I had interfaced the LPC812(Slave) to LPC4357(Master) microcontroller through SSP interface.
The SSP at LPC4357 is controlled through DMA. The configurations at LPC4357 are as follows,
SSP :
Frame length : 8-bit,
Communication : SPI, Master
Mode : 1 (CPOL : 0, CPH : 1)
DMA:
Rx & Tx channels
Source & destination burst sizes : 1 byte
Source & destination data widths : 1 byte,
Rx channel : (Channel 0)
Mode : Peripheral to memory
Data flow control : DMA control
Terminal Count interrupt : enabled
Tx channel : (Channel 1)
Mode : Memory to peripheral
Data flow control : DMA control
Terminal Count interrupt : disabled
When I performed data transfers , it is working for few transfers well as I expected. But some times, I never got the TC interrupt, when go through debugging, I found that, the ROR flag in Raw interrupt status if SSP is getting high & Tx channel of DMA completed its transfer but the Rx channel of DMA not at completed its transfer ever... So, I am not getting the TC interrupt from Rx channel of DMA. This occurring very frequently...
Please help me on this...Its very.. very.. urgent...
Thanks in advance...
