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  Topic: how to printf a floating number in the format of 00.00 ?
John_Lintern

Replies: 2
Views: 5586

PostForum: General CCS C Discussion   Posted: Tue Nov 29, 2005 5:13 am   Subject: how to printf a floating number in the format of 00.00 ?
How can I force the floating variables to be displayed in the format of say 00.00 for example ?

I am trying to send some variables down the RS232, some of which are integers and some of which are f ...
  Topic: How to load 6 variables into an array, but in order of size?
John_Lintern

Replies: 1
Views: 4570

PostForum: General CCS C Discussion   Posted: Tue Nov 15, 2005 9:35 am   Subject: How to load 6 variables into an array, but in order of size?
I have written some code which calculates six int16 values to be loaded into CCP1.

Say for example, my code calculates the following values...

A_RisingEdge=12500;
C_FallingEdge=31250;
B_Ris ...
  Topic: How to output 0�,120� & 240� phase shift from squarewave
John_Lintern

Replies: 2
Views: 4883

PostForum: General CCS C Discussion   Posted: Tue Nov 15, 2005 9:15 am   Subject: How to output 0�,120� & 240� phase shift from squarewave
Thanks Mark,

I have written code to calculate the CCP1 interrupts for the rising and falling edges on each phase.

Using a period which gives a Timer1 measurement of 37,500 (60ms period) and a de ...
  Topic: How to output 0�,120� & 240� phase shift from squarewave
John_Lintern

Replies: 2
Views: 4883

PostForum: General CCS C Discussion   Posted: Tue Nov 15, 2005 6:06 am   Subject: How to output 0�,120� & 240� phase shift from squarewave
Please help.... I'm so near yet so far !!

I have a squarewave input of a variable frequency from 15Hz to 30Hz.

I want 3 outputs to fire the gates of 3 triacs.

These outputs need to be phase s ...
  Topic: How to program PIC16F877A through rs232
John_Lintern

Replies: 9
Views: 25080

PostForum: General CCS C Discussion   Posted: Tue Oct 25, 2005 4:20 am   Subject: How to program PIC16F877A through rs232
I copied and pasted your code into my version of CCS and it compiled without any errors.

So it must be something to do with your version or installation of CCS ?

Are you able to get an update of ...
  Topic: How to program PIC16F877A through rs232
John_Lintern

Replies: 9
Views: 25080

PostForum: General CCS C Discussion   Posted: Mon Oct 24, 2005 2:12 am   Subject: How to program PIC16F877A through rs232
jump_to_isr is a function.

for some reason when you are compiling your code the function is not defined or recognised by the compiler.

what version of compiler are you using ?

in CCS go to 'H ...
  Topic: How to program PIC16F877A through rs232
John_Lintern

Replies: 9
Views: 25080

PostForum: General CCS C Discussion   Posted: Thu Oct 20, 2005 3:04 am   Subject: How to program PIC16F877A through rs232
I have recently used the bootloader that comes with the examples for the CCS compiler called "ex_bootloader.c"

Have you got this example ?

By pulling a pin low when you reset the PIC, the bootlo ...
  Topic: write_eeprom & read_eeprom does not work on PIC18F452?
John_Lintern

Replies: 3
Views: 6307

PostForum: General CCS C Discussion   Posted: Thu Sep 08, 2005 5:59 am   Subject: write_eeprom & read_eeprom does not work on PIC18F452?
Ive just found out.... I can read the eeprom but not write to it.

So its as if its protected ?

But I have set the config for it not to be write protected using the statement....

#FUSES NOWRTD ...
  Topic: write_eeprom & read_eeprom does not work on PIC18F452?
John_Lintern

Replies: 3
Views: 6307

PostForum: General CCS C Discussion   Posted: Thu Sep 08, 2005 5:47 am   Subject: write_eeprom & read_eeprom does not work on PIC18F452?
I am emulating a PIC18F452 on an ICE2000 (using the PCM18XH2 processor module).

However, the commands write_eeprom & read_eeprom do not to work ?

When I use a breakpoint on the statement... ...
  Topic: How to use output_bit or output_high with a variable
John_Lintern

Replies: 9
Views: 27208

PostForum: General CCS C Discussion   Posted: Wed Sep 07, 2005 8:03 am   Subject: How to use output_bit or output_high with a variable
I am trying to use the 'pin' parameter as a variable in the command output_bit.

e.g output_bit (pin, value)

I want the 'pin' parameter to be a variable so that the output bit depends on the val ...
  Topic: ex_bootloader - problem using interrupts in application prog
John_Lintern

Replies: 22
Views: 24030

PostForum: General CCS C Discussion   Posted: Tue Sep 06, 2005 9:12 am   Subject: ex_bootloader - problem using interrupts in application prog
I have blown a PIC18F452 with the ex_bootloader.c example program supplied with CCS.

This works fine and I have successfully downloaded a simple application program via the RS232 which flashes an L ...
  Topic: Bootloader or In Circuit Serial Programming (ICSP) ?
John_Lintern

Replies: 3
Views: 4881

PostForum: General CCS C Discussion   Posted: Thu Aug 25, 2005 2:56 am   Subject: Bootloader or In Circuit Serial Programming (ICSP) ?
I am using a PIC16F877A which I need to reprogram whilst the PIC remains in circuit.

Which would be the best method to use, the bootloader method or the ICSP method ?

I want to connect my circui ...
  Topic: How can I store and use an array in EEPROM ?
John_Lintern

Replies: 4
Views: 6450

PostForum: General CCS C Discussion   Posted: Tue May 24, 2005 8:05 am   Subject: How can I store and use an array in EEPROM ?
Store the arrays in ROM.
Copy an array into RAM buffer and pass a pointer to your function.

Thanks Mark,

I'm trying to do what you suggested.

I've now stored all my arrays of data in ROM (pr ...
  Topic: How can I store and use an array in EEPROM ?
John_Lintern

Replies: 4
Views: 6450

PostForum: General CCS C Discussion   Posted: Tue May 24, 2005 5:47 am   Subject: How can I store and use an array in EEPROM ?
I've been using arrays which I have been storing RAM.

Below is an example of how I initialised my arrays in RAM...


int ShiftSchedCold_1to2[2][4] = {{20,20,52,52} ...
  Topic: Not enough RAM for a 368byte PIC, but ok for a 192byte PIC ?
John_Lintern

Replies: 2
Views: 5615

PostForum: General CCS C Discussion   Posted: Fri May 13, 2005 7:01 am   Subject: Not enough RAM for a 368byte PIC, but ok for a 192byte PIC ?
I am using,

- a PIC16F874A which has 192 bytes of RAM
- a PIC16F877A which has 368 bytes of RAM

The PIC16F877A is the same as the PIC16F874A but has twice the amount of ROM and EEPROM and almos ...
 
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