Assignment 04, Yabed Contreras - Fab Academy 2014

>> Week 04, Feb 19: Electronics production

Make the FabISP in-circuit programmer

> About ISP (in-system programmer), FabISP

> Materials List (Including equipment)

> PCB Fabrication (Method Machining)

> Assembly the components (Surface-mount)

> Programing (AVRISP2 programer)

About ISP (in-system programmer), FabISP

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For some information about "In-system programming", click on the following link: ISP

About FabISP: "The FabISP is an in-system programmer for AVR microcontrollers, designed for production within a FabLab. That is, it allows you to program the microcontrollers on other boards you make, using nothing but a USB cable and 6-pin IDC to 6-pin IDC cable. It's based on the USBtiny and V-USB firmwares, which allow the ATtiny44 to perform USB communication in software. Programming can be done through avrdude." David A. Mellis in http://fab.cba.mit.edu/content/projects/fabisp/

In this assignment, I made "hello.ISP.44" with crystal, the source files can be found in the assignment instructions: http://academy.cba.mit.edu/classes/electronics_production/index.html

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Materials List (Including equipment)

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Electronic Components List:

x1	IC1	ATtiny44A-SSU - IC MCU 8BIT 4KB Flash 14SOIC
x1	20 MHz	Crystal 20MHz 8pF SMD
x1	J2 USB	Connector Receptacle Mini USB2.0 5 contacts
x1	J1	Male Pin 3x2 - Bergstik Headers 2X3P UNSHRD HDR 30 microinch gold
x2	D1,D2	Diode Zener 3.3V 500mW SOD123
x2	C2, C3	Capacitor ceramic 10pF 50v NP0 1206
x1	C1	Capacitor ceramic 1µF 50v X7R 10% 1206-
x1	R1	Resistor 1kΩ - RES 1.00K OHM 1-4W 1% 1206 SMD-
x1	R2	Resistor 499Ω - RES 499 OHM 1-4W 1% 1206 SMD-
x2	R3, R4	Resistor 100Ω - RES 100 OHM 1-4W 1% 1206 SMD
x1	R5	Resistor 10kΩ - RES 10.0K OHM 1-4W 1% 1206 SMD

Others materials:

Dual side adhesive tape
Machineable PCB, Single side circuit board, FR1
Solder wire
Paste

Equipment:

MDX-20 milling machine
Solid Carbide End Mills: 0.0156" DIA 2FL SE BALLNOSE AlTiN 1/64
Celestron 44302 Handheld Digital Microscope
Fan Fume Absorber Benchtop
Tweezer Curved Precision TIP
Soldering Station, TIP Single Flat 0.015"
Computer with SO Ubuntu
Programmer AVR in System

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PCB Fabrication (Method machining)

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	I use milling machine: Roland MDX-20
	Use: End mill, size 1/64 Advertencia: La Fresa de 1/64 es fragil, hay que tener mucho cuidado al momento de calibrar la Modela y al momento poner los parametros en Fab Modules
	Fix the PCB with the help of double-sided tape
	Using Adobe Photoshop (or any other software), the circuit can be customized. Then, using "fab modules", proceed with milling.

	Was the first time I used the milling machine and I did some testing with "fab modules".
	I used the following parameters: Diameter 0.2; Offsets 1.5; Overlap 0.4, 2D threshold 0.5; error 0.001; 2Dz -0.2; speed 4; jog 1.0
	PCB final
	Finally, to use: End mill, size 1/32. for sending the job to cut out the board

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Assembly the components (Surface-mount)

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	All electronic components should be ready to be used.
	Given the size of the electronic components, you may need a magnifying glass or microscope to identify them correctly
	Enable welding station
	With patience and good cheer to weld


	Finished

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Programming (AVRISP2 programer)

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> Download drivers

> Programing FabISP

I used AVRISP2 programer

Download drivers

Then, begin the programming steps in the Ubuntu terminal:

root@tecsup-N56VZ:~# apt-get install flex byacc bison gcc libusb-dev avrdudeLeyendo lista de paquetes... Hecho.....

root@tecsup-N56VZ:~# apt-get install gcc-avrLeyendo lista de paquetes... Hecho......

root@tecsup-N56VZ:~# apt-get install avr-libcLeyendo lista de paquetes... Hecho......
root@tecsup-N56VZ:~# apt-get install libc6-devLeyendo lista de paquetes... Hecho.......

Programing FabISP

We are ready to connect to AVRISP Programming and computer. Then in the terminal of Ubuntu start the steps for programming.

root@tecsup-N56VZ:~/Descargas/firmware/fabISP_mac.0.8.2_firmware# make cleanrm -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

root@tecsup-N56VZ:~/Descargas/firmware/fabISP_mac.0.8.2_firmware# make hexavr-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

root@tecsup-N56VZ:~/Descargas/firmware/fabISP_mac.0.8.2_firmware# make fuseavrdude -c avrisp2 -P usb -p attiny44 -U hfuse:w:0xDF:m -U lfuse:w:0xFF:mavrdude: AVR device initialized and ready to accept instructions

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

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 verifiedavrdude: safemode: Fuses OK

avrdude done. Thank you.

root@tecsup-N56VZ:~/Descargas/firmware/fabISP_mac.0.8.2_firmware# make programavrdude -c avrisp2 -P usb -p attiny44 -U flash:w:main.hex:i

avrdude: AVR device initialized and ready to accept instructions

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

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% 0.70s

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% 0.58s

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

avrdude: safemode: Fuses OK

avrdude done. Thank you.

avrdude -c avrisp2 -P usb -p attiny44 -U hfuse:w:0xDF:m -U lfuse:w:0xFF:m