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Messages - Markus Gritsch

46
Project logs / Re: EZ-USB-FX1 based PSOC 3/5 programmer
* Do you know the difference between the 'ftk_5_simfw.hex' and the 'fx2lp_fw.hex' firmware?  Can your board also be used as a programmer using the 'fx2lp_fw.hex' firmware?

* How did you know which pins of the EZ-USB chip are used as SWDIO, SWDCK, and /XRES pins?
48
Project logs / Re: Loki: A new PSoC based development board
[quote author="nickjohnson"]
I've been conversing with Cypress about this. Apparently there's no way to do this without cutting tracks, because the Pioneer board has the programmer PSoC attached directly to the target device.
[/quote]

If I get the schematic right, I think one has just to desolder the zero ohm resistors R32, R33, and R34.

[quote author="nickjohnson"]
The PSoC programmer elsewhere on DP is worth a look as a cheaper alternative to the miniprog3, though.
[/quote]

As I already have a Pioneer Kit, I would rather like to use it as my general programmer.  So no restrictions otherwise on the KitProg?
49
Project logs / Re: Loki: A new PSoC based development board
Would it be possible to use the KitProg included on the Pionieer board to program an external PSoC 5 chip?  Or is the KitProg locked to only program PSoC 4 chips?  At $89.00 plus shipping the MiniProg3 is a bit expensive.
50
Project logs / Re: Pitch Shifter (Transposer)
IIRC I used some optimization value >1 in the firmware to get enough speed on the PIC24F.  Today I would use a small PIC32MX1, which was not available back then.
51
Project logs / Re: Pitch Shifter (Transposer)
Hi Mats, I really would like to see it being available as a kit!  You totally have my blessing.  And I am sure the design could be improved a lot :)
52
Project logs / Re: Pitch Shifter (Transposer)
I didn't build the pitch shifter to sell it.  However, the schematic and firmware are available, so everyone with a little experience in electronics should be able to build you one.
54
Project logs / Re: DaTajm - A sneak preview of my new homemade wristwatch
Yes, I use the Lauchpad as programmer/debugger for my projects.  Simply connect the TEST and RST pins to the chip you want to program.

I use the 32 kHz quarz for the timekeeping ISR (watchdog timer) and run from the internal 16 MHz FRC oscillator when waking up. The wakeup time is 1 us.
55
Project logs / Re: DaTajm - A sneak preview of my new homemade wristwatch
[quote author="matseng"]Now the watch should last two months on "standby" and likely a few weeks in normal usage. With cap sensing the battery might only last a few days if im unlucky.[/quote]
Although I like the PIC and especially the PIC32 chips a lot for most of my projects, I regularly turn to the MSP430 value line chips when doing really low power stuff.

The alarm clock I made two years ago [1] awakes 64 times per second, does a little houskeeping and time counting, and draws just 2 uA.  When waking up less often, the power consumption can be reduced further.

Maybe you want to consider using an MSP430 value line chip [2] for this project?  The programmer/debugger [3] costs just $9.99, and the Eclipse based IDE [4] is free for the max. flash size of 16 kB of these chips.

Cheers,
Markus

[1] viewtopic.php?t=2126
[2] http://www.ti.com/lsds/ti/microcontroll ... rview.page
[3] http://www.ti.com/tool/msp-exp430g2
[4] http://www.ti.com/tool/ccstudio-msp430
58
Project logs / Re: Pitch Shifter (Transposer)
Use some FAT library (e.g. Chans "FatFS" or Microchips "MDD File System") and instead of reading the data from the ADC use the chosen library API to read the samples from a WAV file on the SD card.

My code varies the input sampling speed and has a constand output sampling speed.  With the data coming from an SD card, it has to be the other way around.
59
Project logs / Re: Pitch Shifter (Transposer)
[quote author="manmachine"]
Could this project be modified ,to take audio file in an SDcard as input, instead of actual audio input signal,thus avoiding input sampling ?
manmachine.[/quote]
Yes.
[quote author="manmachine"]
Also,  How far AVR chips  are suitable to do job like this?  Your thoughts please.
[/quote]
I don't think an Arduino ist fast enouth to do this at a high sample rate.

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