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I2C hardware module issue

 
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delphy_boy



Joined: 15 Sep 2008
Posts: 8

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I2C hardware module issue
PostPosted: Mon Sep 15, 2008 4:29 am     Reply with quote
Hi,

Does anyone know why my program hangs when using the I2C harware functions on a PIC18F6722?

When I try to do an I2C start the program just hangs.

Here is the code
Code:

#use delay(clock=3684000)
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8,stream=GUI,errors)
#use i2c(master, sda=PIN_C4, scl=PIN_C3, stream=ONE, FORCE_HW)
#use i2c(master, sda=PIN_D5, scl=PIN_D6, stream=OTHER, FORCE_HW)

void initialise_ADC()
{
   i2c_start(ONE);//initiate a start condition
   output_low(PIN_C0);
   i2c_write(ADC_WRITE_ADDR);//send device write address
   i2c_write(ADC_SET_CONVERT);//set ADC configuration
   i2c_stop();//terminate comms
}
Ttelmah
Guest
PostPosted: Mon Sep 15, 2008 7:21 am     Reply with quote
If using streams, the write, and stop commands also need to use the stream identifier.
What happens if you just setup one port, and don't use stream identifiers at all?. Prove the hardware works.
Set the speed in the I2C setup as well.
What compiler version?.

Best Wishes
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