mirror of https://github.com/JorjBauer/aiie.git
98 lines
2.5 KiB
C++
98 lines
2.5 KiB
C++
#ifndef _RA8875_T4_H
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#define _RA8875_T4_H
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#define SCREEN_DMA_NUM_SETTINGS 3
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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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#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 {
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public:
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RA8875_t4(const uint8_t cs_pin, const uint8_t rst_pin, const uint8_t mosi_pin, const uint8_t sck_pin, const uint8_t miso_pin);
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~RA8875_t4();
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void begin(uint32_t spi_clock=30000000u, uint32_t spi_clock_read=2000000);
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void fillWindow(uint16_t color = 0x0000);
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void setFrameBuffer(uint16_t *frame_buffer);
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bool asyncUpdateActive();
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bool updateScreenAsync(bool update_cont = false);
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void drawPixel(int16_t x, int16_t y, uint16_t color);
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uint32_t frameCount();
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private:
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void _initializeTFT();
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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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boolean _waitPoll(uint8_t regname, uint8_t waitflag, uint8_t timeout);
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protected:
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uint8_t _cs, _miso, _mosi, _sck, _rst;
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volatile uint8_t _interruptStates;
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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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uint8_t _spi_num;
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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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volatile uint32_t *_csport;
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uint32_t _cspinmask;
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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; -- do we need this? related to the _dc line... */
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// DIRECT_WRITE_LOW(_csport, _cspinmask);
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digitalWrite(_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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digitalWrite(_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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