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ILI9486_t3n.cpp
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// This library is for Waveshare 4inch RPi LCD (C) with ILI9486 and Teensy 4.x usage only
// Forked from:
// https://github.com/kurte/ILI9341_t3n
#include "ILI9486_t3n.h"
#include <SPI.h>
//#define DEBUG_ASYNC_UPDATE // Enable to print out dma info
//#define DEBUG_ASYNC_LEDS // Enable to use digitalWrites to Debug
#ifdef DEBUG_ASYNC_LEDS
#define DEBUG_PIN_1 0
#define DEBUG_PIN_2 1
#define DEBUG_PIN_3 4
#endif
#ifdef ENABLE_ILI9486_FRAMEBUFFER
#define CBALLOC (ILI9486_TFTHEIGHT*ILI9486_TFTWIDTH*2)
#define COUNT_WORDS_WRITE ((ILI9486_TFTHEIGHT*ILI9486_TFTWIDTH)/SCREEN_DMA_NUM_SETTINGS) // Note I know the divide will give whole number
#if defined(__MK66FX1M0__)
// T3.6 use Scatter/gather with chain to do transfer
DMASetting ILI9486_t3n::_dmasettings[4];
DMAChannel ILI9486_t3n::_dmatx;
#elif defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
//DMASetting ILI9486_t3n::_dmasettings[4];
//DMAChannel ILI9486_t3n::_dmatx;
#elif defined(__MK64FX512__)
// T3.5 - had issues scatter/gather so do just use channels/interrupts
// and update and continue
DMAChannel ILI9486_t3n::_dmatx;
DMAChannel ILI9486_t3n::_dmarx;
uint16_t ILI9486_t3n::_dma_count_remaining;
uint16_t ILI9486_t3n::_dma_write_size_words;
volatile short _dma_dummy_rx;
#endif
#if defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
ILI9486_t3n *ILI9486_t3n::_dmaActiveDisplay[3] = {0, 0, 0};
#else
ILI9486_t3n *ILI9486_t3n::_dmaActiveDisplay = 0;
#endif
//volatile uint8_t ILI9486_t3n::_dma_state = 0; // Use pointer to this as a way to get back to object...
//volatile uint32_t ILI9486_t3n::_dma_frame_count = 0; // Can return a frame count...
#if defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
void ILI9486_t3n::dmaInterrupt(void) {
if (_dmaActiveDisplay[0]) {
_dmaActiveDisplay[0]->process_dma_interrupt();
}
}
void ILI9486_t3n::dmaInterrupt1(void) {
if (_dmaActiveDisplay[1]) {
_dmaActiveDisplay[1]->process_dma_interrupt();
}
}
void ILI9486_t3n::dmaInterrupt2(void) {
if (_dmaActiveDisplay[2]) {
_dmaActiveDisplay[2]->process_dma_interrupt();
}
}
#else
void ILI9486_t3n::dmaInterrupt(void) {
if (_dmaActiveDisplay) {
_dmaActiveDisplay->process_dma_interrupt();
}
}
#endif
#ifdef DEBUG_ASYNC_UPDATE
extern void dumpDMA_TCD(DMABaseClass *dmabc, const char *psx_title);
#endif
void ILI9486_t3n::process_dma_interrupt(void) {
#ifdef DEBUG_ASYNC_LEDS
digitalWriteFast(DEBUG_PIN_2, HIGH);
#endif
#if defined(__MK66FX1M0__)
// T3.6
_dmatx.clearInterrupt();
#ifdef DEBUG_ASYNC_UPDATE
static uint8_t print_count;
if (print_count < 10) {
print_count++;
Serial.printf("TCD: %x D1:%x %x%c\n", (uint32_t)_dmatx.TCD->SADDR ,
(uint32_t)_dmasettings[1].TCD->SADDR, (uint32_t)_dmatx.TCD->DLASTSGA,
(_dmatx.TCD->SADDR > _dmasettings[1].TCD->SADDR)? '>' : '<');
}
#endif
if (_frame_callback_on_HalfDone && (_dmatx.TCD->SADDR > _dmasettings[1].TCD->SADDR)) {
_dma_sub_frame_count = 1; // set as partial frame.
} else {
_dma_frame_count++;
// See if we are in continuous mode or not..
if ((_dma_state & ILI9486_DMA_CONT) == 0) {
// We are in single refresh mode or the user has called cancel so
// Lets try to release the CS pin
waitFifoNotFull();
writecommand_last(ILI9486_NOP);
endSPITransaction();
_dma_state &= ~ILI9486_DMA_ACTIVE;
_dmaActiveDisplay = 0; // We don't have a display active any more...
}
_dma_sub_frame_count = 0; // set as partial frame.
}
if (_frame_complete_callback) (*_frame_complete_callback)();
// See if we should do call back or not...
#elif defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
// T4
#ifdef DEBUG_ASYNC_UPDATE
static uint8_t print_count;
if (print_count < 10) {
print_count++;
Serial.printf("TCD: %x D1:%x %x%c\n", (uint32_t)_dmatx.TCD->SADDR ,
(uint32_t)_dmasettings[1].TCD->SADDR, (uint32_t)_dmatx.TCD->DLASTSGA,
(_dmatx.TCD->SADDR > _dmasettings[1].TCD->SADDR)? '>' : '<');
}
#endif
_dmatx.clearInterrupt();
if (_frame_callback_on_HalfDone && (_dmatx.TCD->SADDR > _dmasettings[1].TCD->SADDR)) {
_dma_sub_frame_count = 1; // set as partial frame.
if (_frame_complete_callback) (*_frame_complete_callback)();
//Serial.print("-");
} else {
_dma_frame_count++;
_dma_sub_frame_count = 0;
//Serial.print(".");
//if ((_dma_frame_count & 0x1f) == 0)Serial.println();
#ifdef DEBUG_ASYNC_LEDS
digitalWriteFast(DEBUG_PIN_3, HIGH);
#endif
// See if we are in continuous mode or not..
if ((_dma_state & ILI9486_DMA_CONT) == 0) {
// We are in single refresh mode or the user has called cancel so
// Lets try to release the CS pin
//Serial.printf("Before FSR wait: %x %x\n", _pimxrt_spi->FSR, _pimxrt_spi->SR);
while (_pimxrt_spi->FSR & 0x1f) ; // wait until this one is complete
//Serial.printf("Before SR busy wait: %x\n", _pimxrt_spi->SR);
while (_pimxrt_spi->SR & LPSPI_SR_MBF) ; // wait until this one is complete
_dmatx.clearComplete();
//Serial.println("Restore FCR");
_pimxrt_spi->FCR = LPSPI_FCR_TXWATER(15); // _spi_fcr_save; // restore the FSR status...
_pimxrt_spi->DER = 0; // DMA no longer doing TX (or RX)
_pimxrt_spi->CR = LPSPI_CR_MEN | LPSPI_CR_RRF | LPSPI_CR_RTF; // actually clear both...
_pimxrt_spi->SR = 0x3f00; // clear out all of the other status...
maybeUpdateTCR(_tcr_dc_assert | LPSPI_TCR_FRAMESZ(7)); // output Command with 8 bits
// Serial.printf("Output NOP (SR %x CR %x FSR %x FCR %x %x TCR:%x)\n", _pimxrt_spi->SR, _pimxrt_spi->CR, _pimxrt_spi->FSR,
// _pimxrt_spi->FCR, _spi_fcr_save, _pimxrt_spi->TCR);
writecommand_last(ILI9486_NOP);
endSPITransaction();
_dma_state &= ~ILI9486_DMA_ACTIVE;
_dmaActiveDisplay[_spi_num] = 0; // We don't have a display active any more...
} else {
// Lets try to flush out memory
if (_frame_complete_callback) (*_frame_complete_callback)();
else if ((uint32_t)_pfbtft >= 0x20200000u) arm_dcache_flush(_pfbtft, CBALLOC);
}
#ifdef DEBUG_ASYNC_LEDS
digitalWriteFast(DEBUG_PIN_3, LOW);
#endif
}
asm("dsb");
#elif defined(__MK64FX512__)
//
// T3.5...
_dmarx.clearInterrupt();
_dmatx.clearComplete();
_dmarx.clearComplete();
if (!_dma_count_remaining && !(_dma_state & ILI9486_DMA_CONT)) {
// The DMA transfers are done.
_dma_frame_count++;
#ifdef DEBUG_ASYNC_LEDS
digitalWriteFast(DEBUG_PIN_3, HIGH);
#endif
_pkinetisk_spi->RSER = 0;
//_pkinetisk_spi->MCR = SPI_MCR_MSTR | SPI_MCR_CLR_RXF | SPI_MCR_PCSIS(0x1F); // clear out the queue
_pkinetisk_spi->SR = 0xFF0F0000;
_pkinetisk_spi->CTAR0 &= ~(SPI_CTAR_FMSZ(8)); // Hack restore back to 8 bits
writecommand_last(ILI9486_NOP);
endSPITransaction();
_dma_state &= ~ILI9486_DMA_ACTIVE;
_dmaActiveDisplay = 0; // We don't have a display active any more...
_dma_sub_frame_count = 0;
if (_frame_complete_callback) (*_frame_complete_callback)();
#ifdef DEBUG_ASYNC_LEDS
digitalWriteFast(DEBUG_PIN_3, LOW);
#endif
} else {
uint16_t w;
if (_dma_count_remaining) { // Still part of one frome.
bool half_done = _dma_count_remaining == (CBALLOC/4);
_dma_count_remaining -= _dma_write_size_words;
w = *((uint16_t*)_dmatx.TCD->SADDR);
_dmatx.TCD->SADDR = (volatile uint8_t*)(_dmatx.TCD->SADDR) + 2;
if (_frame_complete_callback && _frame_callback_on_HalfDone && half_done) {
_dma_sub_frame_count = 1;
(*_frame_complete_callback)();
}
} else { // start a new frame
_dma_frame_count++;
_dmatx.sourceBuffer(&_pfbtft[1], (_dma_write_size_words-1)*2);
_dmatx.TCD->SLAST = 0; // Finish with it pointing to next location
w = _pfbtft[0];
_dma_count_remaining = CBALLOC/2 - _dma_write_size_words; // how much more to transfer?
_dma_sub_frame_count = 0;
if (_frame_complete_callback) (*_frame_complete_callback)();
}
#ifdef DEBUG_ASYNC_UPDATE
// dumpDMA_TCD(&_dmatx);
// dumpDMA_TCD(&_dmarx);
#endif
_pkinetisk_spi->PUSHR = (w | SPI_PUSHR_CTAS(0) | SPI_PUSHR_CONT);
_dmarx.enable();
_dmatx.enable();
}
#endif
#ifdef DEBUG_ASYNC_LEDS
digitalWriteFast(DEBUG_PIN_2, LOW);
#endif
}
#endif
// Teensy 3.1 can only generate 30 MHz SPI when running at 120 MHz (overclock)
#define WIDTH ILI9486_TFTWIDTH
#define HEIGHT ILI9486_TFTHEIGHT
// Constructor when using hardware ILI9241_KINETISK__pspi-> Faster, but must use SPI pins
// specific to each board type (e.g. 11,13 for Uno, 51,52 for Mega, etc.)
ILI9486_t3n::ILI9486_t3n(uint8_t cs, uint8_t dc, uint8_t rst,
uint8_t mosi, uint8_t sclk, uint8_t miso)
{
_cs = cs;
_dc = dc;
_rst = rst;
_mosi = mosi;
_sclk = sclk;
_miso = miso;
_width = WIDTH;
_height = HEIGHT;
rotation = 0;
cursor_y = cursor_x = 0;
textsize_x = textsize_y = 1;
textcolor = textbgcolor = 0xFFFF;
wrap = true;
font = NULL;
gfxFont = NULL;
setClipRect();
setOrigin();
// Added to see how much impact actually using non hardware CS pin might be
_cspinmask = 0;
_csport = NULL;
#ifdef ENABLE_ILI9486_FRAMEBUFFER
_pfbtft = NULL;
_use_fbtft = 0; // Are we in frame buffer mode?
_we_allocated_buffer = NULL;
#endif
}
//=======================================================================
// Add optinal support for using frame buffer to speed up complex outputs
//=======================================================================
void ILI9486_t3n::setFrameBuffer(uint16_t *frame_buffer)
{
#ifdef ENABLE_ILI9486_FRAMEBUFFER
_pfbtft = frame_buffer;
/* // Maybe you don't want the memory cleared as you may be playing games wiht multiple buffers.
if (_pfbtft != NULL) {
memset(_pfbtft, 0, ILI9486_TFTHEIGHT*ILI9486_TFTWIDTH*2);
}
*/
_dma_state &= ~ILI9486_DMA_INIT; // clear that we init the dma chain as our buffer has changed...
#endif
}
#ifdef ENABLE_ILI9486_FRAMEBUFFER
void ILI9486_t3n::setFrameCompleteCB(void (*pcb)(), bool fCallAlsoHalfDone)
{
_frame_complete_callback = pcb;
_frame_callback_on_HalfDone = pcb ? fCallAlsoHalfDone : false;
noInterrupts();
_dma_state &= ~ILI9486_DMA_INIT; // Lets setup the call backs on next call out
interrupts();
}
#endif
uint8_t ILI9486_t3n::useFrameBuffer(boolean b) // use the frame buffer? First call will allocate
{
#ifdef ENABLE_ILI9486_FRAMEBUFFER
if (b) {
// First see if we need to allocate buffer
if (_pfbtft == NULL) {
// Hack to start frame buffer on 32 byte boundary
_we_allocated_buffer = (uint16_t *)malloc(CBALLOC+32);
if (_we_allocated_buffer == NULL)
return 0; // failed
_pfbtft = (uint16_t*) (((uintptr_t)_we_allocated_buffer + 32) & ~ ((uintptr_t) (31)));
memset(_pfbtft, 0, CBALLOC);
}
_use_fbtft = 1;
clearChangedRange(); // make sure the dirty range is updated.
} else
_use_fbtft = 0;
return _use_fbtft;
#else
return 0;
#endif
}
void ILI9486_t3n::freeFrameBuffer(void) // explicit call to release the buffer
{
#ifdef ENABLE_ILI9486_FRAMEBUFFER
if (_we_allocated_buffer) {
free(_we_allocated_buffer);
_pfbtft = NULL;
_use_fbtft = 0; // make sure the use is turned off
_we_allocated_buffer = NULL;
}
#endif
}
void ILI9486_t3n::updateScreen(void) // call to say update the screen now.
{
// Not sure if better here to check flag or check existence of buffer.
// Will go by buffer as maybe can do interesting things?
#ifdef ENABLE_ILI9486_FRAMEBUFFER
if (_use_fbtft) {
beginSPITransaction(_SPI_CLOCK);
if (_standard && !_updateChangedAreasOnly) {
// Doing full window.
setAddr(0, 0, _width-1, _height-1);
writecommand_cont(ILI9486_RAMWR);
// BUGBUG doing as one shot. Not sure if should or not or do like
// main code and break up into transactions...
uint16_t *pfbtft_end = &_pfbtft[(ILI9486_TFTWIDTH*ILI9486_TFTHEIGHT)-1]; // setup
uint16_t *pftbft = _pfbtft;
// Quick write out the data;
while (pftbft < pfbtft_end) {
writedata16_cont(*pftbft++);
}
writedata16_last(*pftbft);
} else {
// setup just to output the clip rectangle area anded with updated area if enabled
int16_t start_x = _displayclipx1;
int16_t start_y = _displayclipy1;
int16_t end_x = _displayclipx2 - 1;
int16_t end_y = _displayclipy2 - 1;
if (_updateChangedAreasOnly) {
// maybe update range of values to update...
if (_changed_min_x > start_x) start_x = _changed_min_x;
if (_changed_min_y > start_y) start_y = _changed_min_y;
if (_changed_max_x < end_x) end_x = _changed_max_x;
if (_changed_max_y < end_y) end_y = _changed_max_y;
}
// Only do if actual area to update
if ((start_x <= end_x) && (start_y <= end_y)) {
setAddr(start_x, start_y, end_x, end_y);
writecommand_cont(ILI9486_RAMWR);
// BUGBUG doing as one shot. Not sure if should or not or do like
// main code and break up into transactions...
uint16_t * pfbPixel_row = &_pfbtft[ start_y*_width + start_x];
for (uint16_t y = start_y; y <= end_y; y++) {
uint16_t * pfbPixel = pfbPixel_row;
for (uint16_t x = start_x; x < end_x; x++) {
writedata16_cont(*pfbPixel++);
}
if (y < (end_y))
writedata16_cont(*pfbPixel);
else
writedata16_last(*pfbPixel);
pfbPixel_row += _width; // setup for the next row.
}
}
}
endSPITransaction();
}
clearChangedRange(); // make sure the dirty range is updated.
#endif
}
#ifdef DEBUG_ASYNC_UPDATE
void dumpDMA_TCD(DMABaseClass *dmabc, const char *psz_title)
{
if (psz_title) Serial.print(psz_title);
Serial.printf("%x %x:", (uint32_t)dmabc, (uint32_t)dmabc->TCD);
Serial.printf("SA:%x SO:%d AT:%x NB:%x SL:%d DA:%x DO: %d CI:%x DL:%x CS:%x BI:%x\n", (uint32_t)dmabc->TCD->SADDR,
dmabc->TCD->SOFF, dmabc->TCD->ATTR, dmabc->TCD->NBYTES, dmabc->TCD->SLAST, (uint32_t)dmabc->TCD->DADDR,
dmabc->TCD->DOFF, dmabc->TCD->CITER, dmabc->TCD->DLASTSGA, dmabc->TCD->CSR, dmabc->TCD->BITER);
}
#endif
#ifdef ENABLE_ILI9486_FRAMEBUFFER
//==============================================
#ifdef ENABLE_ILI9486_FRAMEBUFFER
void ILI9486_t3n::initDMASettings(void)
{
// Serial.printf("initDMASettings called %d\n", _dma_state);
if (_dma_state) { // should test for init, but...
return; // we already init this.
}
//Serial.println("InitDMASettings");
uint8_t dmaTXevent = _spi_hardware->tx_dma_channel;
#if defined(__MK66FX1M0__)
// T3.6
// BUGBUG:: check for -1 as wont work on SPI2 on T3.5
// uint16_t *fbtft_start_dma_addr = _pfbtft;
//Serial.printf("CWW: %d %d %d\n", CBALLOC, SCREEN_DMA_NUM_SETTINGS, count_words_write);
// Now lets setup DMA access to this memory...
_dmasettings[0].sourceBuffer(&_pfbtft[1], (COUNT_WORDS_WRITE-1)*2);
_dmasettings[0].destination(_pkinetisk_spi->PUSHR);
// Hack to reset the destination to only output 2 bytes.
_dmasettings[0].TCD->ATTR_DST = 1;
_dmasettings[0].replaceSettingsOnCompletion(_dmasettings[1]);
_dmasettings[1].sourceBuffer(&_pfbtft[COUNT_WORDS_WRITE], COUNT_WORDS_WRITE*2);
_dmasettings[1].destination(_pkinetisk_spi->PUSHR);
_dmasettings[1].TCD->ATTR_DST = 1;
_dmasettings[1].replaceSettingsOnCompletion(_dmasettings[2]);
if (_frame_callback_on_HalfDone) _dmasettings[1].interruptAtHalf();
else _dmasettings[1].TCD->CSR &= ~DMA_TCD_CSR_INTHALF;
_dmasettings[2].sourceBuffer(&_pfbtft[COUNT_WORDS_WRITE*2], COUNT_WORDS_WRITE*2);
_dmasettings[2].destination(_pkinetisk_spi->PUSHR);
_dmasettings[2].TCD->ATTR_DST = 1;
_dmasettings[2].replaceSettingsOnCompletion(_dmasettings[3]);
// Sort of hack - but wrap around to output the first word again.
// This version wraps again but instead outputs whole first group, bypass 0...
_dmasettings[2].interruptAtCompletion(); // 2 is end of frame
_dmasettings[3].sourceBuffer(_pfbtft, COUNT_WORDS_WRITE*2);
_dmasettings[3].destination(_pkinetisk_spi->PUSHR);
_dmasettings[3].TCD->ATTR_DST = 1;
_dmasettings[3].replaceSettingsOnCompletion(_dmasettings[1]);
// Setup DMA main object
//Serial.println("Setup _dmatx");
_dmatx.begin(true);
_dmatx.triggerAtHardwareEvent(dmaTXevent);
_dmatx = _dmasettings[0];
_dmatx.attachInterrupt(dmaInterrupt);
#elif defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
// See if moving the frame buffer to other memory that is not cached helps out
// to remove tearing and the like...I know with 256 it will be either 256 or 248...
// 320*240/3 = 25600
_dmasettings[0].sourceBuffer(_pfbtft, (COUNT_WORDS_WRITE)*2);
_dmasettings[0].destination(_pimxrt_spi->TDR);
_dmasettings[0].TCD->ATTR_DST = 1;
_dmasettings[0].replaceSettingsOnCompletion(_dmasettings[1]);
_dmasettings[1].sourceBuffer(&_pfbtft[COUNT_WORDS_WRITE], COUNT_WORDS_WRITE*2);
_dmasettings[1].destination(_pimxrt_spi->TDR);
_dmasettings[1].TCD->ATTR_DST = 1;
_dmasettings[1].replaceSettingsOnCompletion(_dmasettings[2]);
if (_frame_callback_on_HalfDone) _dmasettings[1].interruptAtHalf();
else _dmasettings[1].TCD->CSR &= ~DMA_TCD_CSR_INTHALF;
_dmasettings[2].sourceBuffer(&_pfbtft[COUNT_WORDS_WRITE*2], COUNT_WORDS_WRITE*2);
_dmasettings[2].destination(_pimxrt_spi->TDR);
_dmasettings[2].TCD->ATTR_DST = 1;
_dmasettings[2].replaceSettingsOnCompletion(_dmasettings[0]);
_dmasettings[2].interruptAtCompletion();
// Setup DMA main object
//Serial.println("Setup _dmatx");
// Serial.println("DMA initDMASettings - before dmatx");
_dmatx.begin(true);
_dmatx.triggerAtHardwareEvent(dmaTXevent);
_dmatx = _dmasettings[0];
if (_spi_num == 0) _dmatx.attachInterrupt(dmaInterrupt);
else if (_spi_num == 1) _dmatx.attachInterrupt(dmaInterrupt1);
else _dmatx.attachInterrupt(dmaInterrupt2);
#elif defined(__MK64FX512__)
// T3.5
// Lets setup the write size. For SPI we can use up to 32767 so same size as we use on T3.6...
// But SPI1 and SPI2 max of 511. We will use 480 in that case as even divider...
_dmarx.disable();
_dmarx.source(_pkinetisk_spi->POPR);
_dmarx.TCD->ATTR_SRC = 1;
_dmarx.destination(_dma_dummy_rx);
_dmarx.disableOnCompletion();
_dmarx.triggerAtHardwareEvent( _spi_hardware->rx_dma_channel);
_dmarx.attachInterrupt(dmaInterrupt);
_dmarx.interruptAtCompletion();
// We may be using settings chain here so lets set it up.
// Now lets setup TX chain. Note if trigger TX is not set
// we need to have the RX do it for us.
_dmatx.disable();
_dmatx.destination(_pkinetisk_spi->PUSHR);
_dmatx.TCD->ATTR_DST = 1;
_dmatx.disableOnCompletion();
// SPI on T3.5 only SPI object can do full size...
if (_spi_num == 0) {
_dmatx.triggerAtHardwareEvent(dmaTXevent);
_dma_write_size_words = COUNT_WORDS_WRITE;
} else {
_dma_write_size_words = 480;
_dmatx.triggerAtTransfersOf(_dmarx);
}
//Serial.printf("Init DMA Settings: TX:%d size:%d\n", dmaTXevent, _dma_write_size_words);
#endif
_dma_state = ILI9486_DMA_INIT; // Should be first thing set!
// Serial.println("DMA initDMASettings - end");
}
#endif
void ILI9486_t3n::dumpDMASettings() {
#ifdef DEBUG_ASYNC_UPDATE
#if defined(__MK66FX1M0__)
// T3.6
Serial.printf("DMA dump TCDs %d\n", _dmatx.channel);
dumpDMA_TCD(&_dmatx,"TX: ");
dumpDMA_TCD(&_dmasettings[0], " 0: ");
dumpDMA_TCD(&_dmasettings[1], " 1: ");
dumpDMA_TCD(&_dmasettings[2], " 2: ");
dumpDMA_TCD(&_dmasettings[3], " 3: ");
#elif defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
// Serial.printf("DMA dump TCDs %d\n", _dmatx.channel);
dumpDMA_TCD(&_dmatx,"TX: ");
dumpDMA_TCD(&_dmasettings[0], " 0: ");
dumpDMA_TCD(&_dmasettings[1], " 1: ");
dumpDMA_TCD(&_dmasettings[2], " 2: ");
#elif defined(__MK64FX512__)
Serial.printf("DMA dump TX:%d RX:%d\n", _dmatx.channel, _dmarx.channel);
dumpDMA_TCD(&_dmatx);
dumpDMA_TCD(&_dmarx);
#endif
#endif
}
bool ILI9486_t3n::updateScreenAsync(bool update_cont) // call to say update the screen now.
{
// Not sure if better here to check flag or check existence of buffer.
// Will go by buffer as maybe can do interesting things?
// BUGBUG:: only handles full screen so bail on the rest of it...
#ifdef ENABLE_ILI9486_FRAMEBUFFER
if (!_use_fbtft) return false;
#if defined(__MK64FX512__) // If T3.5 only allow on SPI...
// The T3.5 DMA to SPI has issues with preserving stuff like we want 16 bit mode
// and we want CS to stay on... So hack it. We will turn off using CS for the CS
// pin.
if (!_csport) {
pcs_data = 0;
pcs_command = pcs_data | _pspi->setCS(_dc);
pinMode(_cs, OUTPUT);
_csport = portOutputRegister(digitalPinToPort(_cs));
_cspinmask = digitalPinToBitMask(_cs);
*_csport |= _cspinmask;
}
#endif
#ifdef DEBUG_ASYNC_LEDS
digitalWriteFast(DEBUG_PIN_1, HIGH);
#endif
// Init DMA settings.
initDMASettings();
// Don't start one if already active.
if (_dma_state & ILI9486_DMA_ACTIVE) {
#ifdef DEBUG_ASYNC_LEDS
digitalWriteFast(DEBUG_PIN_1, LOW);
#endif
return false;
}
#if defined(__MK66FX1M0__)
//==========================================
// T3.6
//==========================================
if (update_cont) {
// Try to link in #3 into the chain
//_dmasettings[2].replaceSettingsOnCompletion(_dmasettings[3]);
//_dmasettings[2].TCD->CSR &= ~(DMA_TCD_CSR_INTMAJOR | DMA_TCD_CSR_DREQ); // Don't interrupt on this one...
_dmasettings[2].TCD->CSR &= ~(DMA_TCD_CSR_DREQ); // Don't disable on this one
_dma_state |= ILI9486_DMA_CONT;
} else {
// In this case we will only run through once...
//_dmasettings[2].replaceSettingsOnCompletion(_dmasettings[0]);
_dmasettings[2].interruptAtCompletion();
_dmasettings[2].disableOnCompletion();
_dma_state &= ~ILI9486_DMA_CONT;
}
#ifdef DEBUG_ASYNC_UPDATE
dumpDMASettings();
#endif
beginSPITransaction(_SPI_CLOCK);
// Doing full window.
setAddr(0, 0, _width-1, _height-1);
writecommand_cont(ILI9486_RAMWR);
// Write the first Word out before enter DMA as to setup the proper CS/DC/Continue flaugs
writedata16_cont(*_pfbtft);
// now lets start up the DMA
// volatile uint16_t biter = _dmatx.TCD->BITER;
//DMA_CDNE_CDNE(_dmatx.channel);
_dmatx = _dmasettings[0];
// _dmatx.TCD->BITER = biter;
_dma_frame_count = 0; // Set frame count back to zero.
_dmaActiveDisplay = this;
_dma_state |= ILI9486_DMA_ACTIVE;
_pkinetisk_spi->RSER |= SPI_RSER_TFFF_DIRS | SPI_RSER_TFFF_RE; // Set DMA Interrupt Request Select and Enable register
_pkinetisk_spi->MCR &= ~SPI_MCR_HALT; //Start transfers.
_dmatx.enable();
//==========================================
// T4
//==========================================
#elif defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
/////////////////////////////
// BUGBUG try first not worry about continueous or not.
// Start off remove disable on completion from both...
// it will be the ISR that disables it...
if ((uint32_t)_pfbtft >= 0x20200000u) arm_dcache_flush(_pfbtft, CBALLOC);
_dmasettings[2].TCD->CSR &= ~( DMA_TCD_CSR_DREQ);
beginSPITransaction(_SPI_CLOCK);
// Doing full window.
setAddr(0, 0, _width-1, _height-1);
writecommand_last(ILI9486_RAMWR);
// Update TCR to 16 bit mode. and output the first entry.
_spi_fcr_save = _pimxrt_spi->FCR; // remember the FCR
_pimxrt_spi->FCR = 0; // clear water marks...
maybeUpdateTCR(_tcr_dc_not_assert | LPSPI_TCR_FRAMESZ(15) | LPSPI_TCR_RXMSK /*| LPSPI_TCR_CONT*/);
_pimxrt_spi->DER = LPSPI_DER_TDDE;
_pimxrt_spi->SR = 0x3f00; // clear out all of the other status...
//_dmatx.triggerAtHardwareEvent( _spi_hardware->tx_dma_channel );
_dmatx = _dmasettings[0];
_dmatx.begin(false);
_dmatx.enable();
_dma_frame_count = 0; // Set frame count back to zero.
_dmaActiveDisplay[_spi_num] = this;
if (update_cont) {
_dma_state |= ILI9486_DMA_CONT;
} else {
_dmasettings[2].disableOnCompletion();
_dma_state &= ~ILI9486_DMA_CONT;
}
_dma_state |= ILI9486_DMA_ACTIVE;
#ifdef DEBUG_ASYNC_UPDATE
dumpDMASettings();
#endif
#elif defined(__MK64FX512__)
//==========================================
// T3.5
//==========================================
// lets setup the initial pointers.
_dmatx.sourceBuffer(&_pfbtft[1], (_dma_write_size_words-1)*2);
_dmatx.TCD->SLAST = 0; // Finish with it pointing to next location
_dmarx.transferCount(_dma_write_size_words);
_dma_count_remaining = CBALLOC/2 - _dma_write_size_words; // how much more to transfer?
//Serial.printf("SPI1/2 - TC:%d TR:%d\n", _dma_write_size_words, _dma_count_remaining);
#ifdef DEBUG_ASYNC_UPDATE
dumpDMASettings();
#endif
beginSPITransaction(_SPI_CLOCK);
// Doing full window.
setAddr(0, 0, _width-1, _height-1);
writecommand_cont(ILI9486_RAMWR);
// Write the first Word out before enter DMA as to setup the proper CS/DC/Continue flaugs
// On T3.5 DMA only appears to work with CTAR 0 so hack it up...
_pkinetisk_spi->CTAR0 |= SPI_CTAR_FMSZ(8); // Hack convert from 8 bit to 16 bit...
_pkinetisk_spi->MCR = SPI_MCR_MSTR | SPI_MCR_CLR_RXF | SPI_MCR_PCSIS(0x1F);
_pkinetisk_spi->SR = 0xFF0F0000;
// Lets try to output the first byte to make sure that we are in 16 bit mode...
_pkinetisk_spi->PUSHR = *_pfbtft | SPI_PUSHR_CTAS(0) | SPI_PUSHR_CONT;
if (_spi_num == 0) {
// SPI - has both TX and RX so use it
_pkinetisk_spi->RSER = SPI_RSER_RFDF_RE | SPI_RSER_RFDF_DIRS | SPI_RSER_TFFF_RE | SPI_RSER_TFFF_DIRS;
_dmarx.enable();
_dmatx.enable();
} else {
_pkinetisk_spi->RSER = SPI_RSER_RFDF_RE | SPI_RSER_RFDF_DIRS ;
_dmatx.triggerAtTransfersOf(_dmarx);
_dmatx.enable();
_dmarx.enable();
}
_dma_frame_count = 0; // Set frame count back to zero.
_dmaActiveDisplay = this;
if (update_cont) {
_dma_state |= ILI9486_DMA_CONT;
} else {
_dma_state &= ~ILI9486_DMA_CONT;
}
_dma_state |= ILI9486_DMA_ACTIVE;
#endif
#ifdef DEBUG_ASYNC_LEDS
digitalWriteFast(DEBUG_PIN_1, LOW);
#endif
return true;
#else
return false; // no frame buffer so will never start...
#endif
}
void ILI9486_t3n::endUpdateAsync() {
// make sure it is on
#ifdef ENABLE_ILI9486_FRAMEBUFFER
if (_dma_state & ILI9486_DMA_CONT) {
_dma_state &= ~ILI9486_DMA_CONT; // Turn of the continueous mode
#if defined(__MK66FX1M0__) || defined(__IMXRT1062__)
_dmasettings[2].disableOnCompletion();
#endif
}
#endif
}
void ILI9486_t3n::waitUpdateAsyncComplete(void)
{
#ifdef ENABLE_ILI9486_FRAMEBUFFER
#ifdef DEBUG_ASYNC_LEDS
digitalWriteFast(DEBUG_PIN_3, HIGH);
#endif
while ((_dma_state & ILI9486_DMA_ACTIVE)) {
// asm volatile("wfi");
};
#ifdef DEBUG_ASYNC_LEDS
digitalWriteFast(DEBUG_PIN_3, LOW);
#endif
#endif
}
#endif
//=======================================================================
void ILI9486_t3n::setAddrWindow(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1)
{
beginSPITransaction(_SPI_CLOCK);
setAddr(x0, y0, x1, y1);
writecommand_last(ILI9486_RAMWR); // write to RAM
endSPITransaction();
}
void ILI9486_t3n::pushColor(uint16_t color)
{
beginSPITransaction(_SPI_CLOCK);
writedata16_last(color);
endSPITransaction();
}
void ILI9486_t3n::drawPixel(int16_t x, int16_t y, uint16_t color) {
x += _originx;
y += _originy;
if((x < _displayclipx1) ||(x >= _displayclipx2) || (y < _displayclipy1) || (y >= _displayclipy2)) return;
#ifdef ENABLE_ILI9486_FRAMEBUFFER
if (_use_fbtft) {
updateChangedRange(x, y); // update the range of the screen that has been changed;
_pfbtft[y*_width + x] = color;
} else
#endif
{
beginSPITransaction(_SPI_CLOCK);
setAddr(x, y, x, y);
writecommand_cont(ILI9486_RAMWR);
writedata16_last(color);
endSPITransaction();
}
}
void ILI9486_t3n::drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color)
{
x+=_originx;
y+=_originy;
// Rectangular clipping
if((x < _displayclipx1) || (x >= _displayclipx2) || (y >= _displayclipy2)) return;
if(y < _displayclipy1) { h = h - (_displayclipy1 - y); y = _displayclipy1;}
if((y+h-1) >= _displayclipy2) h = _displayclipy2-y;
if(h<1) return;
#ifdef ENABLE_ILI9486_FRAMEBUFFER
if (_use_fbtft) {
updateChangedRange(x, y, 1, h); // update the range of the screen that has been changed;
uint16_t * pfbPixel = &_pfbtft[ y*_width + x];
while (h--) {
*pfbPixel = color;
pfbPixel += _width;
}
} else
#endif
{
beginSPITransaction(_SPI_CLOCK);
setAddr(x, y, x, y+h-1);
writecommand_cont(ILI9486_RAMWR);
while (h-- > 1) {
writedata16_cont(color);
}
writedata16_last(color);
endSPITransaction();
}
}
void ILI9486_t3n::drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color)
{
x+=_originx;
y+=_originy;
// Rectangular clipping
if((y < _displayclipy1) || (x >= _displayclipx2) || (y >= _displayclipy2)) return;
if(x<_displayclipx1) { w = w - (_displayclipx1 - x); x = _displayclipx1; }
if((x+w-1) >= _displayclipx2) w = _displayclipx2-x;
if (w<1) return;
#ifdef ENABLE_ILI9486_FRAMEBUFFER
if (_use_fbtft) {
updateChangedRange(x, y, w, 1); // update the range of the screen that has been changed;
if ((x&1) || (w&1)) {
uint16_t * pfbPixel = &_pfbtft[ y*_width + x];
while (w--) {
*pfbPixel++ = color;
}
} else {
// X is even and so is w, try 32 bit writes..
uint32_t color32 = (color << 16) | color;
uint32_t * pfbPixel = (uint32_t*)((uint16_t*)&_pfbtft[ y*_width + x]);
while (w) {
*pfbPixel++ = color32;
w -= 2;
}
}
} else
#endif
{
beginSPITransaction(_SPI_CLOCK);
setAddr(x, y, x+w-1, y);
writecommand_cont(ILI9486_RAMWR);
while (w-- > 1) {
writedata16_cont(color);
}
writedata16_last(color);
endSPITransaction();
}
}
void ILI9486_t3n::fillScreen(uint16_t color)
{
#ifdef ENABLE_ILI9486_FRAMEBUFFER
if (_use_fbtft && _standard) {
// Speed up lifted from Franks DMA code... _standard is if no offsets and rects..
updateChangedRange(0, 0, _width, _height); // update the range of the screen that has been changed;
uint32_t color32 = (color << 16) | color;
uint32_t *pfbPixel = (uint32_t *)_pfbtft;
uint32_t *pfbtft_end = (uint32_t *)((uint16_t *)&_pfbtft[(ILI9486_TFTWIDTH * ILI9486_TFTHEIGHT)]); // setup
while (pfbPixel < pfbtft_end) {
*pfbPixel++ = color32; *pfbPixel++ = color32; *pfbPixel++ = color32;*pfbPixel++ = color32;
*pfbPixel++ = color32; *pfbPixel++ = color32; *pfbPixel++ = color32;*pfbPixel++ = color32;
*pfbPixel++ = color32; *pfbPixel++ = color32; *pfbPixel++ = color32;*pfbPixel++ = color32;
*pfbPixel++ = color32; *pfbPixel++ = color32; *pfbPixel++ = color32;*pfbPixel++ = color32;
*pfbPixel++ = color32; *pfbPixel++ = color32; *pfbPixel++ = color32;*pfbPixel++ = color32;
*pfbPixel++ = color32; *pfbPixel++ = color32; *pfbPixel++ = color32;*pfbPixel++ = color32;
*pfbPixel++ = color32; *pfbPixel++ = color32; *pfbPixel++ = color32;*pfbPixel++ = color32;
*pfbPixel++ = color32; *pfbPixel++ = color32; *pfbPixel++ = color32;*pfbPixel++ = color32;
}
} else
#endif
{
fillRect(0, 0, _width, _height, color);
}
}
// fill a rectangle
void ILI9486_t3n::fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color)
{
x+=_originx;
y+=_originy;
// Rectangular clipping (drawChar w/big text requires this)
if((x >= _displayclipx2) || (y >= _displayclipy2)) return;
if (((x+w) <= _displayclipx1) || ((y+h) <= _displayclipy1)) return;
if(x < _displayclipx1) { w -= (_displayclipx1-x); x = _displayclipx1; }
if(y < _displayclipy1) { h -= (_displayclipy1 - y); y = _displayclipy1; }
if((x + w - 1) >= _displayclipx2) w = _displayclipx2 - x;
if((y + h - 1) >= _displayclipy2) h = _displayclipy2 - y;
#ifdef ENABLE_ILI9486_FRAMEBUFFER
if (_use_fbtft) {
updateChangedRange(x, y, w, h); // update the range of the screen that has been changed;
if ((x&1) || (w&1)) {
uint16_t * pfbPixel_row = &_pfbtft[ y*_width + x];
for (;h>0; h--) {
uint16_t * pfbPixel = pfbPixel_row;
for (int i = 0 ;i < w; i++) {
*pfbPixel++ = color;
}
pfbPixel_row += _width;
}
} else {
// Horizontal is even number so try 32 bit writes instead
uint32_t color32 = (color << 16) | color;
uint32_t * pfbPixel_row = (uint32_t *)((uint16_t*)&_pfbtft[ y*_width + x]);
w = w/2; // only iterate half the times
for (;h>0; h--) {
uint32_t * pfbPixel = pfbPixel_row;
for (int i = 0 ;i < w; i++) {
*pfbPixel++ = color32;
}
pfbPixel_row += (_width/2);
}
}
} else
#endif
{
// TODO: this can result in a very long transaction time
// should break this into multiple transactions, even though
// it'll cost more overhead, so we don't stall other SPI libs
beginSPITransaction(_SPI_CLOCK);
setAddr(x, y, x+w-1, y+h-1);
writecommand_cont(ILI9486_RAMWR);
for(y=h; y>0; y--) {
for(x=w; x>1; x--) {
writedata16_cont(color);
}
writedata16_last(color);
#if 0
if (y > 1 && (y & 1)) {
endSPITransaction();
beginSPITransaction(_SPI_CLOCK);
}
#endif
}
endSPITransaction();
}
}
// fillRectVGradient - fills area with vertical gradient
void ILI9486_t3n::fillRectVGradient(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color1, uint16_t color2)
{
x+=_originx;
y+=_originy;