avr/eink
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base: avr:9a4193ee75ca2e25ff8dc1de5fa1e14802725e04
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avr:master avr:example
...
compare: avr:2e417a0f3aa9e187d80f008054b9323fc05afced
Branches Tags
avr:example avr:master

2 Commits
9a4193ee75 ... 2e417a0f3a

Author SHA1 Message Date
BlackMark
2e417a0f3a Add three wire spi support 2022-05-28 17:02:00 +02:00
BlackMark
d1419b2d23 Use enum to represent commands 2022-05-28 16:14:12 +02:00
1 changed files with 28 additions and 19 deletions
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47
eink.hpp
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@@ -12,26 +12,31 @@ namespace eink {
template <uint16_t Width, uint16_t Height, typename Spi, io::P RstPin, io::P DcPin, io::P BusyPin> template <uint16_t Width, uint16_t Height, typename Spi, io::P RstPin, io::P DcPin, io::P BusyPin>
class Eink { class Eink {
struct Cmd { using word_t = typename Spi::word_t;
static constexpr auto SW_RESET = uint8_t{0x12};
static constexpr auto DRIVER_OUTPUT_CONTROL = uint8_t{0x01}; enum class Cmd : uint8_t {
static constexpr auto DATA_ENTRY_MODE = uint8_t{0x11}; DRIVER_OUTPUT_CONTROL = 0x01,
static constexpr auto SET_RAM_X_ADDR_POSITIONS = uint8_t{0x44}; DEEP_SLEEP_MODE = 0x10,
static constexpr auto SET_RAM_Y_ADDR_POSITIONS = uint8_t{0x45}; DATA_ENTRY_MODE = 0x11,
static constexpr auto BORDER_WAVEFORM_CONTROL = uint8_t{0x3C}; SW_RESET = 0x12,
static constexpr auto READ_TEMPERATURE_SENSOR = uint8_t{0x18}; READ_TEMPERATURE_SENSOR = 0x18,
static constexpr auto SET_RAM_X_ADDR = uint8_t{0x4E}; UPDATE_DISPLAY = 0x20,
static constexpr auto SET_RAM_Y_ADDR = uint8_t{0x4F}; DISPLAY_UPDATE_CONTROL_2 = 0x22,
static constexpr auto WRITE_RAM_BLACK = uint8_t{0x24}; WRITE_RAM_BLACK = 0x24,
static constexpr auto WRITE_RAM_RED = uint8_t{0x26}; WRITE_RAM_RED = 0x26,
static constexpr auto DISPLAY_UPDATE_CONTROL_2 = uint8_t{0x22}; BORDER_WAVEFORM_CONTROL = 0x3C,
static constexpr auto UPDATE_DISPLAY = uint8_t{0x20}; SET_RAM_X_ADDR_POSITIONS = 0x44,
static constexpr auto DEEP_SLEEP_MODE = uint8_t{0x10}; SET_RAM_Y_ADDR_POSITIONS = 0x45,
SET_RAM_X_ADDR = 0x4E,
SET_RAM_Y_ADDR = 0x4F,
}; };
static io::Pin<RstPin> m_rst; static io::Pin<RstPin> m_rst;
static io::Pin<DcPin> m_dc; static io::Pin<DcPin> m_dc;
static io::Pin<BusyPin> m_bsy; static io::Pin<BusyPin> m_bsy;
static constexpr auto THREE_WIRE_SPI = (DcPin == io::P::NONE ? true : false);
static_assert((THREE_WIRE_SPI && sizeof(word_t) > 1) || !THREE_WIRE_SPI,
"Three wire SPI requires SPI word size of at least 9 bits");
static constexpr auto BLOCK_SIZE = 5; static constexpr auto BLOCK_SIZE = 5;
@@ -106,14 +111,18 @@ class Eink {
waitUntilIdle(); waitUntilIdle();
} }
static void sendCommand(const uint8_t command) static void sendCommand(const Cmd command)
{ {
m_dc = false; m_dc = false;
spiTransfer(command); spiTransfer(static_cast<word_t>(command));
} }
static void sendData(const uint8_t data) static void sendData(word_t data)
{ {
if constexpr (THREE_WIRE_SPI) {
data |= 1 << 8;
}
m_dc = true; m_dc = true;
spiTransfer(data); spiTransfer(data);
} }
@@ -201,7 +210,7 @@ class Eink {
_delay_ms(100); _delay_ms(100);
} }
static void spiTransfer(const uint8_t data) static void spiTransfer(const word_t data)
{ {
Spi::select(true); Spi::select(true);
Spi::transfer(data); Spi::transfer(data);