Fixing captures

Now that all the capture ISRs are going, I need to make them all read the same thing.

The first thing that I will do is try to only use cap3 isr to see if it has anything to do with them interfering.

// 3 enabled, rising and falling, all on timer 1: 0001 0110 1111 1100 = 0x16FC
EvaRegs.CAPCONA.all = 0x16FC;

CAP3 works now, so there is something happening to do with interference.

I will try just CAP2 by setting CAP1EDGE to "no detection" (0).


// 1,2,3 enabled, 2 - rising and falling, 1 and 3 - no detection, all on timer 1: 0011 0110 0011 0000 = 0x3630
EvaRegs.CAPCONA.all = 0x3630;


CAP2 works!

Now try just CAP1 and CAP2:

// 1,2,3 enabled, 1,2 - rising and falling, 3 - no detection, all on timer 1: 0011 0110 1111 0000 = 0x36F0
EvaRegs.CAPCONA.all = 0x36F0;

Both work!

Try CAP1 and CAP2 on timer1 and CAP3 on timer2

// 1,2,3 enabled, 1,2, 3 - rising and falling, 1,2 timer1, 3 - timer2: 0011 0010 1111 1100 = 0x32FC
EvaRegs.CAPCONA.all = 0x32FC;

CAP1 and CAP2 work but CAP3 does not

Try just CAP3 with timer2 by itself

// EVG 5-19
// 3 enabled, 1,2, 3 - rising and falling, 1,2 timer1, 3 - timer2: 0001 0010 1111 1100 = 0x12FC
EvaRegs.CAPCONA.all = 0x12FC;

does not work but that is probably because I have not set up timer2

guess:

// EVG 5-5
EvaRegs.GPTCONA.all|= 0x0049; // GP Timer 1/2 Counting upward
EvaRegs.T1CON.all = 53312 + (1-1)*256; // Set up capture timer - Continuous-Up Count Mode
EvaRegs.T1PR = 0xFFFF; // Set up timer period
EvaRegs.T2CON.all = 53312 + (1-1)*256; // Set up capture timer - Continuous-Up Count Mode
EvaRegs.T2PR = 0xFFFF; // Set up timer period


excellent CAP3 works now - try to enable 1 and 2 again on timer1.

// 1,2,3 enabled, 1,2, 3 - rising and falling, 1,2 timer1, 3 - timer2: 0011 0010 1111 1100 = 0x32FC
EvaRegs.CAPCONA.all = 0x32FC;

does not work - everything goes crap again.

Maybe everything is not running fast enough - try checking the PLL setup

the InitPll function that inititalised the PLL is in DSP281x_SysCtrl.c

at the moment it is being sent 1010 as DIV which muliplies the clock time by 5.

InitPll is called in InitSysCtrl(void) which is also in DSP281x_SysCtrl.c

InitSysCtrl is called in initBoard which is called the main program before the main inititalise funtion. That means that I may be able to overwrite that value for VAL in my system initialise function.

I managed to do the overwrite, however now isrXint2 does not work.

// re Initialize the PLLCR to 0x0 from 0xA
InitPll(0x0);

Upon consideration, that is because the clock was previously running at its maximum speed.

The other thing that I can do is to get rid of the divides in the isr to speed them up.

I have got rid of the divides but for some reason, now IPWM3 is not working

IPWM3 was still on timer2

ALL IS WORKING NOW!