On Nov 8, 2:56 pm, Vladimir Vassilevsky <antispam_bo...@hotmail.com>
wrote:
> Do you have the flash output pulled up to +3.3V by resistor?
Not only is that a good question, I'd ask the same about the SPI lines
(CLK, CS, maybe even MOSI) driven by the blackfin. I've found they
don't seem to work without pullups, instead they will kind of hold the
last driven level for a while...
Reply by Vladimir Vassilevsky●November 8, 20072007-11-08
Explorer wrote:
> Hello!
> Does anybody succeeded in booting BF-532 using SPI AT45DB041B? We are
> experiencing problems.
>
> Description:
>
> I wrote a sample led blinking program using VisualDSP++ 3.5, and debug it
> using JTAG, it works well. Later, I selected a DSP loader file target and
> I've got an .ldr file. The options used was SPI INTEL HEX, default start
> address, no boot kernel. Then, I programmed it into the flash, using
> external programming device, and after manual blackfin reset, boot process
> is initiated, but not finished.
> When I used my oscilloscope a bit, I saw that Blackfin sends SCLK, #CS and
> data signals to flash, but the flash responds only a few cycles (3-4 bytes,
> I think). What the problem may it be?
> PS: I use blackfin as SPI master (BMODE=11)
Do you have the flash output pulled up to +3.3V by resistor?
Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com
Reply by Explorer●November 8, 20072007-11-08
Hello!
Does anybody succeeded in booting BF-532 using SPI AT45DB041B? We are
experiencing problems.
Description:
I wrote a sample led blinking program using VisualDSP++ 3.5, and debug it
using JTAG, it works well. Later, I selected a DSP loader file target and
I've got an .ldr file. The options used was SPI INTEL HEX, default start
address, no boot kernel. Then, I programmed it into the flash, using
external programming device, and after manual blackfin reset, boot process
is initiated, but not finished.
When I used my oscilloscope a bit, I saw that Blackfin sends SCLK, #CS and
data signals to flash, but the flash responds only a few cycles (3-4 bytes,
I think). What the problem may it be?
PS: I use blackfin as SPI master (BMODE=11)