Gpio on Ulis Notes https://wolf-u.li/en/tag/gpio/ Recent content in Gpio on Ulis Notes Hugo en Copyright 2006-CURRENTYEAR Uli Wolf - All rights reserved Mon, 07 Aug 2023 12:30:34 +0700 BIGTREETECH 40-Pin GPIO - CM4 to CB1 mapping https://wolf-u.li/bigtreetech-40-pin-gpio-cm4-cb1-mapping/ Mon, 07 Aug 2023 12:30:34 +0700 https://wolf-u.li/bigtreetech-40-pin-gpio-cm4-cb1-mapping/ <p>When i received the <a href="https://shareasale.com/r.cfm?b=1890927&u=3683758&m=131011&urllink=https%3a%2f%2fbiqu.equipment%2fcollections%2fcontrol-board%2fproducts%2fbigtreetech-manta-e3ez-v1-0-for-ender3-ender3pro-ender5%3fvariant%3d40286567727202&afftrack=">BIGTREETECH E3EZ*</a> together with a <a href="https://shareasale.com/r.cfm?b=1890927&u=3683758&m=131011&urllink=https%3a%2f%2fbiqu.equipment%2fcollections%2fcontrol-board%2fproducts%2fpi4b-adapter-v1-0%3fvariant%3d40353646051426&afftrack=">CB1*</a> i was wondering how the pinout / gpio on the board was setup. Unfortunately the picture in the User-Manual of the E3EZ was relatively blurry.</p> <p><img src="https://wolf-u.li/upload/2023/08/bigtreetech-40-pin-gpio-cm4-cb1-mapping-1.webp" alt="Manta E3EZ" loading="lazy"></p> <ins class="adsbygoogle" style="display:block; text-align:center;" data-ad-layout="in-article" data-ad-format="fluid" data-ad-client="ca-pub-2322978122735420" data-ad-slot="3161252284"></ins> <p>GPIO stands for General-Purpose Input/Output. It refers to the pins on a microcontroller or single-board computer, like the Raspberry Pi, that can be programmed to serve as either inputs or outputs. These pins enable the device to interact with the external world by receiving or transmitting digital signals. Through software programming, developers can configure GPIO pins to read data from sensors (inputs) or send signals to actuators (outputs), facilitating versatile applications like the control of fans, lights or other 3D printing accessories.</p> When i received the BIGTREETECH E3EZ* together with a CB1* i was wondering how the pinout / gpio on the board was setup. Unfortunately the picture in the User-Manual of the E3EZ was relatively blurry.

Manta E3EZ

GPIO stands for General-Purpose Input/Output. It refers to the pins on a microcontroller or single-board computer, like the Raspberry Pi, that can be programmed to serve as either inputs or outputs. These pins enable the device to interact with the external world by receiving or transmitting digital signals. Through software programming, developers can configure GPIO pins to read data from sensors (inputs) or send signals to actuators (outputs), facilitating versatile applications like the control of fans, lights or other 3D printing accessories.

Thankfully the pinout is the same on the Manta M4P which is why i was able to extract the data from there  (page 9):

Manta M4P

BIGTREETECH describes the pinout of the CM4 the same as the one of the Raspberry pi. However when being used with the CB1, the Pinout Changes. I extracted that information and then used various sources of research to find the corresponding GPIO port: This is the final result:

Pin CM4 CB1 Comment
1 3.3V 3.3V Pin is the same on both boards
2 5V 5V Pin is the same on both boards
3 GPIO2 Not connected Not connected on the CB1
4 5V 5V Pin is the same on both boards
5 GPIO3 Not connected Not connected on the CB1
6 GND GND Pin is the same on both boards
7 GPIO4 PC7 / GPIO71 Different GPIO numbering
8 GPIO14 TX Incompatible - different function!
9 GND GND Pin is the same on both boards
10 GPIO15 RX Incompatible - different function!
11 GPIO17 PC14 / GPIO78 Different GPIO numbering
12 GPIO18 PC13 / GPIO77 Different GPIO numbering
13 GPIO27 PC12 / GPIO76 Different GPIO numbering
14 GND GND Pin is the same on both boards
15 GPIO22 PC10 / GPIO74 Different GPIO numbering
16 GPIO23 PC11 / GPIO75 Different GPIO numbering
17 3.3V 3.3V Pin is the same on both boards
18 GPIO24 PC9 / GPIO73 Different GPIO numbering
19 GPIO10 PH7 / GPIO231 Different GPIO numbering
20 GND GND Pin is the same on both boards
21 GPIO9 PH8 / GPIO232 Different GPIO numbering
22 GPIO25 Not connected Not connected on the CB1
23 GPIO11 ph6 / GPIO230 Different GPIO numbering
24 GPIO8 Not connected Not connected on the CB1
25 GND GND Pin is the same on both boards
26 GPIO7 PG8 / GPIO200 Different GPIO numbering
27 ID_SD ID_SD Pin is the same on both boards
28 ID_SC PG7 / GPIO199 Incompatible - different function!
29 GPIO5 Not connected Not connected on the CB1
30 GND GND Pin is the same on both boards
31 GPIO6 PG6 / GPIO198 Different GPIO numbering
32 GPIO12 PG9 / GPIO201 Different GPIO numbering
33 GPIO13 Not connected Not connected on the CB1
34 GND GND Pin is the same on both boards
35 GPIO19 PC6 / GPIO70 Different GPIO numbering
36 GPIO16 Not connected Not connected on the CB1
37 GPIO26 PC15 / GPIO79 Different GPIO numbering
38 GPIO20 PH10 / GPIO234 Different GPIO numbering
39 GND GND Pin is the same on both boards
40 GPIO21 PC8 / GPIO72 Different GPIO numbering

Update: Now i finally found a mapping in the CB1 repo - check there  if you want to see the mapping for the BTT PI or CB1 MMC version.

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