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boards:opi0 [2017/01/11 07:00] – [Pickle Microchip PIC ICSP] darronboards:opi0 [2020/08/05 04:53] (current) – [Pickle Microchip PIC ICSP] darron
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 It contains four ARMv7 CPU cores present in the AllWinner H2+ (cost reduced H3) system on a chip. It contains four ARMv7 CPU cores present in the AllWinner H2+ (cost reduced H3) system on a chip.
 +
 +A debian derived distribution of Linux called Armbian works on this device. It's important
 +to install this on a class 10 microsd card and not a class 4 which has incredibly poor
 +write performance. A sandisk ultra micro SDHC 10x works well.
 === GPIO === === GPIO ===
 The board has a [[boards:rpi|Raspberry Pi]] compatible GPIO header with 26 pins, an Orange Pi Zero specific header with 13 pins and a serial console at 9600 baud. The board has a [[boards:rpi|Raspberry Pi]] compatible GPIO header with 26 pins, an Orange Pi Zero specific header with 13 pins and a serial console at 9600 baud.
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 We can use the Orange Pi Zero GPIOs to program PICMicros using [[projects:pickle|Pickle Microchip PIC ICSP]]. We can use the Orange Pi Zero GPIOs to program PICMicros using [[projects:pickle|Pickle Microchip PIC ICSP]].
  
-At this time only the [[projects:gpio-bb|GPIO bit-bang driver for Linux]] may be utilised on the Orange Pi Zero.+The [[projects:gpio-bb|GPIO bit-bang driver for Linux]] may also be utilised on the Orange Pi Zero 
 +and uses the same numbering.
  
 == Low Voltage Programming with VPP at 3V3 == == Low Voltage Programming with VPP at 3V3 ==
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 The following connections refer to the GPIO header. Ensure that power is only ever applied from GPIO 3V3 on PIN 1 and never 5V. The following connections refer to the GPIO header. Ensure that power is only ever applied from GPIO 3V3 on PIN 1 and never 5V.
  
-Single common data I/O connection (GPIO bit-bang driver) without PGM.+Single common data I/O connection (OPI0 or GPIO bit-bang driver) without PGM.
 <code> <code>
  OPi0 H2+/H3                       PICMicro       GPIO header     .pickle  OPi0 H2+/H3                       PICMicro       GPIO header     .pickle
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 (R1) 10K !MCLR pull-up (R1) 10K !MCLR pull-up
 (R2..R4) 390R. (R2..R4) 390R.
 +
 +DEVICE=OPI0
 + or
 +DEVICE=GPIO-BB
 +IFACE=/dev/gpio-bb
 </code> </code>