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How to enable multiple ADCs

 
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pilar



Joined: 30 Jan 2008
Posts: 197

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How to enable multiple ADCs
PostPosted: Thu Sep 14, 2023 5:28 pm     Reply with quote
Hi, I am using the PIC18F4620 with CCS 4.74 and I need to configure the first seven channels of the ADC converters (ADC0, ADC1, ADC2, ADC3, ADC4, ADC5, AD7), for this I am using this command:

Code:
   setup_adc_ports(AN0_TO_AN7);


but it enables the RE1 pin as ADC6, I don't want this because I am using this pin as an output, how can I do what I need?
Ttelmah



Joined: 11 Mar 2010
Posts: 19226

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PostPosted: Thu Sep 14, 2023 11:36 pm     Reply with quote
You can't.
This is a 'read the data sheet'one.
Page 224. Register 18-2, shows the patterns of ADC inputs supported
by this chip (on the current datasheet).

Change to a more modern PIC. Newer devices do allow individual
pins to be selected, instead of the patterns supported by this chip.
Alternatively, you need to redesign your board to move the analog
signal to AN6 and your digital signal to E2.
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