Have an urgent need for adapter for at91sam7a3 with case style LQFP-100 (25x25,
0.5mm pitch) but got prototype PCB:s with foot print QFP-100 (20x30, 0.65mm
pitch). The reason is that I chose the wrong foot print in my CAD library for
the latest prototype.

An alternative might be if you have any component dummy with SMD feet in the
pattern of QFP-100 (20x30, 0.65mm pitch) and we'll design the adapter ourselves.

Very grateful for your assistance.

Hello all,

I have just upgraded my hardware from Rev B to Rev C chips of AT91SAM7S128. But
i am facing a strange problem when try to download and debug code through IAR
Embedded Workbench for ARM with J-Link Jtag device from segger. Same project
with same download settings programming the Rev B chips but not the  REV C.
However Rev C chips are being programmed correctly using J-Flash utility and
then can be debug as well. But IAR is unable to program the Rev C chip some how
and not writing to ROM/Flash any thing. I wonder if any one have experience such
an issue before and now the exact reason to solve the problem. It will be really
helpful if some one can share the appropriate information.

Regards... Dani:(

Hi everyone,
             I need help to read analog data from load cell. And how i can handle
it in C.

Regards

MZR

Don't try this yourself. From the way you pose this question, It appears you do
not have a clue how to start this.
I reckon you would be better of hiring someone who could do this for you.
  If you persist, go to Atmel's website, load the datasheet of the device you'r
interested in and look up :"ADC" or "Analog to Digital Converter".

Ewout

--- In AT91SAM@yahoogroups.com, "Zee" <mzahid_rasheed@...> wrote:
>
> Hi everyone,
>             I need help to read analog data from load cell. And how i can
handle it in C.
>
> Regards
>
> MZR
>

Hello All,

I am attempting to write a simple adc polling function (the atmel examples use
interrupts which I don't want to use), and it's not working. Here's essentially
what I am doing

<code>
uint32 adc_get_data(uint32 channel)
{
       uint32 data;
       ADC_EnableChannel(AT91C_BASE_ADC, channel);
       ADC_StartConversion(AT91C_BASE_ADC);
       while((adc->ADC_SR & (1 << channel)) != (1 << channel)); // wait for conv
to finish

       data = ADC_GetConvertedData(AT91C_BASE_ADC, channel);
       ADC_DisableChannel(AT91C_BASE_ADC, channel);
       return data;
}

int main()
{
       /** all inits and configs **/
       while(TRUE)
       {
             data = adc_get_data(ADC_CHANNEL_5);
             printf("%d\n\r", data);      // serial dbgu port configured
       }
}

</code>

However, on the serial port, I'm reading all zeros. what am I doing wrong?

I appreciate your help!

>>The link you sent is using TLV320AIC23B audio codec, but I am looking
>>for a controller(may be ARM or other) which has audio codec embedded
>>in controller itselt, like we have usb stack in AT91SAM7S256.

>>Regards,
>>Ravi Gupta

Ravi,

The audio codec stated is an "audio" codecs with word lengths of 16, 20, 24, and
32 bits.

The DACs in any of the 32-bit micros out there have 10-bits DACs.

Not the best for high fidelity.

Please check any 32-bit processor available and you will find none with what you
are looking for.

So, an external codec will be required.

don

PS: If sound quality is not the goal of your project, then any 10-bit DAC will
do.

I am taking the plunge to learn how to program/use ARM processors.  I am looking
for a decent low cost/free developemtn environment for use on windows
preferably, but I can use linux if that is a better way.

Thanks,

Lou

Hi,

Look at

Codesourcery for the toolchain
Openocd and gdb for the debugging
Ecplise with the GNUARM plugin for the IDE

With this you should be setup for Free to code for any arm !

Jonathan
AT91SAM@yahoogroups.com wrote:
> I am taking the plunge to learn how to program/use ARM processors.  I
> am looking for a decent low cost/free developemtn environment for use
> on windows preferably, but I can use linux if that is a better way.
>
> Thanks,
>
> Lou
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

Hey Lou,

Check the vendor website for the board you are targeting for fee cross development toolchains.  There are also loads of free linux dev environments you can run in a vm.

we are developing a USB mass storage device with AT91SAM3U4C controller.we want
to implement a Composite device with two mass storages and later we want to
change one MSD to custom mass storage(vendor).we have tried with two LUNS and it
is working fine.when we try as composite device it is not working.what steps we
need to follow to implement USB composite device with two MSD's.

Hi folks,

I'm having a problem with a microSD (used in FAT16 SD instruction mode [not
SPI]). I'm using AT91SAM7x256 with NutOS. It reads and writes fine. The problem
occur when my device experience power trip. When it start-up again, system flag
that my miroSD isn't found. I need to reset the device for 2 or 3 times then
system able to find the SD.
The problem is most likely because I never unmount the microSD before shutting
down. I need to do multiple repetitive operations with the SD, so I don't
unmount and remount every time.
Is there any trick to refresh the SD like by asserting certain signal to the SD?
Where can I find real step by step operation to SD? As in what signal sent to
initialize, mount, etc.
Thanks people. Appreciate your help.

Chris

hi every one ............
i have a big promblem in intrrupt ... each intrrupt that i actived it , occured
one time .... and for the second time it goes to pendding mode ...... pls help
me .............

void timer0_init (void)
{
  unsigned int div;
  unsigned int tcclks;
  unsigned int MCLK_F = 48000000;
  unsigned int Disr_F = 1;

  PMC_EnablePeripheral(AT91C_ID_TC0);
  IRQ_ConfigureIT(AT91C_ID_TC0, AT91C_AIC_PRIOR_HIGHEST |
AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL, (void (*)(void))ISR_Tc0);
  IRQ_EnableIT(AT91C_ID_TC0);

  TC_FindMckDivisor(Disr_F,MCLK_F, &div, &tcclks);
  TC_Configure(AT91C_BASE_TC0,tcclks| AT91C_TC_CPCTRG);
  AT91C_BASE_TC0->TC_RC  = (MCLK_F / div) / Disr_F;
  AT91C_BASE_TC0->TC_IER = AT91C_TC_CPCS;
  TC_Start(AT91C_BASE_TC0);
}

void ISR_Tc0 (void)
{
  unsigned int dummy;
  dummy = AT91C_BASE_TC0->TC_SR;
  dummy = dummy;
  kk++;
  j = ~j;
  if(!j)PIO_Set(&GPIO_porta0);
  else PIO_Clear(&GPIO_porta0);

  AT91C_BASE_AIC->AIC_ICCR = 0x1 << AT91C_ID_TC0;
  AT91C_BASE_AIC->AIC_EOICR = 0;
}

Dear All

We have design our on board using AT45DB645 SPI dataflash.When I download the
Ronboot.bin file to the RAM is sucessfully reads the FLASH id as indicated here

ATMEL LOADER VER 1.01 May 03 2004 14:54:39
*--------------------------------------*
DataFlash:AT45DB642
Nb pages:   8192
Page Size:   1056
Size= 8650752 bytes
Logical address: 0xC0000000
*--------------------------------------*
1: Download Dataflash [addr]
2: Read Dataflash [addr]
3: Start U-BOOT [C0008000 => 21F00000]
*--------------------------------------*
1 c0000000
CCCC

Write 11776 bytes in DataFlash [0xc0000000]
Verify Dataflash: Failed


Can anyone tell what is this issue?

I have done it, Now I need to get some digital sequence on extension ports
according to analog signal level and the digital sequence i need  4bit only


--- In AT91SAM@yahoogroups.com, "Ewout" <ewout@...> wrote:
>
>
> Don't try this yourself. From the way you pose this question, It appears you
do not have a clue how to start this.
> I reckon you would be better of hiring someone who could do this for you.
>  If you persist, go to Atmel's website, load the datasheet of the device you'r
interested in and look up :"ADC" or "Analog to Digital Converter".
>
> Ewout
>
> --- In AT91SAM@yahoogroups.com, "Zee" <mzahid_rasheed@> wrote:
> >
> > Hi everyone,
> >             I need help to read analog data from load cell. And how i can
handle it in C.
> >
> > Regards
> >
> > MZR
> >
>