Ross Thompson
d11136c406
Fixed bug with the external memory region selection.
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Updated bios program to copy just 127MB to dram.
2021-10-19 11:23:23 -05:00
Ross Thompson
b3694bfdfd
Fixed boot loader program to start at correct address.
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modified script which converts the ram.txt into preload text file for sdc simulation.
created script to convert ram.txt into binary to write to flash card.
added top level for solo sd card fpga.
2021-10-11 17:22:23 -05:00
Ross Thompson
7d749b201b
added support to due partial fpga simulation.
2021-09-26 15:00:00 -05:00
Ross Thompson
3a9bc1e8c1
Updated the fpga bios code to emulate the same behavior as qemu's bootloader and it also copies
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the flash card to dram.
Fixed latch issue in the sd card reader.
2021-09-26 13:22:23 -05:00
Ross Thompson
a213ecbdb2
GPIO marker to indicate the sdc to dram transfer complete.
2021-09-25 19:29:15 -05:00
Ross Thompson
c917f14b6b
Almost done writting driver for flash card reader.
2021-09-25 19:05:07 -05:00
Ross Thompson
69674f272a
We now have a rough sdc read routine.
2021-09-25 17:51:38 -05:00
Ross Thompson
23425c8d71
Write of the SDC address register is correct. The command register is not yet working.
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The root problem is the command register needs to be reset at the end of the SDC transaction.
2021-09-24 18:48:11 -05:00
Ross Thompson
86524a5f64
Now have software interacting with the initialization and settting the address register.
2021-09-24 18:30:26 -05:00
Ross Thompson
44196af61a
Have program which checks for sdc init and issues read, but read done is
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not correctly being read back by the software. The error is in how the
sdc indicates busy.
2021-09-24 15:53:38 -05:00
