PSoC™ 4 Forum Discussions

I am looking for an expert advice on how to decode 2 asyncronous pulse streams with a PSOC4 BLE.

I have 2 signals with a strange proprietary protocol. The maximum pulse length is 200µs and the minimal pulse length 10µs. I need to measure the pulse length with at least 1,5µs resoluton.

Now I am looking at the most efficient use of internal resources to archeive this with the minimul amount of CPU time possible (the CPU needs to handle the BLE communication and this shouldn't interfere with the measurements).

What would be the "best" timer configuration for this?

The CapSense component uses interrupts that trigger after each sensor scan is complete.
Is there anything you have to pay attention to in the user application in order not to disturb this interrupt?

For example
Do not use interrupts with higher priority than CapSense interrupt.
There is a limit on the processing time of user interrupts with higher priority.

I need to implement BPSK modulator and demodulator and I'm having a few issues.

1) Is there a way to trigger DMA channel without use of PWM? It just doesnt let me connect clock directly to triger input.

2) I can't seem to find any substitution for Analog Mixer. Is there a way to implement his function with some other component?

I'm _very_ new to PSoc, so I'm going through Alan's tutorials. Tutorial #3 - I have an LED and a switch left over from Tutorial #2, which worked. So the ports are there. I set the input pin (cleverly named Pin_SW) up for interrupts, and after compiling to build the API set, I see Pin_SW_ClearInterrupt, Pin_SW_Handler, and several other API names, but I do not see Pin_SW_Int_Startex. That _ClearInterrupt and _Handler are defined at least implies that PSoC Creator knows it's an interrupt. The tutorial certainly suggests the function will be generated.

Any hints for the newbie?

Thanks,
John