SHARC adsp-21479 SPI slave boosting

Hi Lee,

Apologies for the delay.

Please find the attached SPI slave booting code for ADSP-21479 processor. This code can be tested across two ADSP-21479 EZ-Kits, where one can be configured as host processor that sends the loader file and other can be act as slave that boots upon receiving the loader file from the Host. The interconnection is as follows.

Please make sure that you generate the LDR file format as 'include 32 bit'.

For more information, please refer the 'Slave boot mode' section (Page #: 915/1304) in the ADSP-214xx Hardware reference manual.
www.analog.com/.../ADSP-214xx_hwr_rev1.1.pdf

Also, I suggest you to refer the application note(EE-177) and its associate code example in the link given below.
www.analog.com/.../EE_177_SHARC_SPI_Slave.Booting.Rev.3.01.07.pdf
www.analog.com/.../EE-177.zip

Hope this helps.

SPI_Slave_Boot_ADSP21479.zip

7433.LED_Blink_ADSP21479_slaveBoot.zip
Regards,
Anand Selvaraj.

Hi, Anand.

     Thank you very much! It's really helped me a lot.  

     Now, I still have some questions : 

    1. In the slave mode, After the slave  receives 384 (32 bits)words from host  in DMA ,  Should I reconfigure the DMA parameters, becuase there are more words than 384 in ldr file.

    2. Is there slave receive example code. I need it badly.

Best Regards,

Lee.

Hi Lee,

Apologies for the delay.

1) No need to reconfigure the DMA parameters.In slave boot mode, the host processor initiates the booting operation by activating the SPICLK
signal and asserting the SPI_DS_I signal to the active low state. The 256-word kernel is loaded 32 bits at a time, through the
SPI receive shift register. To receive 256 instructions (48-bit words) properly, the SPI DMA initially loads a DMA count of 0x180
(384) 32-bit words, which is equivalent to 0x100 (256) 48-bit words.

Please refer ADSP-214xx Hrm page no:915 at below link.
www.analog.com/.../ADSP-214xx_hwr_rev1.1.pdf

Please refer the below links:
ez.analog.com/.../81160
ez.analog.com/.../239299

2) please refer the below link:
ez.analog.com/.../how-to-configure-adsp-21479-sharc-processor-in-spi-slave-mode

Regards,
Anand Selvaraj.