Issue accessing TIMER1 register CR2

(4 posts) (2 voices)

sokrasins
Member

Hi all,

I'm having some trouble accessing the CR2 register of TIMER1. At the line

TIMER1->regs->CR2 |= 1<<8;

the compiler throws an error "error: base operand of '->' has non-pointer type 'timer_reg_map'". This is very confusing to me, as a similar bit of code for the ADC,

ADC1->regs->SR ^= 1<<1;

will compile perfectly, and the variable all seem to be of similar types. I've poked around in the timer.h source and on the forum, though I haven't been able to find the source of my problem yet. I would appreciate some help! I'm new to developing in C and using the unix toolchain, so I apologize if it's a trivial issue.

Thanks in advance!

Posted 4 years ago #
mbolivar
LeafLabs

See the timer documentation:

http://leaflabs.com/docs/libmaple/api/timer.html#types

What you want is

(TIMER1->regs).adv->CR2 |= 1 << 8;

Or, since you already know you're using timer 1,

TIMER1_BASE->CR2 |= 1 << 8;

Posted 4 years ago #
sokrasins
Member

Ahh, you know what, I just figured it out. After looking through the source again, I figured the correct way to access CR2 on TIMER1 is

`TIMER1->regs.adv->CR2 |= 1<<8;'

because of the different register components of the different classes of timers.

Posted 4 years ago #
sokrasins
Member

Thanks mbolivar! I'm still learning the C notation, so I'm still sorting out some of the the basic notation.

Posted 4 years ago #

Reply

You must log in to post.