Goplus dc motor driver

ajb2k3

@rob-biernat I don't have one so I cant guess but there are several different versions of the 2pin JST. In what way does it not fit and can you provide photos of the connections?

rob.biernat

My blower fan uses what I think is jst ph series which has a 2mm pitch.

It seems like it's a fraction too large for the m5 stack though.

Surely someone on this forum knows the specifics?

ajb2k3

@rob-biernat Normally the fans connections are using the 2.54mm JST PH spacing which would explain the issues.

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