Search found 16 matches

my compiler doesn want to compile this:
int16 Analog_0_Filtered;

printf(rsputc,"\r\n %lh",Analog_0_Filtered);

but this is accepted:

printf(rsputc,"\r\n %lu",Analog_0_Filtered);

how do i use it? is optimized code for using it automaticaly generated by PCWH ?

hi!

i want to double integrate acceleration values (255 - 768 for - 1g and +1 g, respecivley)to get the new position ...
how would i design an algorithm that calculates the new position?
i mean ...

You can do something like this and achieve resultes simular to an RC filter.

set_adc_channel(0);
GO_DONE=1;
Analog_0_Work+=Analog_0_RAW;
Analog_0_Fi ...

i'm trying to sample a MMA series accelerometer, it has a refresh freq @ ~ 1KHz, and i want to oversample it, cause its quite noisy.
but i'm hardly ablue to got even to nyquist!
You may be better ...

pfo,

Max speed rs232 at 115.2k =>

115200/10 = 11520 characters if you devide over two channels

5760 characters / channel if you use 2 bytes per sample

2880 samples/ channel are posib ...

i'm trying to sample a MMA series accelerometer, it has a refresh freq @ ~ 1KHz, and i want to oversample it, cause its quite noisy.
but i'm hardly ablue to got even to nyquist!

Is there a method of proving the the average computation takes realy place and that i sample ~ 10KHz (for both channels) and that the rs232 comm is thre real slow part of the while statement?

I gue ...

i now put a new variable in the update_running_average() function and after 1 minute its value is ~ 22K (-> 11K samples/channel/minute) ....

:((

who could i improve this? i nead at least ~ 5K ...

printf(bputc,"\r\n%lu",X.average);
printf(bputc," %lu",Y.average);
Let's assume that these statements together put out an
average of 10 characters per record. That assumes
4 charact ...

pfo,

Is it 70000 records or 70000 characters in 60 seconds ?

First check if the printf(%ul is the problem

just disable all AD parts and use:

printf("\r\n12345"); // for the first and
pri ...

pfo,

Is it 70000 records or 70000 characters in 60 seconds ?

First check if the printf(%ul is the problem

just disable all AD parts and use:

printf("\r\n12345"); // for the first and
pri ...

i capture the output to a file, and w/ w/o the file just contains ~ 70K entries after 60secs ... :(

it just gets slower when i use a larger buffer or use more printfs!

i used the code that's provided in the examples, but it doesn't seem to increase my overall performance ... that's my code:

#include <18F452.h>
#device ADC=10
#fuses HS,NOWDT,NOPROTECT,NOLV ...

hi!

my code looks like that:

while(1)
{
do stuff (); // it takes ~ 100uS to do it ...
printf("blah blah"); // rs232 @ 115kba ...