Raspberry fixes #42
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Raspberry fixes #42
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Copied from wiringpi/wiringpi.c of git://git.drogon.net/wiringPi/:
This is undocumented and really only intended for the GPIO command.
Use at your own risk!
Seems there are some boards with 0000 in them (mistake in manufacture)
So the distinction between boards that I can see is:
0000 - Error
0001 - Not used
Original Pi boards:
0002 - Model B, Rev 1, 256MB, Egoman
0003 - Model B, Rev 1.1, 256MB, Egoman, Fuses/D14 removed.
Newer Pi's with remapped GPIO:
0004 - Model B, Rev 2, 256MB, Sony
0005 - Model B, Rev 2, 256MB, Qisda
0006 - Model B, Rev 2, 256MB, Egoman
0007 - Model A, Rev 2, 256MB, Egoman
0008 - Model A, Rev 2, 256MB, Sony
0009 - Model A, Rev 2, 256MB, Qisda
000d - Model B, Rev 2, 512MB, Egoman (Red Pi, Blue Pi?)
000e - Model B, Rev 2, 512MB, Sony
000f - Model B, Rev 2, 512MB, Qisda
0010 - Model B+, Rev 1.2, 512MB, Sony
0011 - Pi CM, Rev 1.2, 512MB, Sony
0012 - Model A+ Rev 1.2, 256MB, Sony
0014 - Pi CM, Rev 1.1, 512MB, Sony (Actual Revision might be different)
0015 - Model A+ Rev 1.1, 256MB, Sony
A small thorn is the olde style overvolting - that will add in
1000000
The Pi compute module has an revision of 0011 or 0014 - since we only
check the last digit, then it's 1, therefore it'll default to not 2 or
3 for a Rev 1, so will appear as a Rev 2. This is fine for the most part, but
we'll properly detect the Compute Module later and adjust accordingly.
And then things changed with the introduction of the v2...
For Pi v2 and subsequent models - e.g. the Zero:
[USER:8] [NEW:1] [MEMSIZE:3] [MANUFACTURER:4] [PROCESSOR:4] [TYPE:8] [REV:4]
NEW 23: will be 1 for the new scheme, 0 for the old scheme
MEMSIZE 20: 0=256M 1=512M 2=1G
MANUFACTURER 16: 0=SONY 1=EGOMAN 2=EMBEST
PROCESSOR 12: 0=2835 1=2836
TYPE 04: 0=A 1=B 2=A+ 3=B+ 4=Pi2 B 5=ALPHA 6=CM, 8=Pi3 B
REV 00: 0=REV0 1=REV1 2=REV2
- follow wiringPi's naming convention for constants: GPPUD - simplify "if ... then .. else ..." to ternary expression
No need to explicitly clear the GPIO values before setting them to the values wanted.
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The attached patch series contains fixes for hd44780's ConnectionType raspberrypi.
Everything tested with Pi B, Pi2, P3 as well as single-controller (16x2, 20x4) and multi-controller-displays (27x4)