PSoC™ 4 Forum Discussions

Hello,

 I am connecting the PSoC CY8CKIT-042 board's SPI interface to a SPI master device, the HFCLK is 48Mhz, the SPI master clock is 8Mhz,

the PSoC 4 is SPI slave, the SPI works on Motorola mode, the SCLK mode is "CPHA = 1, CPOL= 1", in this configuration, the SPI master always receives wrong MISO data from PSoC 4200 chip.

 After i measured the SPI signals by a logic analyzer, i found the SPI MISO signal had big lantency, the lantency is about 80-90ns which assert after next clock rising edge, so the SPI master can not launch correct MISO data.

 Look at the datasheet of PSoC 4200, the following AC Specifications of SPI Slave Mode:

Spec ID Parameter Description             Min Typ Max Units

SID171 TDSO MISO valid after Sclock driving edge – – 42 + 3 ×Tscbclk  ns

 By my understanding, this SID171 means the MISO lantency may be the maxium 104.5ns.

 Is is correct for my case? Is the PSoC 4 SPI slave not possible to get working on 8Mhz clock?

Thanks,

-Charlie

hello, I have a doubt .. I am working with the CY8CKIT-0420BLE  kit and the device used in my project is the CY8C4247LQI-BL483 .I am working with the ADC component and uses teraterm for recieving the commands for the ADC.

how do multiple pins ( say p1.4 , p3.0) serve the same functionality say uart_rx?

if I have connected my uart rx pin ( in the project) to p1.4 (in .cydwr) , and connect p3.0 for one ADC channel input, I assume the UART recieving will happen correctly.

If nothing is connected to p3.0 the teraterm works fine, but if a wire is connected between P3.0(J2) and the Gnd,and then try to read the analog channel 0(p3.0) the teraterm stops working..

if i repeat the same for other ADC channels, ( ADC_ch_1 at p3.1, ADC_ch_2 at p3.2) the teraterm works fine and the analog voltage is read as 0.

Can anyone guess what makes the teraterm stop?

is it because that both pins can be used as uart_rx?

Hi;

I have observed that there is no measurement instruments in PSoC creator 4. I designed a circuit and                                                                     wanted to monitor my current and voltage, but it looks like there is no multi-meter in PSoC 4 Gui.

Is there any possibility to monitor your design or is there any other cypress product which has that functionality ?

May anyone provide me a sample of code to handle an interrupt on an external pin that coexists with DeepSleep mode?
Compared to previous versions Psoc Creator 4 has introduced some difference in this regard ?

TNX

Hello, I have recently purchased the CY8CKIT-044 PSoC® 4 M-Series Pioneer Kit and having a great time learning how to do simple projects. I am trying to write a simple program to interface with a 74HC595 Shift Register to control 8 LEDS. The HC595 has a Clock input, a Serial Data Input and a Latch. I am trying to use the Shift Register in the PSoc Creater and need some help with the top schematic. I have uploaded my top schematic for review. I want to know how I can create a bursted clock that will be used to clock in the data the the HC595. I have tried to use the Clock component from the SYSTEM group and connect it to a Digital Output pin but it won't compile. If anyone could give me some suggestions of know of an example that uses an Shift Register please let me know.

Thanks,

Joe

Hello, 

I am using cypress CYBL10161-56LQXI. I am using I2C as a slave. I have a problem that after my slave sends the desired data, in the next cycle when master asks the slave if any data is available and if there is no data available, the cypress sends 0xff,0xff....[Buffer length].

I am using this, 

            strncpy(i2cReadBuffer,"abcd",sizeof("abcd"));
                  
        if(0u != (I2C_I2CSlaveStatus() & I2C_I2C_SSTAT_RD_CMPLT))
            {
                
                   // Clear slave read buffer and status 
                      I2C_I2CSlaveClearReadBuf();
               (void) I2C_I2CSlaveClearReadStatus();
              
            } 

So here, master would receive abcd first then it receives 0xff,0xff.... It would be great if you could help me out with that.

Thanks.