Author |
Message |
Topic: Clock is 4 times faster |
SpoonBilly
Replies: 7
Views: 9197
|
Forum: General CCS C Discussion Posted: Wed Jul 11, 2012 3:31 am Subject: Clock is 4 times faster |
I can live with the faster clock, but what can I do to replace delay_us()? |
Topic: Clock is 4 times faster |
SpoonBilly
Replies: 7
Views: 9197
|
Forum: General CCS C Discussion Posted: Tue Jul 10, 2012 5:47 am Subject: Clock is 4 times faster |
and I can't use delay_us(). Is this a related issue? |
Topic: Clock is 4 times faster |
SpoonBilly
Replies: 7
Views: 9197
|
Forum: General CCS C Discussion Posted: Tue Jul 10, 2012 1:41 am Subject: Clock is 4 times faster |
I am using PCWHD version 4.134 and MPLAB ICD3. What puzzles me is that the clock seems to work 4 times faster. Let say if I am using baudrate 9600, I can only receive what I want at the computer at ba ... |
Topic: PIC18F2553 and SD Card using ex_mmcsd.c |
SpoonBilly
Replies: 3
Views: 10189
|
Forum: General CCS C Discussion Posted: Tue Nov 09, 2010 7:08 pm Subject: Re: PIC18F2553 and SD Card using ex_mmcsd.c |
Hello, Please tell me what is your SPI clock. I use this code in a 18f4550 and I have some problem. Address in Winhex is at Offset column? TY.
Not sure what do you mean by SPI clock, I don't think ... |
Topic: dsPIC33F Timer Interrupt do not work for Prescaler 64 & |
SpoonBilly
Replies: 11
Views: 18694
|
Forum: General CCS C Discussion Posted: Fri Oct 08, 2010 7:18 am Subject: dsPIC33F Timer Interrupt do not work for Prescaler 64 & |
Your code sets PR1 to a constant value, this must be done only once. I don't see a reason, why this should be done inside the ISR, it's sufficient to set it with the initial setup_timer1(), as in my a ... |
Topic: dsPIC33F Timer Interrupt do not work for Prescaler 64 & |
SpoonBilly
Replies: 11
Views: 18694
|
Forum: General CCS C Discussion Posted: Fri Oct 08, 2010 1:02 am Subject: dsPIC33F Timer Interrupt do not work for Prescaler 64 & |
... If you rewrite TMR1 (e.g. with set_timer() ), the actual timer period is increased by the interrupt latency and processing time until set_timer is executed...
hm... well, anyway, I have been us ... |
Topic: dsPIC33F Timer Interrupt do not work for Prescaler 64 & |
SpoonBilly
Replies: 11
Views: 18694
|
Forum: General CCS C Discussion Posted: Wed Oct 06, 2010 10:09 pm Subject: dsPIC33F Timer Interrupt do not work for Prescaler 64 & |
...In most cases, even if a variable timer intervall is intended, one would write the preset register, because it's the only way to achieve a timer intervall that's exact to a clock tick.
I learnt ... |
Topic: dsPIC33F Timer Interrupt do not work for Prescaler 64 & |
SpoonBilly
Replies: 11
Views: 18694
|
Forum: General CCS C Discussion Posted: Wed Oct 06, 2010 8:08 pm Subject: dsPIC33F Timer Interrupt do not work for Prescaler 64 & |
Even if the advice given by FvM works perfectly, but being able to set_timer inside the timer interrupt ISR is crucial if the interrupt execution rate is not always constant.
After some trials and ... |
Topic: dsPIC33F Timer Interrupt do not work for Prescaler 64 & |
SpoonBilly
Replies: 11
Views: 18694
|
Forum: General CCS C Discussion Posted: Wed Oct 06, 2010 6:11 am Subject: dsPIC33F Timer Interrupt do not work for Prescaler 64 & |
You are using a wrong method to setup timer1, I think.
....
Thanks FvM.
The way I set the timer, it works fine for prescaler 1 and 8. Thanks for your advice. It is night over here, I will give ... |
Topic: dsPIC33F Timer Interrupt do not work for Prescaler 64 & |
SpoonBilly
Replies: 11
Views: 18694
|
Forum: General CCS C Discussion Posted: Wed Oct 06, 2010 1:00 am Subject: dsPIC33F Timer Interrupt do not work for Prescaler 64 & |
Why do you think, the timer interrupt doesn't work?
If you can afford a 500 us delay in the ISR, why don't you stay with slow PIC18.
I am new to dsPIC. Currently in the process of trying thi ... |
Topic: dsPIC33F Timer Interrupt do not work for Prescaler 64 & |
SpoonBilly
Replies: 11
Views: 18694
|
Forum: General CCS C Discussion Posted: Tue Oct 05, 2010 9:29 pm Subject: dsPIC33F Timer Interrupt do not work for Prescaler 64 & |
I am just started on dsPIC33F, work on PIC18F mostly in the past.
I was intended to run the dsPIC33FJ128GP306 at 40MIPS, that is 80MHz. It works fine for timer prescaler 1 and 8, but cant get the ... |
Topic: fat.c + mmcsd.c Working but Windows can't read the files |
SpoonBilly
Replies: 16
Views: 30615
|
Forum: General CCS C Discussion Posted: Thu Jun 03, 2010 2:57 am Subject: fat.c + mmcsd.c Working but Windows can't read the files |
But I did solved the problem of unable to read correctly from reserved sector... eventually... accidently...
I was so frustrated that at one point, using the modified mmcsd.c that I posted above, I ... |
Topic: fat.c + mmcsd.c Working but Windows can't read the files |
SpoonBilly
Replies: 16
Views: 30615
|
Forum: General CCS C Discussion Posted: Thu Jun 03, 2010 2:34 am Subject: fat.c + mmcsd.c Working but Windows can't read the files |
The problem with all of this is in the FAT library, basically in the function that is responsible for formatting the card: format(int32 mediaSize).
Thanks CoverUp. Spanish is a beautiful language ... |
Topic: fat.c + mmcsd.c Working but Windows can't read the files |
SpoonBilly
Replies: 16
Views: 30615
|
Forum: General CCS C Discussion Posted: Sat May 29, 2010 7:54 am Subject: fat.c + mmcsd.c Working but Windows can't read the files |
Solved!!
if any one want the solution, post but i'll explain it in spanish. sorry for that
Can you please share your code?
I'm working on similar thing using PIC18F2553.
http://www.ccsinfo.c ... |
Topic: fat.c / ex_fat.c: SD card, contents messed up. |
SpoonBilly
Replies: 7
Views: 9032
|
Forum: General CCS C Discussion Posted: Sat May 29, 2010 7:30 am Subject: Re: fat.c / ex_fat.c: SD card, contents messed up. |
Yet another datalogger-project where data is supposed to be stored in SD-card so it could be analysed in PC.
Working on similar thing. Use similar PIC too. I m using PIC18F2553.
http://www.ccsi ... |
|