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Simple C code TWI/I2C   example for the BF537



		

			

									
					    haroldx
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on May 5, 2010 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi,
    
 
    is it possible that some one  could let me have  a copy of a simple working C example demonstrating an I2C/TWI  transaction, Master to slave using polling  if possible, since these are very early Blackfin  days for me. If have used I2C a lot in the past on other platforms (8051,AVR and FPGAs) and have reasonable understanding of it. But when it comes to it on the Blackfin (BF537)  all the how to details  are gobbledygook to me, so need a working C  example I can paw over. The best I have  managed so far is the sending of 2 bytes of data and the slave address to a  24C32 I2C eprom, when I set DCNT to  more than two I get nothing. My test setup for this type of  thing is a Logic analyzer connected to I2C eprom being targeted as a slave, with the logic analyzer interpreting the I2C  transaction, I am using a ADZS BF537 EZLITE board. No assembly language examples please at this time, because that is even more  gobbledygook to me. My aim is to get to the point where I can create an  I2C transaction  like: S -> serial byte sequence -> S serial byte sequence -> P, where  S and P  are Start and Stop respectively.
    
 
    Thanks in advance.
    
 
    Harold.