RTOS/AM5716: Unable to write EDMA_TPCC registers

Rong Wang2

Part Number: AM5716

Tool/software: TI-RTOS

Hi ,

I am trying to configure EDMA on AM5716, but I was unable to write configuration data to any of EDMA_TPCC register. here are part of my test code:

#define EDMA_3CC_IECR *( unsigned int* )( 0x43302058 )
#define EDMA_3CC_EECR *( unsigned int* )( 0x4330202C )
#define EDMA_3CC_EESR *( unsigned int* )( 0x43302030 )
#define EDMA_3CC_EESRH *( unsigned int* )( 0x43302034 )
#define EDMA_3CC_ICR *( unsigned int* )( 0x43302070 )
#define EDMA_3CC_IPR *( unsigned int* )( 0x43302068 )
#define EDMA_3CC_ECR *( unsigned int* )( 0x43302008 )
#define EDMA_3CC_IESR *( unsigned int* )( 0x43302060 )
#define EDMA_3CC_DRAEM_0 *( unsigned int* )( 0x43300340)
#define EDMA_3CC_DRAEM_1 *( unsigned int* )( 0x43300348 )

// enable shadow region 1 for channel 1, TCC#0, TCC#1

EDMA_3CC_DRAEM_0= 0x0003;

EDMA_3CC_IESR = 0x0003;

EDMA_3CC_EESR =0x0003;

etc...

but I found by emulator that it did not change. I had verified that EDMA_3CC_DRAEM_0= 0X0003, and also EDMA_TPCC_MPPAN_0 = 0xFEEF( have access to region 0 registers). I also changed the register address to globle address, but I was still unable to write any data into the those registers.

Is there anything else I need to do before? did I miss anything?

thanks for your help!

Ron

over 6 years ago

0 Biser Gatchev-XID over 6 years ago

TI__Guru**** 393215 points

The RTOS team have been notified. They will respond here.

0 lding over 6 years ago in reply to Biser Gatchev-XID

TI__Guru* 95265 points

Hi,

You may need to look at the datasheet whether those registers readable? Those registers like enable transfer, check interrupt pending, clear interrupt, etc... You can write to them but you can't read them back.

Regards, Eric

0 Rong Wang2 over 6 years ago in reply to lding

Expert 1420 points

Hi Eric,

Thanks for your reply.

I can wirte and readback EDMA_TPCC_OPT_n at address 0x43304000 + (0x20 * n) for Instance SYS_EDMA_TPCC, but not at address 0x40D14000 + (0x20 * n) for Instance DSP1_EDMA_TPCC. I had read some reference but I did not see any limitation to write and read those registers. I used the same function but just with different base address. I also tried to wirte some to DSP_EDMA_TPCC from CCS memory view(by emulator), but no success. It seems the no access to DSP1_EDMA_TPCC regsiter.

Thanks,

Ron

0 lding over 6 years ago in reply to Rong Wang2

TI__Guru* 95265 points

Hi,

I am not sure from which master you want to access the DSP1_EDMA_TPCC. The address is different, you may look at below links:
e2e.ti.com/.../2109146
e2e.ti.com/.../553514

Regards, Eric

0 lding over 6 years ago in reply to lding

TI__Guru* 95265 points

Was this issue resolved? Thanks!

Regards, Eric

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RTOS/AM5716: Unable to write EDMA_TPCC registers