PSoC™ 4

HI all,

I have been developing a small board and application for CY8C4245 using I2C bus.

unfortunately, due to the current supply chain problems, we had to select a 4745 for our design, so we can release the product much sooner.

I configured the I2C exactly the same way as the 4245 in PSoC creator, but I have problems with the communication with 4745.

I have looked at everything I could but can't figure out why it doesn't work the same way... 😞

Am I missing something?

Hi.,

Please Help Me in resolving Debugging Issue., When I'm Trying to load project, it's thronging error Like "Project Name Already started Please terminate it and reload"., How can I terminate and Reload it Once again., 

Please Find Bellow attachment for Exact query.,

Thanks

Srikanth

Hello,

I am having some problems in setting up the CAN bus on my CY8C4147AZI-S475 MCU.

I think my issue is configuring the clock correctly.  As far as I can see in order to get the accuracy required to run CAN at 500 kbps I should have a clock accuracy of less than +/- 0.5%, but the native clock is +/- 2%. The data sheets mention using the more accurate WCO to help configure this but I cannot see how to do this.

Any help would be much appreciated.

Hello,

We can see the sample code for the low power mode in PSoC 4 Serial Communication Block (SCB) datasheet.

According to this, it is recommended to set the PRIMASK register using CyEnterCriticalSection before entering CySysPmDeepSleep. However, even in CySysPmDeepSleep, CyEnterCriticalSection is used to set the PRIMASK register. In other words, the PRIMASK register is set twice.

Is it okay to recognize that the PRIMASK register is set with "uint8 intState = CyEnterCriticalSection();  ...................... (1)" and cleared with ”CyExitCriticalSection(interruptState);  ...................... (4)"?

Please see the code below.

---------------------------------------------------------------------------------------------------------------------------------

/* Enter critical section to lock the slave state */
uint8 intState = CyEnterCriticalSection();  ...................... (1)
/* Check if slave is busy */
status = (SCB_I2CSlaveStatus() & (SCB_I2C_SSTAT_RD_BUSY | SCB_I2C_SSTAT_WR_BUSY));
if (0u == status)
{
    /* Slave is not busy: enter Deep Sleep */
    SCB_Sleep(); /* Configure the slave to be wakeup source */
    CySysPmDeepSleep();

    /* Exit critical section to continue slave operation */
    CyExitCriticalSection(intState);   ...................... (2)
    SCB_Wakeup(); /* Configure the slave to active mode operation */
}
else
{
    /* Slave is busy. Do not enter Deep Sleep. */
    /* Exit critical section to continue slave operation */
    CyExitCriticalSection(intState);
}

---------------------------------------------------------------------------------------------------------------------------------

void CySysPmDeepSleep(void)
{
    uint8 interruptState;

　　　........

    interruptState = CyEnterCriticalSection();  ...................... (3)

　　　........

    CyExitCriticalSection(interruptState);  ...................... (4)
}

Best regards,

Yocchi 

Hi.

I'm now using 3 proximity sensors on 4000s MCU (CY8C4025LQS-S411).

The problem I'm facing now is that the raw count will rise unexpectedly (Proximity sensor 1&2 → Graph 2&3) after the board is powered on and it takes a few seconds to be stable. What I want is that it can be operated once powering up.

As shown in the graph below, Proximity sensor0 (Graph1) seems OK, while the others perform bad.

It troubles me a lot and is there any way to improve it ?

sensor0

sensor1

sensor2

Best Regards.

hi

I'm using cy8ckit-042-ble-a to do experiments now, and created a new PSoC_4_BLE_CapSense_Slider_LED01 routine, but now I can't lunch tuner after building and program. Please help me.

Hi,

I have learned that using CyDelay in a BLE program makes the iOS device disconnect from the PSoC. So now I use a Timer module that repeats every 1 millisecond (IMO clock frequency = 24 MHz). However, I am unable to do precise timings in microseconds that was previously done using CyDelayUs. What I need to do is make a stepper motor go 700 us ON, and then 1 us OFF.

How do I accomplish this using the Timer module?

Thanks,

AC

Hi, 请问

1》函数 void Clock_1_StartEx(uint32 alignClkDiv)参数 是分频值吗？看解释好像不是，请问这个有什么用法？

2》 如果对clk分频用Clock_1_SetFractionalDividerRegister（）吗？

3》现在uart要更改波特率，看communite里是接一个clk在uart module上，然后用Clock_1_SetFractionalDividerRegister分频.  假设 外部频率是12M，over sample是12， 如果要用9600波特率是不是Clock_1_SetFractionalDividerRegister（103,5）？

4》 现在UART模块CLK 为1152000HZ， over sample为12，  Clock_1_SetFractionalDividerRegister（9,0）是否可行？现在测试UART接收不正常，请问是实现方式不正确吗？还是参数不正确？  Clock_1_SetFractionalDividerRegister函数调用在uart初始化前调用是否正确？

Hello,

I have implemented the CY8C4147AXI-S455 on a board and use the I2C bus on pin 18,19 as a master. This master sends only command to a slave implemented on an Arduino mega board.  No read access are performed.  

The clock is 100kHz.  Pull-up resistors are 4,75k. Both boards are supplied with a common +5V. 

As long as I tested I2C messages  sent by the master without slave connexion I could see  proper signals on data and clock.  Of course NACK was detected. 

When I connect the arduino board, then no signal are detected : SCL is  forced to 0 and SDA forced to 1.  No clock and data activity. 

Then when I disconnect the arduino board, SCL remains permanently low and SDA high.  The bus does not work anymore.

Is the bus definitely out of order?  What happened?