36 lines
974 B
C
36 lines
974 B
C
|
#ifndef PWMCLASS_H
|
||
|
|
#define PWMCLASS_H
|
||
|
|
#include "system.h"
|
||
|
|
#include "oneway.h"
|
||
|
|
static constexpr unsigned MAXPWM = 6000u;
|
||
|
|
/* Používá TIM2, PWM kanál 3, DMA1 kanál 2, přerušení DMA1_Channel2_IRQHandler */
|
||
|
|
class PwmClass {
|
||
|
|
static constexpr unsigned HALF_LEN = 24u;
|
||
|
|
static constexpr unsigned FULL_LEN = 2u * HALF_LEN;
|
||
|
|
volatile unsigned count;
|
||
|
|
uint16_t * const pL;
|
||
|
|
uint16_t * const pH;
|
||
|
|
uint16_t buffer [FULL_LEN];
|
||
|
|
OneWay<uint16_t> * src;
|
||
|
|
public:
|
||
|
|
explicit PwmClass () noexcept;
|
||
|
|
void attach (OneWay<uint16_t> & s) { src = & s; }
|
||
|
|
void send (const bool b) {
|
||
|
|
if (!src) return;
|
||
|
|
if (b) src->Send (pH, HALF_LEN);
|
||
|
|
else src->Send (pL, HALF_LEN);
|
||
|
|
if (count) count -= 1u;
|
||
|
|
}
|
||
|
|
void delay (const unsigned frames = 50u) {
|
||
|
|
count = frames;
|
||
|
|
while (count) {
|
||
|
|
asm volatile ("nop");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
protected:
|
||
|
|
void DmaInit () noexcept;
|
||
|
|
void TimInit () noexcept;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // PWMCLASS_H
|