Suck on boot, LED flashes on and off

[kawasakizx10rr]

Hello I have flashed the bootloader to my mega2560 and when i set the eeprom to 0xF0 and reset the mega the LED blinks on for 6 secs and off for a half a second in an constant loop, and it never flashes the code from the SD card or boots, The only way to get it to boot is to unplug the SD card OR set the eeprom back to 0xFF, to which it then boot the old code instead ?? Any Idea what's going on please.

I made a new board and flash the bootloader as i describe below.

C:\Users\Myname\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.6.17

And a new bootloader folder named microbridge in the bootloader folder of the same directory copying the entire folder contents bootloader files ###############################################################

microbridge.name=Arduino Mega2560 Dual SD Boot

microbridge.vid.0=0x2341 microbridge.pid.0=0x0010 microbridge.vid.1=0x2341 microbridge.pid.1=0x0042 microbridge.vid.2=0x2A03 microbridge.pid.2=0x0010 microbridge.vid.3=0x2A03 microbridge.pid.3=0x0042 microbridge.vid.4=0x2341 microbridge.pid.4=0x0210 microbridge.vid.5=0x2341 microbridge.pid.5=0x0242

microbridge.upload.tool=avrdude microbridge.upload.protocol=stk500v2 microbridge.upload.maximum_size=258048 microbridge.upload.maximum_data_size=8192 microbridge.upload.speed=115200

microbridge.bootloader.tool=avrdude microbridge.bootloader.low_fuses=0xFF microbridge.bootloader.high_fuses=0xD8 microbridge.bootloader.extended_fuses=0xFD microbridge.bootloader.file=microbridge/stk500boot.hex microbridge.bootloader.unlock_bits=0x3F microbridge.bootloader.lock_bits=0x0F

microbridge.build.mcu=atmega2560 microbridge.build.f_cpu=16000000L microbridge.build.board=AVR_MICROBRIDGE microbridge.build.core=arduino microbridge.build.variant=mega

and then made the binary file as you describe

avr-objcopy.exe -I elf32-avr -O binary Blink.ino.elf firmware.bin

then placed that firmware.bin in my SD card.

I have tried both FAT and FAT32 formats and both formats work fine with the standard SD library and i am able to see the firmware.bin file

I then use you firstRun code to set the EEPROM block EEPROM.write(0x1FF,0xF0); and it resets and then just hangs on a blinking LED on for about 6 seconds and off for about half a second, I assume it it constantly trying to load the code from the SD card ??

I have not touched the stk500boot.hex file as some are rebuilding it, do i need to modify it ?? I am using the standard pins 50,51,52,53 with a 2Gb SD card which again works fine with the default SD card library.

Please help this is for a company and i can pay you for a working example.

[Mesger1]

you can easily build the bootloader yourself. You just need to set the correct SPI Pins for your device that is serving the bin file.

Kind regards,

Gerd

On 24 August 2018 at 20:42, kawasakizx10rr notifications@github.com wrote:

Hello I have flashed the bootloader to my mega2560 and when i set the eeprom to 0xF0 and reset the mega the LED blinks on for 6 secs and off for a half a second and it never boots to the code, unless I unplug the SD card OR set the eeprom back to 0xFF ?? Any Idea what's going on please.

I made a new board and flash the bootloader as i describe below.

C:\Users\Myname\AppData\Local\Arduino15\packages\arduino\ hardware\avr\1.6.17

And a new bootloader folder named microbridge in the bootloader folder of the same directory copying the entire folder contents bootloader files ###############################################################

microbridge.name=Arduino Mega2560 Dual SD Boot

microbridge.vid.0=0x2341 microbridge.pid.0=0x0010 microbridge.vid.1=0x2341 microbridge.pid.1=0x0042 microbridge.vid.2=0x2A03 microbridge.pid.2=0x0010 microbridge.vid.3=0x2A03 microbridge.pid.3=0x0042 microbridge.vid.4=0x2341 microbridge.pid.4=0x0210 microbridge.vid.5=0x2341 microbridge.pid.5=0x0242

microbridge.upload.tool=avrdude microbridge.upload.protocol=stk500v2 microbridge.upload.maximum_size=258048 microbridge.upload.maximum_data_size=8192 microbridge.upload.speed=115200

microbridge.bootloader.tool=avrdude microbridge.bootloader.low_fuses=0xFF microbridge.bootloader.high_fuses=0xD8 microbridge.bootloader.extended_fuses=0xFD microbridge.bootloader.file=microbridge/stk500boot.hex microbridge.bootloader.unlock_bits=0x3F microbridge.bootloader.lock_bits=0x0F

microbridge.build.mcu=atmega2560 microbridge.build.f_cpu=16000000L microbridge.build.board=AVR_MICROBRIDGE microbridge.build.core=arduino microbridge.build.variant=mega

and then made the binary file as you describe

avr-objcopy.exe -I elf32-avr -O binary Blink.ino.elf firmware.bin

then placed that firmware.bin in my SD card.

I have tried both FAT and FAT32 formats and both formats work fine with the standard SD library and i am able to see the firmware.bin file

I then use you firstRun code to set the EEPROM block EEPROM.write(0x1FF,0xF0); and it resets and then just hangs on a blinking LED on for about 6 seconds and off for about half a second, I assume it it constantly trying to load the code from the SD card ??

I have not touched the stk500boot.hex file as some are rebuilding it, do i need to modify it ?? I am using the standard pins 50,51,52,53 with a 2Gb SD card which again works fine with the default SD card library.

Please help this is for a company and i can pay you for a working example.

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[kawasakizx10rr]

I used the pins 50,51,52,53 as referred to here https://www.arduino.cc/en/Reference/SPI

Please please for the love of god help, i have no idea how to build the bootloader.

https://thepihut.com/products/microsd-card-module-for-arduino?variant=27740691473&gclid=Cj0KCQjw2f7bBRDVARIsAAwYBBu77j3kKEnipbn8A9iYVVgZzTIpCVDOr1dnTiNAyX7vyPwTO1Si29kaAhRoEALw_wcB#fo_c=1889&fo_k=2731608ae722ae6e7aa50dda1e4cd0c2&fo_s=gplauk

The asmfunc.S has this at the top

;---------------------------------------------------------------------------; ; MMC hardware controls and Flash controls (C)ChaN, 2010 ;---------------------------------------------------------------------------; ; Hardware dependent macros to be modified

//sparkfun microsd //#define DDR_CS _SFR_IO_ADDR(DDRB), 0 // MMC CS pin (DDR, PORT) //#define PORT_CS _SFR_IO_ADDR(PORTB), 0 // pin 53 // i2GPS //#define DDR_CS _SFR_IO_ADDR(DDRB), 2 // MMC CS pin (DDR, PORT) //#define PORT_CS _SFR_IO_ADDR(PORTB), 2 // pin 51

// Arduino Ethernet

define DDR_CS _SFR_IO_ADDR(DDRB), 0 // MMC CS pin (DDR, PORT)

define PORT_CS _SFR_IO_ADDR(PORTB), 0 // pin 53

define DDR_CK _SFR_IO_ADDR(DDRB), 1 // MMC SCLK pin (DDR, PORT)

define PORT_CK _SFR_IO_ADDR(PORTB), 1 // pin 52

define DDR_DI _SFR_IO_ADDR(DDRB), 2 // MMC DI pin (DDR, PORT)

define PORT_DI _SFR_IO_ADDR(PORTB), 2 // pin 51

define PIN_DO _SFR_IO_ADDR(PINB), 3 // MMC DO pin (PIN, PORT)

define PORT_DO _SFR_IO_ADDR(PORTB), 3 // pin 50

I have researched the PORTS they are set as he stated from 50 to 53 to which my Sd card reader is attached to those pins and connecting an LED i do see them go high and pulse so is it my SD card ?

I have it set to default FAT format settings and its 2GB and it works fine with the SD library in normal Arduino IDE, i tried his example .bin file and your fading.bin file along with my own bin file all don't flash it just sits there rebooting forever with about a 6 second pause in between to which the SPI lines go high

so i assume it just constantly trying to read the SD card but fails ? should it not skip it after x attempts ?