Timer interrupt on LM4F120 using TimerIntRegister issue

[madias 0]

I dont know, what I'm doing wrong, but if  I just paste the code above https://gist.github.com/robertinant/10398194 I'll get following compiler error:

 

sketch_apr16a.ino: In function 'void initTimer()':

sketch_apr16a.ino:24:55: error: 'ROM_TimerIntRegister' was not declared in this scope

[energia 485]

I have updated the Sketch:

https://gist.github.com/robertinant/10398194

 

I blindly prefixed all API calls with ROM_ and did not compile the Sketch to verify. It turns out there is not a ROM_TimerIntRegister.

[madias 0]

Thank you!

Now the sketch runs without problems, I even started 2 timers simultaneously (TIMER0 and TIMER1) with different HZ and it works like a charm! (tested with an oscilloscope). Is there an easy description for the tiva timers and the indifferences with energia (think of delay, PWM, tone and so on)? The Arduino community has something the good way, as an example: http://arduino-info.wikispaces.com/Timers-Arduino

[energia 485]

I don't know of any TivaC Timer tutorials out there but the TivaC Peripheral Driver Library Users Guide (aka driverlib users guide) is a good source for the API's:http://www.ti.com/lit/ug/spmu298/spmu298.pdf

 

The main forum might have some pointers to tutorials.

[madias 0]

Thank you for your hint with the TI-API document (shame on me not reading this before).

One thing is not clear to me: The "ROM_" prefix.

As I read for example the part of the timer description I see:

TimerConfigure(uint32_t ui32Base, uint32_t ui32Config)

but in a energia example code (above) i see:

 ROM_TimerConfigure(TIMER0_BASE, TIMER_CFG_PERIODIC); 

 

So how is this "ROM_" prefix to understand?

 

thank you

Matthias

[madias 0]

Ok, answer is in Chapter 29.2. Direct ROM calls.

[CorB 64]

Currently this is chapter 35.2 in this document

 

http://www.ti.com/lit/ug/spmu298a/spmu298a.pdf

 

cheers

CorB