Sign in
Search adsp
Subscribe to adsp
adsp by Keywords
AD1819 | AD7332 | ADSP-2106 | ADSP-21060 | ADSP-21065L | ADSP-2116 | ADSP-21160M | ADSP-2181 | ADSP-218x | ADSP-219 | ADSP-2199 | ADSP219 | BF531 | BF532 | BF533 | BF535 | Blackfin | FFT | JTAG | LDF | SDRAM | SHARC | SPORT | UART | VDSP++ | VisualDSP
Discussion Groups
Discussion Groups | Analog Devices DSPs | Writing external Flash
Technical discussions related to Analog Devices DSPs (including Blackfin, TigerSHARC, SHARC and ADSP-21xx DSPs).
Writing external Flash - madhavigb - Aug 3 12:46:00 2004
|
Hello I have problem in writing Atmel external flash (512 x8) using external port of adsp2191. I am able to read flash contents but not able to write. My EMI settings are as follows: EMI_SET_WR: IOPG = External_Memory_Interface_Page ; AX0 = 0x0070; IO(EMICTL) = AX0; ax0 =0x0DFF; io(BMSCTL) = ax0; IOPG = External_Access_Bridge_Page ; ax0 = 0x0004 ; //for dm data format IO(E_STAT) = AX0; Thanks in advance. Madhavi |
|
|
(You need to be a member of adsp -- send a blank email to adsp-subscribe@yahoogroups.com )
Re: Writing external Flash - Jaime Andres Aranguren Cardona - Aug 4 15:28:00 2004
|
Hi, Which part are you using for Flash memory? JaaC --- madhavigb <> wrote: > Hello > I have problem in writing Atmel external flash > (512 x8) using > external port of adsp2191. > I am able to read flash contents but not able to > write. > > My EMI settings are as follows: > EMI_SET_WR: > IOPG = External_Memory_Interface_Page ; > AX0 = 0x0070; > IO(EMICTL) = AX0; > > ax0 =0x0DFF; > io(BMSCTL) = ax0; > > IOPG = External_Access_Bridge_Page ; > ax0 = 0x0004 ; //for dm data format > IO(E_STAT) = AX0; > > Thanks in advance. > Madhavi > > _____________________________________ > /groups.php3 > > Yahoo! Groups Links ===== Jaime Andrés Aranguren Cardona __________________________________ |
|
|
(You need to be a member of adsp -- send a blank email to adsp-subscribe@yahoogroups.com )
Re: Writing external Flash - madhavi b - Aug 5 8:04:00 2004
|
Hi, Boot memory space of ADSP2191 is used for flash memory AT29c040A [data(0-7) and Addrress(0-18) lines , BMS as chip select,] On my card, I want to write to boot memory space ( Flash AT29c040A) at rumtime. To access adress 0x00000 of flash memory, I am accessing on ADSP2191 as DMPG1 = 0x08; I1 = 0x0000; m2=0;.. i.e, mapping of flash addresses starts at 0x80000 on adsp For Programming Atmel, I have to write sequence of code to ADSP.. 1) to load data 0xAAH into address 05555H corresponding my code is.. DMPG1 = 0x08; I1 = 0x2AAA; M1 = 0; L1 =0; //DATA 0xAA00 INTO ADDRSS 05555 AR = 0XAA00; DM(I1,M1) =AR; 2)to load data 0x55H into address 0x2AAA DMPG1 = 0x08; //FWR_ADDR2== 0x1555 = 2AAA/2; on flash address is 0x2AAA = divide by 2 on adsp is 1555 I2 = 0x1555; M2 = 0; L2 =0; //DATA 0x5500 INTO ADDRSS 02AAA AR = 0X0055; DM(I2,M2) =AR 3) load data 0xa0 into 0x05555 for this I am loading 0xA000 at DM(I1,m1). 4) load sector. 256 bytes i am writing to DM. 5) pause write cycle time(10ms). (here i am pausing for 10ms /more.. i think for waiting more than 10ms should not affect..?) Processor adsp2191 has 160 MHz core and 80 MHz peripheral clock. Now I am not getting where problem is actually, whether it is 1) Memory interface timing..?..(latent cycles of external memory..) 2) not able to address correctly..? [ but using same addressing technique , i am able to read from flash.. so i think there should not be problem..] Thanking you in advance. Madhavi --- Jaime Andres Aranguren Cardona <> wrote: > Hi, > > Which part are you using for Flash memory? > > JaaC > --- madhavigb <> wrote: > > > Hello > > I have problem in writing Atmel external flash > > (512 x8) using > > external port of adsp2191. > > I am able to read flash contents but not able to > > write. > > > > My EMI settings are as follows: > > EMI_SET_WR: > > IOPG = External_Memory_Interface_Page ; > > AX0 = 0x0070; > > IO(EMICTL) = AX0; > > > > ax0 =0x0DFF; > > io(BMSCTL) = ax0; > > > > IOPG = External_Access_Bridge_Page ; > > ax0 = 0x0004 ; //for dm data format > > IO(E_STAT) = AX0; > > > > > > > > Thanks in advance. > > Madhavi > > > > > > > > > ===== > > Jaime Andrés Aranguren Cardona __________________________________ |
(You need to be a member of adsp -- send a blank email to adsp-subscribe@yahoogroups.com )