mirror of
https://github.com/sle118/squeezelite-esp32.git
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254 lines
8.4 KiB
C
254 lines
8.4 KiB
C
/**
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* Copyright (c) 2017-2018 Tara Keeling
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* 2020 Philippe G.
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*
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* This software is released under the MIT License.
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* https://opensource.org/licenses/MIT
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "driver/gpio.h"
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#include <esp_log.h>
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#include "gds.h"
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#include "gds_private.h"
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static char TAG[] = "SSD1675";
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const unsigned char EPD_lut_full_update[] = {
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0x80,0x60,0x40,0x00,0x00,0x00,0x00, //LUT0: BB: VS 0 ~7
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0x10,0x60,0x20,0x00,0x00,0x00,0x00, //LUT1: BW: VS 0 ~7
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0x80,0x60,0x40,0x00,0x00,0x00,0x00, //LUT2: WB: VS 0 ~7
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0x10,0x60,0x20,0x00,0x00,0x00,0x00, //LUT3: WW: VS 0 ~7
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0x00,0x00,0x00,0x00,0x00,0x00,0x00, //LUT4: VCOM: VS 0 ~7
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0x03,0x03,0x00,0x00,0x02, // TP0 A~D RP0
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0x09,0x09,0x00,0x00,0x02, // TP1 A~D RP1
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0x03,0x03,0x00,0x00,0x02, // TP2 A~D RP2
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0x00,0x00,0x00,0x00,0x00, // TP3 A~D RP3
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0x00,0x00,0x00,0x00,0x00, // TP4 A~D RP4
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0x00,0x00,0x00,0x00,0x00, // TP5 A~D RP5
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0x00,0x00,0x00,0x00,0x00, // TP6 A~D RP6
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0x15,0x41,0xA8,0x32,0x30,0x0A,
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};
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const unsigned char EPD_lut_partial_update[]= { //20 bytes
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0x00,0x00,0x00,0x00,0x00,0x00,0x00, //LUT0: BB: VS 0 ~7
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0x80,0x00,0x00,0x00,0x00,0x00,0x00, //LUT1: BW: VS 0 ~7
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0x40,0x00,0x00,0x00,0x00,0x00,0x00, //LUT2: WB: VS 0 ~7
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0x00,0x00,0x00,0x00,0x00,0x00,0x00, //LUT3: WW: VS 0 ~7
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0x00,0x00,0x00,0x00,0x00,0x00,0x00, //LUT4: VCOM: VS 0 ~7
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0x0A,0x00,0x00,0x00,0x00, // TP0 A~D RP0
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0x00,0x00,0x00,0x00,0x00, // TP1 A~D RP1
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0x00,0x00,0x00,0x00,0x00, // TP2 A~D RP2
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0x00,0x00,0x00,0x00,0x00, // TP3 A~D RP3
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0x00,0x00,0x00,0x00,0x00, // TP4 A~D RP4
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0x00,0x00,0x00,0x00,0x00, // TP5 A~D RP5
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0x00,0x00,0x00,0x00,0x00, // TP6 A~D RP6
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0x15,0x41,0xA8,0x32,0x30,0x0A,
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};
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struct PrivateSpace {
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int ReadyPin;
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uint16_t Height;
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};
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// Functions are not declared to minimize # of lines
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void WaitReady( struct GDS_Device* Device) {
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struct PrivateSpace *Private = (struct PrivateSpace*) Device->Private;
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if (Private->ReadyPin >= 0) {
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int count = 4*1000;
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while (gpio_get_level( Private->ReadyPin ) && count) {
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vTaskDelay( pdMS_TO_TICKS(100) );
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count -= 100;
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}
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} else {
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vTaskDelay( pdMS_TO_TICKS(2000) );
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}
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}
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static void WriteByte( struct GDS_Device* Device, uint8_t Data ) {
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Device->WriteData( Device, &Data, 1 );
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}
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static void SetColumnAddress( struct GDS_Device* Device, uint8_t Start, uint8_t End ) {
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// start might be greater than end if we decrement
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Device->WriteCommand( Device, 0x44 );
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Device->WriteData( Device, &Start, 1 );
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Device->WriteData( Device, &End, 1 );
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// we obviously want to start ... from the start
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Device->WriteCommand( Device, 0x4e );
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WriteByte( Device, Start );
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}
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static void SetRowAddress( struct GDS_Device* Device, uint16_t Start, uint16_t End ) {
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// start might be greater than end if we decrement
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Device->WriteCommand( Device, 0x45 );
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WriteByte( Device, Start );
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WriteByte( Device, Start >> 8 );
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WriteByte( Device, End );
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WriteByte( Device, End >> 8 );
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// we obviously want to start ... from the start
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Device->WriteCommand( Device, 0x4f );
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WriteByte( Device, Start );
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WriteByte( Device, Start >> 8 );
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}
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static void Update( struct GDS_Device* Device ) {
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uint8_t *iptr = Device->Framebuffer;
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Device->WriteCommand( Device, 0x24 );
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// this is awfully slow, but e-ink are slow anyway ...
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for (int i = Device->FramebufferSize; --i >= 0;) {
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WriteByte( Device, ~*iptr++ );
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}
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Device->WriteCommand( Device, 0x22 );
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WriteByte( Device, 0xC7);
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Device->WriteCommand( Device, 0X20 );
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WaitReady( Device );
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}
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// remember that for these ELD drivers W and H are "inverted"
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static inline void _DrawPixel( struct GDS_Device* Device, int X, int Y, int Color ) {
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uint32_t YBit = ( Y & 0x07 );
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Y>>= 3;
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uint8_t* FBOffset = Device->Framebuffer + ( ( Y * Device->Width ) + X );
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*FBOffset = ( Color == GDS_COLOR_BLACK ) ? *FBOffset & ~BIT( 7-YBit ) : *FBOffset | BIT( 7-YBit );
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}
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static void ClearWindow( struct GDS_Device* Device, int x1, int y1, int x2, int y2, int Color ) {
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for (int r = y1; r <= y2; r++) {
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for (int c = x1; c <= x2; c++) {
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_DrawPixel( Device, c, r, Color );
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}
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}
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}
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static void DrawBitmapCBR(struct GDS_Device* Device, uint8_t *Data, int Width, int Height, int Color ) {
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if (!Height) Height = Device->Height;
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if (!Width) Width = Device->Width;
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// just do row/column swap
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for (int r = 0; r < Height; r++) {
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uint8_t *optr = Device->Framebuffer + r*Device->Width, *iptr = Data + r;
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for (int c = Width; --c >= 0;) {
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*optr++ = *iptr;
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iptr += Height;
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}
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}
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}
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static bool Init( struct GDS_Device* Device ) {
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struct PrivateSpace *Private = (struct PrivateSpace*) Device->Private;
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// need to re-adjust framebuffer because these are non % 8
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Private->Height = Device->Height;
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if (Device->Height & 0x07) Device->Height = ((Device->Height >> 3) + 1) << 3;
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Device->FramebufferSize = Device->Width * Device->Height / 8;
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Device->Framebuffer = calloc(1, Device->FramebufferSize);
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NullCheck( Device->Framebuffer, return false );
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if (Private->ReadyPin >= 0) {
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gpio_pad_select_gpio( Private->ReadyPin );
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gpio_set_pull_mode( Private->ReadyPin, GPIO_PULLUP_ONLY);
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gpio_set_direction( Private->ReadyPin, GPIO_MODE_INPUT );
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}
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// soft reset
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vTaskDelay(pdMS_TO_TICKS( 2000 ));
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Device->WriteCommand( Device, 0x12 );
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WaitReady( Device );
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Device->WriteCommand( Device, 0x74 );
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WriteByte( Device, 0x54 );
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Device->WriteCommand( Device, 0x7e );
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WriteByte( Device, 0x3B );
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Device->WriteCommand( Device, 0x3c );
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WriteByte( Device, 0x03 );
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Device->WriteCommand( Device, 0x2c );
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WriteByte( Device, 0x55 );
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Device->WriteCommand( Device, 0x03 );
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WriteByte( Device, EPD_lut_full_update[70] );
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Device->WriteCommand( Device, 0x04 );
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WriteByte( Device, EPD_lut_full_update[71] );
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WriteByte( Device, EPD_lut_full_update[72] );
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WriteByte( Device, EPD_lut_full_update[73] );
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Device->WriteCommand( Device, 0x3a );
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WriteByte( Device, EPD_lut_full_update[74] );
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Device->WriteCommand( Device, 0x3b );
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WriteByte( Device, EPD_lut_full_update[75] );
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Device->WriteCommand( Device, 0X32 );
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for (int i = 0; i < 70; i++) {
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WriteByte( Device, EPD_lut_full_update[i] );
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}
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// now deal with funny X/Y layout (W and H are "inverted")
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Device->WriteCommand( Device, 0x01 );
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WriteByte( Device, Device->Width - 1 );
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WriteByte( Device, (Device->Width - 1) >> 8 );
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WriteByte( Device, (0 << 0) );
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/*
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Start from 0, Ymax, incX, decY. Starting from X=Height would be difficult
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as we would hit the extra bits added because height % 8 != 0 and they are
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not written by the DrawPixel. By starting from X=0 we are aligned and
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doing incY is like a clockwise 90° rotation (vs otherwise we would virtually
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do a counter-clockwise rotation but again have the "border" issue.
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*/
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Device->WriteCommand( Device, 0x11 );
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WriteByte( Device, (1 << 2) | (0 << 1) | (1 << 0));
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// must be in order with increment/decrement i.e start might be > end if we decrement
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SetColumnAddress( Device, 0x0, (Device->Height >> 3) - 1 );
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SetRowAddress ( Device, Device->Width - 1, 0 );
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WaitReady( Device );
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Update( Device );
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return true;
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}
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static const struct GDS_Device SSD1675 = {
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.DrawBitmapCBR = DrawBitmapCBR,
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.ClearWindow = ClearWindow,
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.DrawPixelFast = _DrawPixel,
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.Update = Update,
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.Init = Init,
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.Mode = GDS_MONO,
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.Depth = 1,
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.Alloc = GDS_ALLOC_NONE,
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};
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struct GDS_Device* SSD1675_Detect(sys_display_config* Driver, struct GDS_Device* Device) {
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if (Driver->common.driver != sys_display_drivers_SSD1675) return NULL;
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if (!Device) Device = calloc(1, sizeof(struct GDS_Device));
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*Device = SSD1675;
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struct PrivateSpace* Private = (struct PrivateSpace*)Device->Private;
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Private->ReadyPin = -1;
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if (Driver->common.ready >= 0) {
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Private->ReadyPin = Driver->common.ready;
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}
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ESP_LOGI(TAG, "SSD1675 driver with ready GPIO %d", Private->ReadyPin);
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return Device;
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} |