Help on using DMA to access External memory interface (LPC) of MPC5125

visakhanc — Thu, 06 Feb 2014 06:14:26 GMT

Hi,

I have a requirement to access the memory on an FPGA interfaced to the external bus(LPC) of MPC5125 processor. The memory access has a high data rate, so a DMA access is required. The driver for LPC interface and DMA driver are not available with MQX RTOS. 3.8 (last version for MPC5125). How to start with developing a driver for using the LPC interface together with DMA?

Thanks for help in advance

Visakhan

Re: Help on using DMA to access External memory interface (LPC) of MPC5125

RadekS — Wed, 12 Feb 2014 10:59:10 GMT

You are right. Unfortunately there isn’t any LPC driver for MQX. So, you have to write your own or you can pay for that.

In first case I would like to recommend one of our older application note AN3902 How to Develop I/O Drivers for MQX:

http://www.freescale.com/files/32bit/doc/app_note/AN3902.pdf

MQX Software Solutions中的主题 Help on using DMA to access External memory interface (LPC) of MPC5125

Help on using DMA to access External memory interface (LPC) of MPC5125

Re: Help on using DMA to access External memory interface (LPC) of MPC5125