cancel
Showing results for 
Search instead for 
Did you mean: 

PSoC 4 MCU

Anonymous
Not applicable

Hi,

   

I am sending data from android device to PSoc.By using

   

offdelayData[0] = wrReqParam->handleValPair.value.val[0];

   

offdelayData[1] = wrReqParam->handleValPair.value.val[1];
 offdelayData[2] = wrReqParam->handleValPair.value.val[2];
  offdelayData[3] = wrReqParam->handleValPair.value.val[3];
    offdelayData[4] = wrReqParam->handleValPair.value.val[4];
      offdelayData[5] = wrReqParam->handleValPair.value.val[5];

   

I get six bytes from device one by one.

   

In order to concatenate I converted each bytes to character by using

   

utoa(offdelayData[0], t0,10 );
 utoa(offdelayData[1],t1,10 );
utoa(offdelayData[2],t2,10 );
utoa(offdelayData[3],t3,10);
utoa(offdelayData[4],t4,10);
utoa(offdelayData[5],t5,10 );

   

and then concatenated to "t0"

   

strcat(t0,t1);
strcat(t0,t2);
strcat(t0,t3);
 strcat(t0,t4);
strcat(t0,t5);

   

then initialised to char *t=t0;

   

then converted to integer

   

 OffDelay=strtoul(t, &ptr1, 10);

   

While executing it is advertising but not received in Android device.

   

Please Give suggestions.

   

By Joany.

0 Likes
1 Solution
JoMe_264151
Expert II

Conversions like those are usually performed using shift left by 8 and ORing the result with the second byte resulting in a 16bit int.

   

When a 32bit result is expected use shift and ORs appropriately.

   

Your utoa() conversion requires as result an array of 4 characters: a byte can be as much as "255" and there is a trailing '\0" byte.

   

 

   

Bob

View solution in original post

0 Likes
54 Replies
JoMe_264151
Expert II

Conversions like those are usually performed using shift left by 8 and ORing the result with the second byte resulting in a 16bit int.

   

When a 32bit result is expected use shift and ORs appropriately.

   

Your utoa() conversion requires as result an array of 4 characters: a byte can be as much as "255" and there is a trailing '\0" byte.

   

 

   

Bob

View solution in original post

0 Likes
Anonymous
Not applicable

Hi Bob ,

   

Thanks for your suggestion.Now it works.

   

Regards

   

Joany

0 Likes
Anonymous
Not applicable

Hi bob,

   

I want to know how to read a variable value from Psoc in Android device.

   

Here I have a code

   

 for( i=1;i<=time;i++)
                {
                    
                     Alert_LED_Write(1u);
                  ms_delay(OnDelay);
                    
                    Alert_LED_Write(0u);
                   ms_delay(OffDelay);
                   
                }  

   

in Psoc.

   

While executing,I want to read the value of 'i' in Android device.

   

Please Give suggestions.

   

Best Joany

0 Likes
Anonymous
Not applicable


Hello Joanyfn

   

I had the same problem but the link below helped me alot

   

​allaboutcircuits.com/projects/how-to-communicate-with-a-custom-ble-using-an-android-app/

   


cordially
 

0 Likes
JoMe_264151
Expert II

Sorry, I'm not an Android man. 😉   Someone else must help here.

   

 

   

Bob

0 Likes
Anonymous
Not applicable

ok Thanks Bob

0 Likes
Anonymous
Not applicable

Hi,

   

I am using RTC for giving delay.I want to give ms delay but in RTC_sel only "2.0ms" period is there such that when I give "1" it gives "2.0ms" delay.

   

Is there any way to change "2.0ms" to "1.0ms" such that when I give "1" it gives "1.0ms" delay.

   

Give suggestions.

   

Best ,

   

Joany

0 Likes
Anonymous
Not applicable

Hi Bob,

   

I am using

   

for(i=1;i<=5;i++)
        {
        if(!ledOnFlag && RTC_1_GetUnixTime() - startTime >= OffDelay)
        { 
            Alert_LED_Write(LED_ON);
            ledOnFlag = 1;
            startTime = RTC_1_GetUnixTime();
        }
        if(ledOnFlag && RTC_1_GetUnixTime() - startTime >= (OnDelay))
        {
            Alert_LED_Write(LED_OFF);
            ledOnFlag = 0;
            startTime = RTC_1_GetUnixTime();
        }
         if(i>5)
        {
         break;
        }
        }

   

According to my code after 5 blink ,the LED must stop blinking but here the LED blinks continuously.

   

I want to stop blinking the LED at particular loop.

   

Give suggestions please

   

By Joany.

0 Likes
JoMe_264151
Expert II

The variable i cannot be greater than 5, only 1 to 5.

   

 

   

Bob

0 Likes
Anonymous
Not applicable

Hi bob,

   

ok. I reprogrammed as (modification shown in bold)

   

for(i=1;i<=5;i++)
        {
        if(!ledOnFlag && RTC_1_GetUnixTime() - startTime >= OffDelay)
        { 
            Alert_LED_Write(LED_ON);
            ledOnFlag = 1;
            startTime = RTC_1_GetUnixTime();
        }
        if(ledOnFlag && RTC_1_GetUnixTime() - startTime >= (OnDelay))
        {
            Alert_LED_Write(LED_OFF);
            ledOnFlag = 0;
            startTime = RTC_1_GetUnixTime();
        }
         if(i>=5)
        {
         break;
        }

        }

   

yet LED blinks after 5 times.I have to stop the blinking of LED after 5 times.

   

Give suggestions.

   

Thanks and regards,

   

Joany.

0 Likes
JoMe_264151
Expert II

Joany, can you please post your complete project, so that we all can have a look at all of your settings. To do so, use
Creator->File->Create Workspace Bundle (minimal)
and attach the resulting file.

   

 

   

Bob

0 Likes
Anonymous
Not applicable

Hi Bob,

   

I am hereby sending the file of my project

   

Thanks and regards

   

 Joany

0 Likes
JoMe_264151
Expert II

The alertlevel variable you act on is reset on a disconnect event only. So update() will blink the LED as long as alertlevel is reset. When you want to blink only once 5 times you should reset alertlevel when you acted on it.

   

For your help: Right click on "alertlevel" in your program and select "Show all active references" to see where it is used.

   

 

   

Bob

0 Likes
Anonymous
Not applicable

Hi bob,

   

Thank you for your suggestion.

   

How to reset alertlevel automatically such that the LED blinks for 5 times alone?

   

Give syntax or any suggestions to work it out.

   

Thanks and regards

   

Joany. 

0 Likes
JoMe_264151
Expert II

Reset the alertlevel  after having blinked 5 times, just the line before you break the loop.

   

 

   

         if(i>=5)

   

        {
            alertLevel = NOALERT;
           break;
        }

   

 

   

Bob

0 Likes
Anonymous
Not applicable

Hi bob,

   

I heard about flash memory that it stores last written data .

   

I also  want to know how to write and read data in flash such that onTime and offTime works properly(ie last written onTime and offTime value are taken automatically from flash memory).

   

I am using PSoc4

   

I found that  function(uint32 CySysFlashWriteRow(uint32 rowNum, const uint8 rowData[]) is used to write data in flash.

   

 

   

Now I am using

   

 ondelayData[0] = wrReqParam->handleValPair.value.val[0];
                ondelayData[1] = wrReqParam->handleValPair.value.val[1];
                ondelayData[2] = wrReqParam->handleValPair.value.val[2];
                ondelayData[3] = wrReqParam->handleValPair.value.val[3];
                ondelayData[4] = wrReqParam->handleValPair.value.val[4];
                 ondelayData[5] = wrReqParam->handleValPair.value.val[5];
            ondelayData[6] = wrReqParam->handleValPair.value.val[6];
            ondelayData[7] = wrReqParam->handleValPair.value.val[7];

   

to write data

   

and combined bytes by

   

onTime=(ondelayData[0]*10000000)+(ondelayData[1]*1000000)+(ondelayData[2] *100000) +(ondelayData[3] *10000) +(ondelayData[4] *1000) +(ondelayData[5] *100) +(ondelayData[6] *10)+ (ondelayData[7]*1);

   

Regards,

   

Joany.

0 Likes
JoMe_264151
Expert II

There are some restrictions to consider:

   

Writing to flash changes internal clocking which get in conflict with a running BLE. Radio has to be shut down before.

   

There is a "Supervisory Flash" that allows for storing some data. An example is available in the 100 BLE Projects blog.

   

 

   

Flash may not be written too often. Depending on ambient temperature it may be as low as a few K times.

   

 

   

Bob

0 Likes
Anonymous
Not applicable

Hi Bob ,

   

You have said to use 

   

  if(i>=5)

   

        {
            alertLevel = NOALERT;
           break;
        }

   

to reset automatically.

   

This I tried before and now also I tried .It just blink once and stop .Not after 5 times.

   

Please give suggestions.

   

Thanks and regards 

   

Joany

0 Likes
JoMe_264151
Expert II

Sorry, but I cannot deduct from your code what exactly you want to perform.

   

What has your blinking LED to do with the alert state which will change with every call to StackEventHandler()

   

Why are you using a slow blinking 2Hz ?

   

What you want with the blinking when the alert state is changing when not yet 5 blinks. (Set up a table)

   

Why don't you use an independent interrupt driven counter event to blink the LED

   

 

   

Bob

0 Likes
Anonymous
Not applicable

Hi Bob,

   

Now just I am doing simple project with 5 blinks.

   

ok.I will try by using an independent interrupt driven counter event to blink the LED.

   

Thanks and regards

   

From Joany

0 Likes
JoMe_264151
Expert II

When you use a timer component it will be easier to perform. Take a TCPWM configured as timer with 500ms, so you'll get a blink frequency of 1Hz.

   

No delays, no waiting, no for/while loops within your interrupt handler!!!

   

 

   

Bob

0 Likes
Anonymous
Not applicable

Hi Bob,

   

Thank you for your suggestions.I will try it and contact you.

   

Regards  Joany.

0 Likes
Anonymous
Not applicable

Hi Bob,

   

I tried with timer interrupt but it didn't work.

   

I have attached the project.

   

Please give suggestions.

   

By Joany

0 Likes
Anonymous
Not applicable

Hi Bob,

   

I referred your example related to SFlash.Should I want to write a separate program to write datas on SFlash?Should I create registers?

   

Can I assign any starting address of user SFlash row?

   

By Joany

0 Likes
JoMe_264151
Expert II

No offending: But your experiences in programming are not yet too good.

   

Stick to following advices:

   

Care for correct indentation this will help you to keep track of program flow. Could be helpful to set indenting with tabs.

   

Avoid else ifs These are commonly mis-interpreted by us programmers.

   

Avoid blank lines except for single ones separating blocks of code

   

Use comments to indicate what you want to do Only this way you can compare with what you actually did

   

Under Creator->Help you can access the "System Reference Guide". There is a chapter how to declare and define interrupt handlers.

   

Use the isr_StartEx() mechanism and do not tamper in the created files.

   

Regarding your last post

   

Should I want to write a separate program to write datas on SFlash? When you are meaning writing a subroutine / function, that will be ok.

   

Should I create registers? You cannot create registers, they are already there.

   

Can I assign any starting address of user SFlash row? Not sure what you mean: The complete flash area is divided into rows of equal size. Writing to flash will write one row completely. There are constants defining the number of rows and the size of each one.

   

 

   

Bob

0 Likes
Anonymous
Not applicable

ok .Thanks Bob .I will try.

   

By Joany

0 Likes
Anonymous
Not applicable

Hi Bob,

   

Thanks. Using the isr_StartEx() mechanism.I set the flag. I  made the firmware such a way that system is going to deep sleep only when the Blinking process has been stopped.Now its working fine.

   

I will contact you later.

   

By Joany

0 Likes
JoMe_264151
Expert II

Makes me feel glad to have helped you!

   

 

   

Bob

0 Likes
Anonymous
Not applicable

Hi,

   

In my project when LED is ON voltage is 0v and when LED is OFF voltage is 3.3v.

   

I want to know how to interchange the voltage of  LED ON and LED OFF.

   

                          That is when LED is ON voltage must be 3.3v and when LED is OFF voltage must be 0v.

   

Do I  need to modify in cydwr file??

   

Give suggestion.I have hereby attach the project.

   

By Joany

0 Likes
JoMe_264151
Expert II

That depends on the board layout. I frequently use

   

//***********************************************************************************//
//**************** Definitions and Macros *******************************************//
//***********************************************************************************//
#define    FALSE                    (0)                                            //    Define logical false and true values
#define    TRUE                    (!FALSE)                                    //    
#define    forever                    TRUE                                        //    I like that for infinite loops

   

#define    ActiveHigh                TRUE                       //    LEDs are active high in this application
 

   

#define LEDON                    ActiveHigh                                    //    LED state definition
#define LEDOFF                    !LEDON                                      //    Now we can use LED_Write(LEDOFF)

   

 

   

Bob
 

0 Likes
Anonymous
Not applicable

Thanks Bob. I followed your ideas .Yet when LED is ON ,voltage is 0v and when LED is OFF ,voltage is 3.3v.

   

I want to make the LEDON voltage 3.3v and LEDOFF voltage 0v.

   

By Joany 

0 Likes
JoMe_264151
Expert II

Then you will have to change the hardware.

   

 

   

Bob

0 Likes
Anonymous
Not applicable

ok.Thanks Bob

   

By Joany.

0 Likes
Anonymous
Not applicable

Hi Bob,

   

I am having CY8C4247LQI-BL483 .

   

​What type of hardware is required for implementing LEDON  voltage as 3.3v and LEDOFF voltage as 0v?

   

Thanks and Regards,

   

From Joany

0 Likes
JoMe_264151
Expert II

Joany,

   

You have as an electronic designer two different methods to light an LED since the "D" stands for "Diode".

   

You may connect the cathode to ground and light the LED with a positive signal

   

or

   

you may connect the anode to Vcc and light the LED with a negative signal. This form is often taken because the signal drivers usually are able to sink more current than to source.

   

I cannot recommend to tamper the board, but you may use another LED together with a resistor connected to an output pin of your board to light that LED with a positive signal.

   

 

   

Bob

0 Likes
Anonymous
Not applicable

Hi Bob,

   

It works.Thank you for your valuable suggestions.

   

By Joany.

0 Likes
JoMe_264151
Expert II

You are always welcome!

   

 

   

Bob

0 Likes
Anonymous
Not applicable

Hi Bob,

   

I want to work with three LEDS individually by using WDT interrupt in RTC.

   

But it seems to be working with one timer in RTC.

   

How to select three timers in RTC and control three LEDS individually?

   

I hereby attach the project and image of selecting one timer in RTC.

   

Regards ,

   

Joany.

0 Likes
JoMe_264151
Expert II

When Timer ISR is set to "Automatic" you cannot get in between. Set it to "User generated" and call RTC_Update() yourself. You will need a "Global Signal Reference" set to WDT and an isr component. Furthermore you can maintain a software timer that cares for your LEDs in the interrupt handler.

   

 

   

Bob.

0 Likes