avr/eink
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base: avr:2bad84d2e6cfc9b4f332f351e16534c1472094e2
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avr:example
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compare: avr:2cb38b9fdcc4bec48d3b17b2b704a21ada23794a
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avr:example
avr:master

3 Commits
2bad84d2e6 ... 2cb38b9fdc

Author SHA1 Message Date
BlackMark
2cb38b9fdc Refactor interface to be fully static 2022-05-26 16:03:38 +02:00
BlackMark
612f6a9fbc Create readable names for display commands 2022-05-26 15:53:29 +02:00
BlackMark
1c01b17f4d Refactor pins to be user-provided 2022-05-26 15:16:09 +02:00
1 changed files with 87 additions and 75 deletions
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162
eink.hpp
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@ -7,143 +7,155 @@
#include "../clock.hpp" #include "../clock.hpp"
#include "../io/io.hpp" #include "../io/io.hpp"
template <typename Spi> namespace eink {
class Epd {
static constexpr auto width = uint16_t{200};
static constexpr auto height = uint16_t{200};
io::Pin<io::P::C1> m_rst; template <uint16_t Width, uint16_t Height, typename Spi, io::P RstPin, io::P DcPin, io::P BusyPin>
io::Pin<io::P::C0> m_dc; class Eink {
io::Pin<io::P::C2> m_bsy; struct Cmd {
static constexpr auto SW_RESET = uint8_t{0x12};
static constexpr auto DRIVER_OUTPUT_CONTROL = uint8_t{0x01};
static constexpr auto DATA_ENTRY_MODE = uint8_t{0x11};
static constexpr auto SET_RAM_X_ADDR_POSITIONS = uint8_t{0x44};
static constexpr auto SET_RAM_Y_ADDR_POSITIONS = uint8_t{0x45};
static constexpr auto BORDER_WAVEFORM_CONTROL = uint8_t{0x3C};
static constexpr auto READ_TEMPERATURE_SENSOR = uint8_t{0x18};
static constexpr auto SET_RAM_X_ADDR = uint8_t{0x4E};
static constexpr auto SET_RAM_Y_ADDR = uint8_t{0x4F};
static constexpr auto WRITE_RAM_BLACK = uint8_t{0x24};
static constexpr auto WRITE_RAM_RED = uint8_t{0x26};
static constexpr auto DISPLAY_UPDATE_CONTROL_2 = uint8_t{0x22};
static constexpr auto UPDATE_DISPLAY = uint8_t{0x20};
static constexpr auto DEEP_SLEEP_MODE = uint8_t{0x10};
};
static io::Pin<RstPin> m_rst;
static io::Pin<DcPin> m_dc;
static io::Pin<BusyPin> m_bsy;
public: public:
Epd() = default; static void init()
~Epd() = default;
int Init()
{ {
m_rst.dir(io::Dir::OUT); m_rst.dir(io::Dir::OUT);
m_dc.dir(io::Dir::OUT); m_dc.dir(io::Dir::OUT);
m_bsy.dir(io::Dir::IN); m_bsy.dir(io::Dir::IN);
Spi::init(); Spi::init();
/* EPD hardware init start */ reset();
Reset();
WaitUntilIdle(); waitUntilIdle();
SendCommand(0x12); // SWRESET sendCommand(Cmd::SW_RESET);
WaitUntilIdle(); waitUntilIdle();
SendCommand(0x01); // Driver output control sendCommand(Cmd::DRIVER_OUTPUT_CONTROL);
SendData(0xC7); sendData(0xC7);
SendData(0x00); sendData(0x00);
SendData(0x01); sendData(0x01);
SendCommand(0x11); // data entry mode sendCommand(Cmd::DATA_ENTRY_MODE);
SendData(0x01); sendData(0x01);
SendCommand(0x44); // set Ram-X address start/end position sendCommand(Cmd::SET_RAM_X_ADDR_POSITIONS);
SendData(0x00); sendData(0x00);
SendData(0x18); // 0x18-->(24+1)*8=200 sendData((Width / 8) - 1);
SendCommand(0x45); // set Ram-Y address start/end position sendCommand(Cmd::SET_RAM_Y_ADDR_POSITIONS);
SendData(0xC7); // 0xC7-->(199+1)=200 sendData(Height - 1);
SendData(0x00); sendData(0x00);
SendData(0x00); sendData(0x00);
SendData(0x00); sendData(0x00);
SendCommand(0x3C); // BorderWavefrom sendCommand(Cmd::BORDER_WAVEFORM_CONTROL);
SendData(0x05); sendData(0x05);
SendCommand(0x18); // Read built-in temperature sensor sendCommand(Cmd::READ_TEMPERATURE_SENSOR);
SendData(0x80); sendData(0x80);
SendCommand(0x4E); // set RAM x address count to 0; sendCommand(Cmd::SET_RAM_X_ADDR);
SendData(0x00); sendData(0x00);
SendCommand(0x4F); // set RAM y address count to 0X199;
SendData(0xC7);
SendData(0x00);
WaitUntilIdle();
/* EPD hardware init end */ sendCommand(Cmd::SET_RAM_Y_ADDR);
sendData(Height - 1);
sendData(0x00);
return 0; waitUntilIdle();
} }
void SendCommand(unsigned char command) static void sendCommand(const uint8_t command)
{ {
m_dc = false; m_dc = false;
SpiTransfer(command); spiTransfer(command);
} }
void SendData(unsigned char data) static void sendData(const uint8_t data)
{ {
m_dc = true; m_dc = true;
SpiTransfer(data); spiTransfer(data);
} }
void WaitUntilIdle() static void waitUntilIdle()
{ {
while (m_bsy) { while (m_bsy) {
_delay_ms(100); _delay_ms(100);
} }
} }
void Reset() static void reset()
{ {
m_rst = true; m_rst = true;
_delay_ms(200); _delay_ms(200);
m_rst = false; // module reset m_rst = false;
_delay_ms(10); _delay_ms(10);
m_rst = true; m_rst = true;
_delay_ms(200); _delay_ms(200);
} }
void DisplayFrame(const unsigned char *frame_buffer_black, const unsigned char *frame_buffer_red) static void draw(const uint8_t *blackFrame, const uint8_t *redFrame)
{ {
SendCommand(0x24); sendCommand(Cmd::WRITE_RAM_BLACK);
for (auto i = uint16_t{0}; i < width * height / 8; i++) { for (auto i = uint16_t{0}; i < Width * Height / 8; i++) {
SendData(pgm_read_byte(&frame_buffer_black[i])); sendData(pgm_read_byte(&blackFrame[i]));
} }
SendCommand(0x26); sendCommand(Cmd::WRITE_RAM_RED);
for (auto i = uint16_t{0}; i < width * height / 8; i++) { for (auto i = uint16_t{0}; i < Width * Height / 8; i++) {
SendData(~pgm_read_byte(&frame_buffer_red[i])); sendData(~pgm_read_byte(&redFrame[i]));
} }
SendCommand(0x22); sendCommand(Cmd::DISPLAY_UPDATE_CONTROL_2);
SendData(0xF7); sendData(0xF7);
SendCommand(0x20); sendCommand(Cmd::UPDATE_DISPLAY);
WaitUntilIdle(); waitUntilIdle();
} }
void DisplayClear() static void clear()
{ {
SendCommand(0x24); sendCommand(Cmd::WRITE_RAM_BLACK);
for (auto i = uint16_t{0}; i < width * height / 8; i++) { for (auto i = uint16_t{0}; i < Width * Height / 8; i++) {
SendData(0xff); sendData(0xff);
} }
SendCommand(0x26); sendCommand(Cmd::WRITE_RAM_RED);
for (auto i = uint16_t{0}; i < width * height / 8; i++) { for (auto i = uint16_t{0}; i < Width * Height / 8; i++) {
SendData(0x00); sendData(0x00);
} }
SendCommand(0x22); sendCommand(Cmd::DISPLAY_UPDATE_CONTROL_2);
SendData(0xF7); sendData(0xF7);
SendCommand(0x20); sendCommand(Cmd::UPDATE_DISPLAY);
WaitUntilIdle(); waitUntilIdle();
} }
void Sleep() static void sleep()
{ {
SendCommand(0x10); // power setting sendCommand(Cmd::DEEP_SLEEP_MODE);
SendData(0x01); // gate switch to external sendData(0x01);
_delay_ms(100); _delay_ms(100);
} }
void SpiTransfer(unsigned char data) static void spiTransfer(const uint8_t data)
{ {
Spi::select(true); Spi::select(true);
Spi::transfer(data); Spi::transfer(data);
Spi::select(false); Spi::select(false);
} }
}; };
} // namespace eink