Posted on May 17, 2011 at 12:10My attempts at getting a simple PWM output on TCM5 leaves me baffled.
My Keil code on a 24MHz uPSD3434E is:-
PCACON1 = 0x00; // Disable PCA, use prescaled clock
CCON3 = 0x14; // 1:16 prescaler, PCA clock enabled
TCMMODE5 = 0x41; // fixed frequency PWM
CAPCOMH5 = 0x80; // nominal 50% duty cycle
PCACH1 = PCACL1 = 0; // zero the counter
// Set P4.6 for TCM5 use
P4SFS0 |= 0x40;
P4SFS1 &= ~0x40;
PCACON1 |= 0x40; // Enable PCA
I am not seeing any activity on P4.6 so I have missed something, perhaps others can see my obvious mistake.
To add a note: I assume interrupts are not necessary when operating the PCA for PWM output as all interaction is contained within the PCA hardware.
