A project log for Redphone
The Redphone project is an open source mobile phone
Last night I've done NAND ctrl util.
In Quartus 18.0 i generated empty project with simple top level:
After synthesis I made an RPD file (raw data program)
(btw, u can do that using console as well)
#!/bin/bash Q=/opt/intelFPGA/18.0/quartus/bin/quartus_cpf IN=test OUT=bit ${Q} -d EPCS16 -c ${IN}.sof ${OUT}.pof ${Q} -d EPCS16 -s EP4CE22 -c ${OUT}.pof -c ${OUT}.rpd
...and flashed it into the boot NAND.
But after the synthesis and NAND flashing nothing happened... I saw only a square wave on the nSTATUS pin. Altera in manuals mention that FPGA can restart configuration sequence if an error occurs.I checked all the connection, pcb and schematics and after that decided to recover an original EPCS16 on my W25Q64 SPI NAND flash.
After programming the situation repeated.Then I connected USB-blaster and wrote firmware in boot NAND from Quartus.
And FPGA booting went fine (test signal was ok and nCONFIG_DONE was pulled up)! I'm reading NAND and... all the bytes turn out to be mirrored! FAIL)
I added byte mirroring in the code and now everithing works well
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