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TFT_eSPI
Commit 40e2c8dc authored by Bodmer's avatar Bodmer
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Update so read TFT works for ILI9488 SPI display 

Small performance improvement for ILI9488
parent 27d80339
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Showing with 91 additions and 38 deletions
TFT_eSPI.cpp
View file @ 40e2c8dc
......@@ -603,11 +603,20 @@ uint16_t TFT_eSPI::readPixel(int32_t x0, int32_t y0)
// Dummy read to throw away don't care value
tft_Write_8(0);
// Read window pixel 24 bit RGB values
uint8_t r = tft_Write_8(0);
uint8_t g = tft_Write_8(0);
uint8_t b = tft_Write_8(0);
// Read the 3 RGB bytes, colour is actually only in the top 6 bits of each byte
// as the TFT stores colours as 18 bits
#if !defined (ILI9488_DRIVER)
uint8_t r = tft_Write_8(0);
uint8_t g = tft_Write_8(0);
uint8_t b = tft_Write_8(0);
#else
// The 6 colour bits are in MS 6 bits of each byte, but the ILI9488 needs an extra clock pulse
// so bits appear shifted right 1 bit, so mask the middle 6 bits then shift 1 place left
uint8_t r = (tft_Write_8(0)&0x7E)<<1;
uint8_t g = (tft_Write_8(0)&0x7E)<<1;
uint8_t b = (tft_Write_8(0)&0x7E)<<1;
#endif
CS_H;
......@@ -734,11 +743,20 @@ void TFT_eSPI::readRect(uint32_t x, uint32_t y, uint32_t w, uint32_t h, uint16_t
// Read window pixel 24 bit RGB values
uint32_t len = w * h;
while (len--) {
// Read the 3 RGB bytes, colour is actually only in the top 6 bits of each byte
// as the TFT stores colours as 18 bits
#if !defined (ILI9488_DRIVER)
uint8_t r = tft_Write_8(0);
uint8_t g = tft_Write_8(0);
uint8_t b = tft_Write_8(0);
#else
// The 6 colour bits are in LS 6 bits of each byte but we do not include the extra clock pulse
// so we use a trick and mask the middle 6 bits of the byte, then only shift 1 place left
uint8_t r = (tft_Write_8(0)&0x7E)<<1;
uint8_t g = (tft_Write_8(0)&0x7E)<<1;
uint8_t b = (tft_Write_8(0)&0x7E)<<1;
#endif
// Swapped colour byte order for compatibility with pushRect()
*data++ = (r & 0xF8) | (g & 0xE0) >> 5 | (b & 0xF8) << 5 | (g & 0x1C) << 11;
......@@ -1311,9 +1329,21 @@ void TFT_eSPI::readRectRGB(int32_t x0, int32_t y0, int32_t w, int32_t h, uint8_
while (len--) {
// Read the 3 RGB bytes, colour is actually only in the top 6 bits of each byte
// as the TFT stores colours as 18 bits
// Read the 3 RGB bytes, colour is actually only in the top 6 bits of each byte
// as the TFT stores colours as 18 bits
#if !defined (ILI9488_DRIVER)
*data++ = tft_Write_8(0);
*data++ = tft_Write_8(0);
*data++ = tft_Write_8(0);
#else
// The 6 colour bits are in MS 6 bits of each byte, but the ILI9488 needs an extra clock pulse
// so bits appear shifted right 1 bit, so mask the middle 6 bits then shift 1 place left
*data++ = (tft_Write_8(0)&0x7E)<<1;
*data++ = (tft_Write_8(0)&0x7E)<<1;
*data++ = (tft_Write_8(0)&0x7E)<<1;
#endif
}
CS_H;
......@@ -2144,6 +2174,10 @@ int16_t TFT_eSPI::fontHeight(int16_t font)
return pgm_read_byte( &fontdata[font].height ) * textsize;
}
int16_t TFT_eSPI::fontHeight(void)
{
return fontHeight(textfont);
}
/***************************************************************************************
** Function name: drawChar
......@@ -3079,7 +3113,7 @@ void TFT_eSPI::pushColor(uint16_t color)
** Function name: pushColor
** Description: push a single colour to "len" pixels
***************************************************************************************/
void TFT_eSPI::pushColor(uint16_t color, uint16_t len)
void TFT_eSPI::pushColor(uint16_t color, uint32_t len)
{
spi_begin();
......@@ -4661,47 +4695,64 @@ void writeBlock(uint16_t color, uint32_t repeat)
void writeBlock(uint16_t color, uint32_t repeat)
{
// Split out the colours
uint8_t r = (color & 0xF800)>>8;
uint8_t g = (color & 0x07E0)>>3;
uint8_t b = (color & 0x001F)<<3;
uint32_t r = (color & 0xF800)>>8;
uint32_t g = (color & 0x07E0)<<5;
uint32_t b = (color & 0x001F)<<19;
// Concatenate 4 pixels into three 32 bit blocks
uint32_t r0 = r<<24 | b<<16 | g<<8 | r;
uint32_t r1 = g<<24 | r<<16 | b<<8 | g;
uint32_t r2 = b<<24 | g<<16 | r<<8 | b;
uint32_t r0 = r<<24 | b | g | r;
uint32_t r1 = r0>>8 | g<<16;
uint32_t r2 = r1>>8 | b<<8;
if (repeat > 9)
if (repeat > 19)
{
SET_PERI_REG_BITS(SPI_MOSI_DLEN_REG(SPI_NUM), SPI_USR_MOSI_DBITLEN, 239, SPI_USR_MOSI_DBITLEN_S);
SET_PERI_REG_BITS(SPI_MOSI_DLEN_REG(SPI_NUM), SPI_USR_MOSI_DBITLEN, 479, SPI_USR_MOSI_DBITLEN_S);
while(repeat>9)
while(repeat>19)
{
while (READ_PERI_REG(SPI_CMD_REG(SPI_NUM))&SPI_USR);
WRITE_PERI_REG((SPI_W0_REG(SPI_NUM) + 0), r0);
WRITE_PERI_REG((SPI_W0_REG(SPI_NUM) + 4), r1);
WRITE_PERI_REG((SPI_W0_REG(SPI_NUM) + 8), r2);
WRITE_PERI_REG((SPI_W0_REG(SPI_NUM) + 12), r0);
WRITE_PERI_REG((SPI_W0_REG(SPI_NUM) + 16), r1);
WRITE_PERI_REG((SPI_W0_REG(SPI_NUM) + 20), r2);
WRITE_PERI_REG((SPI_W0_REG(SPI_NUM) + 24), r0);
WRITE_PERI_REG((SPI_W0_REG(SPI_NUM) + 28), r1);
WRITE_PERI_REG(SPI_W0_REG(SPI_NUM), r0);
WRITE_PERI_REG(SPI_W1_REG(SPI_NUM), r1);
WRITE_PERI_REG(SPI_W2_REG(SPI_NUM), r2);
WRITE_PERI_REG(SPI_W3_REG(SPI_NUM), r0);
WRITE_PERI_REG(SPI_W4_REG(SPI_NUM), r1);
WRITE_PERI_REG(SPI_W5_REG(SPI_NUM), r2);
WRITE_PERI_REG(SPI_W6_REG(SPI_NUM), r0);
WRITE_PERI_REG(SPI_W7_REG(SPI_NUM), r1);
WRITE_PERI_REG(SPI_W8_REG(SPI_NUM), r2);
WRITE_PERI_REG(SPI_W9_REG(SPI_NUM), r0);
WRITE_PERI_REG(SPI_W10_REG(SPI_NUM), r1);
WRITE_PERI_REG(SPI_W11_REG(SPI_NUM), r2);
WRITE_PERI_REG(SPI_W12_REG(SPI_NUM), r0);
WRITE_PERI_REG(SPI_W13_REG(SPI_NUM), r1);
WRITE_PERI_REG(SPI_W14_REG(SPI_NUM), r2);
SET_PERI_REG_MASK(SPI_CMD_REG(SPI_NUM), SPI_USR);
repeat -= 10;
repeat -= 20;
}
while (READ_PERI_REG(SPI_CMD_REG(SPI_NUM))&SPI_USR);
}
if (repeat)
{
repeat = (repeat * 24) - 1;
SET_PERI_REG_BITS(SPI_MOSI_DLEN_REG(SPI_NUM), SPI_USR_MOSI_DBITLEN, repeat, SPI_USR_MOSI_DBITLEN_S);
WRITE_PERI_REG((SPI_W0_REG(SPI_NUM) + 0), r0);
WRITE_PERI_REG((SPI_W0_REG(SPI_NUM) + 4), r1);
WRITE_PERI_REG((SPI_W0_REG(SPI_NUM) + 8), r2);
WRITE_PERI_REG((SPI_W0_REG(SPI_NUM) + 12), r0);
WRITE_PERI_REG((SPI_W0_REG(SPI_NUM) + 16), r1);
WRITE_PERI_REG((SPI_W0_REG(SPI_NUM) + 20), r2);
WRITE_PERI_REG((SPI_W0_REG(SPI_NUM) + 24), r0);
WRITE_PERI_REG((SPI_W0_REG(SPI_NUM) + 28), r1);
SET_PERI_REG_BITS(SPI_MOSI_DLEN_REG(SPI_NUM), SPI_USR_MOSI_DBITLEN, (repeat * 24) - 1, SPI_USR_MOSI_DBITLEN_S);
WRITE_PERI_REG(SPI_W0_REG(SPI_NUM), r0);
WRITE_PERI_REG(SPI_W1_REG(SPI_NUM), r1);
WRITE_PERI_REG(SPI_W2_REG(SPI_NUM), r2);
WRITE_PERI_REG(SPI_W3_REG(SPI_NUM), r0);
WRITE_PERI_REG(SPI_W4_REG(SPI_NUM), r1);
WRITE_PERI_REG(SPI_W5_REG(SPI_NUM), r2);
if (repeat > 8 )
{
WRITE_PERI_REG(SPI_W6_REG(SPI_NUM), r0);
WRITE_PERI_REG(SPI_W7_REG(SPI_NUM), r1);
WRITE_PERI_REG(SPI_W8_REG(SPI_NUM), r2);
WRITE_PERI_REG(SPI_W9_REG(SPI_NUM), r0);
WRITE_PERI_REG(SPI_W10_REG(SPI_NUM), r1);
WRITE_PERI_REG(SPI_W11_REG(SPI_NUM), r2);
WRITE_PERI_REG(SPI_W12_REG(SPI_NUM), r0);
WRITE_PERI_REG(SPI_W13_REG(SPI_NUM), r1);
WRITE_PERI_REG(SPI_W14_REG(SPI_NUM), r2);
}
SET_PERI_REG_MASK(SPI_CMD_REG(SPI_NUM), SPI_USR);
while (READ_PERI_REG(SPI_CMD_REG(SPI_NUM))&SPI_USR);
}
......@@ -4714,6 +4765,7 @@ void writeBlock(uint16_t color, uint32_t repeat)
#include "soc/spi_reg.h"
#define SPI_NUM 0x3
void writeBlock(uint16_t color, uint32_t repeat)
{
uint16_t color16 = (color >> 8) | (color << 8);
......
TFT_eSPI.h
View file @ 40e2c8dc
......@@ -538,7 +538,7 @@ class TFT_eSPI : public Print {
// The TFT_eSprite class inherits the following functions
void setWindow(int16_t x0, int16_t y0, int16_t x1, int16_t y1),
pushColor(uint16_t color),
pushColor(uint16_t color, uint16_t len),
pushColor(uint16_t color, uint32_t len),
pushColors(uint16_t *data, uint32_t len, bool swap = true), // With byte swap option
pushColors(uint8_t *data, uint32_t len),
......@@ -565,7 +565,7 @@ class TFT_eSPI : public Print {
drawBitmap(int16_t x, int16_t y, const uint8_t *bitmap, int16_t w, int16_t h, uint16_t color),
drawXBitmap(int16_t x, int16_t y, const uint8_t *bitmap, int16_t w, int16_t h, uint16_t color),
drawXBitmap(int16_t x, int16_t y, const uint8_t *bitmap, int16_t w, int16_t h, uint16_t fgcolor, uint16_t bgcolor),
setBitmapColor(uint16_t c, uint16_t b), // For 1bpp sprites
setBitmapColor(uint16_t fgcolor, uint16_t bgcolor), // For 1bpp sprites
setCursor(int16_t x, int16_t y),
setCursor(int16_t x, int16_t y, uint8_t font),
......@@ -632,7 +632,7 @@ class TFT_eSPI : public Print {
getCursorY(void);
uint16_t fontsLoaded(void),
color565(uint8_t r, uint8_t g, uint8_t b),
color565(uint8_t red, uint8_t green, uint8_t blue), // Convert 8 bit red, green and blue to 16 bits
color8to16(uint8_t color332); // Convert 8 bit colour to 16 bits
int16_t drawNumber(long long_num,int poX, int poY, int font),
......@@ -656,7 +656,8 @@ class TFT_eSPI : public Print {
textWidth(const char *string),
textWidth(const String& string, int font),
textWidth(const String& string),
fontHeight(int16_t font);
fontHeight(int16_t font),
fontHeight(void);
void setAddrWindow(int32_t xs, int32_t ys, int32_t xe, int32_t ye);
......
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