reading two a/d channels

[chris_1982]

<font face="Courier New" size=-1>I am trying to read from two a/d channels on my 16F877. I am using the standard inbuilt read_adc() function. I set the channel then delay for 100ms before i take the reading BUT I can not read both channels within 1 program (both channels work if only 1 is being read within the program)

Has anyone got any suggestions as to errors I may have made.

I am using the PCM 3.023 compiler I have added the setup and read sections of my code below

thanks

chris


#Device ADC=10

setup_adc_ports(ALL_ANALOG);
setup_adc(ADC_CLOCK_internal);
setup_spi(FALSE);
setup_psp(PSP_DISABLED);
setup_counters(RTCC_INTERNAL,RTCC_DIV_2);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_ccp1(CCP_OFF);
setup_ccp2(CCP_OFF);

set_adc_channel(0);
delay_ms(100);
adc=read_adc();

set_adc_channel(1);
delay_ms(100);
adc=read_adc();</font>
___________________________
This message was ported from CCS's old forum
Original Post ID: 12931

[Neutone]

:=<font face="Courier New" size=-1>I am trying to read from two a/d channels on my 16F877. I am using the standard inbuilt read_adc() function. I set the channel then delay for 100ms before i take the reading BUT I can not read both channels within 1 program (both channels work if only 1 is being read within the program)
:=
:=Has anyone got any suggestions as to errors I may have made.
:=
:=I am using the PCM 3.023 compiler I have added the setup and read sections of my code below
:=
:=thanks
:=
:=chris
:=
:=
:=#Device ADC=10
:=
:= setup_adc_ports(ALL_ANALOG);
:= setup_adc(ADC_CLOCK_internal);
:= setup_spi(FALSE);
:= setup_psp(PSP_DISABLED);
:= setup_counters(RTCC_INTERNAL,RTCC_DIV_2);
:= setup_timer_1(T1_DISABLED);
:= setup_timer_2(T2_DISABLED,0,1);
:= setup_ccp1(CCP_OFF);
:= setup_ccp2(CCP_OFF);
:=
:= set_adc_channel(0);
:= delay_ms(100);
:= adc=read_adc();
:=
:= set_adc_channel(1);
:= delay_ms(100);
:= adc=read_adc();</font>

Ask CCS to provide you with a newer compiler version. Your code should work.
___________________________
This message was ported from CCS's old forum
Original Post ID: 12934