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PSoC 5, 3 & 1 MCU

Anonymous
Not applicable

Hello,

   

im receive some data (RX) via UART :

   

1. convert it (atoi()) into a Integer,

   

2. conver it (itoa()) into a String and sent it (TX) via UART.

   

Meanwhile, reading 2 voltages (dualadc) and output (dac8) one voltage.

   

Problem -> If i comment-out all ADC and DAC Code, the UART Communication works fine. But with all User-Moduls + miniCode the UART Communication is faulty (irregular).

   

:: What can i do?

   

 

   

Settings:

   

Global Settings = 24Mhz, (Vdd/2)+/-(Vdd/2), SC On/Ref High

   

UART = 9600, Sync to SysClk, 

   

DUALADC = 8  Bit, CalcTime 45, DUALADC_HIGHPOWER,  PGA_1_HIGHPOWER, PGA_2_HIGHPOWER,

   

DAC = DAC8_HIGHPOWER
    

   

Thanks for your reply.

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31 Replies
Esteemed Contributor II

"smells" a bit like stack fault or overwritten variables.

   

Only thing I can see so far (well documented and clean code!!!) is the size of the rx buffer which is currently set to 10 bytes.

   

1  command, 2 separators, 2 params, 1 zero byte that is 4 bytes left for 2 params. Seems a bit low imho.

   

 

   

Bob

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Esteemed Contributor II

At second thought... There are more modern chips (which already have got a BLE radio included which could make your design smaller and easier. Ever looked at those PSoC4 chips with a BLE 4.1 radio in a simple module ~10x10x 1.8mm.

   

 

   

Bob

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Anonymous
Not applicable

Thanks for your fast help! 

   

I increased the RX-Buffer, but same Problem (see Pics).

   

My Approach:

   

1. Check the TX-Data from Device 1 with another UART-PC-Transmitter = Device 1 sends all data correct.

   

2. Check the TX-Data from Device 2 (.zip) with another UART-PC-Transmitter = Device 2 TX Communication is faulty (irregular).

   

3. Read AN15576 and the debugger stopped the code on "boot.asm / org 30h, reti(PSoC Block DBB10)".

   

What does this mean?

   

 

   

One another thing, im searching a Prototyping Kit with included Bluetooth Modul and i can only find the PSoC 4 Pioneer Kit. Does Cypress sell another Prototyping Kit + Bluetooth (not separated).

   

 

   

Thanks for your reply!

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Esteemed Contributor II

Have a look at this kit.

   

You obviously have got an ICE-Cube, did you monitor the stack?

   

And check the status for zero (or pvar for non-zero) after ftoa()

   

 

   

Bob

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Esteemed Contributor II

... and give this a try:

   

        csprintf(Buffer,"I-Hall-Eingelesen->%f\n\r",I_Hall_Neu);
        UART_PutString(Buffer);            

   


You'll need

   

#include "stdio.h>

   

char Buffer[40];

   

 

   

Bob

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Anonymous
Not applicable

Thanks for your help, but csprintf dont work with floats --> Uart Output is black screen (with %d for  decimal = it works)

   

One other Question: how can i convert negative floats (e.g. -2.344)to string, because ftoa is characterised = /* |input| > 2147483520 *//* |input| < 0.0000001 */  = Out of Range

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Esteemed Contributor II

You have to do that yourself, when the number is negative change to a positive and prepend the result with a minus sign.

   

 

   

Bob

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Anonymous
Not applicable

I did exactly what you say "

   

... and give this a try:

   

        csprintf(Buffer,"I-Hall-Eingelesen->%f\n\r",I_Hall_Neu);
        UART_PutString(Buffer);            

   

You'll need

   

#include "stdio.h>

   

char Buffer[40];"

   

 

   

with a new Project, but no Uart output. What is wrong? (I reinstalled Psoc Designer 5.4 SP1)

   

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Esteemed Contributor II

I cannot even see your welcomeScreen(). This should work.

   

 

   

Bob

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Anonymous
Not applicable

Sorry it didn't work.

   

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Esteemed Contributor II

Hmmm...., seems as if the printf() family not correctly implemented using floats for PSoC1.

   

Bob

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Anonymous
Not applicable

Can I do Anything?

   

By the way, the Uart Output from Device 2 to Device 1 was lost because the transmission was to fast...

   

 

   

I found a Sting to  Float Function + negative numbers + decimal place definition

   

 

   

void ftoaNew(char *buffer, float var, int precision)
{
    long wholePart = (long) var;
    char *endOfString= buffer;
    float fraction;
    // Deposit the whole part of the number.

   

    itoa(buffer,wholePart,10);

   

    // Now work on the faction if we need one.

   

    if (precision > 0) {

   

        // We do, so locate the end of the string and insert
        // a decimal point.

   


        while (*endOfString != '\0') endOfString++; //im buffer von itoa
        *endOfString++ = '.';

   

        // Now work on the fraction, be sure to turn any negative
        // values positive.

   

        if (var < 0) {
            var *= -1;
            wholePart *= -1;
        }
        
        fraction = var - wholePart;    //Trennung von Nachkommastellen und Vorkomma
        while (precision > 0) {

   

            // Multipleby ten and pull out the digit.

   

            fraction *= 10;
            wholePart = (long) fraction;
            *endOfString++ = '0' + wholePart; // ASCII Table z.B. 5 => '0' = 48 + 5 = 53 = '5'
                        
            // Update the fraction and move on to the
            // next digit.

   

            fraction -= wholePart; // nächste Nachkommastelle
            precision--;
        }

   

        // Terminate the string.

   

        *endOfString = '\0';
    }
}

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Esteemed Contributor II

Yes, you should use that conversion.

   

 

   

Bob

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Anonymous
Not applicable

One little Question:

   

If i use 1 DUALADC on PIN 0_0 & 0_1 and 1 DAC8 on PIN 0_5, can i set PIN 0_3 with "PRT0DR |= 0b1000;" high (for a LED) or should i use a shadow Reg. ?

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Esteemed Contributor II

Your pin usage of P0 is analog, so you probably do not need a shadow register, but I would suggest you to use one. No problems when project gets expanded.

   

 

   

Bob

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Anonymous
Not applicable

Thanks for your Help.

   

Another Question: I found "StripLights" (http://www.cypress.com/forum/psoc-community-components/neopixel-ws281112-component) for PSoC4. Can i find anything like that for PSoC1?

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Esteemed Contributor II

You are living in (good old) Germany, so access to US products is easy. Have a look into the distributor's websites as Mouser or Future electronics (best experiences) for Cypress prototyping kits. Prices are comparably low, you even can get a (very powerful) PSoC5 prototyping kit for $10. I do not use PSoC1 for new designs (too expensive when calculating chip, time and equipment needed), but PSoC4s and 5s.

   

 

   

Bob

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Anonymous
Not applicable

1. On the Datasheet "CY8C58LP Family Datasheet" which is on "cy8ckit-059-psoc-5-prototyping-kit", i found a CAN Interface. What

   

additional device (plz cheap) should i buy?

   

2. On the Psoc5lp prototyping kit is 2 pins labeled for uart and 2 pins for I2C. What is with SPI and can i choose e.g. Pin 0_1 & P 0_2 for added UART Communication?

   

I never worked with the psoc creator ...

   

 

   

Thanks

   

 

   

I will order "http://www.cypress.com/documentation/development-kitsboards/cy8ckit-059-psoc-5lp-prototyping-kit-onb...

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Esteemed Contributor II

PSoC5s are able to route (nearly) every output to any pin. Exception is the USB interface and some dedicated pins.

   

Download and install Creator asap! Download and install the Kit files! Watch the videos to see how to work with Creator. Will take you a day. Play with the example projects. You can start all this today before your hardware arrives.

   

CAN controller is imho not quite easy to program, at first you will need another CAN devive which you CAN  can connect your kit to. You will need CAN-bus drivers to provide the required interface. When you have got two PSoC CAN interfaces you may during the development phase connect them directly without the drivers.

   

 

   

Bob

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Anonymous
Not applicable

Cool, lets start it 🙂

   

To the CAN Bus, in the past i worked with different Fieldbusses e.g. https://www.br-automation.com/de-de/produkte/steuerungssysteme/x20-system/bus-controller/x20bc0053/ , CANopen, DeviceNet, Profibus,.... and it was always similar: adjust BUS Parameters, depend on it and speak on the BUS. CAN i do it equal with a PSoC5 Developement Kit or need i a level amplifier or any extra Hardware? With the FDT/DTM Driver you have always the same surface....

   

Thx for your reply
 

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Esteemed Contributor II

Since CAN line is a two-wire differential IO you will need an interface chip like this one.

   

Could be too difficult for a newbie to integrate the driver using the PSoC5 internal OpAmps.

   

 

   

Bob

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Anonymous
Not applicable

Cool, but i dont need this interface chip, if i use 3 x PSoC 5 development kits and they are communicate over CAN. Is that right?

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Esteemed Contributor II

Should work, I never tried that. Just connect the Rx and Tx crosswise.

   

 

   

Bob

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Anonymous
Not applicable

I have some basic Question:

   

1.PSoC fundamental Advantage is that i can not only simulate OpAmplifier, LogicBlocks !?

   

2.Thus i can create e.g. this CAN-IC (Above) within the PSoC-Controller!?

   

3.Thus i need fundamental Elec. Knowlegde, without that i can use every standard uC, can you recommend a German Book/PDF, because the i have no Ideas what can all i do and for what. The PSoC AN are very good, but you need first the Idea and then you can learn from the PSoC AN..

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Esteemed Contributor II

i can not only simulate OpAmplifier, LogicBlocks   As a matter of fact, it is not a simulation. The components as OpAmp, SCBs UDBs are really there.

   

i can create e.g. this CAN-IC (Above) within the PSoC-Controller Yes, quite right. What you get is an agglomeration of internal hardware and a bunch of software. APIs to access the underlying hardware, all made ready by Cypress and documented for you on a silver tablet 😉

   

Thus i need fundamental Elec. Knowlegde  Yes, fundamental. I have seen Mark Sounders from Cypress programming a model car to follow a black line on white paper. All was done in software. Then he changed the project and realized the whole problem in pure hardware. It is THE advantage that you can get solutions that fit to your style and knowledge. How much C-code and how much hardware you will use just depends on you.

   

I haven't got a recomendation for a book, but I would suggest you to ask in Amazon -> Books for PSoC and decide for yourself. The book written by Dave van Ess is very basic and really deals with bits, so you can skip that.

   

 

   

Bob

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Anonymous
Not applicable

One little Question to the PSoC Designer (PSoC1). Does a long, int, char wrap around automatic, if i increment it to the max (wraps around from INT_MAX to INT_MIN )?

   

 

   

Thanks Bob

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Esteemed Contributor II

Short answer: Yes.

   

Long answer: Read a C-language manual like this one.

   

 

   

Bob

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Anonymous
Not applicable

Thats cool, thank you !

   

To the UART / PSoC 1, if i that the "Global Resources-Ref Mux to VDD/2-+VDD/2" is the TTL-Pegel 3,3V or 5V?

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Esteemed Contributor II

Afaik does the refmux value have no influence in the level on input pins.

   

 

   

Bob

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Anonymous
Not applicable

Thank you, so it should be 5V TTL-Level!?

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Anonymous
Not applicable

I measured it with an oscilloscope --> 3,3V Level

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