Nugroho's blog.

Monday, May 25, 2015

Android Studio on My OS X Yosemite

Well, a picture is worth thousand words.

So, here the millions words for you, :)

Previously I went to Android website to install Eclipse with ADT. I installed this Android Studio instead; on my Macbook Air wit OS X Yosemite.

Oh yeah, you maybe encountered the error about JDK 7. I have to manually point to my JDK 7 installation.

My FreeBSD Installation LeftOver

Didn't really remember the chronology. It use Parallel Desktop. It use VirtualBox too.

Tak ada yang berbeda antara FreeBSD ini dengan yang lain, jika telah terbiasa dengan Linux atau Unix lain, bahkan Apple OS X, maka kita dapat melihat bahwa Beastie ini (nama logo BSD) sama dengan semua sistem itu.

The Rock Solid UNIX. :)

Friday, May 22, 2015

Buttered Black Coffee

Alfa suka teh mentega kambing gunung.

Penasaran, tapi gak suka teh, dan meski bukan yak, di sini ada banyak kambing, tapi gak ada mentega dari susu kambing.

Jadi, teh diganti kopi, dan mentega nak diganti dengan mentega roti.

Enak, bagiku, tapi tidak kusarankan tuk meniru.

Aku yakin po cha tidak seperti ini.

Thursday, May 21, 2015

Serial Communication at ATTiny13A (#3)

Since we need to set the baud rate. We have to use either manual delay or timer interrupt.

For now, I am trying using manual delay.

Check whether the Pin B0 is blinking using this code

.include "../tn13Adef.inc"

.cseg

.org 0x00

 ldi r16, 0b00000001

 out ddrb,r16

loop: 

 ldi r17,0xff

 ldi r18,0xff

 sbi PORTB,0

 rcall delay

 cbi PORTB,0

 rcall delay

 rjmp loop

delay:

 dec r17

 brne delay

 dec r18

 brne delay

ret

yup, it is

Serial Communication at ATTiny13A (#2)

To send bit data, we need 10 bit.

0(start)-8bit-1(stop) so r17 now has value 10

.include "../tn13Adef.inc" 

.cseg

.org 0x00

rjmp start 

start:

    ldi r16, 0x6D 

    ldi r17, 10 

shiftData:

    cpi r17, 10 

    breq low 

    cpi r17, 1

    breq high

    lsr r16

    brcs high

low:

    cbi PORTB, PB0 

    rjmp sent

high:

    sbi PORTB, PB0 

sent:

    dec r17 

    breq start 

    rjmp shiftData 

Nugrohos-MacBook-Air:serial nugroho$ avra -o serialTX.hex serialTX.s
AVRA: advanced AVR macro assembler Version 1.3.0 Build 1 (8 May 2010)
Copyright (C) 1998-2010. Check out README file for more info

   AVRA is an open source assembler for Atmel AVR microcontroller family
   It can be used as a replacement of 'AVRASM32.EXE' the original assembler
   shipped with AVR Studio. We do not guarantee full compatibility for avra.

   AVRA comes with NO WARRANTY, to the extent permitted by law.
   You may redistribute copies of avra under the terms
   of the GNU General Public License.
   For more information about these matters, see the files named COPYING.

Pass 1...
Pass 2...
done

Used memory blocks:
   Code      :  Start = 0x0000, End = 0x000E, Length = 0x000F

Assembly complete with no errors.
Segment usage:
   Code      :        15 words (30 bytes)
   Data      :         0 bytes
   EEPROM    :         0 bytes
Nugrohos-MacBook-Air:serial nugroho$ vavrdisasm serialTX.s.hex 
   0: c0 00       rjmp .+0 ; 0x2
   2: e6 0d       ldi R16, 0x6d
   4: e0 1a       ldi R17, 0x0a
   6: 30 1a       cpi R17, 0x0a
   8: f0 21       breq .+8 ; 0x12
   a: 30 10       cpi R17, 0x00
   c: f0 11       breq .+4 ; 0x12
   e: 95 06       lsr R16
  10: f0 10       brcs .+4 ; 0x16
  12: 98 c0       cbi $18, 0
  14: c0 01       rjmp .+2 ; 0x18
  16: 9a c0       sbi $18, 0
  18: 95 1a       dec R17
  1a: f3 99       breq .-26 ; 0x2
  1c: cf f4       rjmp .-24 ; 0x6
Nugrohos-MacBook-Air:serial nugroho$

Serial Communication ATTiny13A (#1)

ATTiny didn't come with TX/RX Pins, so I have to make it by myself.

Got it from http://www.bot-thoughts.com/2012/12/attiny-software-serial-tx-in-assembly.html

Slightly modify it because avra didn’t compile it original source

.include "../tn13Adef.inc" ; definitions for ATtiny13A

.cseg

.org 0x00

rjmp start ; executed after reset

start:

    ldi r16, 0x6D ; 'm' 

    ldi r17, 8 ; put 8 in counter register

txloop:

    lsr r16 ; shift off the next bit, LSB first

    brcs Send1 ; if it is 1 (C=1) then send 1

Send0:

    cbi PORTB, PB0 ; send a 0=low

    rjmp BitDone

Send1:

    sbi PORTB, PB0 ; send a 1=high

BitDone:

    dec r17 ; bitcnt--

    breq start ; if bitcnt == 0, start over

    rjmp txloop ; else do the next bit

Build, compile and upload it

Nugrohos-MacBook-Air:serial nugroho$ avra -o serialTX.hex serialTX.s 

AVRA: advanced AVR macro assembler Version 1.3.0 Build 1 (8 May 2010)
Copyright (C) 1998-2010. Check out README file for more info

   AVRA is an open source assembler for Atmel AVR microcontroller family
   It can be used as a replacement of 'AVRASM32.EXE' the original assembler
   shipped with AVR Studio. We do not guarantee full compatibility for avra.

   AVRA comes with NO WARRANTY, to the extent permitted by law.
   You may redistribute copies of avra under the terms
   of the GNU General Public License.
   For more information about these matters, see the files named COPYING.

Pass 1...
Pass 2...
done

Used memory blocks:
   Code      :  Start = 0x0000, End = 0x000A, Length = 0x000B

Assembly complete with no errors.
Segment usage:
   Code      :        11 words (22 bytes)
   Data      :         0 bytes
   EEPROM    :         0 bytes
Nugrohos-MacBook-Air:serial nugroho$ 

Nugrohos-MacBook-Air:serial nugroho$ ls
serialTX.s  serialTX.s.eep.hex serialTX.s.obj
serialTX.s.cof  serialTX.s.hex  serialTX1.s
Nugrohos-MacBook-Air:serial nugroho$ avrdude -p t13 -c usbasp -P usb -B4 -n

avrdude: set SCK frequency to 187500 Hz
avrdude: AVR device initialized and ready to accept instructions

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

avrdude: Device signature = 0x1e9007

avrdude: safemode: Fuses OK (H:FF, E:FF, L:6A)

avrdude done.  Thank you.

Nugrohos-MacBook-Air:serial nugroho$ avrdude -p t13 -c usbasp -P usb -B4 -U flash:w:serialTX.s.hex 

avrdude: set SCK frequency to 187500 Hz
avrdude: AVR device initialized and ready to accept instructions

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

avrdude: Device signature = 0x1e9007
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: set SCK frequency to 187500 Hz
avrdude: reading input file "serialTX.s.hex"
avrdude: input file serialTX.s.hex auto detected as Intel Hex
avrdude: writing flash (22 bytes):

Writing | ################################################## | 100% 0.02s

avrdude: 22 bytes of flash written
avrdude: verifying flash memory against serialTX.s.hex:
avrdude: load data flash data from input file serialTX.s.hex:
avrdude: input file serialTX.s.hex auto detected as Intel Hex
avrdude: input file serialTX.s.hex contains 22 bytes
avrdude: reading on-chip flash data:

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

avrdude: verifying ...
avrdude: 22 bytes of flash verified

avrdude: safemode: Fuses OK (H:FF, E:FF, L:6A)

avrdude done.  Thank you.

Nugrohos-MacBook-Air:serial nugroho$

I use USB-to-TTL, and after several fail attempt to compile and upload using usbasp, I’m getting annoyed, so I use hc-05 (a bluetooth module) to communicate with ATTiny. Just connect the RX pin to PB0.

Nugrohos-MacBook-Air:serial nugroho$ screen /dev/cu.HC-05-DevB

avr

modify it

note that