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Address lines to MFP are reversed #7

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roscopeco opened this issue Mar 1, 2020 · 1 comment
Closed

Address lines to MFP are reversed #7

roscopeco opened this issue Mar 1, 2020 · 1 comment
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bug Something isn't working
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PCB Revision 1

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@roscopeco
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In the current schematic (and revision 0 board design) the address lines A1-A5 are incorrectly connected to MFP register select RS5-RS1 (I.e they are reversed).

This needs two fixes:

  • Correct the schematic
  • Implement a software fix for r0 boards

Correcting the schematic is self-evident.

The software fix will involve changing the register addresses in equates.S to reverse bits 1-5. This change will apply only to boards made from the current (pre-schematic-fix) design.
@roscopeco roscopeco added the bug Something isn't working label Mar 1, 2020
@roscopeco roscopeco added this to Accepted in PCB Revision 1 Mar 1, 2020
roscopeco added a commit that referenced this issue Mar 2, 2020
@roscopeco
Workaround #7
f0007c4
roscopeco added a commit that referenced this issue Mar 8, 2020
@roscopeco
Fix MFP registers for #7 workaround
a53214c
roscopeco added a commit that referenced this issue Mar 13, 2020
@roscopeco
Workaround #7
1ec1352
roscopeco added a commit that referenced this issue Mar 13, 2020
@roscopeco
Fix MFP registers for #7 workaround
e5df5fd
roscopeco added a commit that referenced this issue Mar 13, 2020
@roscopeco
Conditional compile for #7
801f546
PCB Revision 1 automation moved this from Accepted to Complete Mar 13, 2020
@roscopeco
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Software fix in place. Will raise new issue to cover schematic fix.

@roscopeco roscopeco mentioned this issue Mar 13, 2020
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roscopeco added a commit that referenced this issue May 25, 2020
@roscopeco
# This is a combination of 9 commits.
29bf9f6 
# This is the 1st commit message:

First cut SPI and SD libs|

# This is the commit message #2:

First steps reading FAT filesystem

# This is the commit message #3:

Additions and bugfixes

# This is the commit message #4:

Add FAT support

# This is the commit message #5:

Major speed and size improvements

# This is the commit message #6:

First cut working SD in ROM

# This is the commit message #7:

First cut working SD in ROM

# This is the commit message #8:

Make build automagical

# This is the commit message #9:

Remove ROMs from VC and ignore them
@roscopeco roscopeco mentioned this issue Sep 24, 2020
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@roscopeco