Hardware PWM

Jonathan

Hi All,

Looking through the data sheets, I *think* I see that only the SX48/52 have hardware PWM. Is this correct?

Thanks,

Jonathan

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www.madlabs.info - Home of the Hydrogen Fuel Cell Robot

Post Edited (Jonathan) : 6/18/2005 5:10:46 PM GMT

Paul Baker

Yes you are correct that only the SX48/52 have internal timers capable of a hardware PWM. But the SX is so fast and it was designed to virtualize almost any traditional hardware feature (UART, SPI, I2C etc) that it isn't really a loss not having the hardware PWM. For an implementation of a 16 channel PWM virtual peripheral (meaning it works on the SX28 as well) look in the projects forum for Bean's post of the 16 channel PWM.

Jonathan

Thanks Paul, I'll look into that. Does that sort of routine have to be written in assembler, or is the BASIC fast enough?

Jonathan

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www.madlabs.info - Home of the Hydrogen Fuel Cell Robot

Jon Williams

Bean's project is written in SX/B which gets compiled to assembler -- you get the speed of assembly with the ease of BASIC.

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Jon Williams
Applications Engineer, Parallax