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teensy_gfx.hpp
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teensy_gfx.hpp
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//***************************************************
// https://github.com/kurte/teensy_gfx
// http://forum.pjrc.com/threads/26305-Highly-optimized-ILI9341-(320x240-TFT-color-display)-library
//
// Warning this is Kurt's updated version which allows it to work on different SPI busses.
//
// On Teensy 3.x allows you to use on only one valid hardware CS pin which must
// be used for DC
//
// On Teensy 4.x including Micromod you are free to use any digital pin for
// CS and DC, but you might get a modest speed increase if hardware CS is
// used for the DC pin
//
/***************************************************
This is our library for the Adafruit ILI9341 Breakout and Shield
----> http://www.adafruit.com/products/1651
Check out the links above for our tutorials and wiring diagrams
These displays use SPI to communicate, 4 or 5 pins are required to
interface (RST is optional)
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
MIT license, all text above must be included in any redistribution
****************************************************/
// <SoftEgg>
// Additional graphics routines by Tim Trzepacz, SoftEgg LLC added December 2015
//(And then accidentally deleted and rewritten March 2016. Oops!)
// Gradient support
//----------------
// fillRectVGradient - fills area with vertical gradient
// fillRectHGradient - fills area with horizontal gradient
// fillScreenVGradient - fills screen with vertical gradient
// fillScreenHGradient - fills screen with horizontal gradient
// Additional Color Support
//------------------------
// color565toRGB - converts 565 format 16 bit color to
// RGB
// color565toRGB14 - converts 16 bit 565 format color to
// 14 bit RGB (2 bits clear for math and sign)
// RGB14tocolor565 - converts 14 bit RGB back to 16 bit
// 565 format color
// Low Memory Bitmap Support
//-------------------------
// writeRect8BPP - write 8 bit per pixel paletted bitmap
// writeRect4BPP - write 4 bit per pixel paletted bitmap
// writeRect2BPP - write 2 bit per pixel paletted bitmap
// writeRect1BPP - write 1 bit per pixel paletted bitmap
// String Pixel Length support
//---------------------------
// strPixelLen - gets pixel length of given ASCII
// string
// <\SoftEgg>
// Also some of this comes from the DMA version of the library...
/* ILI9341_t3DMA library code is placed under the MIT license
* Copyright (c) 2016 Frank Bösing
*
*/
#ifndef _ILI9341_t3NH_
#define _ILI9341_t3NH_
#define DISABLE_ILI9341_FRAMEBUFFER
#ifdef _SPIN_H_INCLUDED
#warning "Spin library is no longer required"
#endif
#define _SPIN_H_INCLUDED // try to avoid spin library from loading.
#define ILI9341_USE_DMAMEM
// Allow us to enable or disable capabilities, particully Frame Buffer and
// Clipping for speed and size
#ifndef DISABLE_ILI9341_FRAMEBUFFER
#if defined(__MK66FX1M0__) // T3.6
#define ENABLE_ILI9341_FRAMEBUFFER
#define SCREEN_DMA_NUM_SETTINGS \
3 // see if making it a constant value makes difference...
#elif defined(__MK64FX512__) // T3.5
#define ENABLE_ILI9341_FRAMEBUFFER
#define SCREEN_DMA_NUM_SETTINGS \
4 // see if making it a constant value makes difference...
#elif defined(__IMXRT1052__) || defined(__IMXRT1062__)
#define ENABLE_ILI9341_FRAMEBUFFER
#define SCREEN_DMA_NUM_SETTINGS \
3 // see if making it a constant value makes difference...
#endif
#endif
// Allow way to override using SPI
#ifdef __cplusplus
#include <DMAChannel.h>
#include <SPI.h>
#include <gfx_pixel.hpp>
#include <gfx_positioning.hpp>
#include "Arduino.h"
#endif
#include <stdint.h>
#include "ILI9341_fonts.h"
template <uint8_t SpiHost = 0>
struct teensy_tft_spi_driver {
static SPIClass *_pspi;
static SPIClass::SPI_Hardware_t *_spi_hardware;
constexpr static const uint8_t _spi_num = SpiHost; // Which buss is this spi on?
#if defined(KINETISK)
static KINETISK_SPI_t *_pkinetisk_spi;
#elif defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
static IMXRT_LPSPI_t *_pimxrt_spi;
#elif defined(KINETISL)
static KINETISL_SPI_t *_pkinetisl_spi;
#endif
static bool _initialized;
static uint8_t _rst;
static uint8_t _cs, _dc;
static uint8_t pcs_data, pcs_command;
static uint8_t _miso, _mosi, _sclk;
inline static bool initialized() { return _initialized; }
static bool initialize(uint8_t pin_cs, uint8_t pin_dc, uint8_t pin_rst = 0xFF) {
if (_initialized) {
return true;
}
_cs = pin_cs;
_dc = pin_dc;
_rst = pin_rst;
switch (_spi_num) {
case 0:
_pspi = &SPI;
#ifdef KINETISK
_pkinetisk_spi = &KINETISK_SPI0; // Could hack our way to grab this from SPI
// object, but...
_fifo_full_test = (3 << 12);
#elif defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
_pimxrt_spi = &IMXRT_LPSPI4_S; // Could hack our way to grab this from SPI
// object, but...
#else
_pkinetisl_spi = &KINETISL_SPI0;
#endif
break;
#if defined(__MK64FX512__) || defined(__MK66FX1M0__) || \
defined(__IMXRT1062__) || defined(__MKL26Z64__)
case 1:
_pspi = &SPI1;
#ifdef KINETISK
_pkinetisk_spi = &KINETISK_SPI1; // Could hack our way to grab this from SPI
// object, but...
_fifo_full_test = (0 << 12);
#elif defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
_pimxrt_spi = &IMXRT_LPSPI3_S; // Could hack our way to grab this from SPI
// object, but...
#else
_pkinetisl_spi = &KINETISL_SPI1;
#endif
break;
#if !defined(__MKL26Z64__)
case 2:
_pspi = &SPI2;
#ifdef KINETISK
_pkinetisk_spi = &KINETISK_SPI2; // Could hack our way to grab this from SPI
// object, but...
_fifo_full_test = (0 << 12);
#elif defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
_pimxrt_spi = &IMXRT_LPSPI1_S; // Could hack our way to grab this from SPI
// object, but...
#endif
break;
#endif
#endif
default:
return false;
}
// Hack to get hold of the SPI Hardware information...
uint32_t *pa = (uint32_t *)((void *)_pspi);
_spi_hardware = (SPIClass::SPI_Hardware_t *)(void *)pa[1];
_pspi->begin();
#ifdef KINETISK
if (_pspi->pinIsChipSelect(_cs, _dc)) {
pcs_data = _pspi->setCS(_cs);
pcs_command = pcs_data | _pspi->setCS(_dc);
} else {
// See if at least DC is on chipselect pin, if so try to limp along...
if (_pspi->pinIsChipSelect(_dc)) {
pcs_data = 0;
pcs_command = pcs_data | _pspi->setCS(_dc);
pinMode(_cs, OUTPUT);
_csport = portOutputRegister(digitalPinToPort(_cs));
_cspinmask = digitalPinToBitMask(_cs);
*_csport |= _cspinmask;
} else {
pcs_data = 0;
pcs_command = 0;
Serial.println("teensy_gfx: Error not DC is not valid hardware CS pin");
return gfx::gfx_result::invalid_argument;
}
}
#elif defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
// Serial.println(" T4 setup CS/DC"); Serial.flush();
pending_rx_count = 0; // Make sure it is zero if we we do a second begin...
_csport = portOutputRegister(_cs);
_cspinmask = digitalPinToBitMask(_cs);
pinMode(_cs, OUTPUT);
DIRECT_WRITE_HIGH(_csport, _cspinmask);
_spi_tcr_current = _pimxrt_spi->TCR; // get the current TCR value
// TODO: Need to setup DC to actually work.
if (_pspi->pinIsChipSelect(_dc)) {
uint8_t dc_cs_index = _pspi->setCS(_dc);
// Serial.printf(" T4 hardware DC: %x\n", dc_cs_index);
_dcport = 0;
_dcpinmask = 0;
// will depend on which PCS but first get this to work...
dc_cs_index--; // convert to 0 based
_tcr_dc_assert = LPSPI_TCR_PCS(dc_cs_index);
_tcr_dc_not_assert = LPSPI_TCR_PCS(3);
} else {
// Serial.println("teensy_gfx: DC is not valid hardware CS pin");
_dcport = portOutputRegister(_dc);
_dcpinmask = digitalPinToBitMask(_dc);
pinMode(_dc, OUTPUT);
DIRECT_WRITE_HIGH(_dcport, _dcpinmask);
_tcr_dc_assert = LPSPI_TCR_PCS(0);
_tcr_dc_not_assert = LPSPI_TCR_PCS(1);
}
maybeUpdateTCR(_tcr_dc_not_assert | LPSPI_TCR_FRAMESZ(7));
#else
// TLC
pcs_data = 0;
pcs_command = 0;
pinMode(_cs, OUTPUT);
_csport = portOutputRegister(digitalPinToPort(_cs));
_cspinmask = digitalPinToBitMask(_cs);
*_csport |= _cspinmask;
pinMode(_dc, OUTPUT);
_dcport = portOutputRegister(digitalPinToPort(_dc));
_dcpinmask = digitalPinToBitMask(_dc);
*_dcport |= _dcpinmask;
_dcpinAsserted = 0;
#endif
// toggle RST low to reset
if (_rst < 255) {
pinMode(_rst, OUTPUT);
digitalWrite(_rst, HIGH);
delay(5);
digitalWrite(_rst, LOW);
delay(20);
digitalWrite(_rst, HIGH);
delay(150);
}
_initialized = true;
return true;
}
///////////////////////////////
// BUGBUG:: reorganize this area better!
#if defined(KINETISK)
// inline uint8_t sizeFIFO() {return _fifo_size; }
static uint32_t _fifo_full_test;
static void waitFifoNotFull(void) {
uint32_t sr;
uint32_t tmp __attribute__((unused));
do {
sr = _pkinetisk_spi->SR;
if (sr & 0xF0)
tmp = _pkinetisk_spi->POPR; // drain RX FIFO
} while ((uint32_t)(sr & (15 << 12)) > _fifo_full_test);
}
static void waitFifoEmpty(void) {
uint32_t sr;
uint32_t tmp __attribute__((unused));
do {
sr = _pkinetisk_spi->SR;
if (sr & 0xF0)
tmp = _pkinetisk_spi->POPR; // drain RX FIFO
} while ((sr & 0xF0F0) > 0); // wait both RX & TX empty
}
static void waitTransmitComplete(void) {
uint32_t tmp __attribute__((unused));
while (!(_pkinetisk_spi->SR & SPI_SR_TCF))
; // wait until final output done
tmp = _pkinetisk_spi->POPR; // drain the final RX FIFO word
}
static void waitTransmitComplete(uint32_t mcr) {
uint32_t tmp __attribute__((unused));
while (1) {
uint32_t sr = _pkinetisk_spi->SR;
if (sr & SPI_SR_EOQF)
break; // wait for last transmit
if (sr & 0xF0)
tmp = _pkinetisk_spi->POPR;
}
_pkinetisk_spi->SR = SPI_SR_EOQF;
_pkinetisk_spi->MCR = mcr;
while (_pkinetisk_spi->SR & 0xF0) {
tmp = _pkinetisk_spi->POPR;
}
}
#elif defined(__IMXRT1052__) || defined(__IMXRT1062__)
static uint8_t pending_rx_count; // hack ...
static void waitFifoNotFull(void) {
uint32_t tmp __attribute__((unused));
do {
if ((_pimxrt_spi->RSR & LPSPI_RSR_RXEMPTY) == 0) {
tmp = _pimxrt_spi->RDR; // Read any pending RX bytes in
if (pending_rx_count)
pending_rx_count--; // decrement count of bytes still levt
}
} while ((_pimxrt_spi->SR & LPSPI_SR_TDF) == 0);
}
static void waitFifoEmpty(void) {
uint32_t tmp __attribute__((unused));
do {
if ((_pimxrt_spi->RSR & LPSPI_RSR_RXEMPTY) == 0) {
tmp = _pimxrt_spi->RDR; // Read any pending RX bytes in
if (pending_rx_count)
pending_rx_count--; // decrement count of bytes still levt
}
} while ((_pimxrt_spi->SR & LPSPI_SR_TCF) == 0);
}
static void waitTransmitComplete(void) {
uint32_t tmp __attribute__((unused));
// digitalWriteFast(2, HIGH);
while (pending_rx_count) {
if ((_pimxrt_spi->RSR & LPSPI_RSR_RXEMPTY) == 0) {
tmp = _pimxrt_spi->RDR; // Read any pending RX bytes in
pending_rx_count--; // decrement count of bytes still levt
}
}
_pimxrt_spi->CR = LPSPI_CR_MEN | LPSPI_CR_RRF; // Clear RX FIFO
}
static uint16_t waitTransmitCompleteReturnLast() {
uint32_t val = 0;
// digitalWriteFast(2, HIGH);
while (pending_rx_count) {
if ((_pimxrt_spi->RSR & LPSPI_RSR_RXEMPTY) == 0) {
val = _pimxrt_spi->RDR; // Read any pending RX bytes in
pending_rx_count--; // decrement count of bytes still levt
}
}
_pimxrt_spi->CR = LPSPI_CR_MEN | LPSPI_CR_RRF; // Clear RX FIFO
return val;
}
static void waitTransmitComplete(uint32_t mcr) {
// BUGBUG:: figure out if needed...
waitTransmitComplete();
}
#elif defined(KINETISL)
#endif
//////////////////////////////
// add support to allow only one hardware CS (used for dc)
#if defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
static uint32_t _cspinmask;
static volatile uint32_t *_csport;
static uint32_t _spi_tcr_current;
static uint32_t _dcpinmask;
static uint32_t _tcr_dc_assert;
static uint32_t _tcr_dc_not_assert;
static volatile uint32_t *_dcport;
#else
static uint8_t _cspinmask;
static volatile uint8_t *_csport;
#endif
#ifdef KINETISL
static uint8_t _dcpinAsserted;
static uint8_t _data_sent_not_completed;
static volatile uint8_t *_dcport;
static uint8_t _dcpinmask;
#endif
//. From Onewire utility files
#if defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
static void DIRECT_WRITE_LOW(volatile uint32_t *base, uint32_t mask)
__attribute__((always_inline)) {
*(base + 34) = mask;
}
static void DIRECT_WRITE_HIGH(volatile uint32_t *base, uint32_t mask)
__attribute__((always_inline)) {
*(base + 33) = mask;
}
#endif
static void beginSPITransaction(uint32_t clock) __attribute__((always_inline)) {
_pspi->beginTransaction(SPISettings(clock, MSBFIRST, SPI_MODE0));
#if defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
if (!_dcport)
_spi_tcr_current = _pimxrt_spi->TCR; // Only if DC is on hardware CS
#endif
if (_csport) {
#if defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
DIRECT_WRITE_LOW(_csport, _cspinmask);
#else
*_csport &= ~_cspinmask;
#endif
}
}
static void endSPITransaction() __attribute__((always_inline)) {
if (_csport) {
#if defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
DIRECT_WRITE_HIGH(_csport, _cspinmask);
#else
*_csport |= _cspinmask;
#endif
}
_pspi->endTransaction();
}
#if defined(KINETISK)
static void writecommand_cont(uint8_t c) __attribute__((always_inline)) {
_pkinetisk_spi->PUSHR =
c | (pcs_command << 16) | SPI_PUSHR_CTAS(0) | SPI_PUSHR_CONT;
waitFifoNotFull();
}
static void writedata8_cont(uint8_t c) __attribute__((always_inline)) {
_pkinetisk_spi->PUSHR =
c | (pcs_data << 16) | SPI_PUSHR_CTAS(0) | SPI_PUSHR_CONT;
waitFifoNotFull();
}
static void writedata16_cont(uint16_t d) __attribute__((always_inline)) {
_pkinetisk_spi->PUSHR =
d | (pcs_data << 16) | SPI_PUSHR_CTAS(1) | SPI_PUSHR_CONT;
waitFifoNotFull();
}
static void writecommand_last(uint8_t c) __attribute__((always_inline)) {
uint32_t mcr = _pkinetisk_spi->MCR;
_pkinetisk_spi->PUSHR =
c | (pcs_command << 16) | SPI_PUSHR_CTAS(0) | SPI_PUSHR_EOQ;
waitTransmitComplete(mcr);
}
static void writedata8_last(uint8_t c) __attribute__((always_inline)) {
uint32_t mcr = _pkinetisk_spi->MCR;
_pkinetisk_spi->PUSHR =
c | (pcs_data << 16) | SPI_PUSHR_CTAS(0) | SPI_PUSHR_EOQ;
waitTransmitComplete(mcr);
}
static void writedata16_last(uint16_t d) __attribute__((always_inline)) {
uint32_t mcr = _pkinetisk_spi->MCR;
_pkinetisk_spi->PUSHR =
d | (pcs_data << 16) | SPI_PUSHR_CTAS(1) | SPI_PUSHR_EOQ;
waitTransmitComplete(mcr);
}
#elif defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
constexpr static const uint32_t TCR_MASK =
(LPSPI_TCR_PCS(3) | LPSPI_TCR_FRAMESZ(31) | LPSPI_TCR_CONT | LPSPI_TCR_RXMSK);
static void maybeUpdateTCR(
uint32_t requested_tcr_state) /*__attribute__((always_inline)) */ {
if ((_spi_tcr_current & TCR_MASK) != requested_tcr_state) {
bool dc_state_change = (_spi_tcr_current & LPSPI_TCR_PCS(3)) !=
(requested_tcr_state & LPSPI_TCR_PCS(3));
_spi_tcr_current = (_spi_tcr_current & ~TCR_MASK) | requested_tcr_state;
// only output when Transfer queue is empty.
if (!dc_state_change || !_dcpinmask) {
while ((_pimxrt_spi->FSR & 0x1f))
;
_pimxrt_spi->TCR = _spi_tcr_current; // update the TCR
} else {
waitTransmitComplete();
if (requested_tcr_state & LPSPI_TCR_PCS(3))
DIRECT_WRITE_HIGH(_dcport, _dcpinmask);
else
DIRECT_WRITE_LOW(_dcport, _dcpinmask);
_pimxrt_spi->TCR = _spi_tcr_current &
~(LPSPI_TCR_PCS(3) |
LPSPI_TCR_CONT); // go ahead and update TCR anyway?
}
}
}
// BUGBUG:: currently assumming we only have CS_0 as valid CS
static void writecommand_cont(uint8_t c) __attribute__((always_inline)) {
maybeUpdateTCR(_tcr_dc_assert | LPSPI_TCR_FRAMESZ(7) /*| LPSPI_TCR_CONT*/);
_pimxrt_spi->TDR = c;
pending_rx_count++; //
waitFifoNotFull();
}
static void writedata8_cont(uint8_t c) __attribute__((always_inline)) {
maybeUpdateTCR(_tcr_dc_not_assert | LPSPI_TCR_FRAMESZ(7) | LPSPI_TCR_CONT);
_pimxrt_spi->TDR = c;
pending_rx_count++; //
waitFifoNotFull();
}
static void writedata16_cont(uint16_t d) __attribute__((always_inline)) {
maybeUpdateTCR(_tcr_dc_not_assert | LPSPI_TCR_FRAMESZ(15) | LPSPI_TCR_CONT);
_pimxrt_spi->TDR = d;
pending_rx_count++; //
waitFifoNotFull();
}
static void writecommand_last(uint8_t c) __attribute__((always_inline)) {
maybeUpdateTCR(_tcr_dc_assert | LPSPI_TCR_FRAMESZ(7));
_pimxrt_spi->TDR = c;
// _pimxrt_spi->SR = LPSPI_SR_WCF | LPSPI_SR_FCF | LPSPI_SR_TCF;
pending_rx_count++; //
waitTransmitComplete();
}
static void writedata8_last(uint8_t c) __attribute__((always_inline)) {
maybeUpdateTCR(_tcr_dc_not_assert | LPSPI_TCR_FRAMESZ(7));
_pimxrt_spi->TDR = c;
// _pimxrt_spi->SR = LPSPI_SR_WCF | LPSPI_SR_FCF | LPSPI_SR_TCF;
pending_rx_count++; //
waitTransmitComplete();
}
static void writedata16_last(uint16_t d) __attribute__((always_inline)) {
maybeUpdateTCR(_tcr_dc_not_assert | LPSPI_TCR_FRAMESZ(15));
_pimxrt_spi->TDR = d;
// _pimxrt_spi->SR = LPSPI_SR_WCF | LPSPI_SR_FCF | LPSPI_SR_TCF;
pending_rx_count++; //
waitTransmitComplete();
}
inline static void writeData(const uint8_t *data, size_t size) {
while (--size) {
writedata8_cont(*data++);
}
writedata8_last(*data);
}
inline static void writeData16(const uint16_t *data, size_t size) {
while (--size) {
writedata16_cont(*data++);
}
writedata16_last(*data);
}
inline static void writeDataRepeat(uint8_t data, size_t count) {
while (--count) {
writedata8_cont(data);
}
writedata8_last(data);
}
inline static void writeData16Repeat(uint16_t data, size_t count) {
while (--count) {
writedata16_cont(data);
}
writedata16_last(data);
}
// Now lets see if we can read in multiple pixels
#ifdef KINETISK
static void readData24to16(uint16_t *data, size_t size) {
i
uint8_t rgb[3]; // RGB bytes received from the display
uint8_t rgbIdx = 0;
uint32_t txCount = size + ((size + 1) / 2); // num bytes to transmit
uint32_t rxCount =
txCount; // number of bytes we will receive back from the display
// transmit a DUMMY byte before the color bytes
_pkinetisk_spi->PUSHR =
0 | (pcs_data << 16) | SPI_PUSHR_CTAS(0) | SPI_PUSHR_CONT;
// skip values returned by the queued up transfers and the current in-flight
// transfer
uint32_t sr = _pkinetisk_spi->SR;
uint8_t skipCount = ((sr >> 4) & 0xF) + ((sr >> 12) & 0xF) + 1;
while (txCount || rxCount) {
// transmit another byte if possible
if (txCount && (_pkinetisk_spi->SR & 0xF000) <= _fifo_full_test) {
txCount--;
if (txCount) {
_pkinetisk_spi->PUSHR = READ_PIXEL_PUSH_BYTE | (pcs_data << 16) |
SPI_PUSHR_CTAS(0) | SPI_PUSHR_CONT;
} else {
_pkinetisk_spi->PUSHR = READ_PIXEL_PUSH_BYTE | (pcs_data << 16) |
SPI_PUSHR_CTAS(0) | SPI_PUSHR_EOQ;
}
}
// receive another byte if possible, and either skip it or store the color
if (rxCount && (_pkinetisk_spi->SR & 0xF0)) {
rgb[rgbIdx] = _pkinetisk_spi->POPR;
if (skipCount) {
skipCount--;
} else {
rxCount--;
rgbIdx++;
if (rgbIdx == 3) {
rgbIdx = 0;
*data++ = ((rgb[0] & 0xF8) << 8) | ((rgb[1] & 0xFC) << 3) | (rgb[2] >> 3);
}
}
}
}
// wait for End of Queue
while ((_pkinetisk_spi->SR & SPI_SR_EOQF) == 0)
;
_pkinetisk_spi->SR = SPI_SR_EOQF; // make sure it is clear
}
#elif defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
static void readData24to16(uint16_t *data, size_t size) {
uint8_t rgb[3]; // RGB bytes received from the display
uint8_t rgbIdx = 0;
uint32_t txCount = size + ((size + 1) / 2); // num bytes to transmit
uint32_t rxCount =
txCount; // number of bytes we will receive back from the display
while (txCount || rxCount) {
// transmit another byte if possible
if (txCount && (_pimxrt_spi->SR & LPSPI_SR_TDF)) {
txCount--;
if (txCount) {
_pimxrt_spi->TDR = 0;
} else {
maybeUpdateTCR(_tcr_dc_not_assert |
LPSPI_TCR_FRAMESZ(7)); // remove the CONTINUE...
while ((_pimxrt_spi->SR & LPSPI_SR_TDF) == 0)
; // wait if queue was full
_pimxrt_spi->TDR = 0;
}
}
// receive another byte if possible, and either skip it or store the color
if (rxCount && !(_pimxrt_spi->RSR & LPSPI_RSR_RXEMPTY)) {
rgb[rgbIdx] = _pimxrt_spi->RDR;
rxCount--;
rgbIdx++;
if (rgbIdx == 3) {
rgbIdx = 0;
*data++ = ((rgb[0] & 0xF8) << 8) | ((rgb[1] & 0xFC) << 3) | (rgb[2] >> 3);
}
}
}
}
#else
// Teensy LC version
static void readData24to16(uint16_t *data, size_t size) {
uint8_t rgb[3]; // RGB bytes received from the display
uint8_t rgbIdx = 0;
uint32_t txCount = size + ((size + 1) / 2); // num bytes to transmit
uint32_t rxCount =
txCount; // number of bytes we will receive back from the display
// Wait until that one returns, Could do a little better and double buffer but
// this is easer for now.
waitTransmitComplete();
// Since double buffer setup lets try keeping read/write in sync
#define RRECT_TIMEOUT 0xffff
#undef READ_PIXEL_PUSH_BYTE
#define READ_PIXEL_PUSH_BYTE 0 // try with zero to see...
uint16_t timeout_countdown = RRECT_TIMEOUT;
uint16_t dl_in;
// Write out first byte:
while (!(_pkinetisl_spi->S & SPI_S_SPTEF))
; // Not worried that this can completely hang?
_pkinetisl_spi->DL = READ_PIXEL_PUSH_BYTE;
while (rxCount && timeout_countdown) {
// Now wait until we can output something
dl_in = 0xffff;
if (rxCount > 1) {
while (!(_pkinetisl_spi->S & SPI_S_SPTEF))
; // Not worried that this can completely hang?
if (_pkinetisl_spi->S & SPI_S_SPRF)
dl_in = _pkinetisl_spi->DL;
_pkinetisl_spi->DL = READ_PIXEL_PUSH_BYTE;
}
// Now wait until there is a byte available to receive
while ((dl_in != 0xffff) && !(_pkinetisl_spi->S & SPI_S_SPRF) &&
--timeout_countdown)
;
if (timeout_countdown) { // Make sure we did not get here because of timeout
rxCount--;
rgb[rgbIdx] = (dl_in != 0xffff) ? dl_in : _pkinetisl_spi->DL;
rgbIdx++;
if (rgbIdx == 3) {
rgbIdx = 0;
*data++ = ((rgb[0] & 0xF8) << 8) | ((rgb[1] & 0xFC) << 3) | (rgb[2] >> 3);
}
timeout_countdown = timeout_countdown;
}
}
// Debug code.
/* if (timeout_countdown == 0) {
Serial.print("RRect Timeout ");
Serial.println(rxCount, DEC);
} */
}
#endif
#elif defined(KINETISL)
// Lets see how hard to make it work OK with T-LC
static uint8_t _dcpinAsserted;
static uint8_t _data_sent_not_completed;
static void waitTransmitComplete() {
while (_data_sent_not_completed) {
uint16_t timeout_count = 0xff; // hopefully enough
while (!(_pkinetisl_spi->S & SPI_S_SPRF) && timeout_count--)
; // wait
uint8_t d __attribute__((unused));
d = _pkinetisl_spi->DL;
d = _pkinetisl_spi->DH;
_data_sent_not_completed--; // We hopefully received our data...
}
}
static uint16_t waitTransmitCompleteReturnLast() {
uint16_t d = 0;
while (_data_sent_not_completed) {
uint16_t timeout_count = 0xff; // hopefully enough
while (!(_pkinetisl_spi->S & SPI_S_SPRF) && timeout_count--)
; // wait
d = (_pkinetisl_spi->DH << 8) | _pkinetisl_spi->DL;
_data_sent_not_completed--; // We hopefully received our data...
}
return d;
}
static void setCommandMode() __attribute__((always_inline)) {
if (!_dcpinAsserted) {
waitTransmitComplete();
*_dcport &= ~_dcpinmask;
_dcpinAsserted = 1;
}
}
static void setDataMode() __attribute__((always_inline)) {
if (_dcpinAsserted) {
waitTransmitComplete();
*_dcport |= _dcpinmask;
_dcpinAsserted = 0;
}
}
static void outputToSPI(uint8_t c) {
if (_pkinetisl_spi->C2 & SPI_C2_SPIMODE) {
// Wait to change modes until any pending output has been done.
waitTransmitComplete();
_pkinetisl_spi->C2 = 0; // make sure 8 bit mode.
}
while (!(_pkinetisl_spi->S & SPI_S_SPTEF))
; // wait if output buffer busy.
// Clear out buffer if there is something there...
if ((_pkinetisl_spi->S & SPI_S_SPRF)) {
uint8_t d __attribute__((unused));
d = _pkinetisl_spi->DL;
_data_sent_not_completed--;
}
_pkinetisl_spi->DL = c; // output byte
_data_sent_not_completed++; // let system know we sent something
}
static void outputToSPI16(uint16_t data) {
if (!(_pkinetisl_spi->C2 & SPI_C2_SPIMODE)) {
// Wait to change modes until any pending output has been done.
waitTransmitComplete();
_pkinetisl_spi->C2 = SPI_C2_SPIMODE; // make sure 8 bit mode.
}
uint8_t s;
do {
s = _pkinetisl_spi->S;
// wait if output buffer busy.
// Clear out buffer if there is something there...
if ((s & SPI_S_SPRF)) {
uint8_t d __attribute__((unused));
d = _pkinetisl_spi->DL;
d = _pkinetisl_spi->DH;
_data_sent_not_completed--; // let system know we sent something
}
} while (!(s & SPI_S_SPTEF) || (s & SPI_S_SPRF));
_pkinetisl_spi->DL = data; // output low byte
_pkinetisl_spi->DH = data >> 8; // output high byte
_data_sent_not_completed++; // let system know we sent something
}
static void writecommand_cont(uint8_t c) {
setCommandMode();
outputToSPI(c);
}
static void writedata8_cont(uint8_t c) {
setDataMode();
outputToSPI(c);
}
static void writedata16_cont(uint16_t c) {
setDataMode();
outputToSPI16(c);
}
static void writecommand_last(uint8_t c) {
setCommandMode();
outputToSPI(c);
waitTransmitComplete();
}
static void writedata8_last(uint8_t c) {
setDataMode();
outputToSPI(c);
waitTransmitComplete();
}
static void writedata16_last(uint16_t c) {
setDataMode();
outputToSPI16(c);
waitTransmitComplete();
_pkinetisl_spi->C2 = 0; // Set back to 8 bit mode...
_pkinetisl_spi->S; // Read in the status;
}
#endif
};
#if defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
template <uint8_t SpiHost>
uint32_t teensy_tft_spi_driver<SpiHost>::_cspinmask = 0;
template <uint8_t SpiHost>
volatile uint32_t *teensy_tft_spi_driver<SpiHost>::_csport = nullptr;
template <uint8_t SpiHost>
uint32_t teensy_tft_spi_driver<SpiHost>::_spi_tcr_current = 0;
template <uint8_t SpiHost>
uint32_t teensy_tft_spi_driver<SpiHost>::_dcpinmask = 0;
template <uint8_t SpiHost>
uint32_t teensy_tft_spi_driver<SpiHost>::_tcr_dc_assert = 0;
template <uint8_t SpiHost>
uint32_t teensy_tft_spi_driver<SpiHost>::_tcr_dc_not_assert = 0;
template <uint8_t SpiHost>
volatile uint32_t *teensy_tft_spi_driver<SpiHost>::_dcport = nullptr;
#else
template <uint8_t SpiHost>
uint8_t teensy_tft_spi_driver<SpiHost>::_cspinmask = 0;
template <uint8_t SpiHost>
volatile uint8_t *teensy_tft_spi_driver<SpiHost>::_csport = nullptr;
#endif
#ifdef KINETISL
template <uint8_t SpiHost>
volatile uint8_t *teensy_tft_spi_driver<SpiHost>::_dcport = nullptr;
template <uint8_t SpiHost>
uint8_t teensy_tft_spi_driver<SpiHost>::_dcpinmask = 0;
// Lets see how hard to make it work OK with T-LC
template <uint8_t SpiHost>
uint8_t teensy_tft_spi_driver<SpiHost>::_dcpinAsserted = 0;
template <uint8_t SpiHost>
uint8_t teensy_tft_spi_driver<SpiHost>::_data_sent_not_completed = 0;
#endif
#if defined(KINETISK)
template <uint8_t SpiHost>
uint32_t teensy_tft_spi_driver<SpiHost>::_fifo_full_test;
template <uint8_t SpiHost>
KINETISK_SPI_t *teensy_tft_spi_driver<SpiHost>::_pkinetisk_spi = nullptr;
#elif defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
template <uint8_t SpiHost>
IMXRT_LPSPI_t *teensy_tft_spi_driver<SpiHost>::_pimxrt_spi = nullptr;
template <uint8_t SpiHost>
uint8_t teensy_tft_spi_driver<SpiHost>::pending_rx_count = 0; // hack ...
#elif defined(KINETISL)
template <uint8_t SpiHost>
KINETISL_SPI_t *teensy_tft_spi_driver<SpiHost>::_pkinetisl_spi = nullptr;
#endif
template <uint8_t SpiHost>
bool teensy_tft_spi_driver<SpiHost>::_initialized = false;
template <uint8_t SpiHost>
uint8_t teensy_tft_spi_driver<SpiHost>::_rst = 0xFF;
template <uint8_t SpiHost>
uint8_t teensy_tft_spi_driver<SpiHost>::_cs = 0xFF;
template <uint8_t SpiHost>
uint8_t teensy_tft_spi_driver<SpiHost>::_dc = 0xFF;
template <uint8_t SpiHost>
uint8_t teensy_tft_spi_driver<SpiHost>::pcs_data = 0;
template <uint8_t SpiHost>
uint8_t teensy_tft_spi_driver<SpiHost>::pcs_command = 0;
template <uint8_t SpiHost>
uint8_t teensy_tft_spi_driver<SpiHost>::_miso = 0xFF;
template <uint8_t SpiHost>
uint8_t teensy_tft_spi_driver<SpiHost>::_mosi = 0xFF;
template <uint8_t SpiHost>
uint8_t teensy_tft_spi_driver<SpiHost>::_sclk = 0xFF;
template <uint8_t SpiHost>
SPIClass* teensy_tft_spi_driver<SpiHost>::_pspi = nullptr;
template <uint8_t SpiHost>
SPIClass::SPI_Hardware_t* teensy_tft_spi_driver<SpiHost>::_spi_hardware = nullptr;
#define ILI9341_TFTWIDTH 240
#define ILI9341_TFTHEIGHT 320
#define ILI9341_NOP 0x00
#define ILI9341_SWRESET 0x01
#define ILI9341_RDDID 0x04
#define ILI9341_RDDST 0x09
#define ILI9341_SLPIN 0x10
#define ILI9341_SLPOUT 0x11
#define ILI9341_PTLON 0x12
#define ILI9341_NORON 0x13
#define ILI9341_RDMODE 0x0A
#define ILI9341_RDMADCTL 0x0B
#define ILI9341_RDPIXFMT 0x0C
#define ILI9341_RDIMGFMT 0x0D
#define ILI9341_RDSELFDIAG 0x0F
#define ILI9341_INVOFF 0x20
#define ILI9341_INVON 0x21
#define ILI9341_GAMMASET 0x26
#define ILI9341_DISPOFF 0x28
#define ILI9341_DISPON 0x29
#define ILI9341_CASET 0x2A
#define ILI9341_PASET 0x2B
#define ILI9341_RAMWR 0x2C
#define ILI9341_RAMRD 0x2E
#define ILI9341_PTLAR 0x30
#define ILI9341_VSCRDEF 0x33
#define ILI9341_MADCTL 0x36
#define ILI9341_VSCRSADD 0x37
#define ILI9341_PIXFMT 0x3A
#define ILI9341_FRMCTR1 0xB1
#define ILI9341_FRMCTR2 0xB2
#define ILI9341_FRMCTR3 0xB3
#define ILI9341_INVCTR 0xB4
#define ILI9341_DFUNCTR 0xB6
#define ILI9341_PWCTR1 0xC0
#define ILI9341_PWCTR2 0xC1
#define ILI9341_PWCTR3 0xC2
#define ILI9341_PWCTR4 0xC3
#define ILI9341_PWCTR5 0xC4
#define ILI9341_VMCTR1 0xC5
#define ILI9341_VMCTR2 0xC7
#define ILI9341_RDID1 0xDA
#define ILI9341_RDID2 0xDB
#define ILI9341_RDID3 0xDC
#define ILI9341_RDID4 0xDD
#define ILI9341_GMCTRP1 0xE0
#define ILI9341_GMCTRN1 0xE1
/*
#define ILI9341_PWCTR6 0xFC
*/
#define CL(_r, _g, _b) ((((_r)&0xF8) << 8) | (((_g)&0xFC) << 3) | ((_b) >> 3))
#define sint16_t int16_t
#ifdef __cplusplus
// At all other speeds, _pspi->beginTransaction() will use the fastest available
// clock
#ifdef KINETISK
#define ILI9341_SPICLOCK 30000000
#define ILI9341_SPICLOCK_READ 2000000
#elif defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
#define ILI9341_SPICLOCK 30000000u
#define ILI9341_SPICLOCK_READ 2000000
#else
#define ILI9341_SPICLOCK 30000000
#define ILI9341_SPICLOCK_READ 2000000
#endif
namespace helpers_ili9341 {
static const uint8_t PROGMEM init_commands[] = {4, 0xEF, 0x03, 0x80, 0x02,
4, 0xCF, 0x00, 0XC1, 0X30,
5, 0xED, 0x64, 0x03, 0X12, 0X81,
4, 0xE8, 0x85, 0x00, 0x78,
6, 0xCB, 0x39, 0x2C, 0x00, 0x34, 0x02,
2, 0xF7, 0x20,
3, 0xEA, 0x00, 0x00,
2, 0xC0, 0x23, // Power control
2, 0xC1, 0x10, // Power control
3, 0xC5, 0x3e, 0x28, // VCM control
2, 0xC7, 0x86, // VCM control2
2, 0x36, 0x48, // Memory Access Control
2, 0x3A, 0x55, // pixel format
3, 0xB1, 0x00, 0x18,
4, 0xB6, 0x08, 0x82, 0x27, // Display Function Control
2, 0xF2, 0x00, // Gamma Function Disable
2, 0x26, 0x01, // Gamma curve selected
16, 0xE0, 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E,
0xF1, 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00, // Set Gamma
16, 0xE1, 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31,
0xC1, 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F, // Set Gamma
3, 0xb1, 0x00, 0x10, // FrameRate Control 119Hz
0};
}
class teensy_gfx final {