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i want to produce a variable delay by using timer1 (i can't use delay_us)
i need to adjust the delay between about 20us and 500us

what i did is to preset timer1 with (0xFFFF-mydelay) and then let ...

ok thanks very much it was a stack overflow!!

hi
i have a program that works quite well. but sometimes it resets the processor (not regularly). i don't use the wdt(!) and the mclr pin is high all the time.
what else can cause a reset???

i ...

what kind of lcd controller do you use?

i also used an lcd controller with spi and you need to consider a lot of things...

you can also set a pin at the beginning of your function and clear it at the end.
then you can measure the duration with a scope.
to find out how long it takes to set a pin should be no problem.

i used a EA DIP204B-4NLW (blue/white)
with a KS 0073 controller on it. you can interface the LCD with SPI. i used a 16f876 to do that and it works fine

what do you think about twisted pair connections?

1) 16f876
2) pcm 3.206
3) that's the max i'll ever use with this program (i took 15 just to be sure that data_name is not longer than 20 bytes)

is the constant struct array battery_dat{"data.........9","mAh",9,1,900,9},
char to_print[20];

typedef struct {
char data_name[20];
char unit ...

i have 20 steppermotor controllers in a scanner with a pic on each controller.
i thought about i2c but i worry if the distance is already too long.

what is a good way to communicate with 20 pics? I need only one master and it hasn't to be fast. the distance between the first and the last pic ist between 0.5 an 1 meter

Try this... (you have to put a char in the rx_buffer)

int result;
char rx_buffer[2];
rx_buffer[0]='5';
rx_buffer[1]='1';
result=atoi(rx_buffer); //result sh ...

is it possible to implement 2 software i2c and 1 hardward spi in a 16f876?

ok thanks, i'm gonna try that

no, i'm trying to build an equipment that can measure the available capacity of a battery and find out how long the battery will work (approximately) in a laptop if it is full charged.