mirror of
https://github.com/sle118/squeezelite-esp32.git
synced 2025-12-06 19:47:02 +03:00
297 lines
10 KiB
C
297 lines
10 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 <esp_heap_caps.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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#define SHADOW_BUFFER
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#define USE_IRAM
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#define PAGE_BLOCK 2048
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#define ENABLE_WRITE 0x2c
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#define min(a,b) (((a) < (b)) ? (a) : (b))
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static char TAG[] = "ST77xx";
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enum { ST7735, ST7789 };
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struct PrivateSpace {
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uint8_t *iRAM, *Shadowbuffer;
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struct {
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uint16_t Height, Width;
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} Offset;
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uint8_t MADCtl, PageSize;
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uint8_t Model;
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};
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// Functions are not declared to minimize # of lines
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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, uint16_t Start, uint16_t End ) {
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uint32_t Addr = __builtin_bswap16(Start) | (__builtin_bswap16(End) << 16);
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Device->WriteCommand( Device, 0x2A );
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Device->WriteData( Device, (uint8_t*) &Addr, 4 );
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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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uint32_t Addr = __builtin_bswap16(Start) | (__builtin_bswap16(End) << 16);
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Device->WriteCommand( Device, 0x2B );
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Device->WriteData( Device, (uint8_t*) &Addr, 4 );
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}
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static void Update16( struct GDS_Device* Device ) {
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struct PrivateSpace *Private = (struct PrivateSpace*) Device->Private;
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#ifdef SHADOW_BUFFER
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uint32_t *optr = (uint32_t*) Private->Shadowbuffer, *iptr = (uint32_t*) Device->Framebuffer;
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int FirstCol = Device->Width / 2, LastCol = 0, FirstRow = -1, LastRow = 0;
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for (int r = 0; r < Device->Height; r++) {
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// look for change and update shadow (cheap optimization = width is always a multiple of 2)
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for (int c = 0; c < Device->Width / 2; c++, iptr++, optr++) {
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if (*optr != *iptr) {
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*optr = *iptr;
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if (c < FirstCol) FirstCol = c;
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if (c > LastCol) LastCol = c;
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if (FirstRow < 0) FirstRow = r;
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LastRow = r;
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}
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}
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// wait for a large enough window - careful that window size might increase by more than a line at once !
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if (FirstRow < 0 || ((LastCol - FirstCol + 1) * (r - FirstRow + 1) * 4 < PAGE_BLOCK && r != Device->Height - 1)) continue;
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FirstCol *= 2;
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LastCol = LastCol * 2 + 1;
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SetRowAddress( Device, FirstRow + Private->Offset.Height, LastRow + Private->Offset.Height);
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SetColumnAddress( Device, FirstCol + Private->Offset.Width, LastCol + Private->Offset.Width );
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Device->WriteCommand( Device, ENABLE_WRITE );
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int ChunkSize = (LastCol - FirstCol + 1) * 2;
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// own use of IRAM has not proven to be much better than letting SPI do its copy
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if (Private->iRAM) {
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uint8_t *optr = Private->iRAM;
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for (int i = FirstRow; i <= LastRow; i++) {
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memcpy(optr, Private->Shadowbuffer + (i * Device->Width + FirstCol) * 2, ChunkSize);
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optr += ChunkSize;
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if (optr - Private->iRAM < PAGE_BLOCK && i < LastRow) continue;
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Device->WriteData(Device, Private->iRAM, optr - Private->iRAM);
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optr = Private->iRAM;
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}
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} else for (int i = FirstRow; i <= LastRow; i++) {
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Device->WriteData( Device, Private->Shadowbuffer + (i * Device->Width + FirstCol) * 2, ChunkSize );
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}
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FirstCol = Device->Width / 2; LastCol = 0;
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FirstRow = -1;
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}
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#else
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// always update by full lines
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SetColumnAddress( Device, Private->Offset.Width, Device->Width - 1);
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for (int r = 0; r < Device->Height; r += min(Private->PageSize, Device->Height - r)) {
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int Height = min(Private->PageSize, Device->Height - r);
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SetRowAddress( Device, Private->Offset.Height + r, Private->Offset.Height + r + Height - 1 );
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Device->WriteCommand(Device, ENABLE_WRITE);
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if (Private->iRAM) {
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memcpy(Private->iRAM, Device->Framebuffer + r * Device->Width * 2, Height * Device->Width * 2 );
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Device->WriteData( Device, Private->iRAM, Height * Device->Width * 2 );
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} else {
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Device->WriteData( Device, Device->Framebuffer + r * Device->Width * 2, Height * Device->Width * 2 );
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}
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}
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#endif
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}
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static void Update24( struct GDS_Device* Device ) {
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struct PrivateSpace *Private = (struct PrivateSpace*) Device->Private;
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#ifdef SHADOW_BUFFER
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uint16_t *optr = (uint16_t*) Private->Shadowbuffer, *iptr = (uint16_t*) Device->Framebuffer;
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int FirstCol = (Device->Width * 3) / 2, LastCol = 0, FirstRow = -1, LastRow = 0;
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for (int r = 0; r < Device->Height; r++) {
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// look for change and update shadow (cheap optimization = width always / by 2)
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for (int c = 0; c < (Device->Width * 3) / 2; c++, optr++, iptr++) {
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if (*optr != *iptr) {
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*optr = *iptr;
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if (c < FirstCol) FirstCol = c;
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if (c > LastCol) LastCol = c;
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if (FirstRow < 0) FirstRow = r;
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LastRow = r;
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}
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}
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// do we have enough to send (cols are divided by 3/2)
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if (FirstRow < 0 || ((((LastCol - FirstCol + 1) * 2 + 3 - 1) / 3) * (r - FirstRow + 1) * 3 < PAGE_BLOCK && r != Device->Height - 1)) continue;
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FirstCol = (FirstCol * 2) / 3;
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LastCol = (LastCol * 2 + 1) / 3;
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SetRowAddress( Device, FirstRow + Private->Offset.Height, LastRow + Private->Offset.Height);
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SetColumnAddress( Device, FirstCol + Private->Offset.Width, LastCol + Private->Offset.Width );
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Device->WriteCommand( Device, ENABLE_WRITE );
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int ChunkSize = (LastCol - FirstCol + 1) * 3;
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// own use of IRAM has not proven to be much better than letting SPI do its copy
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if (Private->iRAM) {
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uint8_t *optr = Private->iRAM;
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for (int i = FirstRow; i <= LastRow; i++) {
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memcpy(optr, Private->Shadowbuffer + (i * Device->Width + FirstCol) * 3, ChunkSize);
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optr += ChunkSize;
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if (optr - Private->iRAM < PAGE_BLOCK && i < LastRow) continue;
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Device->WriteData(Device, Private->iRAM, optr - Private->iRAM);
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optr = Private->iRAM;
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}
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} else for (int i = FirstRow; i <= LastRow; i++) {
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Device->WriteData( Device, Private->Shadowbuffer + (i * Device->Width + FirstCol) * 3, ChunkSize );
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}
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FirstCol = (Device->Width * 3) / 2; LastCol = 0;
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FirstRow = -1;
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}
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#else
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// always update by full lines
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SetColumnAddress( Device, Private->Offset.Width, Device->Width - 1);
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for (int r = 0; r < Device->Height; r += min(Private->PageSize, Device->Height - r)) {
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int Height = min(Private->PageSize, Device->Height - r);
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SetRowAddress( Device, Private->Offset.Height + r, Private->Offset.Height + r + Height - 1 );
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Device->WriteCommand(Device, ENABLE_WRITE);
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if (Private->iRAM) {
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memcpy(Private->iRAM, Device->Framebuffer + r * Device->Width * 3, Height * Device->Width * 3 );
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Device->WriteData( Device, Private->iRAM, Height * Device->Width * 3 );
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} else {
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Device->WriteData( Device, Device->Framebuffer + r * Device->Width * 3, Height * Device->Width * 3 );
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}
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}
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#endif
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}
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static void SetLayout( struct GDS_Device* Device, bool HFlip, bool VFlip, bool Rotate ) {
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struct PrivateSpace *Private = (struct PrivateSpace*) Device->Private;
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Private->MADCtl = HFlip ? (Private->MADCtl | (1 << 7)) : (Private->MADCtl & ~(1 << 7));
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Private->MADCtl = VFlip ? (Private->MADCtl | (1 << 6)) : (Private->MADCtl & ~(1 << 6));
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Private->MADCtl = Rotate ? (Private->MADCtl | (1 << 5)) : (Private->MADCtl & ~(1 << 5));
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Device->WriteCommand( Device, 0x36 );
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WriteByte( Device, Private->MADCtl );
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if (Private->Model == ST7789) {
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if (Rotate) Private->Offset.Width = HFlip ? 320 - Device->Width : 0;
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else Private->Offset.Height = HFlip ? 320 - Device->Height : 0;
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}
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#ifdef SHADOW_BUFFER
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// force a full refresh (almost ...)
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memset(Private->Shadowbuffer, 0xAA, Device->FramebufferSize);
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#endif
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}
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static void DisplayOn( struct GDS_Device* Device ) { Device->WriteCommand( Device, 0x29 ); }
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static void DisplayOff( struct GDS_Device* Device ) { Device->WriteCommand( Device, 0x28 ); }
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static void SetContrast( struct GDS_Device* Device, uint8_t Contrast ) {
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Device->WriteCommand( Device, 0x51 );
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WriteByte( Device, Contrast );
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Device->SetContrast = NULL;
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GDS_SetContrast( Device, Contrast );
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Device->SetContrast = SetContrast;
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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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int Depth = (Device->Depth + 8 - 1) / 8;
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Private->PageSize = min(8, PAGE_BLOCK / (Device->Width * Depth));
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#ifdef SHADOW_BUFFER
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Private->Shadowbuffer = malloc( Device->FramebufferSize );
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memset(Private->Shadowbuffer, 0xFF, Device->FramebufferSize);
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#endif
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#ifdef USE_IRAM
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Private->iRAM = heap_caps_malloc( (Private->PageSize + 1) * Device->Width * Depth, MALLOC_CAP_INTERNAL | MALLOC_CAP_DMA );
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#endif
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ESP_LOGI(TAG, "ST77xx with bit depth %u, page %u, iRAM %p", Device->Depth, Private->PageSize, Private->iRAM);
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// Sleepout + Booster
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Device->WriteCommand( Device, 0x11 );
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// need BGR & Address Mode
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Private->MADCtl = 1 << 3;
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Device->WriteCommand( Device, 0x36 );
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WriteByte( Device, Private->MADCtl );
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// set flip modes & contrast
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GDS_SetContrast( Device, 0x7f );
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Device->SetLayout( Device, false, false, false );
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// set screen depth (16/18)
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Device->WriteCommand( Device, 0x3A );
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if (Private->Model == ST7789) WriteByte( Device, Device->Depth == 24 ? 0x066 : 0x55 );
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else WriteByte( Device, Device->Depth == 24 ? 0x06 : 0x05 );
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// no Display Inversion
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Device->WriteCommand( Device, Private->Model == ST7735 ? 0x20 : 0x21 );
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// gone with the wind
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Device->DisplayOn( Device );
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Device->Update( Device );
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return true;
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}
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static const struct GDS_Device ST77xx = {
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.DisplayOn = DisplayOn, .DisplayOff = DisplayOff,
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.SetLayout = SetLayout,
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.Update = Update16, .Init = Init,
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.Mode = GDS_RGB565, .Depth = 16,
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};
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struct GDS_Device* ST77xx_Detect(char *Driver, struct GDS_Device* Device) {
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uint8_t Model;
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int Depth;
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if (strcasestr(Driver, "ST7735")) Model = ST7735;
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else if (strcasestr(Driver, "ST7789")) Model = ST7789;
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else return NULL;
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if (!Device) Device = calloc(1, sizeof(struct GDS_Device));
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*Device = ST77xx;
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((struct PrivateSpace*) Device->Private)->Model = Model;
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sscanf(Driver, "%*[^:]:%u", &Depth);
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if (Depth == 18) {
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Device->Mode = GDS_RGB666;
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Device->Depth = 24;
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Device->Update = Update24;
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}
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if (Model == ST7789) Device->SetContrast = SetContrast;
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return Device;
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} |