Bus Mapping M5Core2 <-> M5Stack

sheepDog

Hello,

in past I used some M5Stack modules at M5Stack and now I like to migrate to M5Core2. The challenge ist the different bus system.

Pin	M5Stack	M5Core2
GND	2	1,3,5
SCK	4	11
MISO	6	9
RESET	8	6
nu	10	-
nu	12	-
A0	14	-
A1	16	-
A2	18	-
A3	20	-
A4	22	-
A5	24	-
AREF	26	-
IO12	28	-
IO13	30	-
5V	1	28
MOSI	3	7
SS	5	-
D0/RX	7	13
D1/Tx	9	14
D2/SDA	11	SYS:17, EXT:19
D3/SCI	13	SYS:18, EXT:20
D4	15	-
D5	17	-
D6	19	-
D7	21	-
IO8	23	-
IO9	25	-
IO10	27	-
IO11	29	-
IO35	-	2
IO36	-	4
IO25	-	8
IO26	-	10
3,3V	-	12
Rx2	-	15
Tx2	-	16
IO19	-	22
IO0	-	24
IO34	-	26
BAT	-	30

Who has experience with using an M5Stack module on an M5Core2?

m5stack

Core2-bus has some differences with M5-bus. so when you stack the module to the core2. you need to make some pin num change in your code.

felmue

Hi guys

I've put together a comparison sheet showing the similarities and differences between M5Stack / M5Core2 bus and GPIO usage. You can find it here:

https://www.gwendesign.ch/kb/m5stack/m5core2/#m5core2-bus-and-gpios-compared-to-m5stack

Cheers
Felix

m5stack

@felmue Thank you for your help.

Nlindin

@m5stack Hi! Could you please put an example? I can not find a valid one. For example, how can we -using arduino- mix Core2 and GoPlus2 module? The example does not work. Thank you very much!

ajb2k3

@nlindin what is arduino- mix Core2 ?
Go plus2 is sat on my bench waiting to be documented when i finish the coreink but had some issue with the coreink delaying documentation.

Nlindin

@ajb2k3 Thank you for your answer. I want to say an example in arduino for Core2+Goplus2. With Uiflow it seems to work fine. With Arduino I am totally stuck in this scenario.

Nlindin

Hi again!
For now I have changed the .ino from GPIO 5 to GPIO 33, (35 is the same for both, Stack and Core2) but the ir receiver gives only "PARAM LEN ERROR" from all my remotes and buttons. I continue doing something wrong with the Core2+Goplus 2.
Any help, please?
Thank you!

Nlindin

@ajb2k3 The IR in the GoPlus2 gives this by the serial monitor. Any updates?
Thank you and happy 2021.
E (42353) rmt: rmt_write_items(797): RMT PARAM LEN ERROR
send done
76
recv done
76
.
.
.

Nlindin

@nlindin This one works!

#include <M5Core2.h>
#include <IRremote.h>

IRrecv irrecv(35);
decode_results ircode;

void setup() {
M5.begin();
irrecv.enableIRIn();
}

void loop()
{
if (irrecv.decode(&ircode))
{
Serial.println(ircode.value, HEX);
delay(100);
irrecv.resume();
}
m5.update();
}