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Hi Sakki,
A 50Hz square wave can be generated using a PWM of Time period = 20ms and duty cycle of 50%.
But the max voltage possible from PSoC is 5V.
Hence one way to get higher voltage, say 12V is using external transistor with Vcc of 12V.
Regards,
dasg
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Thank u very much for your reply..
there is a problem loading the project ..
the PWM block is not shown etc.
can u tell me steps to do it so that i can do it .
plz help
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I have already done some projects using PWM and counter, but im not able to produce a 20 ms time period wave(50Hz)
im only getting .2 microseconds..what should I do?
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CY8C38666AXI-040 ES2 production is the device i'm using.
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hi
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hi ,
Sakki is my brother as I told him he contacted for this project.
I'm deepak doing my B.Tech from Government.Engineering College, Kozhikode, Kerala, India.
I'm doing my final year project on PSoC. My group has already purchased the develepor kit from Cypress.
We have been working on PSoC 3 for the particular square wave output, but not able to produce 50Hz.
The project you have sent is not working in our software version, updation is required.
Would you please tell us how u configured the PWM block, and all step if possible.
My humble request to you. plz help us.
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The latest version of PSoC Creator is available here, http://www.cypress.com/?rID=39551. You can download the same and upgrade your software. Also to get started with your Square wave generation, there is an example project that already does it. This should help you with the same, http://www.cypress.com/?rID=38623.
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Hi Sakki,
First and foremost you need to upgrade the PSoC Creator to PSoC Creator 1.0 since the project I had attached before was done in this version.
Also, since the PSoC you are using is ES2, you need to choose the appropriate device.
For this, do the following:
1) Right click on the project name in workspace and go to 'Device Selector'.
2) In the Select Device tab, select the appropriate device you have on the processor module, and select the right 'Device Revision', which in your case is ES2. This is available at the bottom right corner of the tab.
Regarding the configuration of the PWM:
1) The clock used is 1MHz.
2) The PWM Period is set to 19,999 as period = (19,999 + 20,000)* 1 micro second = 20 ms (to get 50Hz frequency).
3) The Compare Value is set to 10,000 so that the the duty cycle is 50% as 10,000 / 20,000 = 0.5.
Let us know if this works.
Regards,
dasg
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Hi dasq,
I have obtained the square wave with the help of the project you have send earlier. We actually need complementary square wave of same amplitude to drive inverter circuit; but we are not getting the inverted square wave.
Used NOT, LUT etc. Some times we get the output and suddenly it dissappears. We need an amplitude between 2-4V for both the square waves.
Plz help..
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hi dasq,
Thanks for sending the project, hope this will work. But can u tell wat is our problem in obtaining this simple one.
Yesterday, we got it using LUT but it dissappeared, supply were not removed.
May be a problem of CRO, we will try it on DSO.
DSO is not familiar to us, but still have a try.
But still a huge work to be done on this project.
POWER INVERTER CUM INTE;LLEGENT BATTERY CHARGING SYSTEM
Need to program for intelligence.
Your friend U2 sugested some ideas, can u give us some ideas.
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Now ,my fist question is how can i communicate between " ADS1278 TO PSOC CONTROLLER (DVK-3) through "" SPI PROTOCOL..""
2.Before i write my another questions is .i want say something that what exactly i want to do in my project....In my project i want to send the some data from SIGNAL GENERATOR TO ADS1278(SIGMA DELTA ADC ) ...Than the data which in
" ADC" will given to the controller and than this data i'll be displyed on LCD...........thus every time data new data will send FROM SIGNAL GENRATOR TO ADC AND FROM ADC TO CONTROLLER(EX.89c51,pic controller,avr.ike that. BUT first priority in my project "PSOC CONTROLLER) And than from controller to LCD.........so sir plz have any code for interfacing than send on my mail id or any other necessary information which i need
3."Multi-Channel High Resolution Sigma-Delta ADC"...is my title of project so how can i start to write the SPI interface code for ADS1278 TO CONTROLLER" using C,C++.VHDL ,language,and currentl iam using PSOC CONTROLLER although if you will send the any data for regarding to "SPI INTERFACING code for 'ADS1278 TO CONTROLLER
I HOPE YOU WILL GIVE ME BETTRE RESPONSE AND AM WAITING FOR REPLY............
THANK YOU....
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Welcome in the forum.
It is not a good habit to hijack a five year old finished thread dealing with a completely different matter.
There is an SPI-Master component in Cypress Creator 3.3 to interface your ADS1278. The datasheet for the component (right click on it) tells a lot about SPI and shows all the APIs ready for you to use.
Bob