PI CHIP

[maxfly]

Hi moods,

Just wondering if you are able to supply one of your latest version chips pre-programmed, or even better some sort of kit? I'm only just starting into this type of work but am willing to give it a go! The capability is amazing.

Cheers

[moscadondres]

6666 and moodz,
The post is #136 with:ground balance,descrim balance in(UNIPI DS V230)where ican connect these 2 to UNIPI V3 Universal,sorry and thank you.

[moscadondres]

6666 and moodz,
Thank you but how connect the post#133:THAT510 with UNIPI V3 universal,may be is not possible.

[6666]

Sorry I thought he was asking about post #144

[moodz]

The front end posted here will work ....

http://www.geotech1.com/forums/showpost.php?p=139473&postcount=133

However this if for experimenters ... it is not a paint by numbers instruction. It has been tested but needs some finessing to reach optimal performance. You should be able to see where to connect the TX and sample pulse.

moodz.

[6666]

moscadondres

I think I can see what you are asking from post #144
the audio pin seems to be pin33, you can have up to 4 samples from pins 22,18,22,19
not sure what Moodz is using for the TX, best for him to answer that

[moscadondres]

hdphilip,
Thank you for reply,i don't work with 4011 and 4012 chip because i don't know where i can connect :sample,Tx,signal out and discrim balance of post 133;regards.

[hdphilip]

moscadondres,

i've been working with the 4012 chip with the feild test unit, i will say i've been impressed with moodz software for that chip, i did breadboard the 4011 chip, if your going to use the 4011 chip, let me know, and i'll see if i can figure it out for you. from what have.

Philip

[moscadondres]

Hi Moods,
i would like know how and where i can connect:sample 1 pulse;Tx pulse;signal out;discrim balance control in of your post:133 called field test unit n001 at these post:144;thank you for reply.

[hdphilip]

CPU speed

moodz,

I tried the 20MIPS code, i saw that you put 20MIPS on the second line to warn us on the slower speed

here's what i noticed (this was from my breadboard setup)

I also measured about 100 ma with the LCD display on.
At 5 volts worked fine.
The "update time" on the display seemed half as fast. (harder to read)

The 20MIPS software would be an excellent choice in troubleshooting,
when I programed it on my pickit 3, because of the lower operating current, i found the
pickit 3 was able to power the CPU and LCD . which the 40 MIPS software couldn't.

I'm using the 30 MIPS CPU.

we could use a switching regulator for the digital +5 volts, from our battery pack to help the overall efficiency.

faster the better!!

I reloaded the v300, the cpu is purring along at 5.2v , waiting for a PCB, when I get the PCB made i'll try the menu/ timing functions

Philip

[moodz]

Here is a version of the 4011 code running at 20 MIPS instead of 40 MIPS .... the internal cpu clock is now 80 Mhz instead of 160 Mhz and well within the 120 Mhz manufacturer spec. I have not extensively checked the menus and timings so any feedback is welcome.

The current draw is now 115 mA ....

moodz.

UNIPI_4011_20MIPS_hex.zip

[moodz]

hello Moodz,

thanks for the update, (i was inputing the design into eagle)

When i was breadboarding the CPU and display i noticed the LCD was inter-tied with the icsp witch was also sending the menu too.

One important item i noticed, after about ten minutes, the display would lock up, sense we're overclocking these chips, i increased the voltage to about 5.2 volts, which seemed to do the trick, the current draw was about 200ma, with the LCD on.

I see you added some buffer stages for the sample/pwm outputs, is your thinking along the lines of to provide some sort of isolation, and to eliminate the need for the mosfet drivers?

If you were to use the ADC on on the SPI line, would that free up some CPU overhead, and would it be best to mount ADC on the front end board?

I did not need to increase the voltage to overclock these chips however any noise on the +5 logic supply will cause a lock up ..... could depend on your chip production version also .. they vary slightly. I will look into running the chip at half the current clock speed.

moodz

[moodz]

Amazing Moodz
where did you get the Evaluation Board
cannot quite read the writing ?

cheers

My evaluation board is one of the chips soldered to an SSOP chip carrier

The factory evaluation board is quite pricey. ( about $160 I think )

moodz.

[hdphilip]

hello Moodz,

thanks for the update, (i was inputing the design into eagle)

When i was breadboarding the CPU and display i noticed the LCD was inter-tied with the icsp witch was also sending the menu too.

One important item i noticed, after about ten minutes, the display would lock up, sense we're overclocking these chips, i increased the voltage to about 5.2 volts, which seemed to do the trick, the current draw was about 200ma, with the LCD on.

I see you added some buffer stages for the sample/pwm outputs, is your thinking along the lines of to provide some sort of isolation, and to eliminate the need for the mosfet drivers?

If you were to use the ADC on on the SPI line, would that free up some CPU overhead, and would it be best to mount ADC on the front end board?

[6666]

Amazing Moodz
where did you get the Evaluation Board
cannot quite read the writing ?

cheers