BlockoS

I’d like to change the pin connection assignments on the Arduino, but I’m having a little trouble doing so. I tried reassigning the pin definitions in at45db161d.h to what I needed, but that didn’t work.

Is there something I’m missing?

- Mike

Btw, The work you made public on this chip has been so helpful to me, and I’m sure many, many others.

Thanks a lot!

SPI is implemented in hardware. And unfortunately, you can’t use pins other than pins 10 to 13. But you can reassign the pins for RESET and WP. Or completely ignore them as they are unused at the moment.

Vincent

Hi,
Thank you for nice library.
I’m using your library for my Arduino RSS reader project. I use AT45DB161D flash memory to store Kanji (Japanese) font data. The followings are feedback from my experience;

1) ATD45DB161D::ComparePageToBuffer()
Bit 6 of status register (COMPARE) is set to 0 in case data in the main memory page matches the data in the buffer.
Thus, to ComparePageToBuffer function retrun to 1 on compare success, I modified the code as follows;

/* Wait for the end of the comparaison and get the result */
while(!((status = ReadStatusRegister()) & READY_BUSY))
{}

if ( status & COMPARE )
return 0; /* If (COMPARE bit = 1) then Error */
else
return 1;

2) ATD45DB161D::EndAndWait()
If ATD45DB161D is coexist with other SPI device such as Ethernet Shield, SS (Slave Select) pin should be driven High (SS inactive) after the device access. To ensure SS high, I added the following code;

void ATD45DB161D::EndAndWait()
{
DF_CS_inactive; /* End current operation */
DF_CS_active; /* Some internal operation may occur
* (buffer to page transfer, page erase, etc… ) */

/* Wait for the chip to be ready */
while(!(ReadStatusRegister() & READY_BUSY))
{}
DF_CS_inactive; /* Release SPI Bus */ <== Add this code
}

EndAndWait() is called every time after read/write access to ATD45DB161D like this;

dataflash.ContinuousArrayRead(dfAddress[0], dfAddress[1], 1);
for (i = 0; i < dataLength; i++)
fontBuf[i] = spi_transfer(0xff);
dataflash.EndAndWait();

The codes is great.

But I found a little bug
Please check a function named ContinuousArrayRead.

http://www.atmel.com/dyn/resources/prod_documents/doc3500.pdf
AT45DB161D_CONTINUOUS_READ_HIGH_FREQ(Opcode:0×0B) has a additional don’t care byte.
Please add “if (!low) { spi_transfer(0×00); }” to end of the function.

Thanks.
Shin.

I am working on an Arduino project that will have two SPI peripherals, DataFlash and an LCD. Clearly, I need to use different chip select pins for the two peripherals, i.e., they can’t both be Arduino pin 10. Finally, I seem to have found a solution using the AT45DB161D library on this website with a minor modification. Pin 10 is dedicated to informing the Arduino SPI subsystem that it is the master, by making pin 10 an output and setting it high. Then I am able to use other available digital pins as the chip select for DataFlash.