My minty progress

by **terpDriver** » Mon May 30, 2005 3:48 pm

This is what I've got so far: bootloader programmed in, firmware programmed in with TinyBldr, unable to talk with hyperterminal.

by **ryder1650** » Mon May 30, 2005 4:40 pm

When I was at your stage I encountered 2 problems.

1. tinybld said it loaded the firmware completely, but when I checked what was on the chip using ICSP, I found that the last few lines of the HEX code were not programmed on. That happened when I was using tinybld173, tinybld18 worked fine.

2. I was not getting a good connection with the battery. However, it seems that you have soldered your leads on so that is likely not the problem. Also make sure your (-) and (+) are in the right holes (im sure they are correct, but it doesn't hurt to check).

by **terpDriver** » Mon May 30, 2005 5:02 pm

Thanks for the tips! Without changing anything I can now get output in TeraTerm (a better hyperterminal program). I started with the board unplugged and turned off, then plugged the board in, opened teraterm at 115200, and turned the minty on.

Code: Select all: Minty MP3! v1 3/25/2004 Resetting Card.. found CF card... Identifying CF.. set drive command id hhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhh

by **ryder1650** » Mon May 30, 2005 5:34 pm

sweet

by **adafruit** » Mon May 30, 2005 7:04 pm

terpDriver wrote:Thanks for the tips! Without changing anything I can now get output in TeraTerm (a better hyperterminal program). I started with the board unplugged and turned off, then plugged the board in, opened teraterm at 115200, and turned the minty on.
Code: Select all
Minty MP3! v1 3/25/2004 Resetting Card.. found CF card... Identifying CF.. set drive command id hhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhh

woah, weird output. looks like you're making a lot of progress tho!

by **terpDriver** » Mon May 30, 2005 9:02 pm

Yay! I'm getting there. Now I'm trying to get MintyComm to work.

Code: Select all: >java MintyComm Exception in thread "main" java.lang.NoClassDefFoundError: MintyComm

I had a classpath problem. I fixed it by adding an environment variable called CLASSPATH and defined it as "C:\Program Files\Java\jdk1.5.0_03\lib\comm.jar;."

but at least i'm getting this far:

Code: Select all: Minty MP3! v1 3/25/2004 Resetting Card.. found CF card... Identifying CF.. set drive command id „Šê@ õ 101820D0504O0228HAD 2.13SanDisk SDCFB-32 ê õõxx# bytes/ sectors: 510 # sectors/cluster: 4 # reserved sectors: 0 # FATs: 2 # / entries: 510 FAT starts at sector 0x0021 / starts at sector 0x0000009b STA Reset Found STA013 setting volume to -0 dB waiting for char 0d mp3>

by **terpDriver** » Wed Jun 01, 2005 3:02 pm

So I got one minty to work. I just need to finish up by putting on a few more components for the LIon charger and the boost supply, in case i want to run off AA's. I'm still debugging minty number two, which is still dragging at the bootloader/firmware stage.

The sound I'm getting out is pretty bass heavy (not distorted though), the highs are not very present if at all, and I was wondering what values the other few minty makers out there are using for their audio output stage, and how they would describe their sound quality. I'm using:
C14, C15, C36, C40 = 33uF
R4, R5 = 10 KOhm
R6, R7 = 10 Ohm
I'm out of 33uF caps so when I get to that point with minty number two I'm going to have to order more caps for that stage anyway.

by **ryder1650** » Wed Jun 01, 2005 3:33 pm

congrats on getting it to work!

by **ryder1650** » Wed Jun 01, 2005 4:24 pm

I am getting to the point where it says resetting card, but then it spews out garbage. How did you get it to move past that point?

by **terpDriver** » Wed Jun 01, 2005 8:09 pm

At that point I pretty much went full speed ahead and implemented the MP3 decoder/DAC section and attached the compact flash socket. I think I was getting garbage output because those systems weren't in place yet.

by **ryder1650** » Wed Jun 01, 2005 8:36 pm

I have everything on and the terminal software gets stuck on identifying card...when i do not have a card in it everything else goes through properly.

by **ryder1650** » Wed Jun 01, 2005 10:02 pm

So, I tinkered with the CF pins (even had to run jumpers from 2 messed up pads :cry:

) and now I have a homemade mp3 player!

by **terpDriver** » Thu Jun 02, 2005 12:11 pm

Congrats!

My minty progress

My minty progress

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