kopia lustrzana https://github.com/meshtastic/firmware
E-Ink driver for DEPG0213BNS800
Todd Herbert
Tom Fifield
rodzic
ac8dac367e
commit
c46867daa5
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#include "./DEPG0213BNS800.h"
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#ifdef MESHTASTIC_INCLUDE_NICHE_GRAPHICS
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using namespace NicheGraphics::Drivers;
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// Describes the operation performed when a "fast refresh" is performed
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// Source: Modified from GxEPD2 (GxEPD2_213_BN)
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static const uint8_t LUT_FAST[] = {
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// 1 2 3
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0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // B2B (Existing black pixels)
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0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // B2W (New white pixels)
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0x40, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // W2B (New black pixels)
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0x00, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // W2W (Existing white pixels)
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // VCOM
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0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, // 1. Any pixels changing W2B or B2W. Two medium taps.
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0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 2. All pixels. One short tap.
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0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 3. Cooldown
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
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0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, //
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};
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// How strongly the pixels are pulled and pushed
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void DEPG0213BNS800::configVoltages()
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{
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switch (updateType) {
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case FAST:
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// Reference: display datasheet, GxEPD1
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sendCommand(0x03); // Gate voltage
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sendData(0x17); // VGH: 20V
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// Reference: display datasheet, GxEPD1
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sendCommand(0x04); // Source voltage
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sendData(0x41); // VSH1: 15V
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sendData(0x00); // VSH2: NA
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sendData(0x32); // VSL: -15V
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// GxEPD1 sets this at -1.2V, but that seems to be drive the pixels very hard
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sendCommand(0x2C); // VCOM voltage
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sendData(0x08); // VCOM: -0.2V
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break;
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case FULL:
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default:
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// From OTP memory
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break;
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}
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}
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// Load settings about how the pixels are moved from old state to new state during a refresh
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// - manually specified,
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// - or with stored values from displays OTP memory
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void DEPG0213BNS800::configWaveform()
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{
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switch (updateType) {
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case FAST:
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sendCommand(0x3C); // Border waveform:
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sendData(0x80); // VSS
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sendCommand(0x32); // Write LUT register from MCU:
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sendData(LUT_FAST, sizeof(LUT_FAST)); // (describes operation for a FAST refresh)
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break;
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case FULL:
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default:
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// From OTP memory
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break;
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}
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}
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// Describes the sequence of events performed by the displays controller IC during a refresh
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// Includes "power up", "load settings from memory", "update the pixels", etc
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void DEPG0213BNS800::configUpdateSequence()
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{
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switch (updateType) {
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case FAST:
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sendCommand(0x22); // Set "update sequence"
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sendData(0xCF); // Differential, use manually loaded waveform
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break;
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case FULL:
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default:
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sendCommand(0x22); // Set "update sequence"
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sendData(0xF7); // Non-differential, load waveform from OTP
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break;
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}
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}
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// Once the refresh operation has been started,
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// begin periodically polling the display to check for completion, using the normal Meshtastic threading code
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// Only used when refresh is "async"
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void DEPG0213BNS800::detachFromUpdate()
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{
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switch (updateType) {
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case FAST:
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return beginPolling(50, 500); // At least 500ms, then poll every 50ms
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case FULL:
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default:
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return beginPolling(100, 3500); // At least 3500ms, then poll every 100ms
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}
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}
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// For this display, we do not need to re-write the new image.
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// We're overriding SSD16XX::finalizeUpdate to make this small optimization.
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// The display does also work just fine with the generic SSD16XX method, though.
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void DEPG0213BNS800::finalizeUpdate()
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{
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// Put a copy of the image into the "old memory".
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// Used with differential refreshes (e.g. FAST update), to determine which px need to move, and which can remain in place
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// We need to keep the "old memory" up to date, because don't know whether next refresh will be FULL or FAST etc.
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if (updateType != FULL) {
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// writeNewImage(); // Not required for this display
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writeOldImage();
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sendCommand(0x7F); // Terminate image write without update
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wait();
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}
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// Enter deep-sleep to save a few µA
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// Waking from this requires that display's reset pin is broken out
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if (pin_rst != 0xFF)
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deepSleep();
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}
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#endif // MESHTASTIC_INCLUDE_NICHE_GRAPHICS
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@ -0,0 +1,44 @@
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/*
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E-Ink display driver
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- DEPG0213BNS800
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- Manufacturer: DKE
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- Size: 2.13 inch
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- Resolution: 122px x 250px
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- Flex connector marking: FPC-7528B
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Note: this is from an older generation of DKE panels, which still used Solomon Systech controller ICs.
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DKE's website suggests that the latest DEPG0213BN displays may use Fitipower controllers instead.
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*/
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#pragma once
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#ifdef MESHTASTIC_INCLUDE_NICHE_GRAPHICS
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#include "configuration.h"
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#include "./SSD16XX.h"
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namespace NicheGraphics::Drivers
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{
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class DEPG0213BNS800 : public SSD16XX
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{
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// Display properties
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private:
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static constexpr uint32_t width = 122;
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static constexpr uint32_t height = 250;
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static constexpr UpdateTypes supported = (UpdateTypes)(FULL | FAST);
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public:
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DEPG0213BNS800() : SSD16XX(width, height, supported, 1) {} // Note: left edge of this display is offset by 1 byte
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protected:
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void configVoltages() override;
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void configWaveform() override;
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void configUpdateSequence() override;
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void detachFromUpdate() override;
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void finalizeUpdate() override; // Only overriden for a slight optimization
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};
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} // namespace NicheGraphics::Drivers
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#endif // MESHTASTIC_INCLUDE_NICHE_GRAPHICS
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