Other Parts Discussed in Thread: TMS320F28335, CONTROLSUITE
Hello,
I'm using a TMS320F28335 and could not get DMA working!
It seems to me that all the necessary steps have been done.
Interrupts disabled
Peripheral clocks --> initialized
PW1 SOC on A group --> initialized
DMA CH1 Addresses --> initialized
DMA CH1 Burst Config. --> initialized
DMA CH1 Transfer Config. --> initialized
DMA CH1 Wrap Config. --> initialized
DMA CH1 Mode Config --> initialized
DMA CH1 --> Started
Interrupts Enabled
I just tried to copy the 32-bit register EQep1Regs.QPOSCNT to the 32-bit RAM variable HWQEP_u32Encoder1_QPOSCNT.
My DMA init. sequence:
HARDRESET = 1;
NOP;
BURST_SIZE = 0;
SRC_BURST_STEP = 0;
DST_BURST_STEP = 0;
SRC_WRAP_SIZE = 0xFFFF;
SRC_WRAP_STEP = 0;
DST_WRAP_SIZE = 0xFFFF;
DST_WRAP_STEP = 0;
PERINTSEL = 18;
PERINTE = 1;
ONESHOT = 0;
CONTINUOUS = 1;
SYNCE = 0;
SYNCSEL = 0;
OVRINTE = 0;
DATASIZE = 1;
CHINTMODE = 0;
CHINTE = 0;
RUN = 1;
My tests using a JTAG emulator show that the copy is not performed. What did I do wrong????
Any help would be really appreciated (I'm spending much more time than expected).
