MI2C_stop


This is my program and I don't know whats wrong. I hope you can help me, thanks.
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sun Nov 28, 2010 11:56 am     Reply with quote

This forum is for CCS C. Your language has its own forum, here:
http://www.matrixmultimedia.com/support/viewforum.php?f=22
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