Hello,

 I have this new PSoC 5 FirstTouch starter kit and I have been play around with it. However, I can not find a tutorial session that will allow me to set up UART on this starter kit. I am wondering if anybody can help (guide) me through on how to set up UART on CY8C5588AXI PSoC 5 Device. I know so far how to get the UART component but as far as which pins need to be connect in order to enter ASCII through hyperterminal is where I am at the dead end. Thanks in advance for your help. I am the beginner of this product.  

Hi Doacn,

You can refer to the example project available along with the Creator.

Right Click on the UART component in the component Catalog and choose 'Find Example Project'.

You can Choose UART_Rx or UART_Tx for project on Receiving or Transmitting respectively.

However you can tweak around with this basic project to fit your requirement.

To make this project work for PSoC5, choose the appropriate device.

In Workspace, right click on the project and select 'Device Selector'.

In the 'Select Device' tab that pops up, select the PSoC5 device which is available on the First Touch Kit (which is most likely tot be CY8C5588AXI-060).

Now, choose pins appropriately in the .cydwr of the project. FTK has pinouts in the form of headers. P0, P6, 4 pins of P4, and 4 pins of P12 are available. Choose the Rx and Tx pins from any of these pins according to your convenience. There is no restriction on which pin to use for Rx and Tx.

Once this is done, you need to communicate with the PC. If you are using a virtual COM Port having TTL pins available, then you can connect those pins to the Rx and Tx of FTK directly and Voltage level shifter is not required.

Else, you need to use external MAX232 Voltage level converter to convert the voltage level of PSoC5 pins to RS232 level.

Let us know if this works.

Regards,

dasg

I was able to get a basic RX/TX working with the UART. However there's one thing thats got me flummoxed... The reset terminal on the UART block in the TopDesign.cysch is connected to a logic zero block. What if I want to assert a reset through software?

Thanks,

~Abhijit

Hi Abhijith,

The UART component can be controlled using Control Register.

You can connect a Control Register at the Reset Terminal and control it through software by setting the Control Register value to either High or Low.

This can be achieved using a Control register as shown in the picture attached. A control register can be connected to the reset terminal, it can be configured for 1 bit. Writing a one followed by a zero using the API, Control_Reg_Write() will reset the UART component. However note that the reset pulse needs to be long enough for reset operation to occur. Also the reset input is a synchronous reset, hence setup time requirement should be met.

The reset input is synchronous, requiring at least one rising edge of the component clock. Setup time should be added to guarantee not missing the reset signal.

Please go through the UART component datasheet if more information is required about timing constraints of the component.

 Picture attached now.

wonderful... thanks, both of you!

~Abhijit

Thanks Dasg,

  I am finally back on this project. I had done all the necessary steps using the PmodRS232 converter. However, I am not quite sure why I am not able to see the result through hyperterminal. I had done the necessary configuration in the hyperterminal, built and program into CY8CKIT. I am not sure what I am missing even I had followed through the steps. Any ideas that I might be missing?

Thanks in advance!

Doacn

 Hi Doacn,

I am also a beginner in this technology, PSoCs, in order to do my final studies project.

My objective is also to comunicate, through RS232, psoc with hyperterminal in windows xp. I have achieve to send data from hypert. to psoc but not backward. I have the level shifter MAX232, do anybody know how to configure TTL in order to avoid the use of the level shifter?

Doacn, have you achieved to send data in any direction?

Greetings!

Hi Fernan,
It is possible to use the standard circuit.
But it is more convenient to me to use a cable from old phone on PL2303 it has TTL inputs and outputs.
My PC doesn't answer only for the speeds 19200 (CY8CKIT-014)
I hope the circuit has no errors ;)
Successes in study!

 Hi pavloven,

Thank you for the schematic, I will check it as fast as possible.

Respect to the second option, it only consists in using this special cable (PL2303), doesn't it? I don't understand the explanation of Dasg, which says to use "a virtual COM Port with TTL pins available" and to connect them to the Rx and Tx, is it referring to the special cable PL2303 that you propose or something else?

Thank you!

Older phones like Samsung S220 Samsung C100 Samsun SGH X100 SAM300 and the Mot E365 and others had TTL Rx and Tx conclusions.

 they can be connected to a computer using a special cable that creates RS232_TTL. When you connect the cable to the PC creates a virtual COM port wrote about it Dasg.

If you have a similar cable as shown:

You should:

1. Install the driver:

http://www.prolific.com.tw/eng/downloads.asp?id=31

2. TTL Rx and Tx wire that connects to the phone connected to the Rx and Tx UART of CY8C5588AXI

I turned this cable into a universal device (Russian language):

http://mylab.wmsite.ru/moi-razrab/ustrojstva-na-usb/usb-rs232_ttl

And I did on CY8CKIT-014 PSoC ® 5 hardware for my simple single-channel oscilloscope:

PSoC_OSC_12bit.zip

There are other converters (FTDI 232, MOXA, etc) but I did not use them.

Good luck!

 

Ok,

Thank you pavloven!

I have understood it, but I don't have any cable like that, so I keep trying with the MAX232 that I already have. I hope my problem of comunication PSOC -> Hypert. isn't because of the converter.

Thank you another time!