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Ttelmah
Joined: 11 Mar 2010
Posts: 20061
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 Posted: Tue Aug 25, 2015 11:14 am |
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I'd suggest the 12F1572.
Cheap (0.43). Assuming you are running at 5v?. If not the LF variant. Loads of peripherals (3*CCP, 1*UART, loads of timers, DAC, Comparator etc.), and draws less power than your current chip!...
The 12F1822/40, is more expensive. |
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soonc
Joined: 03 Dec 2013
Posts: 215
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| Thanks |
| Posted: Tue Aug 25, 2015 10:55 pm |
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I should visit that site more often.
CCS compiler allows me to build a project for PIC12F1572 but it does not compile at all. ! |
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Ttelmah
Joined: 11 Mar 2010
Posts: 20061
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| Posted: Wed Aug 26, 2015 4:30 am |
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There are some setup problems on early compilers for this chip, but most are easy to fix.
Try something really basic like:
| Code: |
#include <12F1572.h>
#device ADC=10
#FUSES NOMCLR, INTRC_IO, STVREN, NOLVP, NODEBUG, WDT_SW, BROWNOUT_SW
#use delay(internal=2MHz)
#use rs232(baud=9600,parity=N,UART1,bits=8,stream=PORT1,ERRORS)
void main()
{
while(TRUE)
{
output_toggle(PIN_A0); //Test to prove chip is running
delay_ms(100);
}
}
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and tell us what happens. |
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soonc
Joined: 03 Dec 2013
Posts: 215
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| Change of plans |
| Posted: Wed Aug 26, 2015 4:57 am |
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| Ttelmah wrote: | I'd suggest the 12F1572.
Cheap (0.43). Assuming you are running at 5v?. If not the LF variant. Loads of peripherals (3*CCP, 1*UART, loads of timers, DAC, Comparator etc.), and draws less power than your current chip!...
The 12F1822/40, is more expensive. |
If I change plans and use the PIC16LF1823 it allows me to make this a slave I2C and connect it to the existing I2C bus and free up two pins on Chip 2 which means I may yet get rid of a port expander chip !
It also has built in hardware debugging capability which may be needed to get the I2C working.
Price is only a few cents more. Current draw should be a little less also.
Thanks everyone for all the help. |
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soonc
Joined: 03 Dec 2013
Posts: 215
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| OK |
| Posted: Wed Aug 26, 2015 5:03 am |
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| Ttelmah wrote: | There are some setup problems on early compilers for this chip, but most are easy to fix.
Try something really basic like:
| Code: |
#include <12F1572.h>
#device ADC=10
#FUSES NOMCLR, INTRC_IO, STVREN, NOLVP, NODEBUG, WDT_SW, BROWNOUT_SW
#use delay(internal=2MHz)
#use rs232(baud=9600,parity=N,UART1,bits=8,stream=PORT1,ERRORS)
void main()
{
while(TRUE)
{
output_toggle(PIN_A0); //Test to prove chip is running
delay_ms(100);
}
}
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and tell us what happens. |
Thanks that compiles.
I used the PIC Wizard in the IDE to setup a project and it could not find the include, and it did not generate any #FUSES statements.
I'm still waiting for CCS tech support to fix the Break Point issue on the PIC24. They acknowledged that they could reproduce the issue. |
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Ttelmah
Joined: 11 Mar 2010
Posts: 20061
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| Posted: Wed Aug 26, 2015 5:06 am |
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Yes, going I2C, with hardware sounds a very good option. 
Looks like you have a good idea now of a neat way of doing this. Long term a much better approach.
My opinion of the Wizard unfortunately is not suitable for public release..... |
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