Setting latx instead of portx before trisx

[bmoe79]

Thanks Henrik.
Of cource it should be %00000000 to set as outputs, hjärnsläpp.
I do like below @ 64mHz, but no capcitive load, and all A/Ds is off. I'll just use latx.
porta.0 = 1
porta.1 = 1
porta.2 = 1
porta.3 = 1

[HenrikOlsson]

Hi Matias,
Yes, when you do things like that

porta.0 = 1
porta.1 = 1
porta.2 = 1
porta.3 = 1

Running at high speed can cause RMW issues. What happens is that for each "bit-flip" the port is read, bit is flipped, port is being written.
Because the "limited" current capability of the output driver the voltage at the output doesn't rise instanously. So when PORTA.1=1 executes and the port is read the voltage at PORTA.0 hasn't reached a voltage above the threshold for a logic high so when the port is written back after flipping bit 1 bit 0 will be re-written as 0.

/Henrik.

[Ioannis]

So the recommendation is not to do consecutively bit operation but one port write.

for example:

temp=porta
temp=temp & $FF
porta=temp

Ioannis