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https://github.com/easytarget/MQ-Pro-IO.git
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520118f143
Improve support for custom device trees when kernel updates are received * Modified make-trees.sh so that it builds for all installed kernels. * A new script flash-latest.sh that copies the resulting .dtb files into the /etc/flash-kernel/dtbs/ override folder. The build-trees README is updated for this, and shows how to configure flash-kernel to use the custom .dtbs. Kernel upgrade should now go: [after a new kernel upgrade is installed] * Upgrade source: cd source && apt source linux-riscv * Build dtb's: cd build-trees &&; ./make_dtbs.sh * Install device tree via softlinks ./flash_latest.sh * Reboot
3.0 KiB
3.0 KiB
list-pins.py
This is a tool that displays a ascii-art 'map' of the current pinmux assignments on the GPIO header
To run the pin list tool you need to be in the tools directory, then run:
$ python3 list-pins.py MangoPi-MQ-Pro
- The script requires root acces (via sudo) to read the pin maps.
- Running the script produces the same map I use in this documentation.
- The data used to assemble the
.gpiomap files identifies which interface a pin is attached to, but not it's specific function for the interface.- eg it can say 'pinX and pinY are mapped to UART2', but cannot identify which pin is the TX and which is the RX; a limitation of the data, my apologies..
- You therefore need to reference the D1 pin mapping table to get the exact functions for pins when running this for yourself.
Default output
This is the default output for the MQ-Pro with the default device tree:
MangoPI MQ Pro GPIO header (dtb name: MangoPi MQ Pro)
Gpio Header:
func des pin pin des func
3v3 1 --o o-- 2 5v
free (205) PG13 3 --o o-- 4 5v
free (204) PG12 5 --o o-- 6 gnd
free (39) PB7 7 --o o-- 8 PB8 uart0 (2500000.serial:40)
gnd 9 --o o-- 10 PB9 uart0 (2500000.serial:41)
free (117) PD21 11 --o o-- 12 PB5 free (37)
free (118) PD22 13 --o o-- 14 gnd
free (32) PB0 15 --o o-- 16 PB1 free (33)
3v3 17 --o o-- 18 PD14 free (110)
free (108) PD12 19 --o o-- 20 gnd
free (109) PD13 21 --o o-- 22 PC1 free (65)
free (107) PD11 23 --o o-- 24 PD10 free (106)
gnd 25 --o o-- 26 PD15 free (111)
free (145) PE17 27 --o o-- 28 PE16 free (144)
free (42) PB10 29 --o o-- 30 gnd
free (43) PB11 31 --o o-- 32 PC0 free (64)
free (44) PB12 33 --o o-- 34 gnd
free (38) PB6 35 --o o-- 36 PB2 free (34)
free (113) PD17 37 --o o-- 38 PB3 free (35)
gnd 39 --o o-- 40 PB4 free (36)
Other gpio outputs of interest:
-- PD18: Blue Status Led - gpio (2000000.pinctrl:114)
Notes:
- I2C pins 3,5,27 and 28 (PG13, PG12, PE17 and PE16) have 10K pullup resistors to 3v3
- The Status LED (PD18) is common with the LED_PWM pin on the DSI/LVDS output