M5StickC (ESP32 based) gives psram error-infinite reboots

This initialisation code seems to work - it turns the backlight on, charges the battery etc. Needs to be put into a module when time permits. You can get the battery voltage and current using batV and batA:

I2C1.setup({scl:22,sda:21,bitrate:400000});

function init(){
    function Write1Byte(a,d) { I2C1.writeTo(0x34,a,d);}
    // Set LDO2 & LDO3(TFT_LED & TFT) 3.0V
    Write1Byte(0x28, 0xcc);  
    // Set ADC to All Enable
    Write1Byte(0x82, 0xff);
    // Bat charge voltage to 4.2, Current 100MA
    Write1Byte(0x33, 0xc0);
    // Enable Bat,ACIN,VBUS,APS adc
    Write1Byte(0x82, 0xff);
    // Enable Ext, LDO3, DCDC1
    // Close DCDC2 output
    // with out LD02 LCD light it is 0x49 
    Write1Byte(0x12, 0x4D);        
    // 128ms power on, 4s power off
    Write1Byte(0x36, 0x0C);
    // Set RTC voltage to 3.3V
    Write1Byte(0x91, 0xF0); 
    // Set GPIO0 to LDO
    Write1Byte(0x90, 0x02);
    // Disable vbus hold limit
    Write1Byte(0x30, 0x80);
    // Set temperature protection
    Write1Byte(0x39, 0xfc);
    // Enable RTC BAT charge 
    Write1Byte(0x35, 0xa2);
    // Enable bat detection
    Write1Byte(0x32, 0x46);
}

init();

function batV() {
    I2C1.writeTo(0x34,0x78);
    var d = I2C1.readFrom(0x34,2);
    var v = d[0]*16+d[1];
    const ADCLSB = 1.1 / 1000.0;
    return v * ADCLSB;
}

function batA() {
    function read13(a){
        I2C1.writeTo(0x34,a);
        var d = I2C1.readFrom(0x34,2);
        return d[0]*32+d[1];
    }
    // current in - current out (ma);
    return ( read13(0x7A)-read13(0x7C))/2;
}