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Messages - octal

48
General discussion / Re: Looking for Dangerous Soldering Iron driver V1.5
[quote author="ian"]You can always send the gerber files to a local PCB place too! But you'll probably end up with a bunch of them.[/quote]

PCB makers at France ???? forgot about them, for suc a PCB they will easily ask arround 200€ (I'm not kidding). Nobody I know is making PCBs here in France (unless you make 1000 or more and you ask for part assembly, you can't have reasonable prices).

I just wanted to give it a try and offer it (completely assembled) to a friend. For me, I plan to change the mcu to low cost PIC18F2X/4XK50 and add a graphical disp (a nokia cheap disp) to provide a better GUI. USB will be used to log and communicate data (and flash update) to PC.
49
General discussion / Looking for Dangerous Soldering Iron driver V1.5
Hello,
I need to buy a PCB of Dangerous Soldering Iron driver V1.5

SeeedStudio sells them, but shipping to France takes too much time. Can anyone living in Europe (or USA) sell me his own (I need to have it at hand before the end of next week i.e. March 23th), or point me to a reseller in europe?

Regards
53
General discussion / a mikroelektronika EasyARM board at 79 euros only
I'm selling my new boxed EasyARM board from MikroElektronika with an additional LPC2214 module. The board has an onboard programmer, but you can still use any JTAG (JLink, ULink2, ...) to program and debug using your standard dev tools.
The price for both is only 79 euros.

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54
General discussion / Re: 5V I2C with dsPIC33F
Hi Sjaak,
this was the main concern of my question. Does the 5V slave work with dsPIC? in theory, since my pullups are connected to the 5V rail, it should work, but  I have read on some forums that it doesn't.
55
General discussion / 5V I2C with dsPIC33F
on Microchip dsPIC33FJ32MC204 i2c pins are 5V tolerant. Can I use I2C bus with 5V devices without level translation? did you tested that?
57
General discussion / Re: Can microprocessors compile their code into ram?
[quote author="Graham242"]No app note that I'm aware of, but look into the memory organisation for PIC32 to see how things are laid out.
[/quote]

I used this trick sometimes ago to be able to toggle a pin and do some processing at extreme high speed on PIC32. Functions need to be attributed using "__longramfunc__" for function that you need to call from anywhere in your code (i.e. from functions residing in RAM or Flash), and with "__ramfunc__" for function that need to be called only from other RAM located functions.

Code: [Select]
// function in RAM - callable from other RAM or Flash located functions
int __longramfunc__ __attribute__((noinline)) myRamfunct(int pDutty, int pFreq, int pOrder)
{
...
}

// function in ram can only be called from another RAM function residing in [b]same segment[/b]
int __ramfunc__ __attribute__((noinline)) myRamFunct2(int pRec, int pDataSize)
{
}

so if you want that your entire program runs from RAM, MAIN() function cannot be located in ram, you just need to do something like:

Code: [Select]

int __ramfunc__ __attribute__((noinline)) myRamFunct1(int pRec, int pDataSize)
{
}

int __ramfunc__ __attribute__((noinline)) myRamFunct2(int pRec, int pDataSize)
{
}

int __ramfunc__ __attribute__((noinline)) myRamFunct3(int pRec, int pDataSize)
{
}

int __longramfunc__ __attribute__((noinline)) ram_main()
{
  //in this function, call your other functions attributed with "__ramfunc__"
  myRamFunct1(...);
  myRamFunct1(...);
  myRamFunct1(...);
.. do all your processing ;)
}

// this is original main() in flash
int main()
{
  ram_main(); // call to ram based main
}
60
General discussion / Re: ST Link and VirtualBox.
I dont really understand what you mean KIBO, sorry :(
I simply said that my PC is under UBUNTU 12.04 -X86, and that I'm running a Win7-X64 inside VirtualBox. I never got problems with ST-Link.

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