I am new to ARM Cortex 4 and to ADSP-CM403F. I worked with AVR stuff and was able using SD cards with SPI, AVR-GCC. I am working on a schematic for the 120pin ADSP-CM403F chip. To be able to code for MicroSD I will have to connect the right pins of the card to the CPU. Unfortunately I did not find an example yet to see if its possible using 4 data lines as SDIO offers. In the data sheet Rev. A november 2015 there are signals like SPI clock, SPI data 2, SPI data 3. I cannot see SPI data 0 or data 1.
Can anybody please give me a hint where to find an example how to add a MicroSD card (and also a QSPI flash, SRAM) to this chip including a simple C example code? Thank you very much !
You've posted in the GNU Toolchain forum, but you seem to be asking hardware questions?
For chip specific question, you need to go to the Chip manufacturer - they have nothing to do with ARM.
https://www.analog.com/en/products/adsp-cm403f.html
That's also the most likely place to find specific examples.
For the distinction between what ARM does, and what chip manufacturers do, see:
https://community.arm.com/developer/tools-software/tools/f/keil-forum/43684/lpc2148-timer0-not-working-as-expected/158950#158950
Thank you Andy. Yes - I have posted in the code section because I need some example code for that. For the example code to work the hardware wiring must be set up correctly. So I would need an example for both - software and hardware. Should I ask in another forum for that?I had been at https://www.analog.com/en/products/adsp-cm403f.html and had a look at the documentation they are giving. There is a description of EVAL-CM40X-EZLITE, but unfortunately they are not using and showing a microSD with this. There does not seem to be an Application Note for this."you need to go to the Chip manufacturer - they have nothing to do with ARM."they seem to use an ARM core. Is this not the core where the SPI pins are connected to?Thank you for the link. I will have a look at.
Matt007 said:Is this not the core where the SPI pins are connected to?
No.
See the post I linked: the "core" is just the CPU itself; the SPI, SDIO, QSPI, etc are all the chip manufacturer's own IP - so you need to speak to them for details.
The diagram on the AD Product Page makes it clear:
Only the block marked 'ARM' is the ARM part.
See the section, "ARM CORTEX-M4 CORE" in the datasheet;
See also section 2, "ARM Cortex-M4 Core Memory Sub-System" in the Hardware Reference manual.
Note that it is the Hardware Reference manual which contains the detailed operating descriptions of the peripherals - including the Register descriptions.
I had a look at the files that AD is giving related to this chip. Unfortunately I did not find until now all that I need to make a final decision about the hardware connections of the MicroSD card to the ADSP chip. Without a schematic I cannot start making a PCB. Without PCB I cannot test any software writing to registers.
You said: "Note that it is the Hardware Reference manual which contains the detailed operating descriptions of the peripherals - including the Register descriptions."If ARM only delivers the M4 Core and not the peripherals - then the peripherals are from somebody else made. So I have to use the register descriptions from ADI here? Is this correct? I cannot use Cortex M4 descriptions for that? Did I understand this correctly?
That's what Development Kits are for!
Never go straight to a PCB without first having got up to speed, and proved your concepts, on a Dev Kit.
The ADI document describes the ADI IP.
You will see that there is very little about the M4 Core in the ADI documents - because that documentation is provided by ARM.
http://infocenter.arm.com/help/topic/com.arm.doc.subset.cortexm.m4/index.html#cortexm4
For an excellent reference on the M4 Core, I suggest that you get a copy of Joseph Yiu's Definitive Guide:
https://www.elsevier.com/books/the-definitive-guide-to-arm-cortex-m3-and-cortex-m4-processors/yiu/978-0-12-408082-9
See also:
http://www.keil.com/books/
http://www2.keil.com/mdk5/learn
"I suggest that you get a copy of Joseph Yiu's Definitive Guide"thank you for this hint !
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