Electronics Production
I have some theoritical information on electronics that I acquired in my 1st year of engineering. I don't know how they work altough I have an idea what some of the component do.I do find it very interesting as I have a lot of projects that could benefit from some moving parts.I wrote down the start and end points (in mm) and started milling. Because milling just .1mm of copper the dust is minimal and the dustbuster was not nescessary all the time. Though we wanted to see what the machine was doing.
So I downloaded Brian's usb tiny circuit based on ATtiny44 as suggested by professor Neil I tried to understand how the circuit works with that attiny lower speed micro controllers
Details on Brian's USB Tiny Circuit From here
I downloaded the isp png traces and outline from links below
Then I Transfered the png in fabmodules.org in order to get .rml documents:
After that I printed in Roland Mill with the helpof Classmates that normally use it:
Then I identified all the components stated in the document and identified where there were supposed to be soldered,ten I soldered them as I have ad some practice before helping my team in soldering electronics components although the difference here is that the packages are SMD soldered on the Top surface
Componets used
As mentioned above I have some knowledge in soldering although the packages I used to solder are not SMD,The SMD packages are tiny and are soldered on the surface.,So I based my self on the details that are in Brian's link
After the PCB was complete there was one more step to complete and that is to make the thing programmable. First I checked all the connections for electric shortcircuits using a multimeter and found out there were no short circuits. and then for programming it I had no idea where to start
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
main.c:88:13: warning: always_inline function might not be inlinable [-Wattributes]
static void delay ( void )
^
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 2002 0 2002 7d2 main.hex
I had to setup fuse setting by typing
avrdude -c stk500v1 -b19200 -P /dev/ttyACM0 -p attiny44 -U hfuse:w:0xDF:m -U lfuse:w:0xFF:m avrdude: AVR device initialized and ready to accept instructions Reading | ################################################## | 100% 0.02s avrdude: Device signature = 0x1e9207 avrdude: reading input file "0xDF" avrdude: writing hfuse (1 bytes): Writing | ################################################## | 100% 0.01s 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% 0.01s avrdude: verifying ... avrdude: 1 bytes of hfuse verified avrdude: reading input file "0xFF" avrdude: writing lfuse (1 bytes): Writing | ################################################## | 100% 0.02s 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% 0.01s avrdude: verifying ... avrdude: 1 bytes of lfuse verified avrdude: safemode: Fuses OK (E:FF, H:DF, L:FF) avrdude done. Thank you.
type
avrdude -c stk500v1 -b19200 -P /dev/ttyACM0 -p attiny44 -U flash:w:main.hex:i
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.02s
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 (2002 bytes):
Writing | ################################################## | 100% 2.88s
avrdude: 2002 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 2002 bytes
avrdude: reading on-chip flash data:
Reading | ################################################## | 100% 1.44s
avrdude: verifying ...
avrdude: 2002 bytes of flash verified
avrdude: safemode: Fuses OK (E:FF, H:DF, L:FF)
avrdude done. Thank you.
avrdude -c stk500v1 -b19200 -P /dev/ttyACM0 -p attiny44 -U hfuse:w:0xDF:m -U lfuse:w:0xFF:m
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.02s
avrdude: Device signature = 0x1e9207
avrdude: reading input file "0xDF"
avrdude: writing hfuse (1 bytes):
Writing | ################################################## | 100% 0.01s
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% 0.01s
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% 0.01s
avrdude: verifying ...
avrdude: 1 bytes of lfuse verified
avrdude: safemode: Fuses OK (E:FF, H:DF, L:FF)
avrdude done. Thank you.