Hello there!
I have a working system (security keypad application) using MCF51QE128CLH MCU (64 pin) running with an 8MHz external crystal, needed for backwards compatibility with some legacy systems we still support. I could swap this and run it much faster for this new application, not a problem at all, but I don't think this is my current problem.
It used SPI2 for a Touchscreen device currently, SPI1 is not used and the pins are free on the MCU.
I wish to add a MicroSD Card to the PCB. The connections are pretty easy, and I added this to turn on the Pullup on MISO, as I read this pullup is needed to get the SD card started into SPI mode.
//Needed for SPI MISO to SD Card interface
setReg8Bits(PTEPE, 0x04); //turn on PTE2 Pullup ON
So far, so good.
After trying to figure out the Pex settings, adding SD_Card and an SPI controller Component, I found setting information here on:
https://mcuoneclipse.com/2014/05/26/tutorial-data-logger-with-the-frdm-k64f-board/
Due to the current 8MHz crystal on the PCB, I am using 125Khz for low speed and 2MHZ for high speed for the SPI to SD.
This article was very good, but it is for Kinetis but I am using CW10.6 and ColdfireV1 MCU, so much of the setting procedure is different with my CFv1 Pex Beans. I have spent enough time on this now that I have just been throwing combinations of settings at it, trying to get it to work, which clearly is not the best way!
Therefore, has anyone successfully added SD Card to a CFv1 MCU like my MCF51QE128 and can spell out the exact Pex settings for me, or knows of a clear step-by-step tutorial to implement this for my MCU and CW10.6 Pex beans? Erich's excellent K64F is not quite enough to get my understanding over the finish line.
Cheers!
<jeff>
