Re: how to initialize the DMA register in C code? | TMS320C54x

Technical discussions about the TI C54x DSPs (including the c5401, c5402, c5402a, c5404, c5407, c5409, c5409a, c5410, c5410a, c5416, c5420, c5421, c5441, c549, c5470 and c5471).

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you can use macro 

Void DMA_RSET (REG, Uint16 regval)
>  
>
>    
>  Jane,  
>  
>You need to change the address of DMSA to be 0x55. The current  
>address (0x56) is actually the DMSDI (Subbank Access Register with  
>Autoincrement). Any access you make to this will cause the address  
>to increment by 1 and will access the DMA register (which is causing  
>the behavior you see).  
>  
>-Robert  
>  
>--- In c54x@y..., Jane Shen <janes@t...> wrote:  
>> Hi,all,  
>>  
>> When I declared:  
>>  
>> volatile unsigned int *DMSA=(volatile unsigned int *)0x56;  
>> volatile unsigned int *DMDSN=(volatile unsigned int *)0x57;  
>>  
>> and later:  
>> *DMSA=0x19; /*point to SRC5*/  
>> *DMDSN=0x1111; /*assign 0x1111 to SRC5*/  
>>  
>> It turns out that my DST5 is changed to 0x19 and CTR5 changed to  
>0x1111.  
>> When I re-run it, the CTR5 changed to 0x19 and SFC5 changed to  
>0x1111.  
>> Can I initialize the DMA registers in C code, I mean not using the  
>> embedded asm code in C? Anyone has the experience of this? Would you  
>> please help?  
>>  
>> Your kind help will be very much appreciated.  
>>  
>>  
>> Best,  
>>  
>>  
>> Jane SHEN  
>> Tri-Link Technologies Inc.  
>> #301-8988, Fraserton Court  
>> Burnaby, BC V5J 5H8  
>> Tel: (604) 451-9113  
>> Fax: (604) 451-9118  
>> Email: janes@t...  
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Discussion Groups | TMS320C54x | Re: how to initialize the DMA register in C code?

Re: how to initialize the DMA register in C code? - zhit...@mail.ru - Mar 13 12:38:41 2007