Search found 17 matches

This entry from the FAQ describes how to save larger variables (such as floats) to the EEPROM:

http://ccsinfo.com/faq.php?page=write_eeprom_not_byte

To make the logic easier, I would make a small helper routine that simply compares two times, taking into account that hours are more significant than minutes. The example below returns +1 if A>B, ...

Something like this should do the trick:

#define MINIMUM_READING 0.204
#define MAXIMUM_READING 1.02
#define MAXIMUM_DISTANCE 2.0

...

fInches = MAXIMUM_DISTANCE * (fVolts - MINIMUM_R ...

I don't think there is any way to do this sort of thing directly within C. As an alternative, you could do the calculations at runtime (perhaps at startup), storing the results in RAM. (It looks to ...

You've declared rx_pw as a char pointer, but you haven't allocated any storage for it. The call to gets() is likely stomping on some random location in RAM. I would change its declaration to somethi ...

I see two problems:

1. The reason 300 "overflows" back to 44 is that "atoi()" only returns an 8 bit value. Even though you are assigning it to 16 bit Ti_Result, it has already overflowed. Use the ...

Glad to hear the circuit is working now.

I don't think the problem you are seeing has anything to do with "Latch up". Here's a quick explanation of what's happening:

A PIC's I/O pins can have o ...

is also pulled up w/ a 10K. The Fan operates at 5V, 400mA, and the PIC is at 3.3V. The fan is on with output high.

It sounds to me that the problem is with your 10K pull up resistor: When the PIC i ...

You can definitely play simple notes with a PIC. One of the simplest ways is to connect a Piezo speaker to the PWM output of the PIC. You can vary the PWM frequency to get a good range of notes. (T ...

or is there "stuff" that CCS hides ? I thought the LST included everything .

Yes, by default, CCS hides the code for a lot of their 'library' functions. Take a look at the #list & #nolist dire ...

Radio Shack used to sell a great book called "Enercell Battery Guidebook". It has sections for virtually every standard type of battery (AA, D, C, 9V, 'coin cells', lithium, etc). Within each sectio ...

The biggest thing that strikes me is the call to

Ch = fgetc(SLOW_DEV);

within the RTCC isr. The call to kbhit() should be very fast, and should not take significant time. However ...

Oops... I miscalculated the watchdog timeout. It's not 128 ms, but 128 x Watchdog Period, Twdt. According to the datasheet, this can be as low as 7ms. At that period, the timeout is 7ms * 128 count ...

It looks to me like the watchdog is timing out (and restarting your program) during the 1 second "delay_ms(1000)" calls. (The watchdog is configured for 128ms timeout.)

Try changing your #use de ...

Heres a link to Atmel's AT90SC3232CS page. It has the datasheet, and other good info:

On Edit: Ooops... I just noticed that even Atmel's datasheet doesn't seem to have the pin diagrams. I guess I ...