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Hello, I'd like to ask a little bit help. I downloaded the mcb517_i2c aplication note. I try to read the LM75 tempereture sensor with the bit_bang i2c routines. The problem is... There is a 16 bit temperature register and I can read only the high byte . I use the following program . . unsigned char data_in; i2c_start(); i2c_write(0x91); data_in=i2c_read(); i2c_stop(); I try to use the unsigned int instead unsigned char and modified the i2c_read routin to read 16 bit but no succes. Any advice? Cheer George
I looked at the documentation for the device. You have to implement a read I2C with ack function, followed by a read I2C without ack function, then a Stop function to read this part correctly. If that does not work, can you post the I2C functions code (i.e. what makes up the I2C_read, stop, etc) so we can take a look. Please review the Tips for posting Messages before posting code.
Hello, Thanks for the help. Yes,you're right. The problem was the missing ack. Because the master didn't send the ack beetween two readings the slave always sent the first byte instead of second. Thank again George