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Discussion Groups | Analog Devices DSPs | 21065L DMA IOP registers

Technical discussions related to Analog Devices DSPs (including Blackfin, TigerSHARC, SHARC and ADSP-21xx DSPs).

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21065L DMA IOP registers - Andor Bariska - Oct 25 8:57:00 1999

Hi smart people, I sent below e-mail to the ADI hotline, and never got a return - can anybody help me? Regards, Andor > -----Ursprüngliche Nachricht----- > Von: Andor Bariska > Gesendet am: Mittwoch, 19. Mai 1999 12:16 > An: ADI DSP Support > Betreff: 21065L DMA IOP registers > > Hi, > > I use VisualDSP V4.01. Currently, I am programming an > application on the 21065L using DMA-based serial I/O for > SPORT1, utilizing both data channels A & B. > > The DMA is programmed by writing values to the according IOP > registers for each DMA channel - these constant IOP adresses > have been defined in the file "def21065L.h". > > There seems to be some inconsistency with the values defined > in that file, and the values given in the "ADSP 21065L SHARC > User's Manual", dated September 01 1998 (I downloaded this > PDF file from www.analog.com). Here are some examples: > > DMA CH6 (SPORT1 TX A) register definitions from "def21065L.h": > #define II6 0x40 > #define IM6 0x41 > #define C6 0x42 > #define CP6 0x43 > #define GP6 0x44 > #define EI6 0x45 > #define EM6 0x46 > #define EC6 0x47 > > However, the manual states: > Register Address Reset Value Group Description > IIT1A 0x0078 NI DA DMA chn 6 index (SPORT1 xmit A) > IMT1A 0x0079 NI DA DMA chn 6 modify > CT1A 0x007A NI DA DMA chn 6 count > CPT1A 0x007B NI DA DMA chn 6 chain pointer > GPT1A 0x007C NI DA DMA chn 6 general purpose > > In fact, most of the #define values do not coincide with the > manual. Also interesting is that in the "def21065L.h" file, > definitions are given for EI, EM and EC for DMA CH6, although > this is not an external port DMA but a serial port DMA > channel, and therefore should not have any EI, EM or EC > registers at all! > > Please advise on correct IOP register values for DMA CH2 > (SPORT1 Rx A), CH3 (SPORT1 Rx B), CH6 (SPORT1 Tx A CHAIN) and CH7 > (SPORT1 Tx B CHAIN). > > Thank you and kind regards, > Andor Bariska > WEISS ENGINEERING LTD. - Professional Digital Audio Products > Florastrasse 42 8610 Uster Switzerland > phone: +41 1 940 20 06, fax: +41 1 940 22 14 > mailto: web: http://www.weiss.ch > You *can* afford the best

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Re: 21065L DMA IOP registers - Michael Haertl - Oct 25 10:29:00 1999

Hello, On Mon, 25 Oct 1999, Andor Bariska wrote: > I sent below e-mail to the ADI hotline, and never got a return - can > anybody help me? > > -----Ursprüngliche Nachricht----- > > Von: Andor Bariska > > Gesendet am: Mittwoch, 19. Mai 1999 12:16 > > An: ADI DSP Support > > Betreff: 21065L DMA IOP registers > > > > Hi, > > > > I use VisualDSP V4.01. Currently, I am programming an > > application on the 21065L using DMA-based serial I/O for > > SPORT1, utilizing both data channels A & B. > > > > The DMA is programmed by writing values to the according IOP > > registers for each DMA channel - these constant IOP adresses > > have been defined in the file "def21065L.h". > > > > There seems to be some inconsistency with the values defined > > in that file, and the values given in the "ADSP 21065L SHARC > > User's Manual", dated September 01 1998 (I downloaded this > > PDF file from www.analog.com). Here are some examples: > > > > DMA CH6 (SPORT1 TX A) register definitions from "def21065L.h": > > #define II6 0x40 > > #define IM6 0x41 > > #define C6 0x42 > > #define CP6 0x43 > > #define GP6 0x44 > > #define EI6 0x45 > > #define EM6 0x46 > > #define EC6 0x47 as i see it, these values are for the 21060/61/62. > > However, the manual states: > > Register Address Reset Value Group > Description > > IIT1A 0x0078 NI DA DMA chn > > 6 index (SPORT1 xmit A) > > IMT1A 0x0079 NI DA DMA chn > > 6 modify > > CT1A 0x007A NI DA DMA chn 6 count > > CPT1A 0x007B NI DA DMA chn > > 6 chain pointer > > GPT1A 0x007C NI DA DMA chn > > 6 general purpose for the 21065, use these definitions instead (they are in the file def21065L.h a bit beneath the 'old' values). > > In fact, most of the #define values do not coincide with the > > manual. Also interesting is that in the "def21065L.h" file, > > definitions are given for EI, EM and EC for DMA CH6, although > > this is not an external port DMA but a serial port DMA > > channel, and therefore should not have any EI, EM or EC > > registers at all! on the 21060/61/62 DMA channel 6 serves link buffer4 or external port buffer 0. on the 21065L DMA channel6 serves sport1 a transmit. > > Please advise on correct IOP register values for DMA CH2 > > (SPORT1 Rx A), CH3 (SPORT1 Rx B), CH6 (SPORT1 Tx A CHAIN) and CH7 > > (SPORT1 Tx B CHAIN). see above. the assigment sport no. -- dma channel no. changed for the 21065L. so you have to use the 'new names' mentioned in def21065L.h. i didn't check it completely, but they should match with the manual. > > Thank you and kind regards, > > Andor Bariska hope i could help a bit. had the same problem at first. > > You *can* afford the best if only i could afford the EQ1-LP, then i finally could sell my behringer parametrics ;-) do you use the 21065L for your audio products ? Regards Michael -- Michael Haertl