PWM on TMS570 Using Assembly

DWT

Other Parts Discussed in Thread: HALCOGEN

Greetings.

I am currently writing assembly code for the TMS570. I would like to generate two PWM signals @ around 5kHz to drive two motors. In using other processors such as the PIC, I have always either used Output Compare or dedicated PWM modules. I need some guidance on how to implement PWM on the TMS570 using assembly code.

Any help would be appreciated.

Regards,

Willis

over 13 years ago

0 Luc Baudoin over 13 years ago

TI__Intellectual 1125 points

Hello Willis,

The High End Timer (NHET) is the best communication module to generate PWMs. The NHET comes with an IDE that can be found here: http://www.ti.com/tool/het_ide

In the IDE, under the Edit menu there is an "Insert PWM" option asking for input clock, clock ratios, etc... and generates the nearest possible PWM.

Here is an exemple of NHET asm code:

L00 CNT {reg=A, max=624, data=0}
L01 ECMP {next=L00,hr_lr=HIGH,en_pin_action=ON,pin=1,action=PULSELO,reg=A,data=312,hr_data=64}

Once the code generated and assembled it creates a source c file and a header file to add to your project.

Best regards,

Luc Baudoin

0 Luc Baudoin over 13 years ago in reply to Luc Baudoin

TI__Intellectual 1125 points

You can also use HalCoGen, the NHET has a tab for generating simple PWMs.

http://www.ti.com/tool/halcogen

0 DWT over 13 years ago in reply to Luc Baudoin

Intellectual 260 points

Thank you for the advice.

Willis

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PWM on TMS570 Using Assembly