Hello,
I 'm using an EVM with DM3725 and would like to send data using UART and sDMA. I have some problem to send more than 64 bytes which corresponding to the size of the UART FIFO. I read the chapter 11.5 from the SPRUGN4R but it doesn't help me to resolve the problem.
1 ) I tried to program a software triggered tranfer :
synchro control = 0 in CCRi register
The sending fail if number of data > 64 : I have a sDMA interrupt with a Transaction Error event in the CSRi register.
The sending is OK when the number of data to send < 64 => I have the sDMA interrupt with a end frame event .
2 ) I tried to program a hardware triggered tranfer by configuring an LCH to transfer one element per DMA request (case of UART)
- sychro control = 0x35 in CCRi register (I'm using UART3)
-FS = 0, BS = 0 in CCRI register ,
The sending fail => Nothing happen , I have no sDMA interrupt for the transfert ?
I wonder in which register I have to write the number of element to send to my DMA ? CENi ? it is not indicated in the TRM in 11.5.3
Is it possible to have some code example ?
Thank you very much for your help.
regards.
Pat
