Direct Port & Register Manipulation

Using Arduino Project Guidance
21

If you have to toggle I/O pins, a write to PINx with the bits to toggle is the fastest way.

The register access is halfed, there is no if involved and the code is much smaller.

22

Thanks man

i also attach some nice articles

http://tronixstuff.com/2011/10/22/tutorial-arduino-port-manipulation/

23

Get yourself a cheap chinese clone of the analyzer to look at the timing yourself.

You can get them below 7 € shipping included and they work very good, at least mine does.

24

Whandall , what an incredible change ! very happy with the results.

i have a part in my code that does analogRead A6 and A7

for example
#define rssiPinA A6
#define rssiPinB A7

for (uint8_t i = 0; i < RSSI_READS; i++)
{
analogRead(rssiPinA);
rssiA += analogRead(rssiPinA);
analogRead(rssiPinB);
rssiB += analogRead(rssiPinB);
}

is there any possibility to use the manipulation in order to Read those pins Even Faster?

25

They are analog input only, they have to go thru the analog mux to get a reading. They don't have a digital input to take advantage of direct port manipulation.

You can take some steps to read them with less resolution, like 8 bits vs 10, if you are only looking for a high/low input.

26

what about that.....

http://www.microsmart.co.za/technical/2014/03/01/advanced-arduino-adc/