cancel
Showing results for 
Search instead for 
Did you mean: 

PSoC 5, 3 & 1 MCU

Anonymous
Not applicable

hi to all,

   

             how can i  set reference voltage for ADC in psoc1. here i want to set reference voltage 2.5v.

   

thanks

   

PRP

0 Likes
Reply
1 Solution
ETRO_SSN583
Esteemed Contributor

Also look in TRM (Technical Reference Manual) for your device to get a better

   

understanding of the Ref system.

   

 

   

Regards, Dana.

View solution in original post

0 Likes
Reply
44 Replies
ETRO_SSN583
Esteemed Contributor

In global resouces window, upper left corner, select "Ref Mux" and

   

pick one of attached selections. Note if you are using Vdd = 5V, then

   

Vdd/2 +/- Vdd/2 is a 2.5 Volt reference. If you are 3.3V Vdd then use

   

external reference, or route external to a PGA and set its gain to get

   

a 2.5 V Ref.

   

 

   

Regards, Dana.

ETRO_SSN583
Esteemed Contributor

Also look in TRM (Technical Reference Manual) for your device to get a better

   

understanding of the Ref system.

   

 

   

Regards, Dana.

View solution in original post

0 Likes
Reply
Anonymous
Not applicable

Also, refer application note AN2219 PSoC 1 selecting analog ground and reference

   

http://www.cypress.com/?rID=2779

   

 

   

-Rajiv Badiger

0 Likes
Reply
Anonymous
Not applicable

 Hi every body!

   

When I use ADC10 user module to measure DC voltage 0-4V, it is OK (I'm using CY8C21323, PSoC designer 5.4). I want measure 0-5V, can you please tell me solution for that?

   

Thanks!

0 Likes
Reply
ETRO_SSN583
Esteemed Contributor

Simplest method is external R V divider, as PGA is not available on

   

this part. Divider would scale 0 - 5 to 0 - 4. Of course it would affect

   

loading of signal, and you would have to trade off magnitude of R's

   

for offsets due to leakage. And ratio would require hi accuracy R's

   

if you want to maintain accuracy. A signal path error analysis would

   

be in order.

   


   

Regards, Dana.

0 Likes
Reply
Anonymous
Not applicable

 Hi every body,

   

This is next question, can you help me?

   

I'm doing project with PSoC CY8C21323, PSoC designer 5.4.

   

Contents:

   

PSoC measure DC voltage (0-5V) from 4 pin (AnalogInput):

   

- P0.3 : voltage 0-5V.

   

- P0.2:  voltage of LM35.

   

- P0.4:  voltage of current sensor return (2.5-5V).

   

- P0.6: voltage of voltage sensor return(0-5V).

   

PSoC send all data to PC via RS232 circuit, using TX8 module.

   

At PSoC CY8C21323, in ADCs module, i see only ADC10 (has 2 analog column, AnalogColumn_InputMUX_1 and AnalogColumn_InputMUX_0).

   

How to get data from 4 pin AnalogInput? By ADC10? ADC10 can measure 0-4V!!!

   

(At PSoC CY8C21323: no ADCINC, ADCINCVR,DELSIG,PGA...)

   

Many thanks!

0 Likes
Reply
JoMe_264151
Expert II

Put the ADC into the right column (01) and use an AMUX8. Then you may select ANY input from port0

   

 

   

Bob

0 Likes
Reply
Anonymous
Not applicable

 Hi Dana, 

   

If without external RV divider, have you another solution to measure 0-5V? By another user module?

   

Because i don't want change circuit which I did.

   

Thanks!

0 Likes
Reply
Anonymous
Not applicable

 Hi Bob,

   

I will do that you said.

   

Thanks!

0 Likes
Reply
ETRO_SSN583
Esteemed Contributor

Yes, you could use a 16 bit PWM as a DAC, feed that to a comparator,

   

the other side comparator Vx from AMUX. In code do a binary search on

   

PWM duty cycle (compare) value to trip the comparator (poiling its output)

   

, or use ISR on it.

   

 

   

This will take 1 analog and 2 digital blocks, unless you use 8 bit PWM (1 block),

   

which equates to ~ 40 mV ADC resolution.

   


   

Note PWM has LP filter on output to create a DC value proportional to duty

   

cycle of PWM. PWM filter controls settling time, ripple, attached might be of help.

   

 

   

Regards, Dana.

0 Likes
Reply
Anonymous
Not applicable

Hi Bob, Dana

   

I have just coded project, i'm using TX8, ADC10, AMUX8 user module.

   

(refer "Measure and Display 0 to 4 V on LCD Using  ADC10"; www.cypress.com/?docID=35081).

   

PSoC measure DC voltage (0-5V) from 4 pin (AnalogInput):

   

- P0.3 : voltage 0-5V.

   

- P0.2:  voltage of LM35.

   

- P0.4:  voltage of current sensor return (2.5-5V).

   

- P0.6: voltage of voltage sensor return(0-5V).

   

-P1.3: TX8.

   

PSoC send all data to PC via RS232 circuit, using TX8 module.

   

(Currently, set voltage input for 4 pin AnalogInput 0-4V to test)

   

But built project errors:

   

Linking..
!E <library>(1539): {linker} area 'text' not large enough. Need 932 bytes
lo 3897 hi 4095 size 199
!E ftoa.s(1435): {linker} Code address 0:0x151 already contains a value
!E ftoa.s(1435): {linker} Code address 0:0x152 already contains a value
!E ftoa.s(1435): {linker} Code address 0:0x153 already contains a value
!E ftoa.s(1435): {linker} Code address 0:0x154 already contains a value
!E ftoa.s(1435): {linker} Code address 0:0x156 already contains a value
!E ftoa.s(1435): {linker} Code address 0:0x157 already contains a value
!E ftoa.s(1435): {linker} Code address 0:0x159 already contains a value
!E ftoa.s(1435): {linker} Code address 0:0x15a already contains a value
!E ftoa.s(1435): {linker} Code address 0:0x15c already contains a value
!E ftoa.s(1435): {linker} Code address 0:0x15d already contains a value
!E ftoa.s(1437): {linker} Code address 0:0x15c already contains a value
!E ftoa.s(1437): {linker} Code address 0:0x15d already contains a value
!E ftoa.s(1437): {linker} Code address 0:0x15e already contains a value
{linker} Too many errors, exiting...
make: *** [output/CY8C21323_ADC_0_5V.rom] Error -1
!W Use Code Compression Technologies at Projects -> Settings -> Compiler to improve memory utilization
 
CY8C21323_ADC_0_5V - 15 error(s) 1 warning(s) 22:42:57

   

I don't why! My project has about 100 line of code. Can you tell me, please? This is my project!

   

Thanks!

0 Likes
Reply
JoMe_264151
Expert II

Your ftoa is eating up 40% of your flash. Better think of calculating in integer arithmetic and convert yourself (inserting dec-point at the correct position)

   

Having only 4K flash is a bit challenging...

   

 

   

Bob

0 Likes
Reply
ETRO_SSN583
Esteemed Contributor

Here is one possibility for your own C ftoa() -

   


   

     

   

            http://www.geeksforgeeks.org/convert-floating-point-number-string/

   


   

Just google "C ftoa" and there are others.

   


   

Regards, Dana.

0 Likes
Reply
Anonymous
Not applicable

Hi Bob, Dana

   

Because ftoa() is eating up 40% of your flash which Dana said. So I don't convert recieved data from 4 pin AnalogInput to voltage, I only read value ADC10 returns from 4 pin. But value ADC10 which i received is "-", you don't care oC, A,V,Next; these are text. I'm using itoa() in project; check data by terminal 1.9b.

   

- oC   - A   - V   - V Next...
- oC    A   - V   - V Next...
- oC   - A   - V   - V Next...

   

 

   

   

I think: prolems at select pin AnalogInput by AMUX8 module fail, so ADC10 can't work well.

   

Can you please check configuration, code in my project? Is it correct?

   

Many thanks. This is my project!

0 Likes
Reply
JoMe_264151
Expert II

Not all of your used inputs on port0 are defined as AnalogInputs- Check the pin-configuration.

   

 

   

Bob

0 Likes
Reply
ETRO_SSN583
Esteemed Contributor

In parts such as this code space precious. Some suggestions to mimimize

   

needed code size -

   

 

   

    

   

          

   

These helped me in a similar experience -

   

 

   

1 - If any float math minimize the number of lines you do divides, if possible convert

   

to multiplies. Convert float to integer math where possible. Pay attention to factoring

   

of expressions, possible operation reduction, hence code reduction may result.

   

 

   

2 - Lines with function calls, minimize f(g()) compound typed expressions.

   

 

   

3 - Make sure you only use a variable type no larger than needed.

   

 

   

4 - Use unsigned variables wherever possible.

   

 

   

5 - Watchout for structures with mixed const and ram pointers within them,

   

some compilers choke on this.

   

 

   

6 - If you are heavy on Flash, light on RAM use, convert routines to RAM based

   

wherever possible.

   

 

   

7 - Try test cases of looping structures, to see what affects code size generation.

   

 

   

8 - Examine .lst file for code that looks wacky in bytes used, understand what

   

compiler did, and consider rewrite.

   

 

   

9 - Use inline ASM where .lst file C generation looks excessive.

   

 

   

10 - Look at module reuse, sharing, dual purpose, to eliminate # modules 

   

needed, like counters/timers....Also look at data sheets of modules that could

   

serve function needed, and compare ROM/RAM requirements needed. Optimize

   

global HW, like clocks VC1/2/3/Sleep, to eliminate need for other timer/counters.

   

Use register routing control to "share" module from one task to another, one pin

   

to another.

   

 

   

11 - Extended library, functions within them are written to be perfectly general,

   

hence larger code size, you may be able to write one with less code needed for

   

your specific requirements that result in smaller code size.

   

 

   

12 – Look for approximations to compute transcendental functions if used.

   

 

   

13 - Although no longer supported by HiTech or Cypress, the HiTech Pro compiler

   

yielded on first try ~ 40% code reduction in my design when I first converted

   

to it. Then the prior comments yielded another 4 K later in design as I was up

   

against 32 K Flash limitation.

   

 

   

14 - Some compilers have a setting to optimize code size or speed, the latter

   

prone to larger code size. Also look at compiler vendors web site for ap notes

   

and suggestions on optimization, compilers from different vendors behave and

   

optimize  differently.

   

 

   

15 - const data, strings, etc.., look for ability to reuse common string mnemonics,

   

text.

   

 

   

16 - Pointer usage can lessen code size, see url's below. Look for function calls

   

passing longs as value vs pointer, convert to latter. Compiler has to copy all these,

   

if not referenced. Do not pass longs or floats as values, keep always in mind native machine size.

   

 

   

17 - Most compilers will optimize when indexes, pointers, a power of 2, or divides,

   

divide becomes a shift.

   

 

   

18 - Look at how linker distributed code and data segments, sometimes you can discover

   

a poor decision by linker and force code/data into certain psects using pragma constructs,

   

thereby minimizing wasted ROM space.

   

 

   

19 – When you debug generally you want to turn off optimization, as compiler/linker will

   

remove code and make jumps that do not make “sense” but are the result of optimization.

   

When you are up to Flash boundary you may not be able to turn it off, otherwise

   

application will not load. Keep this in mind, that  your debug strategy may have to change.

   

I also found if using ICE Cube that debugger may no longer report “watch” variables, this

   

occurred at ~ 31.5K bytes. In either case you may want to comment out large code sections

   

to effectively debug.

   

 

   

20 – f() calls take overhead, if you only call a f() once you might eliminate it as a f() call and

   

place code inline.

   

 

   

21 – Look for f() opportunities, wherever you are coding and repeating similar  operations.

   

This is obvious, but sometimes missed.

   

 

   

22 – Check compiler on macros, to see if they are being optimized or just being used inline

   

using more code space vs a f() call solution.

   

 

   

23 – Examine compiler/linker parameter control. For example in HiTech there is the AUTOBANK

   

setting that controls where local variables are stored, in my case setting to 1 lowered code size by

   

~ 250 bytes. READ the MANUAL !

   

 

   

24 – Use inline variable declarations, vs pre declaration (compiler dependent) -

   

 

   

                This                        void dosomething ( void  ) {

   

 

   

                                                                for (  unsigned char I = 0;…..

   

                                                }

   

 

   

                Not This               void dosomething ( void  ) {

   

 

   

                                                Unsigned char I = 0;

   

 

   

                                                                for (  I = 0;…..

   

                                                }

   

 

   

Some help -

   

 

   

http://www.codeproject.com/Articles/6154/Writing-Efficient-C-and-C-Code-Optimization

   

 

   

http://www.eventhelix.com/realtimemantra/basics/optimizingcandcppcode.htm

   

 

   

http://www.azillionmonkeys.com/qed/optimize.html

   

 

   

By using these techniques I was able to regain ~ 4K Bytes of code space in a 32K design, which

   

I promptly then used up again 😞

   

 

   

Note HiTech compiler, no longer offered, but if you can get a copy I experienced a 40% code

   

reduction over Imagecraft. And > 30% over Imagcraft Pro.

   

 

   

Regards, Dana.

0 Likes
Reply
Anonymous
Not applicable

Thanks Bob, Dana!

   

Hi Bob, you said:

   

"Not all of your used inputs on port0 are defined as AnalogInputs- Check the pin-configuration."

   

Mean:

   

If all of inputs on port0 must be defined as AnalogInputs, I would use AMUX8 module.

   

Currently, on port0, i'm using 4 pin as AnalogInputs, not enough to use AMUX8 module?

   

Can you please tell me why?

   

Thanks!

0 Likes
Reply
Anonymous
Not applicable

Sorry Bob ,

   

I understand that you said after checking configuration pin in my project!

   

Thanks for your help! 

0 Likes
Reply
ETRO_SSN583
Esteemed Contributor

Any pin used as analog must be set to "AnalogInput", "Hi Z Analog".

   

 

   

So if you used AMUX4 those pins and any other pins in the port, used

   

as analog, must be set per above.

   

 

   

Regards, Dana.

0 Likes
Reply
Anonymous
Not applicable

Hi Dana,

   

I have solved problems about convert float to string.

   

I will code for measuring voltage 0-5V (CY8C21323).

   

If i have problems, i will ask you again.

   

Many thanks!

0 Likes
Reply
Anonymous
Not applicable

 Hi Dana,

   

I read document which you sent for me, but I can't understand clearly about "Using PWM16 and AMUX user module to measure voltage 0-5V" ( your another solution).

   

At PSoC CY8C21323: no ADCINC, ADCINCVR,DELSIG,PGA... So I'm difficult to solve that prolem!

   

Can you tell me clearly, please?

   

Or can you send a project example about that for me? 

   

Many thanks.

0 Likes
Reply
ETRO_SSN583
Esteemed Contributor

Use a PWM and a comparator wired as shown below. Then write

   

a SAR like routine that works as follows (the binary search algorithim    

   

in this ap note)          http://www.maximintegrated.com/en/app-notes/index.mvp/id/1080

   

 

   

Simply stated you start by setting all bits of the compare value of PWM, which sets its

   

duty cycle, to 0 except for MSB, if the comparator then outputs a 0 then voltage is less

   

and this  compare bit gets set to 0, otherwise leave it, then set MSB - 1 bit to "1" and

   

look at comparator output again after writing this to PWM compare register. As you go

   

thru this simple algorithim you will arrive at an equivalent voltage out of the PWM

   

integrator that ~ matches Vunknownin, eg. the last comapare value you used for PWM.

   

The reference is Vdd in this approach, which controls accuracy. If you need high

   

accuracy use a reference for Vdd for the PSOC. The other issue is the approach relies

   

on the input signals varing slowly, otherwise algorithim will produce a bad result. Real

   

world SARs use a S/H on their input. In your case use averaging to eliminate the

   

varience for rapid input signal changes. Stated another way the algorithim ideally would

   

like to run faster that the input signal rate of change for 1/2 LSB.

   

 

   

The PWM filter, you trade off settling time vs ripple, the app note I attached earlier will aid in

   

determining its cutoff frequency.

   

 

   

0 Likes
Reply
ETRO_SSN583
Esteemed Contributor

Another approach is to use simple RC, and this ap note discusses that

   

and simple slope converters you can consider.

   

 

   

    

   

          http://www.ti.com/lit/an/snoa627/snoa627.pdf

   

 

   

Regards, Dana.

0 Likes
Reply
ETRO_SSN583
Esteemed Contributor

One more method, you have to make calculations for input

   

range. Try googling this problem for simple A to D with embedded

   

processors, I am sure there are other ideas out there.

   

 

   

    

   

          http://www.bytecraft.com/Low_Cost,_Low_Speed_A_D_conversion_for_Embedded_Systems

   

 

   

Regards, Dana.

0 Likes
Reply
Anonymous
Not applicable

Hi Bob, Dana
I have issue when I select pin AnalogInPut for ADC10 by AMUX8.
It's:
- I want: select pin0.x by AMUX8, ADC10 will return value pin0.x
- Actual: select pin0.x by AMUX8, ADC10 will return not value pin0.x!!!
Although, that value returns is correct! I checked on the circuit!
Pin AnalogInput in my project:
P0.2: LM35
P0.4: I
P0.6: Vaq
P0.3: Vvr
//This is results if I call true pin on the circuit, it isn't value which I want (Line of code is commented by me):
Unit: V (voltage)
LM35= 02.95; I= 00.44; Vaq = 02.46; Vvr = 03.91
LM35= 02.96; I= 00.44; Vaq = 02.47; Vvr = 03.91
...
LM35: P0.3 return (Vvr) , not P0.2 return
I: P0.2 return (LM35), not P0.4 return
Vaq: P0.4 return (I), not P0.6 return
Vvr: P0.6 return (Vaq), not P0.3 return
I can't why???
//This is results if I call not true pin on the circuit, but that value which I want!(Line of code is not commented):
LM35= 00.44; I= 02.53; Vaq = 03.98; Vvr = 03.00
LM35= 00.44; I= 02.53; Vaq = 03.89; Vvr = 03.02
...
With
LM35: I called P0.4
I: I called P0.6
Vaq: I called P0.3
Vvr: I called P0.2

   

Here is code funtion select pin AnalogInput:
unsigned int ReadADCChannel(BYTE Channel)
{
 unsigned int ADCResult;
 BYTE x;
 AMUX8_Start();
 switch (Channel)
 {
  case 0:
   // Connect P0.2 to Mux Bus
//   AMUX8_InputSelect(AMUX8_PORT0_2);
   AMUX8_InputSelect(AMUX8_PORT0_4);
   break;
   
  case 1:
   // Connect P0.4 to Mux Bus
//   AMUX8_InputSelect(AMUX8_PORT0_4);
   AMUX8_InputSelect(AMUX8_PORT0_6);
   break;
   
  case 2:
   // Connect P0.6 to Mux Bus
//   AMUX8_InputSelect(AMUX8_PORT0_6);
   AMUX8_InputSelect(AMUX8_PORT0_3);
   break;
   
  case 3:
   // Connect P0.3 to Mux Bus
//   AMUX8_InputSelect(AMUX8_PORT0_3);
   AMUX8_InputSelect(AMUX8_PORT0_2);
   break;
 }
 // Give a small delay
 for (x = 0; x < 25; x++) {};
 
 while(0 == ADC10_fIsDataAvailable());
 ADCResult = ADC10_iGetDataClearFlag();
 ADC10_ClearFlag();
 
 AMUX8_Stop();
 // Return the result
 return ADCResult;
}

   

Below, there is my project!
Can you check for me, please?
Many thanks!

0 Likes
Reply
ETRO_SSN583
Esteemed Contributor

I can't see the problem unless you have wired pins wrong. Below is what your

   

project says the wiring is, and I commented up your code a little -

   

 

   

unsigned int ReadADCChannel(BYTE Channel)
{
    unsigned int ADCResult;
    BYTE x;
    AMUX8_Start();
    switch (Channel)
    {
        case 0:                                    // Temperature
            // Connect P0.2 to Mux Bus
//            AMUX8_InputSelect(AMUX8_PORT0_2);    // Temperature
            AMUX8_InputSelect(AMUX8_PORT0_4);    // Current
            break;
           
        case 1:                                    // Current
            // Connect P0.4 to Mux Bus
//            AMUX8_InputSelect(AMUX8_PORT0_4);    // Current
            AMUX8_InputSelect(AMUX8_PORT0_6);    // Voltage
            break;
           
        case 2:                                    // Voltage
            // Connect P0.6 to Mux Bus           
//            AMUX8_InputSelect(AMUX8_PORT0_6);    // Voltage
            AMUX8_InputSelect(AMUX8_PORT0_3);    // 5V
            break;
           
        case 3:                                    // 5V
            // Connect P0.3 to Mux Bus
//            AMUX8_InputSelect(AMUX8_PORT0_3);    // 5V
            AMUX8_InputSelect(AMUX8_PORT0_2);    // Temperature
            break;
    }

   

 

   

 

   

 

   

0 Likes
Reply
ETRO_SSN583
Esteemed Contributor

Possibly this is problem, maybe do a clean and build on design, reaching for straws.

   

 

   

    

   

          http://www.cypress.com/?id=4&rID=93824

   

 

   

Regards, Dana.

0 Likes
Reply
Anonymous
Not applicable

 Thanks Dana,

   

I will do that you said!

0 Likes
Reply
Anonymous
Not applicable

 Hi Dana, 

   

I did that you advise buy it isn't success!

   

I removed AMUX8. Then I used AMUX4 but it isn't success same when I use AMUX8.

   

(About: select pin0.x by AMUX8, ADC10 will return not value pin0.x!!! ; at PSoC CY8C21323)

   

I think it is prolem with AMUX4/AMUX8.

   

 

   

Currently, I have a pin on PSoC CY8C21323: P1.2 (can't configure as AnalogInput. So I can't use ADC10).

   

P1.2 (input): Signal ipnut is analog.

   

If P1.2 have signal input , voltage on P1.2 is : 0 - 3.84V. 

   

If P1.2 have no  signal input , voltage on P1.2 is 4.8V.

   

I want compare voltage value on P1.2 with 3.84V (check status on pin P1.2, ON/OFF).

   

-  (voltage value on P1.2) < 3.84V: ON (have signal input).

   

- (voltage value on P1.2)  > 3.84V: OFF(no  signal input).

   

Can you help me, please?

   

What are user modules that check status on pin P1.2?

   

Many thanks!

0 Likes
Reply
ETRO_SSN583
Esteemed Contributor

Can you take just 1 pin, configured as analog in, hi z analog, and feed

   

a voltage to it into ADC10 and get correct result ?

   

 

   

To read a pin, if it is a digital input, use vpin = PRTnDR where n = port

   

number. Note if this is in a port where you are doing read modify writes

   

you must use shadow registers, see this topic in -

   

 

   

    

   

          http://www.cypress.com/?rID=2900

   

 

   

Post project again in current state. Note I do not have the hardware to test

   

your project, so you might consider posting a CASE at cypress where then

   

can setup and run your basic code and verify any issues.

   

 

   

    

   

          

   

To create a technical case at Cypress -

   

 

   

www.cypress.com

   

“Support”

   

“Technical Support”

   

“Create a Case”

   

 

   

You have to be registered on Cypress web site first.

   

 

   

Regards, Dana.

0 Likes
Reply
ETRO_SSN583
Esteemed Contributor

If you want to check V on a pin, 3.84 V -

   

 

   

1) Place a CMP (Comparator module)

   

2) Positive input to analog mux buss, and route pin to it

   

3) Negative input to VBG (internal reference 1.3V)

   

4) On pin to mux buss to CMP place a R divider At pin so that its junction = 1.3 V when

   

input to the divider = 3.84 V

   

5) Config pin as analog in, hi z analog.

   

5) Poll the comparator output with API or use ISR (look at notes in datasheet on

   

interrupt generation control). If you want to poll, you would add a digital buffer, route its input

   

to comparator buss, and its output to a pin, and poll the pin.

   

 

   

Regards, Dana.

   

 

   

0 Likes
Reply
ETRO_SSN583
Esteemed Contributor

Keep in mind since CMP module has no hysterisis you would need

   

to debounce the CMP output in code, especially if you have some noise

   

in system. Debounce would work just like debouncing a button.

   

 

   

Attached some info on debouncing.

   

 

   

Regards, Dana.

0 Likes
Reply
Anonymous
Not applicable

 Hi Dana,

   

About "Can you take just 1 pin, configured as analog in, hi z analog, and feed

   

a voltage to it into ADC10 and get correct result ?".

   

if I take just 1 pin, ADC10 return value correct; no problem!

   

I will see those topic which you advise.

   

Thanks!

0 Likes
Reply
Anonymous
Not applicable

 Hi Bob, Dana

   

I'm doing a project with PSoC1 CY8C24123A.

   

Contents:

   

- Measure voltage on P0.3, P0.2, P0.4 (0-5V).

   

- Then, send all data (voltage) to PC (via RS232 circuit).

   

I'm using user modules: ADCINCVR, PGA,AMUX8,TX8.

   

If I measure voltage only pin (example P0.3), it's OK (ADCINCVR, PGA,TX8).

   

But when I measure 3 that pin, values are not correct!(ADCINCVR, PGA,AMUX8,TX8). Voltage on 3 pin is similar(equals)!

   

Can you check my project ,please? Or tell me another solutions to do that project!

   

Below is my project!

   

Many thanks!

0 Likes
Reply
ETRO_SSN583
Esteemed Contributor

Post the latest copy of your project.

   

 

   

Regards, Dana.

0 Likes
Reply
Anonymous
Not applicable

I'm sorry!

   

Below is my project.

0 Likes
Reply
JoMe_264151
Expert II

Your pins at P0 are not set as "Analog Input"

   

 

   

Bob

0 Likes
Reply
JoMe_264151
Expert II

Ooops, sorry ! I came into the wrong column. Your inputs are set correctly

   

 

   

Bob

0 Likes
Reply
JoMe_264151
Expert II

There and back again!

   

You use P0_2 _4 _6 _3 and only of those P0_3 is an analog input port.

   

Bob

0 Likes
Reply