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void pwmTask(unsigned int pulse_width,unsigned int period)
{
unsigned int time_on = pulse_width;
unsigned int time_off = period - pulse_width;
while(1)
{
pwm_output = 1; //pwm_output = signa ...

use a opamp in comparator mode...
for 3.5 v it should give u low voltage
and for high 4v it shoudl give u high logic at the output...

LMC7101 is best for this type of application

Assign this signal to interrupt pin...

use a timer according to the speed of the signal....

so when ever signal transit from high to low, ISR will set the flag to low....

1. with the help of ...

thank you every one for your help...

lots of my doubts are clear now..

i have chnged the ckt and now using a Port D for data lines...

cheers,
tom

in help file it is mention that

"The SIOW.EXE program included in the program directory "

but in my PICC folder there is no program directory..

can u put some focus..

or any othe ...

ALL,
System is using a 30Mhz OSC in EC mode. the output of PIC, OSC2(FoSC/4 =7.5Mhz) is feed to pheripheral chip.
on based on OSC2 output i have to generate some control signals..

which is the ...

data lines are split between different ports...
like:
D4-D0 RA4-RA0(PortA)
D7-D5 RB3-RB1(PortB)

i tried to use union and #define

but still it not working

cheers,
tom

#define DATA ...

to write a 8 bit data on D7-D0, i am using following code...
but for a command "output_low(DATA_BIT.D
while (! input(uP_CLK)); //wait till CLK is low
//write 8bit control byt ...

thank you for reply..
can u suggest some other method..

.................
this is the list version

MPLAB 7.40.00.00 Certified
ICDDB 7.30.00.00 n\a
MasterDB 2 ...

Hello,
Try Br(at)y++ Terminal.
You can download it from:
hxxp://www.hwgroup.cz/supp_rem_serial_en.html

best regards.

PIC is sampling at 20 KSPS a ADC signal (i.e volage i/p) in continous mode.

In every 200ms cycle, PIC is storing the maximum value and passing it on I2C bus.

but sometime PIC is not able to cap ...

Dear,
Can anyone provide me some suggestion or example to build a 8-bit uProcessor interface..

System is using PIC18F4320 and 8-bit uP interface(pheripheral chip).

Rolling Eyes

TIA<
TOM

Hello Experts,
Finally I found out the that I have to do I2C bus recovery.
It happens when master fails a read operation in a slave...

solution:
reset the slave device or do a bus recovery seq ...

i guess you need to do following change...
and may be you need to remove a while loop of BF in write_I2C...

unsigned char read_i2c(void)
{
if(PIC_SSPSTAT & PIC ...

I mean the due the improper software, ACK is not being generated by Master.

void write_i2c(unsigned char transmit_byte)
{
unsigned char write_collision = 1;
if(PIC_PIR1 &am ...