error on schematic and PCB

[casainho]

Hello :-)

There is one error on schematic and PCB - pin number 10 of DataLacthes
ICs should be connected to Vcc and not GND. DataLacthes do not work.

This is my fault as I made the first working prototype however I
didn't copy correctly the schematic.

I thought I already did tested the DataLaches ICs on this hardware,
but not, I just did tested on the first prototype.

I will update the wiki page about hardware V1.0 with problems of
actual schematic and PCB.

I were on a Demoparty, everyone enjoyed to know about this hardware...
however just 2 guys there works with hardware, with Arduino. I hope to
present Bicycle LED POV with a simple Demo on next Demoparty :-)

[Jorge Pinto aka Casainho]

> I were on a Demoparty, everyone enjoyed to know about this hardware...
> however just 2 guys there works with hardware, with Arduino. I hope to
> present Bicycle LED POV with a simple Demo on next Demoparty :-)

On Demoparty I were talking with a friend that have experiency on 8 bits
MCUs firmware, he tolds me that what we are calling "API" should instead
be called as "Comunications protocol"...

[casainho]

Hello :-)

I would like to report that I did tested the DataLacthes and the LEDs,
they are working - I did changed pin 10 of DataLacthes, wiring them to
Vcc.

I also did tested button of bootloader.

I didn't test sensor hall effect... hope to do that soon.

I were testing the DataFlash memory, I have some problem with
WriteByte function. Erase and Read memory looks like to be working
ok... I will figure out the problem on next days.

I am using the LEDs to make a kind of printf th them ;-) to do use for
debug :-)

[casainho]

> I didn't test sensor hall effect... hope to do that soon.

There is some problems with sensor hall effect - I were seeing the
data signal with oscilloscope and without any magnet near sensor, it
sends random signals as if it were detecting any magnet :-(

I tried to lower the pullup resistor, from 51k to 22k - didn't result
in nothing. I also tried to put a 100nF capacitor in parallel to
pullup resistor, signal get less square but not good :-( -- I think
that with a simple RC filter signal can get good however we can lost
frequency of reaction to magnet, like being slow to detect magnet :-(

Well, I did test before the sensor magnet on other prototype board, I
didn't had this problems... maybe the sensor is having bad behavior -
I will substitute it next time and try to find why...

Sensor hall effect is very near of crystal oscillator, could be
because of that? - I did tried to switch MCU oscillator from crystal
oscillator to internal RC oscillator, but I need to try do it again.

DataFlash memory: I saw that memory gives the information about a bad
write/erase - I will put that information as return value of Erase and
WriteByte functions, I will try to use that information to understand
if memory is being write or not...