Seong Hee Kim

Seonghee Kim

12. OUTPUT DEVICES

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Week12

Assignments

-group assignment

measure the power consumption of an output device

-individual assignment

add an output device to a microcontroller board you've designed, and program it to do something

Hardware and Softwares used

-Roland SRM-20

-arduino IDE
-fab module
-eagle cad

Outcome

Did step by step debuging. Run LCD board.

LCD output device

Coding Arduino

Before start my own board, I tested LCD at arduino board. It works well.

I grab LCD arduino code from exapmles.

Coding Hello.LCD Board

-I only need to change the pin number. I refer the board images from hellolcd board, but I was not able to find the pin no originally from. I could not find it from pin configuration of attiny44 datasheet.

Debugging
When I uploaded the porgram it did not work. I could not bootload nor upload by programmer at arduino IDE. So I tired to solve the problem.
-1st I tired another fabISP(more than 2)but not working.
-2nd I changed my voltage regulator. (the voltage regulator got the power form worng direction from my fabISP because I did not take off the jumper of ISP so it might burn.)
-3rd, I put 0 resistor instead of voltage regulator but still not working.
-4th, I check the continuety and voltage agian with multimeter(continuety was ik and voltage was 5.01 voltage from vcc to GND)
-5th, I wonder again if my ISP is ok so I uploaded progrma to my distance input board from lastweek, it works well so it is not the ISP problem.
-6th, I took off Attiny44 from the board and resoldered. not working.
-7th, I resoldered ISP pin, and the path took off!!!!!!!
-8th, I milled the board again, take off all the component from old board to save them and put it to new board again. However not working.
-9th, I changed resonater, tried bootload, not working, changed resistors, tried bootload, not working, changed the capacitor, tired the bootloader, still not working and I learnt that the resonator, resistors and the capacitor do not affect to bootloading so it should not be the problem.
-And finally... I check the Youngsik's site, and he showed how to solve the same problem. He reinstalled the fabISP with the zadig program!! thanks to him.

Problem Solved!

I don't know the reason but when fabISP connect the board with attiny44(same problem with helloecho board) My computer didnot recognise USBtinySPI, so I reinstalled using zadig and it worked!!