PSoC™ 4 Forum Discussions

This is on Kickstarter the first PSOC BLE app, and they have a dev kit also, looks like they have a small platform that has about 12 sensors on the board so you can do almost anything, check it out...

https://www.kickstarter.com/projects/1867719983/thingy-a-bluetooth-device-for-everyday-life-psoc-b?ref=discovery

I need to run a PWM block with a fixed clock and have that clock, along with the PWM signal available on output pins.

When I try to use the TCPWM block, it requires a cy_clock module, rejects my use of a FreqDiv.  So I configure a cy_clock to drive it and then can not get that connected to an external pin.

I see, in the datasheet, that there should be an advanced tab on the clock configuration that allows me to set the type to something that might be usable but that tab is not present. I'm guessing it's not available with the specific part I'm using (CY8C4245AXI-483 44-TQFP)

I also tried using a frequency divider to one of the PWM modules but had trouble making them work.

I really just need a basic PWM controllable output with the clock signal.

I apologize if this is a stupid question. Thank you for any help...

David

Hi, so here goes.... I have a sensor that i  talk to over I2C everything seems to be setup correctly as I'm able to query the device and get valid data over I2C, what i try to do next is put my device to sleep and then wake it up over I2C by utilizing the 

moduleName_sda_Write(uint8 byte)

moduleName_scl_write(uint8 byte)

as the spec requires SDA be held LOW for a certain amount of time. 

The problem i run into is it doesn't seem that my sda_write() is ever happening as im not seeing them on my logic analyzer and the device never wakens, anyone have any hints as to where  to look next?

so, I tried using the CyDelayUs() function, but it sucks (always delays something like 6us+whatever you pass the function). 

does anyone have a recommendation for delaying from single microseconds up to hundreds of micro seconds?  anything longer than hundreds of microseconds does not need to be that precise, but I want something that when I intend 3us delay, that I actually get 3us ±0.5us.  also, something that is robust enough to handle a change in core clock speed without needing to be re-coded for the new clock frequency.  is there anything like that in a library? 

should I just make a loop of nops?  if I make a loop of nops, how can I sample what my current cpu speed is, so I can adjust the loop to maintain accuracy? 

I'm curious for the CY8CKIT-042 dev board, but I also just bought a CY8CKIT-059 and would like a solution for both.