topic Re: Problem in lpc17xx_i2c.c in LPCXpresso IDE

Problem in lpc17xx_i2c.c

lpcware — Thu, 16 Jun 2016 01:26:24 GMT

Content originally posted in LPCWare by mfc on Sun Dec 05 02:56:55 MST 2010
I discovered a problem in the subject source code today -- I cannot find where to report it, so I'm putting it here in the hope that it might save someone some time. The problem it causes is that the i2c2 clock runs twice as fast as specified, which could make some devices unreliable.

Mike Cowlishaw

Details:

[FONT=Courier New]In lpc17xx_i2c.c the I2C_SetClock function has an error; in the case of I2Cx == LPC_I2C2, the line[/FONT]
[INDENT][FONT=Courier New] temp = CLKPWR_GetPCLK (CLKPWR_PCLKSEL_I2C1) / target_clock;[/FONT]
[/INDENT][FONT=Courier New]should be:[/FONT]
[INDENT][FONT=Courier New] temp = CLKPWR_GetPCLK (CLKPWR_PCLKSEL_I2C2) / target_clock;[/FONT]

[/INDENT]

Re: Problem in lpc17xx_i2c.c

lpcware — Thu, 16 Jun 2016 01:26:24 GMT

Content originally posted in LPCWare by NXP_USA on Mon Dec 06 11:28:46 MST 2010
Hi Mike,

That is a good catch. This change will be rolled into an upcoming LPC17xx example package release.

-NXP

Re: Problem in lpc17xx_i2c.c

lpcware — Thu, 16 Jun 2016 01:26:25 GMT

Content originally posted in LPCWare by mfc on Mon Dec 06 12:36:14 MST 2010

Quote: NXP_USA
Hi Mike,

That is a good catch. This change will be rolled into an upcoming LPC17xx example package release.

-NXP

It is an easy fix :-). Sounds good. Where is the right place to get the current updates, release, etc? It's hard to find (I have not found it yet!). And, ideally, a way to be notified of new updates.

Thanks -- Mike