topic Re: Remap pins to non-default behavior in LPC Microcontrollers

Remap pins to non-default behavior

lpcware — Wed, 15 Jun 2016 18:54:01 GMT

Content originally posted in LPCWare by AlexMSmithCA on Sun Jan 05 18:41:19 MST 2014
Eval Board: Keil MCB4357 (uses a LPC4357)

I am working on a project which has some overlap in pin usage when using any of the default pin functions. To get around this issue, I am trying to re-purpose some GPIOs for an I2S connection.

I am curious if there is a relatively seamless format for accomplishing this, such that the pin reading can be easily forwarded to the appropriate I2S registers? If not, where might you suggest I begin? Does Keil provide a pin-muxing utility tool?

Alternatively, is it feasible to have one pin switch off between controlling two separate functions? (e.g. I2S & act as a GPIO/other functionality)

Thanks in advance!

Re: Remap pins to non-default behavior

lpcware — Wed, 15 Jun 2016 18:54:01 GMT

Content originally posted in LPCWare by xianghuiwang on Sat Jan 11 11:04:52 MST 2014
Hi , Alex,
Have you tried the pinmux tool?
http://www.lpcware.com/content/nxpfile/lpc43xx-pin-mux-tool
Thanks!

Re: Remap pins to non-default behavior

lpcware — Wed, 15 Jun 2016 18:54:02 GMT

Content originally posted in LPCWare by AlexMSmithCA on Mon Jan 13 20:41:38 MST 2014
Thanks for the reply! I have looked at that. The problem is that there exist some conflicts that cannot be resolved by the pinmux tool, so I am hoping to use some SPGIOs as though they were the default I2S pins. Another use case might be having more than the allotted 2 I2S or another type of peripheral.