ugfx/drivers/gdisp/UC8173/gdisp_lld_UC8173.c

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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
#include "gfx.h"
#if GFX_USE_GDISP
#define GDISP_DRIVER_VMT GDISPVMT_UC8173
#include "gdisp_lld_config.h"
#include "../../../src/gdisp/gdisp_driver.h"
#include "UC8173.h"
#include "board_UC8173.h"
#if defined(GDISP_SCREEN_HEIGHT) || defined(GDISP_SCREEN_HEIGHT)
#if GFX_COMPILER_WARNING_TYPE == GFX_COMPILER_WARNING_DIRECT
#warning "GDISP: This low level driver does not support setting a screen size. It is being ignored."
#elif GFX_COMPILER_WARNING_TYPE == GFX_COMPILER_WARNING_MACRO
COMPILER_WARNING("GDISP: This low level driver does not support setting a screen size. It is being ignored.")
#endif
#undef GDISP_SCREEN_WIDTH
#undef GDISP_SCREEN_HEIGHT
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#endif
#define GDISP_SCREEN_HEIGHT 240
#define GDISP_SCREEN_WIDTH 240
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#define PRIV(g) ((UC8173_Private*)((g)->priv))
#define FRAMEBUFFER(g) ((uint8_t *)(PRIV(g)+1))
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#define GDISP_FLG_NEEDFLUSH (GDISP_FLG_DRIVER << 0)
#if GDISP_LLD_PIXELFORMAT == GDISP_PIXELFORMAT_MONO
#define LINE_BYTES (GDISP_SCREEN_WIDTH/8)
#define WRITEBUFCMD DTM4
#define xyaddr(x, y) (((x)>>3) + ((y) * LINE_BYTES))
//#define xybit(x, c) ((c) << ((x) & 7)) // This one has the wrong order of the pixels inside the byte
#define xybit(x, c) ((c) << (7-((x) & 7)))
#elif GDISP_LLD_PIXELFORMAT == GDISP_PIXELFORMAT_GRAY4
#define LINE_BYTES (GDISP_SCREEN_WIDTH/4)
#define WRITEBUFCMD DTM2 // NOT SURE THIS IS RIGHT - MAY NEED TO USE DTM0 and then send a refresh???
#define xyaddr(x, y) (((x)>>2) + ((y) * LINE_BYTES))
//#define xybit(x, c) ((c) << (((x) & 3)<<1)) // This one has the wrong order of the pixels inside the byte
#define xybit(x, c) ((c) << (6-((x) & 3)<<1))
#else
#error "UC8173: Unsupported driver color format"
#endif
typedef struct UC8173_Private {
coord_t flushWindowX;
coord_t flushWindowY;
coord_t flushWindowWidth;
coord_t flushWindowHeight;
} UC8173_Private;
// This function rounds a given integer up to a specified multiple. Note, multiple must be a power of 2!
static GFXINLINE void _roundUp(coord_t* numToRound, uint8_t multiple)
{
*numToRound = (*numToRound + multiple - 1) & ~(multiple - 1);
}
static GFXINLINE void _wait_for_busy_high(GDisplay* g)
{
while (!getpin_busy(g));
}
static GFXINLINE void _wait_for_busy_low(GDisplay* g)
{
while (getpin_busy(g));
}
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void _load_lut(GDisplay* g, uint32_t lutRegister, const uint8_t* lut, uint32_t lutCounter)
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{
uint32_t i;
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write_cmd(g, lutRegister);
for (i = 0; i < lutCounter; i++) {
write_data(g, *lut);
lut++;
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}
}
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static void _upload_lut(GDisplay* g)
{
_load_lut(g, LUT_KWVCOM, _lut_KWvcom_DC_A2_240ms, 32);
_load_lut(g, LUT_KW, _lut_kw_A2_240ms, 512);
_load_lut(g, LUT_FT, _lut_ft, 128);
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}
static void _clear_lut(GDisplay* g)
{
write_cmd(g, PON);
_wait_for_busy_high(g);
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_load_lut(g, LUT_KW, _lut_None, 42);
_load_lut(g, LUT_KWVCOM, _lut_None, 42);
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write_cmd(g, POF);
_wait_for_busy_low(g);
}
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#if GDISP_NEED_CONTROL && GDISP_HARDWARE_CONTROL
static void _invertFramebuffer(GDisplay* g)
{
uint32_t i;
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for (i = 0; i < LINE_BYTES*GDISP_SCREEN_HEIGHT; i++) {
FRAMEBUFFER(g)[i] = ~(FRAMEBUFFER(g)[i]);
}
// We should flush these changes to the display controller framebuffer at some point
g->flags |= GDISP_FLG_NEEDFLUSH;
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}
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#endif
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LLDSPEC bool_t gdisp_lld_init(GDisplay* g)
{
// Allocate the private area plus the framebuffer
g->priv = gfxAlloc(sizeof(UC8173_Private) + LINE_BYTES*GDISP_SCREEN_HEIGHT);
if (!g->priv) {
return FALSE;
}
// Initialize the private area
PRIV(g)->flushWindowX = 0;
PRIV(g)->flushWindowY = 0;
PRIV(g)->flushWindowWidth = GDISP_SCREEN_WIDTH;
PRIV(g)->flushWindowHeight = GDISP_SCREEN_HEIGHT;
// Initialise the board interface
if (!init_board(g)) {
return FALSE;
}
// Hardware reset
setpin_reset(g, FALSE);
gfxSleepMilliseconds(100);
setpin_reset(g, TRUE);
gfxSleepMilliseconds(1000);
// Acquire the bus
acquire_bus(g);
// Booster soft-start
write_cmd(g, BTST);
write_data(g, 0x17); //0x17
write_data(g, 0x97); //0x97
write_data(g, 0x20); //0x20
// Power settings
write_cmd(g, PWR);
write_data(g, 0x03);
write_data(g, 0x00);
write_data(g, 0x2B); //1C 2B
write_data(g, 0x2B); //1C 2B
write_data(g, 0x00);
// Power-on
write_cmd(g, PON);
_wait_for_busy_high(g);
// Panel setting register
write_cmd(g, PSR);
write_data(g, 0x0F); //0x0B
write_data(g, 0x86); //0x86
// Power-off sequence
write_cmd(g, PFS);
write_data(g, 0x00);
// PLL control
write_cmd(g, LPRD);
write_data(g, 0x25);
// Internal temperature sensor enable
write_cmd(g, TSE);
write_data(g, 0x00); // Use internal temperature sensor
// VCOM and data interval settings
write_cmd(g, CDI);
write_data(g, 0xE1);
write_data(g, 0x20);
write_data(g, 0x10);
// Set display panel resolution
write_cmd(g, TRES);
write_data(g, 0xEF);
write_data(g, 0x00);
write_data(g, 0xEF);
// Undocumented register, taken from sample code
write_cmd(g, GDS);
write_data(g, 0xA9);
write_data(g, 0xA9);
write_data(g, 0xEB);
write_data(g, 0xEB);
write_data(g, 0x02);
// Auto measure VCOM
write_cmd(g, AMV);
write_data(g, 0x11); // 5 seconds, enabled
_wait_for_busy_high(g);
// Get current VCOM value
// write_cmd(g, VV);
// unsigned char vcom_temp = spi_9b_get();
// vcom_temp = vcom_temp + 4;
// Auto_VCOM = vcom_temp;
// VCM_DC setting
write_cmd(g, VDCS);
write_data(g, 0x12); // Write vcom_temp here
// Undocumented register, taken from sample code
write_cmd(g, VBDS);
write_data(g, 0x22);
// Undocumented register, taken from sample code
write_cmd(g, LVSEL);
write_data(g, 0x02);
// Undocumented register, taken from sample code
write_cmd(g, GBS);
write_data(g, 0x02);
write_data(g, 0x02);
// Undocumented register, taken from sample code
write_cmd(g, GSS);
write_data(g, 0x02);
write_data(g, 0x02);
// Undocumented register, taken from sample code
write_cmd(g, DF); // For REGAL (???)
write_data(g, 0x1F);
// Clear the look-up table
_clear_lut(g);
// Finish Init
post_init_board(g);
// Release the bus
release_bus(g);
// Initialise the GDISP structure
g->g.Width = GDISP_SCREEN_WIDTH;
g->g.Height = GDISP_SCREEN_HEIGHT;
g->g.Orientation = GDISP_ROTATE_0;
g->g.Powermode = powerOn;
g->g.Backlight = 0;
g->g.Contrast = 0;
return TRUE;
}
#if GDISP_HARDWARE_FLUSH
LLDSPEC void gdisp_lld_flush(GDisplay* g)
{
coord_t y;
// Don't flush unless we really need to
if (!(g->flags & GDISP_FLG_NEEDFLUSH)) {
return;
}
// Round the flushing window width and height up to the next multiple of four
_roundUp(&(PRIV(g)->flushWindowWidth), 4);
_roundUp(&(PRIV(g)->flushWindowWidth), 4);
// Acquire the bus to communicate with the display controller
acquire_bus(g);
// Upload the new temperature LUT
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_upload_lut(g);
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// Setup the window
write_cmd(g, DTMW);
write_data(g, (uint8_t)((PRIV(g)->flushWindowX >> 0) & 0xFF));
write_data(g, (uint8_t)((PRIV(g)->flushWindowY >> 8) & 0x03));
write_data(g, (uint8_t)((PRIV(g)->flushWindowY >> 0) & 0xFF));
write_data(g, (uint8_t)((((PRIV(g)->flushWindowWidth)-1) >> 0) & 0xFF));
write_data(g, (uint8_t)((((PRIV(g)->flushWindowHeight)-1) >> 8) & 0x03));
write_data(g, (uint8_t)((((PRIV(g)->flushWindowHeight)-1) >> 0) & 0xFF));
// Dump our framebuffer
// Note: The display controller doesn't allow changing the vertical scanning direction
// so we have to manually send the lines "the other way around" here.
write_cmd(g, WRITEBUFCMD);
for (y = GDISP_SCREEN_HEIGHT-1; y >= 0; y--) {
write_data_burst(g, FRAMEBUFFER(g)+y*LINE_BYTES, LINE_BYTES);
}
// Power-up the DC/DC converter to update the display panel
write_cmd(g, PON);
_wait_for_busy_high(g);
// Refresh the panel contents
write_cmd(g, DRF);
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write_data(g, 0x00); // Enable REGAL function
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write_data(g, 0x00);
write_data(g, 0x00);
write_data(g, 0x00);
write_data(g, 0xEF);
write_data(g, 0x00);
write_data(g, 0xEF);
_wait_for_busy_high(g);
// Power-down the DC/DC converter to make all the low-power pussys happy
write_cmd(g, POF);
_wait_for_busy_low(g);
// Release the bus again
release_bus(g);
// Clear the 'need-flushing' flag
g->flags &=~ GDISP_FLG_NEEDFLUSH;
}
#endif
#if GDISP_HARDWARE_DRAWPIXEL
LLDSPEC void gdisp_lld_draw_pixel(GDisplay* g)
{
coord_t x, y;
LLDCOLOR_TYPE *p;
// Handle the different possible orientations
switch(g->g.Orientation) {
default:
case GDISP_ROTATE_0:
x = g->p.x;
y = g->p.y;
break;
case GDISP_ROTATE_90:
x = g->p.y;
y = GDISP_SCREEN_HEIGHT-1 - g->p.x;
break;
case GDISP_ROTATE_180:
x = GDISP_SCREEN_WIDTH-1 - g->p.x;
y = GDISP_SCREEN_HEIGHT-1 - g->p.y;
break;
case GDISP_ROTATE_270:
x = GDISP_SCREEN_WIDTH-1 - g->p.y;
y = g->p.x;
break;
}
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// Modify the framebuffer content
p = &FRAMEBUFFER(g)[xyaddr(x,y)];
*p &=~ xybit(x, LLDCOLOR_MASK());
*p |= xybit(x, gdispColor2Native(g->p.color));
// ToDo
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// There appears to be an issue in the silicone, still talking to the manufacturer about this one. Update will follow!
#if 0
// Update the flush window region
if (g->flags & GDISP_FLG_NEEDFLUSH) {
if (x < PRIV(g)->flushWindowX)
PRIV(g)->flushWindowX = x;
if (y < PRIV(g)->flushWindowY)
PRIV(g)->flushWindowY = y;
if (x > PRIV(g)->flushWindowX + PRIV(g)->flushWindowWidth)
PRIV(g)->flushWindowWidth =
} else {
PRIV(g)->flushWindowX = x;
PRIV(g)->flushWindowY = y;
PRIV(g)->flushWindowWidth = 1;
PRIV(g)->flushWindowHeight = 1;
}
#else
PRIV(g)->flushWindowX = 0;
PRIV(g)->flushWindowY = 0;
PRIV(g)->flushWindowWidth = GDISP_SCREEN_WIDTH;
PRIV(g)->flushWindowHeight = GDISP_SCREEN_HEIGHT;
#endif
// We should flush these changes to the display controller framebuffer at some point
g->flags |= GDISP_FLG_NEEDFLUSH;
}
#endif
#if GDISP_NEED_CONTROL && GDISP_HARDWARE_CONTROL
LLDSPEC void gdisp_lld_control(GDisplay* g) {
switch(g->p.x) {
case GDISP_CONTROL_INVERT:
_invertFramebuffer(g);
break;
default:
break;
}
}
#endif
#endif // GFX_USE_GDISP