PSoC™ 5, 3 & 1 Forum Discussions
Hi,
I'm trying to use an ADC sigma delta which converts an analog signal with amplitude between 0-5 Volts. I don't understand how to set the ADC reference : in fact when I select the input range VSS-VDDA the reference automatically is set to 1.25 V , that is not the right value for me because in this way i would convert a signal with an amplitude greater than the reference. How can i do?Can someone help me?
Show LessI am working on a project that measures an analog output from a solar radiation sensor. I am a novice and have some confusion about the various settings for the Delta Sigma ADC. It seems that, depending on the buffer mode, I get wildly different readings, even when the gain is set to 1. Bypassing the buffer seems to provide me with the most reasonable readings, but still not accurate. Using a voltmeter, I measure values of around 1500 microvolts, yet the ADC spits out a reading of only about 600 microvolts. Changing the conversion mode didn't make any difference to the readings, and dropping the sampling rate of course only slowed down the update interval.
Has anyone run into issues like this before when trying to use the delta sigma ADC at low amplitudes? The ADC works just fine when I connect the pins to an external voltage source that is much greater (1.5V instead of less than a millivolt), but I think the ADC may be having issues due to the low magnitude of what I'm measuring
I've attached a screen shot of my configuration and my sampling code is below, though it's not much different from the sample project on creator
ADC_DelSig_Start();
ADC_DelSig_SelectConfiguration(ADC_DelSig_CFG1,1);
ADC_DelSig_StartConvert();
CyDelay(100u);
for(i = 0; i < 100; i++)
{
if(ADC_DelSig_IsEndConversion(ADC_DelSig_WAIT_FOR_RESULT))
{
output = ADC_DelSig_CountsTo_uVolts(ADC_DelSig_GetResult32());
break;
}
CyDelay(5u);
}
ADC_DelSig_StopConvert();
Show LessAre the Cy8CKIT-050 and Cy8CKIT-029 supposed to be compatible?. Seems like there are some hardware pin conflicts with the 7 segment parts. Pins p1-0-p1-3 are used in the 029 kit for 7 segment but are unavailable in the kit due to being used for debug.
Show Lesshi..
I have been using CY8C-kit-030 for my project purpose......but, today mistakenly i have given 5V through one of the GPIO pin of my kit (Whose vddio was set to 3.3V)....In response to it my processor is getting heated when i am trying to connect it to PC through USB....and when i am trying to port my code into the processor it is asking to select the debug target......
so, i realized that my processor gets damaged......am I right??
and i am planning to buy the new piece of CY8C3866-040 AXI....
Can any one please tell me......its availability in INDIA....and which is the best way to get it.....
In Cypress website i have seen that its cost is 12.34$ and shipping is free.......Is it applicable to shipping to INDIA?
Thank you.
Show LessI want to use capsense slider and buttons to amplify a voltage waveform that I am getting externally.
I am not able to think what might be needed.
My problem statement is as follows: I need to take a waveform and depending on the slider position, amplify it. Everytime the capsense buttons are pressed, an offset is added to the voltage waveform.
For now, if I can display the amplified and offset adjusted waveform, it shall be enough
Any help will be highly appreciated.
Show LessI am having some issues with non-linear and inconsistent readings off the Sigma Delta converter.
My circuit uses a resistor ladder to attenuate a high DC voltage. That is buffered with an INA217 amplifier. The readings off the amplfier measure in a near linear fashion.
I am having a problem with the converter. It always reads a few milliviolts below what my meter reads. This variation changes with different voltage readings, especially over a large range.
The amplifier circuit is pretty linear, so it is safe to say the problem is the converter.
I read about a similar problem on another thread regarding analog routing and the voltage reference. I have the converter set:
Range 0-1.024V
Internal 1.024V reference.
16 bits at 48ksps.
What is going on?
Show LessHello guys, I am a newbie when it comes to PSoC. I want to interface an ADXL335 accelerometer with PSoC3(CY8CKIT-030). Can anyone suggest me how to do so?
Show LessI have the need to save an array into non-volatile memory so that I can maintain my data through power cycles. I have seen the EEPROM module and have considered using this but I am unsure of the operation of this module. I am attempting to accomplish the following:
I would like to save an array into non-volatile memory.
I would like that memory to be reloaded when the power returns.
Thanks for the help!
My current design uses a PSoC3 and Microchip RN42 Bluetooth module. I haven't been using a series resistor on the UART lines between the two devices, but I see a lot of design that do use series resistors between digital communication lines.
Should I include series resistors between PSoC and BT module? Looks like the RN42 can handle a max of 5mA per pin.
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