CCS/TMS570LS1224: timer (het driver)

Hello B.M

Are you using TI HDK or TI Launchpad? 

LS1224 Lunchpad: GIOB1 and GIOB2 are used for 2 user LEDs. I will show you step by step the timer configuration and GIO pin toggling.

1. Open HALCoGen, File->New->Project  We use "test" as the project name, and code is save to "c:\...\workplace_v10

2. Configure driver code generation:   

• Enable RTI driver
• Enable GIO driver
• Disable all others

3. Configure the VIM to enable RTI timer compare 0 interrupt

4. Configure RTI compare 0 period to 37ms

5. Save project and generate code

5. Open CCS, create a new CCS project to use the files generated by the HALCOGen the above configuration

    Use the same project name "test" as used in HALCOGen

6. open sys_main.c in source folder, then add code to blinky the LED

Thanks that’s really help

But i have a question  about the above code

Which function call the 37ms

Like in my code

delay(37ms);

Is there any mistake in my code?

I know it’s more easier to use RTI time

But also i wanna check my method of timer

Hello,

Using RTI is the easiest way.

In this configuration, the PLL=160MHz, the RTI clock 80MHz. 

There are two counter blocks in RTI module: counter block 0 and counter block 1. The two counter blocks provide the same basic functionality. Step #4 shows that we use counter 0 for compare 0.

Each counter block consists of 2 32-bit counters: up counter (RTIUC), and free running counter (RTIFRC). RTIUC counter is driven by RTI clock and counts up until the compare value in the compare up register (RTICPUC) is reached. When compare match (RTIUC = RTPCPUC), the free running register (RTIFRC) is incremented and RTIUC is reset to 0. So the frequency of the free running counter is: RTI clock freq divided by (RTICPUC+1). In this example code, the RTICPUC0=7, so the frequency of the free running counter is: 80/(7+1)=10 MHz.

RTI module has 4 compare register to generate interrupt to VIM. When free running counter (RTIFRC) matches the value in compare register, an interrupt is generated. Since the frequency of FRC is 10MHz, to generate a interrupt for every 37ms, 370000 should be write to compare register (step #4 picture).

So rtiNotification(uint32 notification) will be called very 37ms.

Your method can also generate 37ms delay, but it is as accurate as the 1st RTI method. One modification should be added to pwm notification function:

if (notification == pwmEND_OF_PERIOD)

   counter++;

i followed your steps in using rti but the led wasn't blinking

3058.rti_blinking.rar

hello 

i edited the code but still the leds are not blinking 

here is my code project id you please could have a quick look

4527.rti_blinking.rar