Re: [beagleboard] Re: Write to EEPROM on BBB?

Yes, there is. Wrong i2c diagram. Lack of STOP condition, for example. This will not prevent you from reading but writing will fail. On Friday, August 8, 2014 12:26:00 PM UTC+6, karlka...@gmail.com wrote: > > > Am Donnerstag, 7. August 2014 17:00:03 UTC+2 schrieb Gerald: >> >> Make sure you remov

Re: [beagleboard] Re: Write to EEPROM on BBB?

No, Make sure you are using 16b data. Gerald On Fri, Aug 8, 2014 at 1:26 AM, wrote: > > Am Donnerstag, 7. August 2014 17:00:03 UTC+2 schrieb Gerald: > >> Make sure you remove the write protect that is on the EEPROM >> > > Is there any other write-protection than the WP-pin of the chip that has

Re: [beagleboard] Re: Write to EEPROM on BBB?

Am Donnerstag, 7. August 2014 17:00:03 UTC+2 schrieb Gerald: > > Make sure you remove the write protect that is on the EEPROM > Is there any other write-protection than the WP-pin of the chip that has t obe pulled to LOW? -- For more options, visit http://beagleboard.org/discuss --- You rece

Re: [beagleboard] Re: Write to EEPROM on BBB?

Make sure you remove the write protect that is on the EEPROM and that you do not mess with what is there that is needed to make sure the board boots. Gerald On Thu, Aug 7, 2014 at 9:56 AM, wrote: > > > On Thursday, August 7, 2014 5:15:57 PM UTC+6, Karl Karpfen wrote: > >> OK, so that's my curr

Re: [beagleboard] Re: Write to EEPROM on BBB?

On Thursday, August 7, 2014 5:15:57 PM UTC+6, Karl Karpfen wrote: > > OK, so that's my current code, based on StarterWare example, writeEEPROM() > is called e.g. with addr=4 and length=4 plus some reasonable data: > > void writeEEPROM(unsigned int addr,unsigned int length,const unsigned char >

Re: [beagleboard] Re: Write to EEPROM on BBB?

On Wednesday, July 30, 2014 4:33:08 PM UTC+6, karlka...@gmail.com wrote: > > Am Mittwoch, 30. Juli 2014 11:14:05 UTC+2 schrieb lisarden: >> >> Write Protect pin is LOW-Active. This means that by grounding this pin >> you do memory protection >> >> > >

Re: [beagleboard] Re: Write to EEPROM on BBB?

Am Mittwoch, 30. Juli 2014 11:14:05 UTC+2 schrieb lisarden: > > Write Protect pin is LOW-Active. This means that by grounding this pin you > do memory protection > > Sure? EEPROM documentation says, write-protection is disabled when WP-input is pulled

Re: [beagleboard] Re: Write to EEPROM on BBB?

Write Protect pin is LOW-Active. This means that by grounding this pin you do memory protection 2014-07-30 9:34 GMT+04:00 : > > > So...anything else that could be missing? >> >> >> > Hi, > seems nothing is missed. In this case I'd proceed with an oscilloscope: > 1) ensure the WP (U7.5) is really

[beagleboard] Re: Write to EEPROM on BBB?

So...anything else that could be missing? > > > Hi, seems nothing is missed. In this case I'd proceed with an oscilloscope: 1) ensure the WP (U7.5) is really Low level. 2) look at the i2c diagram and ensure there is an acnowledge to (page) write operation 3) ensure there is long acnowledge delay