PSoC™ 4 Forum Discussions

I'm using a CY8C4247 with a CAN bus.  I have several mailboxes set up.  Some are standard identifiers. Some are extended identifiers.  Depending on a value read from EEPROM I'd like to enable only one mailbox at a time.  I'm assuming I could just turn off the IRQ for all the unnecessary mailboxes.  I've tried using the CAN_RX_INT_DISABLE macro but it didn't work.  Any help will be greatly appreciated!

Hi,

We are planning to use CYBLE-012011 on on of our future products. The board will need BLE connection, ADC readings and also DAC outputs. I see that CYBLE-012011 has 2 current DACs but I have not used IDAC before.

In the datasheet, it says that IDAC can output up to 612uA current. We need an analog output between 0V to 10V for one of our analog ICs. Can we just connect a 20k Ohm resistor from IDAC pin to ground in order to get a 12V output (612uA X 20kohm = 12,240Volts)?

I don't have much experience on DACs, can these IDAC pins work without harming the internal circuits when there is 12V between this pin and ground? Normally absolute maximum value is 3.8V (VDD +0.5) for GPIO pins. But there will be 12V at this pin if we connect a resistor from this pin to ground and give the maximum current output (612uA).

Regards,

Abdullah.

Hi there,

I am currently working on a project with a PSOC 4200 BLE but I do not use the BLE part.

My Psoc should put a String to a HM-10 Module and then Receive an answer.

So I put a string over my UART to the HM-10. -> "AT"

The answer I am getting is "OK", which I was expecting.

But as soon as I change the buffer size over 4, which I need to because now I want to send 8 characters and receive around 12 to 14 characters.

I know I need an Interrupt for this but I don't know how to implement one because I don't get the difference between the internal and the external isr.

As well as I don't know if I need an isr on my tx because it is also greater than 4 byte.

I know there must be an easy solution to this but I just can't find it.

Is there anyone who ones how to handle this?

If needed I can upload my code.

Thanks for your help

Chris