Software

AN3208

14/19

Doc ID 17411 Rev 1

Figure 12.

Main program flow

CLK_Init(): Is the clock initialization routine. For this application solution, an HSI clock has

been used. The CPU frequency is 16 Mhz.

I/O Init(): Is the GPIO initialization routine. I/O pins dedicated for stepper motor driving are

configured in output push-pull mode.

TIM1_Init(): Is the initialization routine of TIM1. TIM1 is configured in “PWM edge alignment

mode” providing four PWM signals at 60 Khz.