//
// picostrip.h
//
// ILEDStrip on RP2040 / RP2350, driving WS2812B from a PIO state machine.
//
#ifndef _picostrip_h
#define _picostrip_h

#include "ledstrip.h"
#include "hardware/pio.h"

class CPicoLEDStrip : public ILEDStrip
{
public:
	CPicoLEDStrip (unsigned nLEDCount, unsigned nPin);
	~CPicoLEDStrip (void);

	bool Initialize (void) override;

	unsigned GetLEDCount (void) const override	{ return m_nLEDCount; }

	void SetLED (unsigned nIndex, uint8_t nRed, uint8_t nGreen, uint8_t nBlue) override;

	bool Update (void) override;

	bool Blackout (void) override;

private:
	// Blocks until the strip has latched, so a caller cannot start a new
	// frame inside the reset window.
	void WaitForLatch (void);

private:
	unsigned  m_nLEDCount;
	unsigned  m_nPin;
	uint32_t *m_pBuffer;		// one GRB word per LED, left-justified

	PIO	 m_PIO;
	unsigned m_nSM;
	unsigned m_nOffset;
	bool	 m_bInitialized;

	uint64_t m_nLastFrameUs;
};

#endif