I am having trouble to use TIOA0 as the source for the 16-bit counter, hope someone can give me some ideas.

I want to know if it is possible to count transitions on TIOA0, I have not seen a single answer on how to do so and I can't get it to count.

In the clock chaning diagram it shows that TC1 and TC2 can take as an input TIOA0.

Therefore I am choosing TC1 and the MUX as follows:

*TCB_BMR = AT91C_TCB_TC1XC1S_TIOA0;

Then for the TCCLKS MUX I select XC1.

Enable and SWTRG the TC1 but it nover counts and the Mirror TIOA and TIOAB in the status register never change...


So I end up with TC4, PB0_TIOA3 and XC1.

Here is the code

//PIO
*PIO_PDR = AT91C_PB0_TIOA3; //define PB0 TIOA3 as peripheral
*PIO_BSR = AT91C_PB0_TIOA3; //select peripheral B

*PMC_PCER = (DWORD)(1 << AT91C_ID_TC4); //*** enable timer 4 clock over PMC

//Disable the clock and the interrupts before to configure it
*TC_CCR = AT91C_TC_CLKDIS;
*TC_IDR = 0xffffffff;

//Clear the status bit
dummy = *TC_SR;

*TCB_BMR = AT91C_TCB_TC1XC1S_TIOA0;

//Set the mode ;
*TC_CMR = AT91C_TC_CLKS_XC1;

//Enable the clock and start it with a software trigger
*TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;

What am I doing wrong?

Thx