|
Hello, I am having some troubles with using EDMA to transfer data from a 4 channel adc. The adc requires a control byte to be sent which specifies which channel the next conversion is to be. I want to get 4 channels of data so I set up a edma transfer to copy the 4 control bytes to the mcbsp continuously. I also have another 2 edma channels set up for ping pong buffering the output of the adc. The problem is that the channel data is getting mixed up. I am sending a control byte buffer which corresponds to ch0,ch1,ch2,ch3 but my output is being filled in ch4,ch0,ch1,ch2. I can fix this by changing my control byte buffer to ch3,ch0,ch1,ch2 and the data come out in the proper 0,1,2,3 order but this seems kludgy. Is there some way to fix this so the input buffer channels correspond with the output. -Ron |
Channel synchronization problems with mcbsp & edma
Started by ●June 18, 2003
