PSoC™ 4 Forum Discussions

Let there be interrupts configured with multiple priorities. If high-priority interrupt is to be executed while the low-priority interrupt is executing, CM0 nests the interrupts, pre-empts the low-priority interrupt and executes the high-priority one.

Now, the question - we would like to decide in high-priority interrupt whether we want to return the execution to the low-priority interrupt or skip/disable it. Is this possible?

Would changing the LR from 0xFFFFFFF1 to 0xFFFFFFF9 and taking data off the stack do it?

Hello,

I have one simple programm see attached "main1.c" that works properly, respectively I can read with Master the EZI2C-Buffer without problems:

But than I have a second program with a little bit more code "main2.c" but in fact the same  - and there I cannot read the EZI2C-Buffer.

I only get always 0 values, except I stop CapSense before give a Value to the buffer.

I am very confused, and I don't know, see why with main1.c it works but with main2.c it not works??

It would be very appreciate if anybody could help or point me to an solution....?

thank you very much

main1.c

#include "project.h"

uint8 reg[20]={0};

uint8 diff=0;

int main(void)

{

    CyGlobalIntEnable; /* Enable global interrupts. */

    /* Place your initialization/startup code here (e.g. MyInst_Start()) */

    EZI2C_EzI2CSetBuffer1(sizeof(reg), 1, (uint8 *)&reg);

    EZI2C_Start();

    CapSense_Start();

    CapSense_ScanAllWidgets();

    while(CapSense_IsBusy()){}

    CapSense_InitializeAllBaselines();

    for(;;)

    {       

        /* Place your application code here. */

        CapSense_ScanAllWidgets();

        while(CapSense_IsBusy()){}

        CapSense_ProcessAllWidgets();

        diff=CapSense_BUTTON0_SNS0_DIFF_VALUE;

        Pin_1_Write(1u);

        //Pin_2_Write(1u);

        CyDelay(1u);

        Pin_1_Write(0u);

        //Pin_2_Write(0u);

        CyDelay(1u);

        //CyDelay(1000u);

        //CapSense_Stop();       

        reg[1]=diff;

        //CapSense_Start();

    }

}

/* [] END OF FILE */

main2.c (based on example CE210291_CapSense_P4_One_Button01)

int main()

{ 

....

    /* Start EZI2C block */

    EZI2C1_EzI2CSetBuffer1(sizeof(reg), 1, (uint8 *)&reg);

    EZI2C1_Start();

....

    CapSense_Start();

...

    WDT_Start();

    for(;;)

    {

        /* Switch between sensor-scan -> wait-for-scan -> process -> sleep states */

        switch(currentState)

        {

            case SENSOR_SCAN:

                        ...

                    /* Scan widget configured by CSDSetupWidgetExt API */

                    CapSense_CSDSetupWidgetExt(CapSense_BUTTON0_WDGT_ID, CapSense_BUTTON0_SNS0_ID);

                    CapSense_CSDScanExt();

                    while(CapSense_IsBusy());

                    CapSense_CSDSetupWidgetExt(CapSense_BUTTON1_WDGT_ID, CapSense_BUTTON1_SNS0_ID);

                    CapSense_CSDScanExt();

                    while(CapSense_IsBusy());

                    ....

                    .....

                break;

            case WAIT_FOR_SCAN_COMPLETE:

              ...

                break;

            case PROCESS_DATA:

                interrupt_Write(0u);

                /* Set next state to SLEEP */

                currentState = SLEEP;

                /* process button widget */

                CapSense_ProcessWidget(CapSense_BUTTON0_WDGT_ID);

                CapSense_ProcessWidget(CapSense_BUTTON1_WDGT_ID);

                   ....

                    if( counts < CapSense_BUTTON0_SNS0_DIFF_VALUE)

                    {counts = CapSense_BUTTON0_SNS0_DIFF_VALUE; button = 0;}

                    if( counts < CapSense_BUTTON1_SNS0_DIFF_VALUE)

                    {counts = CapSense_BUTTON1_SNS0_DIFF_VALUE; button = 1;}

                    if( counts < CapSense_BUTTON2_SNS0_DIFF_VALUE)

                    {counts = CapSense_BUTTON2_SNS0_DIFF_VALUE; button = 2;}

                    ....

                    ...

                    if( counts < 11)

                    {button = 10;}

                    //else{interrupt_Write(0u);}

                    //CapSense_Stop();

                    //while(CapSense_IsBusy()){}

                    if(button == 0)     {reg[9]=1; Pin_1_Write(0u); Pin_2_Write(1u); Pin_3_Write(1u); Pin_4_Write(1u); Pin_5_Write(1u); Pin_6_Write(1u); Pin_7_Write(1u);                     Pin_8_Write(1u); counts=10;}

                    else if(button == 1){reg[9]=2; Pin_2_Write(0u); Pin_1_Write(1u); Pin_3_Write(1u); Pin_4_Write(1u); Pin_5_Write(1u); Pin_6_Write(1u); Pin_7_Write(1u);                         Pin_8_Write(1u); counts=10;}

                    else if(button == 2){reg[9]=3; Pin_3_Write(0u); Pin_1_Write(1u); Pin_2_Write(1u); Pin_4_Write(1u); Pin_5_Write(1u); Pin_6_Write(1u); Pin_7_Write(1u);                     Pin_8_Write(1u); counts=10;}

                    ....

                    ...

                        ...

                    else if(button == 10){reg[9]=0; Pin_1_Write(1u); Pin_2_Write(1u); Pin_3_Write(1u); Pin_4_Write(1u); Pin_5_Write(1u); Pin_6_Write(1u); Pin_7_Write(1u);                     Pin_8_Write(1u); counts=10;}

                    //CapSense_Start();

          ...

                break;

            case SLEEP:

          ...

                break;

        }

    } 

}   

*******************************************************************************/

void EnterDeepSleepLowPowerMode(void)

{

    /* EZI2C_Sleep routine should be called only after on-going I2C

    *  transaction is complete

    *  Enter critical section to lock slave state

    */

    interruptState = CyEnterCriticalSection();

    /* Check if I2C is busy. If so, skip deep sleep until I2C is free */

    if(!(EZI2C1_EzI2CGetActivity() & EZI2C_EZI2C_STATUS_BUSY))

    {

        /* Configure slave to be wakeup source */

        EZI2C1_Sleep();

        /* Enter DeepSleep. */

        CySysPmDeepSleep();

        /* WDT or any I2C communication wakes up device from deep sleep. */

        /* Configure slave for active mode operation */

        EZI2C1_Wakeup();

    }

    /* Enable interrupts */

    CyExitCriticalSection(interruptState);

}

....

I am detecting a voltage (present or not) from 5V USB connector. The measured voltage with plug connected is 5V in to a resistive divider.

The series resistor is 1k and 10k to ground with 1 100n cap across the 10k and also a 3V zener.

In creator I have set the pin to High Impedance. The voltage of the divider should be around 3V (4.5V is output but it should be clamped by the Zener to around 3V).

However, when I measure the voltage I only see 2.6V?

The pin being used is P4.0 and I have it creating an interrupt on change (high or low).

Hi,

I am working with the CYBLE-224116 extended range PSoC4/BLE module.  The module works great, however I am having a problem getting it to sleep the way the other PSoC4 devices do. 

With my other PSoC4 devices such as the CYBLE-014008, when I put the device into deep sleep, the power consumption follows the specification of 1.3uA. 

With this new CYBLE-224116 module, I am seeing a current draw of about 1.3mA @ 3.3V.  The only components I have attached to this module is a red and blue LED on pins P1[0] and P0[1] and a 1uF capacitor on VREF to ground.   I will attach the project to this thread as well so you can see that as well.  Below is my main.c which I am using to evaluate the module's low power.  Any thoughts would be greatly appreciated. 

Thanks.

- Chris

#include "project.h"

#define CYREG_SRSS_TST_DDFT_CTRL 0x40030008

int main(void)

{

    // Variables

    uint8   intrStatus;

    // Enable interrupts

    CyGlobalIntEnable;

    // Turn on the red LED for startup

    LED_RED_Write(1);

    LED_BLUE_Write(0);

    // Startup code

    CyDelay(500);

    // Disable the PA/LNA

    CY_SET_XTND_REG32((void CYFAR *)(CYREG_BLE_BLESS_RF_CONFIG), 0x0331);

    CY_SET_XTND_REG32((void CYFAR *)(CYREG_SRSS_TST_DDFT_CTRL), 0x80000302);   

    CSD_Write(0);

    CPS_Write(0);

    // Turn off the LEDs

    LED_RED_Write(0);

    LED_BLUE_Write(0);

    for(;;)

    {

        // Turn on the blue LED for 500 ms

        LED_BLUE_Write(1);

        CyDelay(500);

        LED_BLUE_Write(0);

        // Sleep the processor       

        intrStatus = CyEnterCriticalSection();

        CySysPmDeepSleep();

        CyExitCriticalSection(intrStatus);                 

    }

}

Hi,

The customer considers to use Low-Power CapSense Design As described in AN210998.

If he needs three buttons, what is the power consumption?
I have two ideas.

1)

2)

Which is correct?

I think that this may be misunderstood.
Please teach the correct answer.

Best Regards,

Inoue

Is there a document of PSoC4 startup procedure(like AN60616 about Psoc3 and 5LP)?

If No, please let me know the startup procedure simply.

Best Regards,

Inoue

I wired up P4.0 to analog input and found the 4200 only allows ADC on Port 2 (0..7) and thought I'd ask the question before re-laying up my PCB.

Is there any way to use a comparator or voltage monitor on this pin? I do not need the actual voltage but I need to generate a signal when battery falls below a certain value. (Like the LVD interrupt but I need it on the battery and not the micro supply voltage).

Thanks

My project has a couple of thermistors along with a few other analog values that need monitoring. All associated pins are high-Z Analog inputs with high initial drive (tried both), fed into a ADC_SAR_SEQ_P4_v2_50.
Now, I thought this would be a slam-dunk. I followed a number of examples - most of them agreed, so I made my project look like those.

But after starting a conversion and waiting for completion, I don't see any meaningful change in the data. I can measure voltage where the thermister comes into the board, and it is indeed changing.

I thought perhaps I needed external terminal for the pins, but it didn't seem to matter, and other examples don't typically use it. I'm not using a hardware trigger - documentation for ADC_Start() indicates it's a substitute ( ADC_FW_TRIGGER), and ADC_IsEndConversion() seems entirely happy.

I've uploaded an archive of the case where there are no external terminals for the pins, though that doesn't seem to matter.

I am in a quandary - can anyone tell me what bit I have messed up?

Thanks,
John