CCS - MPLAB BOOTLOADER Problem

[Jacques95]

Hello,

I used 18F4550 demo board FS USB as HID USB. I would like to update the firmaware using USB with bootloader. So, I use Microchip standard BOOTLOADER using RB4. It worked with Microchip user'prog example.


So, now I want to download mine and then I got problem. I compile it using CCS PCH 3.235 and here under is the code I would like to download throught PDFSUSB.EXE.

#define _bootload

#ifdef _bootload
#define LOADER_END 0x7FF
#define LOADER_SIZE 0x6FF

#build(reset=LOADER_END+1, interrupt=LOADER_END+9)
#org 0, LOADER_END {}
#endif

void main(void) {

setup_adc_ports(NO_ANALOGS|VSS_VDD);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_spi(FALSE);
setup_timer_0(RTCC_INTERNAL);
setup_timer_1(T1_DISABLED);
setup_ccp1(ccp_off);
setup_timer_2(T2_DISABLED,0,1);
setup_timer_3(T3_DISABLED|T3_DIV_BY_1);
setup_comparator(NC_NC_NC_NC);
enable_interrupts(GLOBAL);
setup_vref(VREF_LOW|-2);
setup_oscillator(FALSE);


while(1)
{
output_toggle(PIN_A5);
delay_ms(1000);
}

}


Connection with PDFSUSB worked :
I got " PIC DEM FS USB 0 (BOOT)"
Then I tried to program and I got message

USB Read Failed.
Failed with error 6 : Descripteur non valide

Somebody has an idea about that error and why I could program it?





Here under is the setup file of the chip

#include <18F4550.h>
//#device ICD=TRUE removed to test the BOOTLOADER
#device adc=8
#FUSES WDT
#FUSES WDT4 //Watch Dog Timer uses 1:4 Postscale
#FUSES HSPLL //High Speed Crystal/Resonator with PLL enabled
#FUSES NOPROTECT //Code not protected from reading
#FUSES NOBROWNOUT //No brownout reset
#FUSES BORV20 //Brownout reset at 2.0V
#FUSES NOPUT //No Power Up Timer
#FUSES NOCPD //No EE protection
#FUSES STVREN //Stack full/underflow will cause reset
//#FUSES DEBUG //Debug mode for ICD
#FUSES NOLVP //Low Voltage Programming on B3(PIC16) or B5(PIC18)
#FUSES NOWRT //Program memory not write protected
#FUSES NOWRTD //Data EEPROM not write protected
#FUSES NOIESO //Internal External Switch Over mode enabled
#FUSES NOFCMEN //Fail-safe clock monitor enabled
#FUSES NOPBADEN //PORTB pins are configured as analog input channels on RESET
#FUSES NOWRTC //configuration not registers write protected
#FUSES NOWRTB //Boot block not write protected
#FUSES NOEBTR //Memory not protected from table reads
#FUSES NOEBTRB //Boot block not protected from table reads
#FUSES CPB //Boot Block code protection
#FUSES MCLR //Master Clear pin enabled
#FUSES LPT1OSC //Timer1 configured for low-power operation
#FUSES NOXINST //Extended set extension and Indexed Addressing mode disabled (Legacy mode)
#FUSES PLL5 //No PLL PreScaler
#FUSES VREGEN
#FUSES USBDIV
#use delay(clock=48000000)

[RockV]

I have same problem.

Seems to work but don't.

Checking the HEX file I have noticed that there is some code below 800h, I think this could be the problem.

But cant find how to push all the code over the 800h.

Maybe #ORG is not working properly.

RockV

[flemse]

Look here.

http://www.etc.ugal.ro/cchiculita/software/picbootloader.htm

http://www.ccsinfo.com/forum/viewtopic.php?t=34065&highlight=tiny+bootloader

//F

[meereck]

i worked with Microchip USB bootloader a year ago, and it was pretty successful.
The bootloader itself resides the memory space 0x000-0x7FF (called boot block)
this is how you can force the CCS compiler to put nothing within this space: