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SAMA5D3x datasheet lists SYSC_WPMR, not found in datasheet
We are having the same problem not finding the SYSC_WPMR register described in the SAMS70 and SAME70 datasheets.  Are there any resolutions on this?  
Friday, 30 June 2017 - 19:24
TWI problems with compiler optimization enabled
The PID values are different and unique: #define PDCA_CH_TWIM_TX 0 #define PDCA_CH_TWIM_RX 1I disabled the PDCA channels before configuring them....
Wednesday, 3 December 2014 - 21:34
TWI problems with compiler optimization enabled
Yes, the PDCA interrupt handler disables the transfer complete interrupt.  No, TERR flag in the TWI PDCA ISR register is not set, so no PDCA error.   I believe my...
Wednesday, 3 December 2014 - 19:08
TWI problems with compiler optimization enabled
I can get things working if I do the following each time I initiate a TWI PDCA transfer:   Disable the PDCA transfer complete interrupts (in red below). Fix an invalid...
Tuesday, 2 December 2014 - 23:06
TWI problems with compiler optimization enabled
I've tried all of the optimization levels.  Same behavior with any optimization.  I'll try to simplify my code and provide a snippet.
Tuesday, 2 December 2014 - 20:52
PDCA data wrap problem
Looks like at higher clock speed transfers the SPI 4 byte fifo is necessary as the PDCA cannot respond fast enough.  After I enabled the SPI MR.rxfifoen bit my problem...
Friday, 26 September 2014 - 23:36
PDCA data wrap problem
My problem now is that I periodically see a corrupt byte of data.  Most of the time a complete transfer of data is good.  When I do find a stray/corrupted byte, the rest...
Friday, 26 September 2014 - 22:45
PDCA data wrap problem
I found my problem.  I was enabling the PDCA Rx channel before the PDCA Tx channel.  If they are both enabled at the same time everything works great.     It...
Friday, 19 September 2014 - 22:16
PDCA data wrap problem
DukerX, I'm sure you're right about the problem being on my end and not a hardware feature.  Historically when I have a problem like this its because of something I'm doing...
Friday, 19 September 2014 - 16:42
PDCA data wrap problem
Thanks DukerX.     No, ring buffering is not on.  But, it kind of acts like it is enabled.  The strange thing is that the amount of wrapping changes based on...
Thursday, 18 September 2014 - 21:34
PDCA for TWI in AT32UC3A series
pixel2001n wrote:With the thought that examples are always better than explanations, I've attached some i2c DMA code of mine. I wouldn't recommend using the code directly, as it'...
Saturday, 28 May 2011 - 14:46