DocID026335 Rev 1

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UM1763

Example I

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Example I

This is the first and the simplest example. The aim of the code is to build an equivalent

“Hello World!” application for the STLUX but trying to use also its strength point, the SMEDs.

In a few words the goal of the application is to configure the SMED 0 in order to drive the

output pin toggling at a fixed frequency and fixed duty cycle. As a results on the pin 1, there

will be an output signal toggling with a 50% duty cycle at a 48 KHz frequency.

The aim of the example is also to try to get familiar with the firmware development for the

STLUX and STM8 and learning how to drive peripherals through the APIs included in the

STLUX libraries. For this example in particular, the stlux_clk library APIs are used to

properly configure the SMED clock to the maximum frequency of 96 MHz. The stlux_smed

library APIs are used to start the SMED 0.

Another key component of the STLUX toolset, the STLUX SMED configurator GUI is used

here to set the SMEDs configuration. The designed SMED configuration can also be saved

in a *.prj format file. In particular in this example only the SMED 0 is used and it is

configured according to the scheme in Figure 1 generated using the tool and saved in the

PWM_Smed0.prj file.