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TFT_eSPI
Commit 091d8cd2 authored by Bodmer's avatar Bodmer
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Fix issue #297 

There is a bug in the ESP8266 Arduino core that averwrites the overlap
mode setup and hold bits for the hardware driven SPI SS line.  The
TFT_eSPI library has been patched as a work-around.

In overlap mode to maintain the required setup and hold times at 80MHz
ESP8266 CPU clock the SPI rate must be 27MHz or less. At 160MHz CPU
clock the SPI rate can be 40MHz.
parent 33d93131
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Showing with 61 additions and 74 deletions
TFT_eSPI.cpp
View file @ 091d8cd2
......@@ -48,10 +48,6 @@ uint8_t readByte(void);
// GPIO parallel input/output control
void busDir(uint32_t mask, uint8_t mode);
// If the SPI library has transaction support, these functions
// establish settings and protect from interference from other
// libraries. Otherwise, they simply do nothing.
inline void TFT_eSPI::spi_begin(void){
#if defined (SPI_HAS_TRANSACTION) && defined (SUPPORT_TRANSACTIONS) && !defined(ESP32_PARALLEL)
if (locked) {locked = false; spi.beginTransaction(SPISettings(SPI_FREQUENCY, MSBFIRST, TFT_SPI_MODE)); CS_L;}
......@@ -77,6 +73,9 @@ inline void TFT_eSPI::spi_begin_read(void){
#endif
CS_L;
#endif
#ifdef ESP8266
SPI1U = SPI1U_READ;
#endif
}
inline void TFT_eSPI::spi_end_read(void){
......@@ -88,6 +87,9 @@ inline void TFT_eSPI::spi_end_read(void){
#endif
CS_H;
#endif
#ifdef ESP8266
SPI1U = SPI1U_WRITE;
#endif
}
#if defined (TOUCH_CS) && defined (SPI_TOUCH_FREQUENCY) // && !defined(ESP32_PARALLEL)
......@@ -279,7 +281,8 @@ void TFT_eSPI::init(uint8_t tc)
spi.pins(6, 7, 8, 0);
#endif
spi.begin(); // This will set HMISO to input
spi.begin(); // This will set HMISO to input
#else
#if !defined(ESP32_PARALLEL)
#if defined (TFT_MOSI) && !defined (TFT_SPI_OVERLAP)
......@@ -313,7 +316,7 @@ void TFT_eSPI::init(uint8_t tc)
spi.setHwCs(1); // Use hardware SS toggling
#endif
#endif
// Set to output once again in case D6 (MISO) is used for DC
#ifdef TFT_DC
digitalWrite(TFT_DC, HIGH); // Data/Command high = data mode
......@@ -1822,8 +1825,9 @@ void TFT_eSPI::drawRect(int32_t x, int32_t y, int32_t w, int32_t h, uint32_t col
drawFastHLine(x, y, w, color);
drawFastHLine(x, y + h - 1, w, color);
drawFastVLine(x, y, h, color);
drawFastVLine(x + w - 1, y, h, color);
// Avoid drawing corner pixels twice
drawFastVLine(x, y+1, h-2, color);
drawFastVLine(x + w - 1, y+1, h-2, color);
inTransaction = false;
spi_end();
......@@ -2420,8 +2424,7 @@ void TFT_eSPI::drawChar(int32_t x, int32_t y, unsigned char c, uint32_t color, u
#if defined (ESP8266) && !defined (ILI9488_DRIVER)
color = (color >> 8) | (color << 8);
bg = (bg >> 8) | (bg << 8);
uint32_t spimask = ~((SPIMMOSI << SPILMOSI) | (SPIMMISO << SPILMISO));
SPI1U1 = (SPI1U1 & spimask) | (15 << SPILMOSI) | (15 << SPILMISO);
for (int8_t j = 0; j < 8; j++) {
for (int8_t k = 0; k < 5; k++ ) {
if (column[k] & mask) {
......@@ -2669,10 +2672,8 @@ void TFT_eSPI::setWindow(int32_t xs, int32_t ys, int32_t xe, int32_t ye)
// Column addr set
DC_C;
uint32_t mask = ~((SPIMMOSI << SPILMOSI) | (SPIMMISO << SPILMISO));
mask = SPI1U1 & mask;
SPI1U1 = mask | (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1U = SPI1U_WRITE;
SPI1U1 = (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1W0 = TFT_CASET;
SPI1CMD |= SPIBUSY;
......@@ -2684,7 +2685,7 @@ void TFT_eSPI::setWindow(int32_t xs, int32_t ys, int32_t xe, int32_t ye)
DC_D;
SPI1U1 = mask | (31 << SPILMOSI) | (31 << SPILMISO);
SPI1U1 = (31 << SPILMOSI) | (31 << SPILMISO);
// Load the two coords as a 32 bit value and shift in one go
SPI1W0 = (xs >> 8) | (uint16_t)(xs << 8) | ((uint8_t)(xe >> 8)<<16 | (xe << 24));
SPI1CMD |= SPIBUSY;
......@@ -2693,7 +2694,7 @@ void TFT_eSPI::setWindow(int32_t xs, int32_t ys, int32_t xe, int32_t ye)
// Row addr set
DC_C;
SPI1U1 = mask | (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1U1 = (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1W0 = TFT_PASET;
SPI1CMD |= SPIBUSY;
......@@ -2701,7 +2702,7 @@ void TFT_eSPI::setWindow(int32_t xs, int32_t ys, int32_t xe, int32_t ye)
DC_D;
SPI1U1 = mask | (31 << SPILMOSI) | (31 << SPILMISO);
SPI1U1 = (31 << SPILMOSI) | (31 << SPILMISO);
// Load the two coords as a 32 bit value and shift in one go
SPI1W0 = (ys >> 8) | (uint16_t)(ys << 8) | ((uint8_t)(ye >> 8)<<16 | (ye << 24));
SPI1CMD |= SPIBUSY;
......@@ -2710,13 +2711,14 @@ void TFT_eSPI::setWindow(int32_t xs, int32_t ys, int32_t xe, int32_t ye)
// write to RAM
DC_C;
SPI1U1 = mask | (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1U1 = (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1W0 = TFT_RAMWR;
SPI1CMD |= SPIBUSY;
while(SPI1CMD & SPIBUSY) {}
DC_D;
SPI1U1 = (15 << SPILMOSI) | (15 << SPILMISO);
//spi_end();
}
......@@ -2732,10 +2734,8 @@ void TFT_eSPI::setWindow(int32_t xs, int32_t ys, int32_t xe, int32_t ye)
// Column addr set
DC_C;
uint32_t mask = ~((SPIMMOSI << SPILMOSI) | (SPIMMISO << SPILMISO));
mask = SPI1U1 & mask;
SPI1U1 = mask | (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1U = SPI1U_WRITE;
SPI1U1 = (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1W0 = TFT_CASET<<8;
SPI1CMD |= SPIBUSY;
......@@ -2749,7 +2749,7 @@ void TFT_eSPI::setWindow(int32_t xs, int32_t ys, int32_t xe, int32_t ye)
// Row addr set
DC_C;
SPI1U1 = mask | (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1U1 = (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1W0 = TFT_PASET<<8;
SPI1CMD |= SPIBUSY;
......@@ -2763,7 +2763,7 @@ void TFT_eSPI::setWindow(int32_t xs, int32_t ys, int32_t xe, int32_t ye)
// write to RAM
DC_C;
SPI1U1 = mask | (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1U1 = (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1W0 = TFT_RAMWR<<8;
SPI1CMD |= SPIBUSY;
while(SPI1CMD & SPIBUSY) {}
......@@ -2780,9 +2780,8 @@ void TFT_eSPI::setWindow(int32_t x0, int32_t y0, int32_t x1, int32_t y1)
{
//spi_begin(); // Must be called before setWimdow
uint32_t mask = ~((SPIMMOSI << SPILMOSI) | (SPIMMISO << SPILMISO));
mask = SPI1U1 & mask;
SPI1U1 = mask | (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1U = SPI1U_WRITE;
SPI1U1 = (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
// Column addr set
DC_C;
......@@ -2932,10 +2931,8 @@ void TFT_eSPI::readAddrWindow(int32_t xs, int32_t ys, int32_t w, int32_t h)
// Column addr set
DC_C;
uint32_t mask = ~((SPIMMOSI << SPILMOSI) | (SPIMMISO << SPILMISO));
mask = SPI1U1 & mask;
SPI1U1 = mask | (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1U = SPI1U_WRITE;
SPI1U1 = (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1W0 = TFT_CASET;
SPI1CMD |= SPIBUSY;
......@@ -2943,7 +2940,7 @@ void TFT_eSPI::readAddrWindow(int32_t xs, int32_t ys, int32_t w, int32_t h)
DC_D;
SPI1U1 = mask | (31 << SPILMOSI) | (31 << SPILMISO);
SPI1U1 = (31 << SPILMOSI) | (31 << SPILMISO);
// Load the two coords as a 32 bit value and shift in one go
SPI1W0 = (xs >> 8) | (uint16_t)(xs << 8) | ((uint8_t)(xe >> 8)<<16 | (xe << 24));
SPI1CMD |= SPIBUSY;
......@@ -2952,7 +2949,7 @@ void TFT_eSPI::readAddrWindow(int32_t xs, int32_t ys, int32_t w, int32_t h)
// Row addr set
DC_C;
SPI1U1 = mask | (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1U1 = (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1W0 = TFT_PASET;
SPI1CMD |= SPIBUSY;
......@@ -2960,7 +2957,7 @@ void TFT_eSPI::readAddrWindow(int32_t xs, int32_t ys, int32_t w, int32_t h)
DC_D;
SPI1U1 = mask | (31 << SPILMOSI) | (31 << SPILMISO);
SPI1U1 = (31 << SPILMOSI) | (31 << SPILMISO);
// Load the two coords as a 32 bit value and shift in one go
SPI1W0 = (ys >> 8) | (uint16_t)(ys << 8) | ((uint8_t)(ye >> 8)<<16 | (ye << 24));
SPI1CMD |= SPIBUSY;
......@@ -2969,7 +2966,7 @@ void TFT_eSPI::readAddrWindow(int32_t xs, int32_t ys, int32_t w, int32_t h)
// read from RAM
DC_C;
SPI1U1 = mask | (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1U1 = (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1W0 = TFT_RAMRD;
SPI1CMD |= SPIBUSY;
while(SPI1CMD & SPIBUSY) {}
......@@ -3043,14 +3040,13 @@ void TFT_eSPI::drawPixel(int32_t x, int32_t y, uint32_t color)
spi_begin();
uint32_t mask = ~((SPIMMOSI << SPILMOSI) | (SPIMMISO << SPILMISO));
mask = SPI1U1 & mask;
SPI1U = SPI1U_WRITE;
// No need to send x if it has not changed (speeds things up)
if (addr_col != x) {
DC_C;
SPI1U1 = mask | (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1U1 = (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1W0 = TFT_CASET<<(CMD_BITS + 1 - 8);
SPI1CMD |= SPIBUSY;
while(SPI1CMD & SPIBUSY) {}
......@@ -3061,7 +3057,7 @@ void TFT_eSPI::drawPixel(int32_t x, int32_t y, uint32_t color)
uint8_t cBin[] = { 0, (uint8_t) (x>>8), 0, (uint8_t) (x>>0)};
spi.writePattern(&cBin[0], 4, 2);
#else
SPI1U1 = mask | (31 << SPILMOSI) | (31 << SPILMISO);
SPI1U1 = (31 << SPILMOSI) | (31 << SPILMISO);
// Load the two coords as a 32 bit value and shift in one go
uint32_t xswap = (x >> 8) | (uint16_t)(x << 8);
SPI1W0 = xswap | (xswap << 16);
......@@ -3077,7 +3073,7 @@ void TFT_eSPI::drawPixel(int32_t x, int32_t y, uint32_t color)
DC_C;
SPI1U1 = mask | (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1U1 = (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1W0 = TFT_PASET<<(CMD_BITS + 1 - 8);
SPI1CMD |= SPIBUSY;
......@@ -3089,7 +3085,7 @@ void TFT_eSPI::drawPixel(int32_t x, int32_t y, uint32_t color)
uint8_t cBin[] = { 0, (uint8_t) (y>>8), 0, (uint8_t) (y>>0)};
spi.writePattern(&cBin[0], 4, 2);
#else
SPI1U1 = mask | (31 << SPILMOSI) | (31 << SPILMISO);
SPI1U1 = (31 << SPILMOSI) | (31 << SPILMISO);
// Load the two coords as a 32 bit value and shift in one go
uint32_t yswap = (y >> 8) | (uint16_t)(y << 8);
SPI1W0 = yswap | (yswap << 16);
......@@ -3102,7 +3098,7 @@ void TFT_eSPI::drawPixel(int32_t x, int32_t y, uint32_t color)
DC_C;
SPI1U1 = mask | (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1U1 = (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1W0 = TFT_RAMWR<<(CMD_BITS + 1 - 8);
SPI1CMD |= SPIBUSY;
......@@ -3113,7 +3109,7 @@ void TFT_eSPI::drawPixel(int32_t x, int32_t y, uint32_t color)
#if defined (ILI9488_DRIVER)
tft_Write_16(color);
#else
SPI1U1 = mask | (15 << SPILMOSI) | (15 << SPILMISO);
SPI1U1 = (15 << SPILMOSI) | (15 << SPILMISO);
SPI1W0 = (color >> 8) | (color << 8);
SPI1CMD |= SPIBUSY;
......@@ -3134,9 +3130,8 @@ void TFT_eSPI::drawPixel(int32_t x, int32_t y, uint32_t color)
spi_begin();
uint32_t mask = ~((SPIMMOSI << SPILMOSI) | (SPIMMISO << SPILMISO));
mask = SPI1U1 & mask;
SPI1U1 = mask | (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
SPI1U = SPI1U_WRITE;
SPI1U1 = (CMD_BITS << SPILMOSI) | (CMD_BITS << SPILMISO);
// No need to send x if it has not changed (speeds things up)
if (addr_col != x) {
DC_C;
......@@ -3404,9 +3399,9 @@ void TFT_eSPI::pushColors(uint16_t *data, uint32_t len, bool swap)
uint32_t color[8];
uint32_t mask = ~((SPIMMOSI << SPILMOSI) | (SPIMMISO << SPILMISO));
SPI1U = SPI1U_WRITE;
SPI1U1 = (255 << SPILMOSI) | (255 << SPILMISO);
SPI1U1 = (SPI1U1 & mask) | (255 << SPILMOSI) | (255 << SPILMISO);
while(len>15)
{
......@@ -3461,7 +3456,7 @@ void TFT_eSPI::pushColors(uint16_t *data, uint32_t len, bool swap)
memcpy(color,data,len<<1);
}
while(SPI1CMD & SPIBUSY) {}
SPI1U1 = (SPI1U1 & mask) | (bits << SPILMOSI) | (bits << SPILMISO);
SPI1U1 = (bits << SPILMOSI) | (bits << SPILMISO);
SPI1W0 = color[0];
SPI1W1 = color[1];
SPI1W2 = color[2];
......@@ -3572,9 +3567,6 @@ void TFT_eSPI::drawLine(int32_t x0, int32_t y0, int32_t x1, int32_t y1, uint32_t
spi_begin();
uint32_t mask = ~((SPIMMOSI << SPILMOSI) | (SPIMMISO << SPILMISO));
mask = (SPI1U1 & mask) | (15 << SPILMOSI) | (15 << SPILMISO);
SPI1U = SPIUMOSI | SPIUSSE;
int16_t swapped_color = (color >> 8) | (color << 8);
if (steep) // y increments every iteration (y0 is x-axis, and x0 is y-axis)
......@@ -3593,7 +3585,6 @@ void TFT_eSPI::drawLine(int32_t x0, int32_t y0, int32_t x1, int32_t y1, uint32_t
if (x0 > x1) {spi_end(); return;}
setWindow(y0, x0, y0, _height);
SPI1U1 = mask;
SPI1W0 = swapped_color;
for (; x0 <= x1; x0++) {
while(SPI1CMD & SPIBUSY) {}
......@@ -3606,7 +3597,6 @@ void TFT_eSPI::drawLine(int32_t x0, int32_t y0, int32_t x1, int32_t y1, uint32_t
err += dx;
while(SPI1CMD & SPIBUSY) {}
setWindow(y0, x0+1, y0, _height);
SPI1U1 = mask;
SPI1W0 = swapped_color;
}
}
......@@ -3627,7 +3617,6 @@ void TFT_eSPI::drawLine(int32_t x0, int32_t y0, int32_t x1, int32_t y1, uint32_t
if (x0 > x1) {spi_end(); return;}
setWindow(x0, y0, _width, y0);
SPI1U1 = mask;
SPI1W0 = swapped_color;
for (; x0 <= x1; x0++) {
while(SPI1CMD & SPIBUSY) {}
......@@ -3640,14 +3629,12 @@ void TFT_eSPI::drawLine(int32_t x0, int32_t y0, int32_t x1, int32_t y1, uint32_t
err += dx;
while(SPI1CMD & SPIBUSY) {}
setWindow(x0+1, y0, _width, y0);
SPI1U1 = mask;
SPI1W0 = swapped_color;
}
}
}
while(SPI1CMD & SPIBUSY) {}
SPI1U = SPIUMOSI | SPIUDUPLEX | SPIUSSE;
spi_end();
}
......@@ -3699,7 +3686,6 @@ void TFT_eSPI::drawFastVLine(int32_t x, int32_t y, int32_t h, uint32_t color)
#ifdef RPI_WRITE_STROBE
#if defined (ESP8266)
// SPI1U1 will already be set to transfer 16 bits by setWindow()
SPI1W0 = (color >> 8) | (color << 8);
SPI1CMD |= SPIBUSY;
while(SPI1CMD & SPIBUSY) {}
......@@ -3764,7 +3750,6 @@ void TFT_eSPI::drawFastHLine(int32_t x, int32_t y, int32_t w, uint32_t color)
#ifdef RPI_WRITE_STROBE
#if defined (ESP8266)
// SPI1U1 will already be set to transfer 16 bits by setWindow()
SPI1W0 = (color >> 8) | (color << 8);
SPI1CMD |= SPIBUSY;
while(SPI1CMD & SPIBUSY) {}
......@@ -4809,9 +4794,8 @@ void writeBlock(uint16_t color, uint32_t repeat)
{
uint16_t color16 = (color >> 8) | (color << 8);
uint32_t color32 = color16 | color16 << 16;
uint32_t mask = ~(SPIMMOSI << SPILMOSI);
mask = SPI1U1 & mask;
SPI1U = SPIUMOSI | SPIUSSE;
SPI1U = SPI1U_WRITE;
SPI1W0 = color32;
SPI1W1 = color32;
......@@ -4840,7 +4824,7 @@ void writeBlock(uint16_t color, uint32_t repeat)
}
if (repeat > 31)
{
SPI1U1 = mask | (511 << SPILMOSI);
SPI1U1 = (511 << SPILMOSI);
while(repeat>31)
{
#if defined SPI_FREQUENCY && (SPI_FREQUENCY == 80000000)
......@@ -4856,12 +4840,11 @@ void writeBlock(uint16_t color, uint32_t repeat)
if (repeat)
{
repeat = (repeat << 4) - 1;
SPI1U1 = mask | (repeat << SPILMOSI);
SPI1U1 = (repeat << SPILMOSI);
SPI1CMD |= SPIBUSY;
while(SPI1CMD & SPIBUSY) {}
}
SPI1U = SPIUMOSI | SPIUDUPLEX | SPIUSSE;
}
#elif defined (ILI9488_DRIVER)
......@@ -4870,9 +4853,7 @@ void writeBlock(uint16_t color, uint32_t repeat)
void writeBlock(uint16_t color, uint32_t repeat)
{
uint32_t mask = ~(SPIMMOSI << SPILMOSI);
mask = SPI1U1 & mask;
SPI1U = SPIUMOSI | SPIUSSE;
SPI1U = SPI1U_WRITE;
// Split out the colours
uint8_t r = (color & 0xF800)>>8;
......@@ -4912,7 +4893,7 @@ void writeBlock(uint16_t color, uint32_t repeat)
if (repeat > 20)
{
SPI1U1 = mask | (503 << SPILMOSI);
SPI1U1 = (503 << SPILMOSI);
while(repeat>20)
{
while(SPI1CMD & SPIBUSY) {}
......@@ -4925,12 +4906,11 @@ void writeBlock(uint16_t color, uint32_t repeat)
if (repeat)
{
repeat = (repeat * 24) - 1;
SPI1U1 = mask | (repeat << SPILMOSI);
SPI1U1 = (repeat << SPILMOSI);
SPI1CMD |= SPIBUSY;
while(SPI1CMD & SPIBUSY) {}
}
SPI1U = SPIUMOSI | SPIUDUPLEX | SPIUSSE;
}
#else // Now the code for ESP32 and ILI9488
......
TFT_eSPI.h
View file @ 091d8cd2
......@@ -15,7 +15,7 @@
#ifndef _TFT_eSPIH_
#define _TFT_eSPIH_
#define TFT_ESPI_VERSION "1.4.1"
#define TFT_ESPI_VERSION "1.4.2"
//#define ESP32 //Just used to test ESP32 options
......@@ -172,6 +172,13 @@
#if defined (TFT_SPI_OVERLAP)
#undef TFT_CS
#define SPI1U_WRITE (SPIUMOSI | SPIUSSE | SPIUCSSETUP | SPIUCSHOLD)
#define SPI1U_READ (SPIUMOSI | SPIUSSE | SPIUCSSETUP | SPIUCSHOLD | SPIUDUPLEX)
#else
#ifdef ESP8266
#define SPI1U_WRITE (SPIUMOSI | SPIUSSE)
#define SPI1U_READ (SPIUMOSI | SPIUSSE | SPIUDUPLEX)
#endif
#endif
#ifndef TFT_CS
......
library.json
View file @ 091d8cd2
{
"name": "TFT_eSPI",
"version": "1.4.1",
"version": "1.4.2",
"keywords": "tft, ePaper, display, ESP8266, NodeMCU, ESP32, M5Stack, ILI9341, ST7735, ILI9163, S6D02A1, ILI9486, ST7789",
"description": "A TFT and ePaper SPI graphics library for ESP8266 and ESP32",
"repository":
......
library.properties
View file @ 091d8cd2
name=TFT_eSPI
version=1.4.1
version=1.4.2
author=Bodmer
maintainer=Bodmer
sentence=A fast TFT graphics library for ESP8266 and ESP32 processors for the Arduino IDE
......
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