Search found 19 matches

it also means you are moving away from this forum's target audience. As this forum is also hardware related we can discuss your question here but please be aware that we are getting off topic and tha ...

Hi !!
what is your appinion about the PIC32MX795F512 processor
I found a board that has what i need

http://www.digilentinc.com/Products/Detail.cfm?NavPath=2,892,894&Prod=CHIPKIT-MAX32

my c ...

Hi guys,

I will need your wisdom on something.
I decided to change the mcu to something faster,
I'm looking for a microcontroller with 24 MIPS, at least 30 i/o
for general use, usb compatible.A ...

I'm screwed, I'm stuck with software spi.

With a parallel ADC i'll get 700KHz

it's enough for a CMOS but it won't do it for CCD

Thank you lads you have been very helpful
Best wishes

#1 Just send as two bytes.

Code:

int16 rval send_16(int16 val_to_send)
{
int8 reply

thank you Ttelmah,
I'm trying out the first program, although I get an error at spi_write(), the ...

I need some more of your precious help..
I want to program a hardware SPI for 16 bits frame, I'm using a 12-bit ADC
which has 4-bit leading zeros and 12-bit data.

Any example or tutorial you can ...

FAST_IO doubled the speed of the commands, thanks guys

Nice Ttelmah , i'll try it tomorrow

Thank you everyone,

After a three hour reading i understand why it can't go faster.
I will change my design

Don't confuse MIPS and MHz. The PIC processor needs 4 clock cycles to execute 1 instruction. So, as Ttelmah already pointed out, when running at 48MHz the processor can execute 12 instructions every u ...

when i say 2 cycles i mean to do
output_low(PIN_C0);
output_high(PIN_C0);

I tried the most simple program.

#include <18f4550.h>
#include <main.h>

#use delay(clock=48000000)
void main() {
int c;
int i;
unsigned int16 res; ...

Thank you for the response Ttelmah.
I'll try it out

I commented out printf and did not work, on every loop adc_result function is called and gives 16 pulses, then gives a print and starts another loop.

In which case you need to change your divider to CPUDIV2 to give 32MHz. With CPUDIV1 which you show, you will be running at 48MHz.

I know but with CPUDIV1 i get 6 MHz CPU speed and with CPUDIV2 ...