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boards:opi0 [2017/01/11 06:52]
darron [GPIO] 		boards:opi0 [2020/08/05 04:53] (current)
darron [Pickle Microchip PIC ICSP]
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 The Orange Pi Zero is a Linux compatible computer with high speed GPIO. The Orange Pi Zero is a Linux compatible computer with high speed GPIO.
  
 +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 Pi0 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.
  
-Whilst the GPIO is compatible with the RPi notice the orientation.+Whilst the GPIO header is compatible with the RPi the orientation is different.
  
 <code> <code>
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 </code> </code>
  
-This is the relationship between the OPi0 GPIO, H2+/H3 I/O, the Linux sysfs interface and the H2+/H3 alternate pin function.+This is the relationship between the Orange Pi Zero GPIO pins, H2+/H3 I/O, Linux sysfs interface and the H2+/H3 alternate pin functions.
  
 ^Pin ^H2+/H3 I/O ^sysfs ^ALT  | ^Pin ^H2+/H3 I/O ^sysfs ^ALT  |
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 </wrap> </wrap>
  
-We can use the OPi0 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 OPi0 GPIO pins.+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 ==
  
-Low voltage ICSP at 3V3 can be performed directly from the OPi0 GPIOs.+Low voltage ICSP at 3V3 can be performed directly from the GPIOs.
  
-The following connections refer to the OPi0 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>