Programme with pickit 3

[AndrewB]

I have just tried to program a clean pic24 using the Hex file generated but the display does not work.
Its responding to buttons.

Is there anything I have to do to the main program prior?

I am using a pickit3

[David John Barker]

If your program works when bootloaded, but fails to work when you build the *.hex file yourself and then program, then it's your fuse settings. Easier way is to match the fuse settings in the loader

http://www.firewing.info/pmwiki.php?n=Firewing.Firewing24#Firmware

[Jerry Messina]

Here are the settings from the loader...

Code: Select all

// 24HJ128GP502 default fuse settings from the pic24 firewingLoader.s file
config  FBS = {BWRP_WRPROTECT_OFF}
config  FSS = {SWRP_WRPROTECT_OFF}
config  FGS = {GWRP_OFF}
config  FOSCSEL = {FNOSC_FRCPLL, IESO_OFF}
config  FOSC = {POSCMD_NONE, OSCIOFNC_ON, IOL1WAY_OFF, FCKSM_CSECMD}
config  FWDT = {WDTPOST_PS256, WINDIS_OFF, FWDTEN_OFF}
config  FPOR = {FPWRT_PWR128, ALTI2C_OFF}
config  FICD = {ICS_PGD1, JTAGEN_OFF}


[AndrewB]

Where do I place this? At the beginning of the firewing code or somewhere in MLAB?

[Jerry Messina]

Put them in your main firewing module.

The last config statements seen override any previous ones, so if you put it after all the "imports" they'll be the ones that are in effect...

Code: Select all

imports mplabicd

' these config statements override any previous ones
// 24HJ128GP502 default fuse settings from the pic24 FW bootloader
config  FBS = {BWRP_WRPROTECT_OFF}
config  FSS = {SWRP_WRPROTECT_OFF}
config  FGS = {GWRP_OFF}
config  FOSCSEL = {FNOSC_FRCPLL, IESO_OFF}
config  FOSC = {POSCMD_NONE, OSCIOFNC_ON, IOL1WAY_OFF, FCKSM_CSECMD}
config  FWDT = {WDTPOST_PS256, WINDIS_OFF, FWDTEN_OFF}
config  FPOR = {FPWRT_PWR128, ALTI2C_OFF}
config  FICD = {ICS_PGD1, JTAGEN_OFF}

Sub Main()

End Sub


[AndrewB]

Thanks

[Coccoliso]

Hi Jerry
should not also set the oscillator with the macro ? (which in any case it is the one that you gave me )
Must be called as the first line in main sub.

Code: Select all

macro SetSysClock()
    const sysClock = _clock

    // Fosc = Fin * (M/N1*N2))
    // CLKDIVbits.FRCDIV = 0    (CLKDIV[10:8]) FRC/1= 7.3728MHz
    // CLKDIVbits.PLLPOST = N2  (CLKDIV[7:6])  N2: 00=2, 01=4, 11=8
    // CLKDIVbits.PLLPRE = 2-N1 (CLKDIV[4:0])  N1 = 2-33
    // PLLFBDbits.PLLDIV = M-2
    if (sysClock = 80) then     // 40 MIPS
        const FRCDIV = 0
        const PLLPOST = 0
        const PLLPRE = 1
        const PLLDIV = 63       // 39.94
        WREG4 = (CLKDIV and &HF800) or (FRCDIV<<8) or (PLLPOST<<6) or PLLPRE
        CLKDIV = WREG4
        PLLFBD = PLLDIV               
    elseif (sysClock = 64) then // 32 MIPS                   
        const FRCDIV = 0
        const PLLPOST = 0
        const PLLPRE = 1
        const PLLDIV = 50       // 31.95
        WREG4 = (CLKDIV and &HF800) or (FRCDIV<<8) or (PLLPOST<<6) or PLLPRE
        CLKDIV = WREG4
        PLLFBD = PLLDIV               
    elseif (sysClock = 32) then // 16 MIPS                   
        const FRCDIV = 0
        const PLLPOST = 1
        const PLLPRE = 1
        const PLLDIV = 50       // 15.97
        WREG4 = (CLKDIV and &HF800) or (FRCDIV<<8) or (PLLPOST<<6) or PLLPRE
        CLKDIV = WREG4
        PLLFBD = PLLDIV               
    elseif (sysClock = 16) then // 8 MIPS
        const FRCDIV = 0
        const PLLPOST = 3
        const PLLPRE = 1
        const PLLDIV = 50       // 7.99 
        WREG4 = (CLKDIV and &HF800) or (FRCDIV<<8) or (PLLPOST<<6) or PLLPRE
        CLKDIV = WREG4
        PLLFBD = PLLDIV               
    elseif (sysClock = 8) then  // 4 MIPS
        const FRCDIV = 1        // note: this is outside the VCO range... should use FNOSC_FRC mode
        const PLLPOST = 3
        const PLLPRE = 1
        const PLLDIV = 50 
        WREG4 = (CLKDIV and &HF800) or (FRCDIV<<8) or (PLLPOST<<6) or PLLPRE
        CLKDIV = WREG4
        PLLFBD = PLLDIV               
    else
        checkparam(etError, "unsupported system clock freq")
    end if

    // trim osc for accurate baud (optional)
    'OSCTUN = &H03A

    // wait until the PLL is locked
    while (OSCCON.bits(5) = 0)    // check LOCK bit
    end while
end macro


[AndrewB]

Thanks Coccoliso

So this goes before and the other switches after?

Would be nice to have a confirmed info on this.

if I want read protect what do i do?

[Jerry Messina]

By default, Firewing will set up the clock for you, so you may not need that macro.

Here are two threads that talk about using the pickit and no bootloader...

viewtopic.php?f=12&t=216
viewtopic.php?f=12&t=238


To change the protection you'd change the General Segment config setting

Code: Select all

config  FGS = {GWRP_OFF}     // no protection


There are a number of different types/levels... you'd probably be ok with GSS_STD. See http://ww1.microchip.com/downloads/en/D ... 70239B.pdf

[AndrewB]

Thanks Jerry.

I will read up and test above.

thanks all for the help.