Add support for Orange Pi Zero 3

[PicoPlanetDev]

The Orange Pi Zero 3 uses an Allwinner H618 processor which appears to be very similar to the H616 used in the Zero 2. In fact, the pin mappings may even be identical. Here's a link to the Zero 3 schematic: OrangePi-Schematic of ZERO3.pdf

As soon as I get my Zero 3 in the mail, I'll see if I can figure out the physical to GPIO pin mappings and create a pull request. In the meantime, I'd love to hear if anyone has experimented with it yet!

[BorretSquared]

Would kill for this.

[PicoPlanetDev]

I submitted a pull request but no news on it for a few months. In the meantime, I've got my fork https://github.com/PicoPlanetDev/OPi.GPIO that simply copies the Zero2 mapping to a new Zero3 file. This has been working flawlessly on my own Zero3 so far. Maybe this helps, although let me know if you want me to flesh it out a little further if needed.

[techsd]

OrangePi Zero2 has 26 GPIO pins, and OrangePi Zero3 has 28.
OrangePi Zero2 has 4 UART pins, and OrangePi Zero3 has 2.
OrangePi Zero2 has 2 SPI pins, and OrangePi Zero3 has 1.
OrangePi Zero2 has 1 I2C pin, and OrangePi Zero3 has 2.

Pin	OrangePi Zero2	OrangePi Zero3
GPIO0	UART0 TX	UART0 TX
GPIO1	UART0 RX	UART0 RX
GPIO2	UART1 TX	GPIO2
GPIO3	UART1 RX	GPIO3
GPIO4	SPI0 MOSI	SPI0 MOSI
GPIO5	SPI0 MISO	SPI0 MISO
GPIO6	SPI0 SCLK	SPI0 SCLK
GPIO7	SPI0 CE0	GPIO4
GPIO8	SPI0 CE1	GPIO5
GPIO9	I2C0 SCL	I2C0 SCL
GPIO10	I2C0 SDA	I2C0 SDA
GPIO11	GPIO11	GPIO11
GPIO12	GPIO12	GPIO12
GPIO13	GPIO13	GPIO13
GPIO14	GPIO14	GPIO14
GPIO15	GPIO15	GPIO15
GPIO16	GPIO16	GPIO16
GPIO17	GPIO17	GPIO17
GPIO18	GPIO18	GPIO18
GPIO19	GPIO19	GPIO19
GPIO20	GPIO20	GPIO20
GPIO21	GPIO21	GPIO21
GPIO22	GPIO22	GPIO22
GPIO23	GPIO23	GPIO23
GPIO24	GPIO24	GPIO24
GPIO25	GPIO25	GPIO25
GPIO26	GPIO26	GPIO26
GPIO27	GPIO27	GPIO27
GPIO28	GPIO28	GPIO28

pin number = (position of letter in alphabet - 1) * 32 + pin number So, PD14 will be (4 - 1) * 32 + 14 = 110

`# Orange Pi Zero 3 physical board pin to GPIO pin
BOARD = {
3: 229, # PH5/I2C3_SDA
5: 228, # PH4/I2C3_SCK
7: 73, # PC9
8: 226, # PH2/UART5_TX
10: 227, # PH3/UART5_RX
11: 70, # PC6
12: 75, # PC11
13: 69, # PC5
15: 72, # PC8
16: 79, # PC15
18: 78, # PC14
19: 231, # PH7,SPI1_MOSI
21: 232, # PH8,SPI1_MISO
22: 71, # PC7
23: 230, # PH6,SPI1_CLK
24: 233, # PH9,SPI1_CS
26: 74, # PC10
27: 234, # PH10/UART6_TX
28: 235, # PH11/UART6_RX
29: 236, # PH12/I2C4_SDA
30: 237, # PH13/I2C4_SCK
31: 238, # PH14/SPI2_MOSI
33: 239, # PH15/SPI2_MISO
34: 240, # PH16/SPI2_CLK
35: 241, # PH17/SPI2_CS
36: 242, # PH18/UART7_TX
37: 243, # PH19/UART7_RX
}

BCM mapping not identified yet, keeping it for compatibility

BCM = BOARD
`

[JMVS]

Is this helpful at all?

Taken from: http://www.orangepi.org/orangepiwiki/index.php/Orange_Pi_Zero_3#26_Pin_Interface_Pin_Description