you might find this interesting http://www.kronosrobotics.com/pj_logicprobe/logicprobe.htm it's a build it yourself logic probe, that might be done with a pic, (I don't even know what a logic probe is used for but...) ----- Original Message ----- From: "Lennart Sundberg" To: Sent: Wednesday, January 22, 2003 3:16 PM Subject: Re: [PIC]: I2C debugging > Yes a logic analyzer would be great, I found John Andrews code on the > PICList Project page where he uses a 17C756, maybe I can convert it to > the 16F877 and use it as a Serial Ascii to I2C interface. > I also found a parallelport-I2C interface from Ingo Gerlach at > http://home.welfen-netz.de/IngoGerlach/i2c_par/i2c_par.htm it is made > out of three simple chips and also gives an 8 channel logic analyzer on > the screen. It seems to be very useful, but unfortunately the page is > not in English. > /Lennart > > > > -----Original Message----- > From: pic microcontroller discussion list > [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Herbert Graf > Sent: den 22 januari 2003 04:03 > To: PICLIST@MITVMA.MIT.EDU > Subject: Re: [PIC]: I2C debugging > > Personally I found a logic analyzer was all I needed to debug my I2C > problems. TTYL > > -----Original Message----- > From: pic microcontroller discussion list > [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Jon M (Mike) Jones > Sent: January 21, 2003 18:05 > To: PICLIST@MITVMA.MIT.EDU > Subject: Re: [PIC]: I2C debugging > > > I faced the same problem a year or two ago. My solution was to connect > the > 16F877 to a 'know' good slave such as a DS1307 clock chip and started > debugging from there. > > Mike Jones > pmjones3@attbi.com > ----- Original Message ----- > From: "Lennart Sundberg" > To: > Sent: Tuesday, January 21, 2003 1:24 PM > Subject: [PIC]: I2C debugging > > > Hi > I have implemented an I2C routine in a 16F877 for communication to > another board with a PIC. But how do I know if my I2C routine is working > correct before I build up the other board. How can I do this? > I have looked around on the web and found a lot of I2C test equipment > but I don't want to pay a lot of money for some extra hw, that may be of > little use for me in the future. > Could you recommend a low cost debugger or how to test the I2C. > > -- > http://www.piclist.com hint: To leave the PICList > mailto:piclist-unsubscribe-request@mitvma.mit.edu > > -- > http://www.piclist.com hint: To leave the PICList > mailto:piclist-unsubscribe-request@mitvma.mit.edu > > -- > http://www.piclist.com hint: To leave the PICList > mailto:piclist-unsubscribe-request@mitvma.mit.edu > > -- > http://www.piclist.com hint: PICList Posts must start with ONE topic: > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > > -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads