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Electronics production

 This week we made the FABISP (an in-system programmer for AVR micro controllers). I used this helpful Tutorial First download the Board files (Tracesand Outline).

Connect the "FR1" to the milling mat, (we tried to use the modela but it did not work so we used a different milling machine sherline 5410) then generate the png file to G-code by exporting it to fabmudols.

Then check the path data and correct it if needed.

Loud the traces file,

Use a 1/63" milling bit, insert the bit to the machine, set the X and Y factors and lock them, lower the head with the Z factor until your a couple of mm from the board. Hold the bit with the tip of your finger and release the head until it touches the board. Now set the speed to 30,93,93 (that is the speed that was best on the machine we used) and press play.

Once its finished change the bit to a 1/32" for the outline, and upload the outline file.

Change the speed to max and press paly.

When it's finished separates the board from the excess material.

Now use the labeled Board diagramto guide you what components you need and where to place them


LIST OF COMPONENTS

  • 1 ATTiny 44 microcontroller
  • 1 Capacitor 1uF
  • 2 Capacitor 10 pF
  • 2 Resistor 100 ohm
  • 1 Resistor 499 ohm
  • 1 Resistor 1K ohm
  • 1 Resistor 10K
  • One 6 pin header
  • 1 USB connector
  • 2 jumpers - 0 ohm resistors
  • 1 Cystal 20MHz
  • Two Zener Diode 3.3 V
  • One usb mini cable
  • One ribbon cable
  • Two 6 pin connectors

Once you gather all the components start soldering them to the board
(start with the mini USB that is the hardest to assemble. first solder the mini USB 4 legs then the tiny pins. if you solder too much use disordering braid to remove the excess solder).
Then solder the microcontroller (you can know the direction of it by the little circle on the top left).
Keep soldering all the components to the board.

Then check with a multi-meter all the connections to make sure that theirs no shortage on the circuit.

Now test your FABISP and connect it to the computer.

TROUBLE SHOOTING

  • If you get a message that the board is drawing too much power from the computer and its shutting down the port that means you have a shortage on the board.

    • 1.Check the board once more with the multi-meter.
    2.Smooth the solder joints that looks cold.

    If you don't receive any message you have a green light to install the software.

    PROGRAMING THE FABISP

    First you need to download the necessary software for AVR programing from this Tutorial then connect your FABISP to the AVR programer
  • If you get a green light means its all redy to go.
  • If you get a yellow light that means you have aproblem wioth your bord check for shorteges and clods.
  • If you get a red light that means the bored is not getting power re check the bored.


    • Now open the makefile on your computer,then compile the firmware

    Type:

    make clean - If you are successful - you will see this response from the system:

    omerayal:~/Desktop/firmware$ make clean
    rm -f main.hex main.lst main.obj main.cof main.list main.map main.eep.hex 
    main.elf *.o usbdrv/*.o main.s usbdrv/oddebug.s usbdrv/usbdrv.s

    Type:

    make hex - If you are successful - you will see this response from the system:
    omerayal:~/Desktop/firmware$ make hex
avr-gcc -Wall -Os -DF_CPU=20000000	 -Iusbdrv -I. -DDEBUG_LEVEL=0 
-mmcu=attiny44 -c usbdrv/usbdrv.c -o usbdrv/usbdrv.o
avr-gcc -Wall -Os -DF_CPU=20000000	 -Iusbdrv -I. -DDEBUG_LEVEL=0 
-mmcu=attiny44 -x assembler-with-cpp -c usbdrv/usbdrvasm.S -o usbdrv/usbdrvasm.o
avr-gcc -Wall -Os -DF_CPU=20000000	 -Iusbdrv -I. -DDEBUG_LEVEL=0 
-mmcu=attiny44 -c usbdrv/oddebug.c -o usbdrv/oddebug.o
avr-gcc -Wall -Os -DF_CPU=20000000	 -Iusbdrv -I. -DDEBUG_LEVEL=0 
-mmcu=attiny44 -c main.c -o main.o
avr-gcc -Wall -Os -DF_CPU=20000000	 -Iusbdrv -I. -DDEBUG_LEVEL=0 
-mmcu=attiny44 -o main.elf usbdrv/usbdrv.o usbdrv/usbdrvasm.o usbdrv/oddebug.o 
main.o
rm -f main.hex main.eep.hex
avr-objcopy -j .text -j .data -O ihex main.elf main.hex
avr-size main.hex
   text	   data	    bss	    dec	    hex	filename
      0	   2020	      0	   2020	    7e4	main.hex

    Type:

    make fuse - If you are successful - you will see the following response from the system:
    omerayal:~/Desktop/firmware$ sudo make fuse
avrdude -c usbtiny -p attiny44  -U hfuse:w:0xDF:m -U lfuse:w:0xFF:m

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.01s

avrdude: Device signature = 0x1e9207
avrdude: reading input file "0xDF"
avrdude: writing hfuse (1 bytes):

Writing | ################################################## | 100% 0.00s

avrdude: 1 bytes of hfuse written
avrdude: verifying hfuse memory against 0xDF:
avrdude: load data hfuse data from input file 0xDF:
avrdude: input file 0xDF contains 1 bytes
avrdude: reading on-chip hfuse data:

Reading | ################################################## | 100% 0.00s

avrdude: verifying ...
avrdude: 1 bytes of hfuse verified
avrdude: reading input file "0xFF"
avrdude: writing lfuse (1 bytes):

Writing | ################################################## | 100% 0.01s

avrdude: 1 bytes of lfuse written
avrdude: verifying lfuse memory against 0xFF:
avrdude: load data lfuse data from input file 0xFF:
avrdude: input file 0xFF contains 1 bytes
avrdude: reading on-chip lfuse data:

Reading | ################################################## | 100% 0.00s

avrdude: verifying ...
avrdude: 1 bytes of lfuse verified

avrdude: safemode: Fuses OK

avrdude done.
    Now you want to program the board to be an ISP.

    Type:

    make program - If you are successful - you will see the following response from the system:
    omerayal:~/Desktop/firmware$ sudo make program
[sudo] password for omerayal: 
avrdude -c usbtiny -p attiny44  -U flash:w:main.hex:i

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.01s

avrdude: Device signature = 0x1e9207
avrdude: NOTE: FLASH memory has been specified, an erase cycle will be performed
         To disable this feature, specify the -D option.
avrdude: erasing chip
avrdude: reading input file "main.hex"
avrdude: writing flash (2020 bytes):

Writing | ################################################## | 100% 5.68s



avrdude: 2020 bytes of flash written
avrdude: verifying flash memory against main.hex:
avrdude: load data flash data from input file main.hex:
avrdude: input file main.hex contains 2020 bytes
avrdude: reading on-chip flash data:

Reading | ################################################## | 100% 3.36s



avrdude: verifying ...
avrdude: 2020 bytes of flash verified

avrdude: safemode: Fuses OK

avrdude done.  Thank you.

avrdude -c usbtiny -p attiny44  -U hfuse:w:0xDF:m -U lfuse:w:0xFF:m

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.01s

avrdude: Device signature = 0x1e9207
avrdude: reading input file "0xDF"
avrdude: writing hfuse (1 bytes):

Writing | ################################################## | 100% 0.00s

avrdude: 1 bytes of hfuse written
avrdude: verifying hfuse memory against 0xDF:
avrdude: load data hfuse data from input file 0xDF:
avrdude: input file 0xDF contains 1 bytes
avrdude: reading on-chip hfuse data:

Reading | ################################################## | 100% 0.00s

avrdude: verifying ...
avrdude: 1 bytes of hfuse verified
avrdude: reading input file "0xFF"
avrdude: writing lfuse (1 bytes):

Writing | ################################################## | 100% 0.00s

avrdude: 1 bytes of lfuse written
avrdude: verifying lfuse memory against 0xFF:
avrdude: load data lfuse data from input file 0xFF:
avrdude: input file 0xFF contains 1 bytes
avrdude: reading on-chip lfuse data:

Reading | ################################################## | 100% 0.00s

avrdude: verifying ...
avrdude: 1 bytes of lfuse verified

avrdude: safemode: Fuses OK

avrdude done.  Thank you.

    Now after you programed the bored Remove the solder bridge

    connect it to your computer and you will receive the message

    Now your ready to program with your FABISP

  • For Better instructions check the tutorial byAnna kaziunas.

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