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Weather_ESP/components/tft/tftspi.c

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/*
* Author: LoBo (loboris@gmail.com, loboris.github)
*
* Module supporting SPI TFT displays based on ILI9341 & ILI9488 controllers
*
* HIGH SPEED LOW LEVEL DISPLAY FUNCTIONS
* USING DIRECT or DMA SPI TRANSFER MODEs
*
*/
#include <string.h>
#include "tftspi.h"
#include "freertos/task.h"
#include "soc/spi_reg.h"
#include "driver/gpio.h"
// ====================================================
// ==== Global variables, default values ==============
// Converts colors to grayscale if set to 1
uint8_t tft_gray_scale = 0;
// Spi clock for reading data from display memory in Hz
uint32_t tft_max_rdclock = 8000000;
// Default display dimensions
int tft_width = DEFAULT_TFT_DISPLAY_WIDTH;
int tft_height = DEFAULT_TFT_DISPLAY_HEIGHT;
// Display type, DISP_TYPE_ILI9488 or DISP_TYPE_ILI9341
uint8_t tft_disp_type = DEFAULT_DISP_TYPE;
// Spi device handles for display and touch screen
spi_lobo_device_handle_t tft_disp_spi = NULL;
spi_lobo_device_handle_t tft_ts_spi = NULL;
// ====================================================
static color_t *trans_cline = NULL;
static uint8_t _dma_sending = 0;
// RGB to GRAYSCALE constants
// 0.2989 0.5870 0.1140
#define GS_FACT_R 0.2989
#define GS_FACT_G 0.4870
#define GS_FACT_B 0.2140
// ==== Functions =====================
//------------------------------------------------------
esp_err_t IRAM_ATTR wait_trans_finish(uint8_t free_line)
{
// Wait for SPI bus ready
while (tft_disp_spi->host->hw->cmd.usr);
if ((free_line) && (trans_cline)) {
free(trans_cline);
trans_cline = NULL;
}
if (_dma_sending) {
//Tell common code DMA workaround that our DMA channel is idle. If needed, the code will do a DMA reset.
if (tft_disp_spi->host->dma_chan) spi_lobo_dmaworkaround_idle(tft_disp_spi->host->dma_chan);
// Reset DMA
tft_disp_spi->host->hw->dma_conf.val |= SPI_OUT_RST|SPI_IN_RST|SPI_AHBM_RST|SPI_AHBM_FIFO_RST;
tft_disp_spi->host->hw->dma_out_link.start=0;
tft_disp_spi->host->hw->dma_in_link.start=0;
tft_disp_spi->host->hw->dma_conf.val &= ~(SPI_OUT_RST|SPI_IN_RST|SPI_AHBM_RST|SPI_AHBM_FIFO_RST);
tft_disp_spi->host->hw->dma_conf.out_data_burst_en=1;
_dma_sending = 0;
}
return ESP_OK;
}
//-------------------------------
esp_err_t IRAM_ATTR disp_select()
{
wait_trans_finish(1);
return spi_lobo_device_select(tft_disp_spi, 0);
}
//---------------------------------
esp_err_t IRAM_ATTR disp_deselect()
{
wait_trans_finish(1);
return spi_lobo_device_deselect(tft_disp_spi);
}
//---------------------------------------------------------------------------------------------------
static void IRAM_ATTR _spi_transfer_start(spi_lobo_device_handle_t spi_dev, int wrbits, int rdbits) {
// Load send buffer
spi_dev->host->hw->user.usr_mosi_highpart = 0;
spi_dev->host->hw->mosi_dlen.usr_mosi_dbitlen = wrbits-1;
spi_dev->host->hw->user.usr_mosi = 1;
if (rdbits) {
spi_dev->host->hw->miso_dlen.usr_miso_dbitlen = rdbits;
spi_dev->host->hw->user.usr_miso = 1;
}
else {
spi_dev->host->hw->miso_dlen.usr_miso_dbitlen = 0;
spi_dev->host->hw->user.usr_miso = 0;
}
// Start transfer
spi_dev->host->hw->cmd.usr = 1;
// Wait for SPI bus ready
while (spi_dev->host->hw->cmd.usr);
}
// Send 1 byte display command, display must be selected
//------------------------------------------------
void IRAM_ATTR disp_spi_transfer_cmd(int8_t cmd) {
// Wait for SPI bus ready
while (tft_disp_spi->host->hw->cmd.usr);
// Set DC to 0 (command mode);
gpio_set_level(PIN_NUM_DC, 0);
tft_disp_spi->host->hw->data_buf[0] = (uint32_t)cmd;
_spi_transfer_start(tft_disp_spi, 8, 0);
}
// Send command with data to display, display must be selected
//----------------------------------------------------------------------------------
void IRAM_ATTR disp_spi_transfer_cmd_data(int8_t cmd, uint8_t *data, uint32_t len) {
// Wait for SPI bus ready
while (tft_disp_spi->host->hw->cmd.usr);
// Set DC to 0 (command mode);
gpio_set_level(PIN_NUM_DC, 0);
tft_disp_spi->host->hw->data_buf[0] = (uint32_t)cmd;
_spi_transfer_start(tft_disp_spi, 8, 0);
if ((len == 0) || (data == NULL)) return;
// Set DC to 1 (data mode);
gpio_set_level(PIN_NUM_DC, 1);
uint8_t idx=0, bidx=0;
uint32_t bits=0;
uint32_t count=0;
uint32_t wd = 0;
while (count < len) {
// get data byte from buffer
wd |= (uint32_t)data[count] << bidx;
count++;
bits += 8;
bidx += 8;
if (count == len) {
tft_disp_spi->host->hw->data_buf[idx] = wd;
break;
}
if (bidx == 32) {
tft_disp_spi->host->hw->data_buf[idx] = wd;
idx++;
bidx = 0;
wd = 0;
}
if (idx == 16) {
// SPI buffer full, send data
_spi_transfer_start(tft_disp_spi, bits, 0);
bits = 0;
idx = 0;
bidx = 0;
}
}
if (bits > 0) _spi_transfer_start(tft_disp_spi, bits, 0);
}
// Set the address window for display write & read commands, display must be selected
//---------------------------------------------------------------------------------------------------
static void IRAM_ATTR disp_spi_transfer_addrwin(uint16_t x1, uint16_t x2, uint16_t y1, uint16_t y2) {
uint32_t wd;
taskDISABLE_INTERRUPTS();
// Wait for SPI bus ready
while (tft_disp_spi->host->hw->cmd.usr);
gpio_set_level(PIN_NUM_DC, 0);
tft_disp_spi->host->hw->data_buf[0] = (uint32_t)TFT_CASET;
tft_disp_spi->host->hw->user.usr_mosi_highpart = 0;
tft_disp_spi->host->hw->mosi_dlen.usr_mosi_dbitlen = 7;
tft_disp_spi->host->hw->user.usr_mosi = 1;
tft_disp_spi->host->hw->miso_dlen.usr_miso_dbitlen = 0;
tft_disp_spi->host->hw->user.usr_miso = 0;
tft_disp_spi->host->hw->cmd.usr = 1; // Start transfer
wd = (uint32_t)(x1>>8);
wd |= (uint32_t)(x1&0xff) << 8;
wd |= (uint32_t)(x2>>8) << 16;
wd |= (uint32_t)(x2&0xff) << 24;
while (tft_disp_spi->host->hw->cmd.usr); // wait transfer end
gpio_set_level(PIN_NUM_DC, 1);
tft_disp_spi->host->hw->data_buf[0] = wd;
tft_disp_spi->host->hw->mosi_dlen.usr_mosi_dbitlen = 31;
tft_disp_spi->host->hw->cmd.usr = 1; // Start transfer
while (tft_disp_spi->host->hw->cmd.usr);
gpio_set_level(PIN_NUM_DC, 0);
tft_disp_spi->host->hw->data_buf[0] = (uint32_t)TFT_PASET;
tft_disp_spi->host->hw->mosi_dlen.usr_mosi_dbitlen = 7;
tft_disp_spi->host->hw->cmd.usr = 1; // Start transfer
wd = (uint32_t)(y1>>8);
wd |= (uint32_t)(y1&0xff) << 8;
wd |= (uint32_t)(y2>>8) << 16;
wd |= (uint32_t)(y2&0xff) << 24;
while (tft_disp_spi->host->hw->cmd.usr);
gpio_set_level(PIN_NUM_DC, 1);
tft_disp_spi->host->hw->data_buf[0] = wd;
tft_disp_spi->host->hw->mosi_dlen.usr_mosi_dbitlen = 31;
tft_disp_spi->host->hw->cmd.usr = 1; // Start transfer
while (tft_disp_spi->host->hw->cmd.usr);
taskENABLE_INTERRUPTS();
}
// Convert color to gray scale
//----------------------------------------------
static color_t IRAM_ATTR color2gs(color_t color)
{
color_t _color;
float gs_clr = GS_FACT_R * color.r + GS_FACT_G * color.g + GS_FACT_B * color.b;
if (gs_clr > 255) gs_clr = 255;
_color.r = (uint8_t)gs_clr;
_color.g = (uint8_t)gs_clr;
_color.b = (uint8_t)gs_clr;
return _color;
}
// Set display pixel at given coordinates to given color
//------------------------------------------------------------------------
void IRAM_ATTR drawPixel(int16_t x, int16_t y, color_t color, uint8_t sel)
{
if (!(tft_disp_spi->cfg.flags & LB_SPI_DEVICE_HALFDUPLEX)) return;
if (sel) {
if (disp_select()) return;
}
else wait_trans_finish(1);
uint32_t wd = 0;
color_t _color = color;
if (tft_gray_scale) _color = color2gs(color);
taskDISABLE_INTERRUPTS();
disp_spi_transfer_addrwin(x, x+1, y, y+1);
// Send RAM WRITE command
gpio_set_level(PIN_NUM_DC, 0);
tft_disp_spi->host->hw->data_buf[0] = (uint32_t)TFT_RAMWR;
tft_disp_spi->host->hw->mosi_dlen.usr_mosi_dbitlen = 7;
tft_disp_spi->host->hw->cmd.usr = 1; // Start transfer
while (tft_disp_spi->host->hw->cmd.usr); // Wait for SPI bus ready
wd = (uint32_t)_color.r;
wd |= (uint32_t)_color.g << 8;
wd |= (uint32_t)_color.b << 16;
// Set DC to 1 (data mode);
gpio_set_level(PIN_NUM_DC, 1);
tft_disp_spi->host->hw->data_buf[0] = wd;
tft_disp_spi->host->hw->mosi_dlen.usr_mosi_dbitlen = 23;
tft_disp_spi->host->hw->cmd.usr = 1; // Start transfer
while (tft_disp_spi->host->hw->cmd.usr); // Wait for SPI bus ready
taskENABLE_INTERRUPTS();
if (sel) disp_deselect();
}
//-----------------------------------------------------------
static void IRAM_ATTR _dma_send(uint8_t *data, uint32_t size)
{
//Fill DMA descriptors
spi_lobo_dmaworkaround_transfer_active(tft_disp_spi->host->dma_chan); //mark channel as active
spi_lobo_setup_dma_desc_links(tft_disp_spi->host->dmadesc_tx, size, data, false);
tft_disp_spi->host->hw->user.usr_mosi_highpart=0;
tft_disp_spi->host->hw->dma_out_link.addr=(int)(&tft_disp_spi->host->dmadesc_tx[0]) & 0xFFFFF;
tft_disp_spi->host->hw->dma_out_link.start=1;
tft_disp_spi->host->hw->user.usr_mosi_highpart=0;
tft_disp_spi->host->hw->mosi_dlen.usr_mosi_dbitlen = (size * 8) - 1;
_dma_sending = 1;
// Start transfer
tft_disp_spi->host->hw->cmd.usr = 1;
}
//---------------------------------------------------------------------------
static void IRAM_ATTR _direct_send(color_t *color, uint32_t len, uint8_t rep)
{
uint32_t cidx = 0; // color buffer index
uint32_t wd = 0;
int idx = 0;
int bits = 0;
int wbits = 0;
taskDISABLE_INTERRUPTS();
color_t _color = color[0];
if ((rep) && (tft_gray_scale)) _color = color2gs(color[0]);
while (len) {
// ** Get color data from color buffer **
if (rep == 0) {
if (tft_gray_scale) _color = color2gs(color[cidx]);
else _color = color[cidx];
}
wd |= (uint32_t)_color.r << wbits;
wbits += 8;
if (wbits == 32) {
bits += wbits;
wbits = 0;
tft_disp_spi->host->hw->data_buf[idx++] = wd;
wd = 0;
}
wd |= (uint32_t)_color.g << wbits;
wbits += 8;
if (wbits == 32) {
bits += wbits;
wbits = 0;
tft_disp_spi->host->hw->data_buf[idx++] = wd;
wd = 0;
}
wd |= (uint32_t)_color.b << wbits;
wbits += 8;
if (wbits == 32) {
bits += wbits;
wbits = 0;
tft_disp_spi->host->hw->data_buf[idx++] = wd;
wd = 0;
}
len--; // Decrement colors counter
if (rep == 0) cidx++; // if not repeating color, increment color buffer index
}
if (bits) {
while (tft_disp_spi->host->hw->cmd.usr); // Wait for SPI bus ready
tft_disp_spi->host->hw->mosi_dlen.usr_mosi_dbitlen = bits-1; // set number of bits to be sent
tft_disp_spi->host->hw->cmd.usr = 1; // Start transfer
}
taskENABLE_INTERRUPTS();
}
// ================================================================
// === Main function to send data to display ======================
// If rep==true: repeat sending color data to display 'len' times
// If rep==false: send 'len' color data from color buffer to display
// ** Device must already be selected and address window set **
// ================================================================
//----------------------------------------------------------------------------------------------
static void IRAM_ATTR _TFT_pushColorRep(color_t *color, uint32_t len, uint8_t rep, uint8_t wait)
{
if (len == 0) return;
if (!(tft_disp_spi->cfg.flags & LB_SPI_DEVICE_HALFDUPLEX)) return;
// Send RAM WRITE command
gpio_set_level(PIN_NUM_DC, 0);
tft_disp_spi->host->hw->data_buf[0] = (uint32_t)TFT_RAMWR;
tft_disp_spi->host->hw->mosi_dlen.usr_mosi_dbitlen = 7;
tft_disp_spi->host->hw->cmd.usr = 1; // Start transfer
while (tft_disp_spi->host->hw->cmd.usr); // Wait for SPI bus ready
gpio_set_level(PIN_NUM_DC, 1); // Set DC to 1 (data mode);
if ((len*24) <= 512) {
_direct_send(color, len, rep);
}
else if (rep == 0) {
// ==== use DMA transfer ====
// ** Prepare data
if (tft_gray_scale) {
for (int n=0; n<len; n++) {
color[n] = color2gs(color[n]);
}
}
_dma_send((uint8_t *)color, len*3);
}
else {
// ==== Repeat color, more than 512 bits total ====
color_t _color;
uint32_t buf_colors;
int buf_bytes, to_send;
/*
to_send = len;
while (to_send > 0) {
wait_trans_finish(0);
_direct_send(color, ((to_send > 21) ? 21 : to_send), rep);
to_send -= 21;
}
*/
buf_colors = ((len > (tft_width*2)) ? (tft_width*2) : len);
buf_bytes = buf_colors * 3;
// Prepare color buffer of maximum 2 color lines
trans_cline = heap_caps_malloc(buf_bytes, MALLOC_CAP_DMA);
if (trans_cline == NULL) return;
// Prepare fill color
if (tft_gray_scale) _color = color2gs(color[0]);
else _color = color[0];
// Fill color buffer with fill color
for (uint32_t i=0; i<buf_colors; i++) {
trans_cline[i] = _color;
}
// Send 'len' colors
to_send = len;
while (to_send > 0) {
wait_trans_finish(0);
_dma_send((uint8_t *)trans_cline, ((to_send > buf_colors) ? buf_bytes : (to_send*3)));
to_send -= buf_colors;
}
}
if (wait) wait_trans_finish(1);
}
// Write 'len' color data to TFT 'window' (x1,y2),(x2,y2)
//-------------------------------------------------------------------------------------------
void IRAM_ATTR TFT_pushColorRep(int x1, int y1, int x2, int y2, color_t color, uint32_t len)
{
if (disp_select() != ESP_OK) return;
// ** Send address window **
disp_spi_transfer_addrwin(x1, x2, y1, y2);
_TFT_pushColorRep(&color, len, 1, 1);
disp_deselect();
}
// Write 'len' color data to TFT 'window' (x1,y2),(x2,y2) from given buffer
// ** Device must already be selected **
//-----------------------------------------------------------------------------------
void IRAM_ATTR send_data(int x1, int y1, int x2, int y2, uint32_t len, color_t *buf)
{
// ** Send address window **
disp_spi_transfer_addrwin(x1, x2, y1, y2);
_TFT_pushColorRep(buf, len, 0, 0);
}
// Reads 'len' pixels/colors from the TFT's GRAM 'window'
// 'buf' is an array of bytes with 1st byte reserved for reading 1 dummy byte
// and the rest is actually an array of color_t values
//--------------------------------------------------------------------------------------------
int IRAM_ATTR read_data(int x1, int y1, int x2, int y2, int len, uint8_t *buf, uint8_t set_sp)
{
spi_lobo_transaction_t t;
uint32_t current_clock = 0;
memset(&t, 0, sizeof(t)); //Zero out the transaction
memset(buf, 0, len*sizeof(color_t));
if (set_sp) {
if (disp_deselect() != ESP_OK) return -1;
// Change spi clock if needed
current_clock = spi_lobo_get_speed(tft_disp_spi);
if (tft_max_rdclock < current_clock) spi_lobo_set_speed(tft_disp_spi, tft_max_rdclock);
}
if (disp_select() != ESP_OK) return -2;
// ** Send address window **
disp_spi_transfer_addrwin(x1, x2, y1, y2);
// ** GET pixels/colors **
disp_spi_transfer_cmd(TFT_RAMRD);
t.length=0; //Send nothing
t.tx_buffer=NULL;
t.rxlength=8*((len*3)+1); //Receive size in bits
t.rx_buffer=buf;
//t.user = (void*)1;
esp_err_t res = spi_lobo_transfer_data(tft_disp_spi, &t); // Receive using direct mode
disp_deselect();
if (set_sp) {
// Restore spi clock if needed
if (tft_max_rdclock < current_clock) spi_lobo_set_speed(tft_disp_spi, current_clock);
}
return res;
}
// Reads one pixel/color from the TFT's GRAM at position (x,y)
//-----------------------------------------------
color_t IRAM_ATTR readPixel(int16_t x, int16_t y)
{
uint8_t color_buf[sizeof(color_t)+1] = {0};
read_data(x, y, x+1, y+1, 1, color_buf, 1);
color_t color;
color.r = color_buf[1];
color.g = color_buf[2];
color.b = color_buf[3];
return color;
}
// get 16-bit data from touch controller for specified type
// ** Touch device must already be selected **
//----------------------------------------
int IRAM_ATTR touch_get_data(uint8_t type)
{
/*
esp_err_t ret;
spi_lobo_transaction_t t;
memset(&t, 0, sizeof(t)); //Zero out the transaction
uint8_t rxdata[2] = {0};
// send command byte & receive 2 byte response
t.rxlength=8*2;
t.rx_buffer=&rxdata;
t.command = type;
ret = spi_lobo_transfer_data(tft_ts_spi, &t); // Transmit using direct mode
if (ret != ESP_OK) return -1;
return (((int)(rxdata[0] << 8) | (int)(rxdata[1])) >> 4);
*/
spi_lobo_device_select(tft_ts_spi, 0);
tft_ts_spi->host->hw->data_buf[0] = type;
_spi_transfer_start(tft_ts_spi, 24, 24);
uint16_t res = (uint16_t)(tft_ts_spi->host->hw->data_buf[0] >> 8);
spi_lobo_device_deselect(tft_ts_spi);
return res;
}
// ==== STMPE610 ===============================================================
// ----- STMPE610 --------------------------------------------------------------------------
// Send 1 byte display command, display must be selected
//---------------------------------------------------------
static void IRAM_ATTR stmpe610_write_reg(uint8_t reg, uint8_t val) {
spi_lobo_device_select(tft_ts_spi, 0);
tft_ts_spi->host->hw->data_buf[0] = (val << 8) | reg;
_spi_transfer_start(tft_ts_spi, 16, 0);
spi_lobo_device_deselect(tft_ts_spi);
}
//-----------------------------------------------
static uint8_t IRAM_ATTR stmpe610_read_byte(uint8_t reg) {
spi_lobo_device_select(tft_ts_spi, 0);
tft_ts_spi->host->hw->data_buf[0] = (reg << 8) | (reg | 0x80);
_spi_transfer_start(tft_ts_spi, 16, 16);
uint8_t res = tft_ts_spi->host->hw->data_buf[0] >> 8;
spi_lobo_device_deselect(tft_ts_spi);
return res;
}
//-----------------------------------------
static uint16_t IRAM_ATTR stmpe610_read_word(uint8_t reg) {
spi_lobo_device_select(tft_ts_spi, 0);
tft_ts_spi->host->hw->data_buf[0] = ((((reg+1) << 8) | ((reg+1) | 0x80)) << 16) | (reg << 8) | (reg | 0x80);
_spi_transfer_start(tft_ts_spi, 32, 32);
uint16_t res = (uint16_t)(tft_ts_spi->host->hw->data_buf[0] & 0xFF00);
res |= (uint16_t)(tft_ts_spi->host->hw->data_buf[0] >> 24);
spi_lobo_device_deselect(tft_ts_spi);
return res;
}
//-----------------------
uint32_t stmpe610_getID()
{
uint16_t tid = stmpe610_read_word(0);
uint8_t tver = stmpe610_read_byte(2);
return (tid << 8) | tver;
}
//==================
void stmpe610_Init()
{
stmpe610_write_reg(STMPE610_REG_SYS_CTRL1, 0x02); // Software chip reset
vTaskDelay(10 / portTICK_RATE_MS);
stmpe610_write_reg(STMPE610_REG_SYS_CTRL2, 0x04); // Temperature sensor clock off, GPIO clock off, touch clock on, ADC clock on
stmpe610_write_reg(STMPE610_REG_INT_EN, 0x00); // Don't Interrupt on INT pin
stmpe610_write_reg(STMPE610_REG_ADC_CTRL1, 0x48); // ADC conversion time = 80 clock ticks, 12-bit ADC, internal voltage refernce
vTaskDelay(2 / portTICK_RATE_MS);
stmpe610_write_reg(STMPE610_REG_ADC_CTRL2, 0x01); // ADC speed 3.25MHz
stmpe610_write_reg(STMPE610_REG_GPIO_AF, 0x00); // GPIO alternate function - OFF
stmpe610_write_reg(STMPE610_REG_TSC_CFG, 0xE3); // Averaging 8, touch detect delay 1ms, panel driver settling time 1ms
stmpe610_write_reg(STMPE610_REG_FIFO_TH, 0x01); // FIFO threshold = 1
stmpe610_write_reg(STMPE610_REG_FIFO_STA, 0x01); // FIFO reset enable
stmpe610_write_reg(STMPE610_REG_FIFO_STA, 0x00); // FIFO reset disable
stmpe610_write_reg(STMPE610_REG_TSC_FRACT_XYZ, 0x07); // Z axis data format
stmpe610_write_reg(STMPE610_REG_TSC_I_DRIVE, 0x01); // max 50mA touchscreen line current
stmpe610_write_reg(STMPE610_REG_TSC_CTRL, 0x30); // X&Y&Z, 16 reading window
stmpe610_write_reg(STMPE610_REG_TSC_CTRL, 0x31); // X&Y&Z, 16 reading window, TSC enable
stmpe610_write_reg(STMPE610_REG_INT_STA, 0xFF); // Clear all interrupts
stmpe610_write_reg(STMPE610_REG_INT_CTRL, 0x00); // Level interrupt, disable interrupts
}
//===========================================================
int stmpe610_get_touch(uint16_t *x, uint16_t *y, uint16_t *z)
{
if (!(stmpe610_read_byte(STMPE610_REG_TSC_CTRL) & 0x80)) return 0;
// Get touch data
uint8_t fifo_size = stmpe610_read_byte(STMPE610_REG_FIFO_SIZE);
while (fifo_size < 2) {
if (!(stmpe610_read_byte(STMPE610_REG_TSC_CTRL) & 0x80)) return 0;
fifo_size = stmpe610_read_byte(STMPE610_REG_FIFO_SIZE);
}
while (fifo_size > 120) {
if (!(stmpe610_read_byte(STMPE610_REG_TSC_CTRL) & 0x80)) return 0;
*x = stmpe610_read_word(STMPE610_REG_TSC_DATA_X);
*y = stmpe610_read_word(STMPE610_REG_TSC_DATA_Y);
*z = stmpe610_read_byte(STMPE610_REG_TSC_DATA_Z);
fifo_size = stmpe610_read_byte(STMPE610_REG_FIFO_SIZE);
}
for (uint8_t i=0; i < (fifo_size-1); i++) {
*x = stmpe610_read_word(STMPE610_REG_TSC_DATA_X);
*y = stmpe610_read_word(STMPE610_REG_TSC_DATA_Y);
*z = stmpe610_read_byte(STMPE610_REG_TSC_DATA_Z);
}
*x = 4096 - *x;
/*
// Clear the rest of the fifo
{
stmpe610_write_reg(STMPE610_REG_FIFO_STA, 0x01); // FIFO reset enable
stmpe610_write_reg(STMPE610_REG_FIFO_STA, 0x00); // FIFO reset disable
}
*/
return 1;
}
// ==== STMPE610 ===========================================================================
// Find maximum spi clock for successful read from display RAM
// ** Must be used AFTER the display is initialized **
//======================
uint32_t find_rd_speed()
{
esp_err_t ret;
color_t color;
uint32_t max_speed = 1000000;
uint32_t change_speed, cur_speed;
int line_check;
color_t *color_line = NULL;
uint8_t *line_rdbuf = NULL;
uint8_t gs = tft_gray_scale;
tft_gray_scale = 0;
cur_speed = spi_lobo_get_speed(tft_disp_spi);
color_line = malloc(tft_width*3);
if (color_line == NULL) goto exit;
line_rdbuf = malloc((tft_width*3)+1);
if (line_rdbuf == NULL) goto exit;
color_t *rdline = (color_t *)(line_rdbuf+1);
// Fill test line with colors
color = (color_t){0xEC,0xA8,0x74};
for (int x=0; x<tft_width; x++) {
color_line[x] = color;
}
// Find maximum read spi clock
for (uint32_t speed=2000000; speed<=cur_speed; speed += 1000000) {
change_speed = spi_lobo_set_speed(tft_disp_spi, speed);
if (change_speed == 0) goto exit;
memset(line_rdbuf, 0, tft_width*sizeof(color_t)+1);
if (disp_select()) goto exit;
// Write color line
send_data(0, tft_height/2, tft_width-1, tft_height/2, tft_width, color_line);
if (disp_deselect()) goto exit;
// Read color line
ret = read_data(0, tft_height/2, tft_width-1, tft_height/2, tft_width, line_rdbuf, 0);
// Compare
line_check = 0;
if (ret == ESP_OK) {
for (int y=0; y<tft_width; y++) {
if ((color_line[y].r & 0xFC) != (rdline[y].r & 0xFC)) line_check = 1;
else if ((color_line[y].g & 0xFC) != (rdline[y].g & 0xFC)) line_check = 1;
else if ((color_line[y].b & 0xFC) != (rdline[y].b & 0xFC)) line_check = 1;
if (line_check) break;
}
}
else line_check = ret;
if (line_check) break;
max_speed = speed;
}
exit:
tft_gray_scale = gs;
if (line_rdbuf) free(line_rdbuf);
if (color_line) free(color_line);
// restore spi clk
change_speed = spi_lobo_set_speed(tft_disp_spi, cur_speed);
return max_speed;
}
//---------------------------------------------------------------------------
// Companion code to the initialization table.
// Reads and issues a series of LCD commands stored in byte array
//---------------------------------------------------------------------------
static void commandList(spi_lobo_device_handle_t spi, const uint8_t *addr) {
uint8_t numCommands, numArgs, cmd;
uint16_t ms;
numCommands = *addr++; // Number of commands to follow
while(numCommands--) { // For each command...
cmd = *addr++; // save command
numArgs = *addr++; // Number of args to follow
ms = numArgs & TFT_CMD_DELAY; // If high bit set, delay follows args
numArgs &= ~TFT_CMD_DELAY; // Mask out delay bit
disp_spi_transfer_cmd_data(cmd, (uint8_t *)addr, numArgs);
addr += numArgs;
if(ms) {
ms = *addr++; // Read post-command delay time (ms)
if(ms == 255) ms = 500; // If 255, delay for 500 ms
vTaskDelay(ms / portTICK_RATE_MS);
}
}
}
//==================================
void _tft_setRotation(uint8_t rot) {
uint8_t rotation = rot & 3; // can't be higher than 3
uint8_t send = 1;
uint8_t madctl = 0;
uint16_t tmp;
if ((rotation & 1)) {
// in landscape modes must be width > height
if (tft_width < tft_height) {
tmp = tft_width;
tft_width = tft_height;
tft_height = tmp;
}
}
else {
// in portrait modes must be width < height
if (tft_width > tft_height) {
tmp = tft_width;
tft_width = tft_height;
tft_height = tmp;
}
}
#if TFT_INVERT_ROTATION
switch (rotation) {
case PORTRAIT:
madctl = (MADCTL_MV | TFT_RGB_BGR);
break;
case LANDSCAPE:
madctl = (MADCTL_MX | TFT_RGB_BGR);
break;
case PORTRAIT_FLIP:
madctl = (MADCTL_MV | TFT_RGB_BGR);
break;
case LANDSCAPE_FLIP:
madctl = (MADCTL_MY | TFT_RGB_BGR);
break;
}
#elif TFT_INVERT_ROTATION1
switch (rotation) {
case PORTRAIT:
madctl = (MADCTL_MY | MADCTL_MX | TFT_RGB_BGR);
break;
case LANDSCAPE:
madctl = (MADCTL_MY | MADCTL_MV | TFT_RGB_BGR);
break;
case PORTRAIT_FLIP:
madctl = (TFT_RGB_BGR);
break;
case LANDSCAPE_FLIP:
madctl = (MADCTL_MX | MADCTL_MV | TFT_RGB_BGR);
break;
}
#elif TFT_INVERT_ROTATION2
switch (rotation) {
case PORTRAIT:
madctl = (MADCTL_MX | MADCTL_MV | TFT_RGB_BGR);
break;
case LANDSCAPE:
madctl = (TFT_RGB_BGR);
break;
case PORTRAIT_FLIP:
madctl = (MADCTL_MY | MADCTL_MV | TFT_RGB_BGR);
break;
case LANDSCAPE_FLIP:
madctl = (MADCTL_MY | MADCTL_MX | TFT_RGB_BGR);
break;
}
#else
switch (rotation) {
case PORTRAIT:
madctl = (MADCTL_MX | TFT_RGB_BGR);
break;
case LANDSCAPE:
madctl = (MADCTL_MV | TFT_RGB_BGR);
break;
case PORTRAIT_FLIP:
madctl = (MADCTL_MY | TFT_RGB_BGR);
break;
case LANDSCAPE_FLIP:
madctl = (MADCTL_MX | MADCTL_MY | MADCTL_MV | TFT_RGB_BGR);
break;
}
#endif
if (send) {
if (disp_select() == ESP_OK) {
disp_spi_transfer_cmd_data(TFT_MADCTL, &madctl, 1);
disp_deselect();
}
}
}
//=================
void TFT_PinsInit()
{
// Route all used pins to GPIO control
gpio_pad_select_gpio(PIN_NUM_CS);
gpio_pad_select_gpio(PIN_NUM_MISO);
gpio_pad_select_gpio(PIN_NUM_MOSI);
gpio_pad_select_gpio(PIN_NUM_CLK);
gpio_pad_select_gpio(PIN_NUM_DC);
gpio_set_direction(PIN_NUM_MISO, GPIO_MODE_INPUT);
gpio_set_pull_mode(PIN_NUM_MISO, GPIO_PULLUP_ONLY);
gpio_set_direction(PIN_NUM_CS, GPIO_MODE_OUTPUT);
gpio_set_direction(PIN_NUM_MOSI, GPIO_MODE_OUTPUT);
gpio_set_direction(PIN_NUM_CLK, GPIO_MODE_OUTPUT);
gpio_set_direction(PIN_NUM_DC, GPIO_MODE_OUTPUT);
gpio_set_level(PIN_NUM_DC, 0);
#if USE_TOUCH
gpio_pad_select_gpio(PIN_NUM_TCS);
gpio_set_direction(PIN_NUM_TCS, GPIO_MODE_OUTPUT);
#endif
#if PIN_NUM_BCKL
gpio_pad_select_gpio(PIN_NUM_BCKL);
gpio_set_direction(PIN_NUM_BCKL, GPIO_MODE_OUTPUT);
gpio_set_level(PIN_NUM_BCKL, PIN_BCKL_OFF);
#endif
#if PIN_NUM_RST
gpio_pad_select_gpio(PIN_NUM_RST);
gpio_set_direction(PIN_NUM_RST, GPIO_MODE_OUTPUT);
gpio_set_level(PIN_NUM_RST, 0);
#endif
}
// Initialize the display
// ====================
void TFT_display_init()
{
esp_err_t ret;
#if PIN_NUM_RST
//Reset the display
gpio_set_level(PIN_NUM_RST, 0);
vTaskDelay(20 / portTICK_RATE_MS);
gpio_set_level(PIN_NUM_RST, 1);
vTaskDelay(150 / portTICK_RATE_MS);
#endif
ret = disp_select();
assert(ret==ESP_OK);
//Send all the initialization commands
if (tft_disp_type == DISP_TYPE_ILI9341) {
commandList(tft_disp_spi, ILI9341_init);
}
else if (tft_disp_type == DISP_TYPE_ILI9488) {
commandList(tft_disp_spi, ILI9488_init);
}
else if (tft_disp_type == DISP_TYPE_ST7789V) {
commandList(tft_disp_spi, ST7789V_init);
}
else if (tft_disp_type == DISP_TYPE_ST7735) {
commandList(tft_disp_spi, STP7735_init);
}
else if (tft_disp_type == DISP_TYPE_ST7735R) {
commandList(tft_disp_spi, STP7735R_init);
commandList(tft_disp_spi, Rcmd2green);
commandList(tft_disp_spi, Rcmd3);
}
else if (tft_disp_type == DISP_TYPE_ST7735B) {
commandList(tft_disp_spi, STP7735R_init);
commandList(tft_disp_spi, Rcmd2red);
commandList(tft_disp_spi, Rcmd3);
uint8_t dt = 0xC0;
disp_spi_transfer_cmd_data(TFT_MADCTL, &dt, 1);
}
else assert(0);
ret = disp_deselect();
assert(ret==ESP_OK);
// Clear screen
_tft_setRotation(PORTRAIT);
TFT_pushColorRep(TFT_STATIC_WIDTH_OFFSET, TFT_STATIC_HEIGHT_OFFSET, tft_width + TFT_STATIC_WIDTH_OFFSET -1, tft_height + TFT_STATIC_HEIGHT_OFFSET -1, (color_t){0,0,0}, (uint32_t)(tft_height*tft_width));
///Enable backlight
#if PIN_NUM_BCKL
gpio_set_level(PIN_NUM_BCKL, PIN_BCKL_ON);
#endif
}
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