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Use 9-bit hardware SPI for ST7787 drawPixel()

This commit is contained in:
Kristian Nielsen 2017-06-29 03:08:01 +02:00
parent 81b97a25b9
commit cf0040be4f
1 changed files with 57 additions and 1 deletions
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58
TFT_eSPI.cpp
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@ -2337,7 +2337,62 @@ void TFT_eSPI::readAddrWindow(int32_t x0, int32_t y0, int32_t x1, int32_t y1)
** Function name: drawPixel ** Function name: drawPixel
** Description: push a single pixel at an arbitrary position ** Description: push a single pixel at an arbitrary position
***************************************************************************************/ ***************************************************************************************/
#ifdef ST7787_DRIVER #ifdef IFACE_3WIRE
#ifdef IFACE_3WIRE_ESP8266
void TFT_eSPI::drawPixel(uint32_t x, uint32_t y, uint32_t color)
{
// Faster range checking, possible because x and y are unsigned
if ((x >= _width) || (y >= _height)) return;
#ifdef CGRAM_OFFSET
x+=colstart;
y+=rowstart;
#endif
spi_begin();
CS_L;
uint32_t mask = ~((SPIMMOSI << SPILMOSI) | (SPIMMISO << SPILMISO));
mask = SPI1U1 & mask;
uint32_t cur, pos;
volatile uint32_t *spireg;
uint32_t numbits = 27;
STARTBITS(cur, pos, spireg);
// No need to send x if it has not changed (speeds things up)
if (addr_col != x) {
ADDBITS(((uint32_t)TFT_CASET << 18) | ((uint32_t)0x20100 | ((x & 0xff00) << 1) | (x & 0xff)),
27, cur, pos, spireg);
ADDBITS((uint32_t)0x20100 | ((x & 0xff00) << 1) | (x & 0xff), 18, cur, pos, spireg);
numbits += 45;
addr_col = x;
}
// No need to send y if it has not changed (speeds things up)
if (addr_row != y) {
ADDBITS(((uint32_t)TFT_PASET << 18) | ((uint32_t)0x20100 | ((y & 0xff00) << 1) | (y & 0xff)),
27, cur, pos, spireg);
ADDBITS((uint32_t)0x20100 | ((y & 0xff00) << 1) | (y & 0xff), 18, cur, pos, spireg);
numbits += 45;
addr_row = y;
}
ADDBITS(((uint32_t)TFT_RAMWR << 18) | (uint32_t)0x20100 | ((color & 0xff00) << 1) | (color & 0xff),
27, cur, pos, spireg);
FLUSHBITS(cur, spireg);
SPI1U1 = mask | (numbits << SPILMOSI) | (numbits << SPILMISO);
SPI1CMD |= SPIBUSY;
while(SPI1CMD & SPIBUSY) {}
CS_H;
spi_end();
}
#else
void TFT_eSPI::drawPixel(uint32_t x, uint32_t y, uint32_t color) void TFT_eSPI::drawPixel(uint32_t x, uint32_t y, uint32_t color)
{ {
uint8_t buf[4]; uint8_t buf[4];
@ -2380,6 +2435,7 @@ void TFT_eSPI::drawPixel(uint32_t x, uint32_t y, uint32_t color)
spi_end(); spi_end();
} }
#endif
#elif defined (ESP8266) && !defined (RPI_WRITE_STROBE) #elif defined (ESP8266) && !defined (RPI_WRITE_STROBE)
void TFT_eSPI::drawPixel(uint32_t x, uint32_t y, uint32_t color) void TFT_eSPI::drawPixel(uint32_t x, uint32_t y, uint32_t color)