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avarachan
Joined: 24 Sep 2009
Posts: 3
Location: Buffalo, NY
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| How to Print binary as decimal fraction |
 Posted: Thu Sep 24, 2009 6:49 pm |
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Hi all,
I'm working on PIC18f2620 + CS5463 (power monitor). I saw some posts regarding CS5463 spi. In CS5463 registers, some values are 0<Vrms(for eg.)<1. These are 24 bit registers. I can read these values well and good into the processor. I'm using pic18f2620 with MPLAB IDE +CCS version 4.3.
Is there a way I can use some printf method to get the decimal fraction? or some usable format? Or should I do bit by bit 2^i thing?
To be more clear, lets say I read 0xC00000 from Vrms register. This is 0b110000000000000000000000. I need to convert it to 0.75.
Appreciate any help in advance.
Avarachan |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Thu Sep 24, 2009 7:19 pm |
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The simple way, conceptually, is just to do a division. The program
below has this output:
| Code: |
#include <18F452.h>
#fuses XT,NOWDT,PUT,BROWNOUT,NOLVP
#use delay(clock=4000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS)
//======================================
void main(void)
{
int32 value;
float result;
value = 0xC00000;
result = (float)value / 0x1000000;
printf("%4.2f \r", result);
while(1);
}
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I'm assuming that your value is an unsigned number. |
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avarachan
Joined: 24 Sep 2009
Posts: 3
Location: Buffalo, NY
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| thanks |
| Posted: Fri Sep 25, 2009 9:49 am |
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| Thank you. I think i will use simple division. I was at a loss as the various registers have different binary point locations. Thanks, PCMProgrammer! |
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dsabatino
Joined: 29 Jan 2010
Posts: 2
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| CS5463 SPI help |
| Posted: Tue Feb 02, 2010 1:24 am |
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Hello avarachan,
I am attempting to communicate with the CS5463 but I am having some difficulties getting my microcontroller to interface over the SPI. Could you please post your code so that I may see your working example? I am using the Atmega32 but I'm sure I would be able to port the code as needed.
Thank you very much! |
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Edson
Joined: 10 Mar 2011
Posts: 1
Location: Portugal
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| Re: How to Print binary as decimal fraction |
| Posted: Fri Mar 11, 2011 3:18 pm |
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| avarachan wrote: | Hi all,
I'm working on PIC18f2620 + CS5463 (power monitor). I saw some posts regarding CS5463 spi. In CS5463 registers, some values are 0<Vrms(for eg.)<1. These are 24 bit registers. I can read these values well and good into the processor. I'm using pic18f2620 with MPLAB IDE +CCS version 4.3.
Is there a way I can use some printf method to get the decimal fraction? or some usable format? Or should I do bit by bit 2^i thing?
To be more clear, lets say I read 0xC00000 from Vrms register. This is 0b110000000000000000000000. I need to convert it to 0.75.
Appreciate any help in advance.
Avarachan
|
Hi Avarachant
I'm not reading anything at all on CS5463. Is there any way you can send me the routine that you're using to initialize the CS5463?
_________________
Edson Teixeira |
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