Goplus dc motor driver

rob.biernat

Ok no probs. For now I have stuff going with a jumper wire hack but I can buy some proper jst cables tommorow.

Is the person who wrote the go plus firmware and sample code on this forum? I can understand most of the code but since the code is not documented and not included in the m5 stack arduino library I need some help understanding the messages that get sent out on the i2c bus and what they do.

ajb2k3

@rob-biernat Looks like he is but he is not active.
@zhouyang can you help?

rob.biernat

Ok so I have the dc motor controller working but when will the sample code be cleaned up and documented. At the moment it's a bit rough with lots of magic numbers scattered through the code. Ideally a proper api

rob.biernat

Any updates from the bloke who wrote the code?

rob.biernat

Anything from the programmer?

ajb2k3

@rob-biernat said in Goplus dc motor driver:

Anything from the programmer?

Nope, still waiting.

lukasmaximus

Is this the code in question?

#include <Arduino.h>
#include <M5Stack.h>

#define IrPin 13
#define PLUS_ADDR 0x62

int32_t number = 0;
uint8_t press = 0;


void setup() {
    M5.begin(true, false, false);
    M5.Lcd.setTextFont(6);
    M5.Lcd.clear(BLACK);
    M5.Lcd.setTextColor(ORANGE, BLACK);
    Wire.begin();
    ledcSetup(1, 38000, 10);
    ledcAttachPin(IrPin, 1);
}

void plus_encode() {
    Wire.requestFrom(PLUS_ADDR, 2);
    while(Wire.available()) {
        int8_t encode = Wire.read();
        uint8_t press_n = Wire.read();
        number += encode;
        if(press_n == 0xff) {
            press = 0;
        }
        else {
            press = 1;
        }
    }
}

void loop() {
    char data[20];

    plus_encode();
    ledcWrite(1, ledcRead(1) ? 0 : 512);
    sprintf(data, "%d  %d        ", number, press);
    M5.Lcd.setCursor(100, 100);
    M5.Lcd.print(data);
    vTaskDelay(200);
}

I have a feeling the engineer who wrote the code may no longer work at M5Stack but i'll make an enquiry.

liushasha

@rob-biernat
PH2.0

https://item.taobao.com/item.htm?spm=a1z10.3-c-s.w4002-21223910208.112.64e66a4bJ99Q2L&id=522578768957

rob.biernat

Ok given the bloke who wrote the code has left can someone please at least document the i2c messages?

vany5921

https://github.com/m5stack/GoPlus/blob/master/src/src.ino this is sourece code