PWM

#define SysTick_BASE (0xE000E010) /*!< SysTick Base Address */ struct SysTick_t *SysTick = (struct SysTick_t*)SysTick_BASE; /*!< SysTick Struct Pointer */ struct SysTick_t { /*!< Offset: 0x000 (R/W) SysTick Control and Status Register */ int CTRL; /*!< Offset: 0x004 (R/W) SysTick Reload Value Register */ int LOAD; /*!< Offset: 0x008 (R/W) SysTick Current Value Register */ int VAL; /*!< Offset: 0x00C (R/ ) SysTick Calibration Register */ int CAL; }; unsigned int SysTick_Config(unsigned int ticks) { /* set reload register */ SysTick->LOAD = ticks / 2; /* set reload register - don't allow bigger than 2^24-1! */ SysTick->VAL = 0; /* Load the SysTick Counter Value */ SysTick->CTRL = 0b111; /* Clock source is processor clock, Enable SysTick IRQ, and enable SysTick Timer Counter */ return (0); /* Function successful but we won't check */ }