mirror of https://github.com/JorjBauer/aiie.git
123 lines
3.5 KiB
C++
123 lines
3.5 KiB
C++
#ifndef _RA8875_T4_H
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#define _RA8875_T4_H
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#include <Arduino.h>
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#include <SPI.h>
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#include <DMAChannel.h>
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#include <stdint.h>
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#include "basedisplay.h"
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#define RA8875_WIDTH 800
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#define RA8875_HEIGHT 480
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#define _RA8875_WAITPOLL_TIMEOUT_DCR_LINESQUTRI_STATUS 20
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enum {
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RA8875_DMA_INIT=0x01,
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RA8875_DMA_EVER_INIT=0x08,
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RA8875_DMA_CONT=0x02,
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RA8875_DMA_FINISH=0x04,
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RA8875_DMA_ACTIVE=0x80
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};
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class RA8875_t4 : public BaseDisplay {
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public:
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RA8875_t4(uint8_t cs_pin, uint8_t rst_pin, uint8_t mosi_pin, uint8_t sck_pin, uint8_t miso_pin, uint8_t dc_pin=255); // dc pin is unused for this display but it's needed for the ILI and base class.
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~RA8875_t4();
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virtual void begin(uint32_t spi_clock=30000000u, uint32_t spi_clock_read=2000000);
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virtual void fillWindow(uint16_t color = 0x0000);
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virtual void setFrameBuffer(uint8_t *frame_buffer);
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virtual bool asyncUpdateActive();
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virtual bool updateScreenAsync(bool update_cont = false);
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virtual void drawPixel(int16_t x, int16_t y, uint16_t color);
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virtual void cacheApplePixel(uint16_t x, uint16_t y, uint16_t color16);
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virtual void cacheDoubleWideApplePixel(uint16_t x, uint16_t y, uint16_t color16);
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virtual uint32_t frameCount();
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uint8_t color16To8bpp(uint16_t color) __attribute__((always_inline)) {
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return ((color & 0xe000) >> 8) | ((color & 0x700) >> 6) | ((color & 0x18) >> 3);
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}
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private:
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void _initializeTFT();
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void initDMASettings();
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// These are the old style RA8875 calls -- replace them ***
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void writeCommand(const uint8_t d);
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void writeData16(uint16_t data);
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void _writeData(uint8_t data);
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void _writeRegister(const uint8_t reg, uint8_t val);
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uint8_t _readData(bool stat);
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uint8_t _readRegister(const uint8_t reg);
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void _waitBusy(uint8_t res);
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boolean _waitPoll(uint8_t regname, uint8_t waitflag, uint8_t timeout);
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void maybeUpdateTCR(uint32_t requested_tcr_state);
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static void dmaInterrupt(void);
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void process_dma_interrupt(void);
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protected:
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uint8_t _cs, _miso, _mosi, _sck, _rst;
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SPIClass *_pspi;
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IMXRT_LPSPI_t *_pimxrt_spi;
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SPIClass::SPI_Hardware_t *_spi_hardware;
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uint32_t _spi_clock; // desired clock
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uint32_t _spi_clock_read;
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uint32_t _clock; // current clock, used in starting transactions (b/c we have to slow down sometimes)
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// DMA stuff. The _dmasettings[] and _dmatx can't be member
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// variables. If they are, then the object will work if it's
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// statically allocated; but dynamically allocated RA8875_t4 objects
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// would be malloc()'d in RAM2, which is a problem for DMA.
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// So instead they're static globals in the module.
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// DMASetting _dmasettings[12];
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// DMAChannel _dmatx;
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uint32_t _spi_fcr_save;
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uint8_t *_pfbtft;
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volatile uint8_t _dma_state;
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uint32_t _spi_tcr_current;
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volatile uint32_t _dma_frame_count;
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protected:
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void DIRECT_WRITE_LOW(volatile uint32_t * base, uint32_t mask) __attribute__((always_inline)) {
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*(base+34) = mask;
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}
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void DIRECT_WRITE_HIGH(volatile uint32_t * base, uint32_t mask) __attribute__((always_inline)) {
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*(base+33) = mask;
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}
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/* These are old-style function names, but with new-style contents */
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void _startSend() __attribute__((always_inline)) {
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_pspi->beginTransaction(SPISettings(_clock, MSBFIRST, SPI_MODE3));
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_spi_tcr_current = _pimxrt_spi->TCR;
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// DIRECT_WRITE_LOW(_csport, _cspinmask);
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digitalWriteFast(_cs, LOW);
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}
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void _endSend() __attribute__((always_inline)) {
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// DIRECT_WRITE_HIGH(_csport, _cspinmask);
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digitalWriteFast(_cs, HIGH);
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_pspi->endTransaction();
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}
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};
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#endif
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