mirror of
https://github.com/ByteWelder/Tactility.git
synced 2026-02-18 19:03:16 +00:00
369 lines
11 KiB
C++
369 lines
11 KiB
C++
#include "Xpt2046SoftSpi.h"
|
|
|
|
#include <Tactility/Log.h>
|
|
#include <Tactility/lvgl/LvglSync.h>
|
|
|
|
#include <driver/gpio.h>
|
|
#include <esp_err.h>
|
|
#include <esp_lvgl_port.h>
|
|
#include <freertos/FreeRTOS.h>
|
|
#include <freertos/task.h>
|
|
#include <inttypes.h>
|
|
#include <nvs.h>
|
|
#include <nvs_flash.h>
|
|
#include <rom/ets_sys.h>
|
|
|
|
constexpr auto* TAG = "Xpt2046SoftSpi";
|
|
|
|
constexpr auto RERUN_CALIBRATE = false;
|
|
constexpr auto CMD_READ_Y = 0x90; // Try different commands if these don't work
|
|
constexpr auto CMD_READ_X = 0xD0; // Alternative: 0x98 for Y, 0xD8 for X
|
|
|
|
struct Calibration {
|
|
int xMin;
|
|
int xMax;
|
|
int yMin;
|
|
int yMax;
|
|
};
|
|
|
|
Calibration cal = {
|
|
.xMin = 100,
|
|
.xMax = 1900,
|
|
.yMin = 100,
|
|
.yMax = 1900
|
|
};
|
|
|
|
Xpt2046SoftSpi::Xpt2046SoftSpi(std::unique_ptr<Configuration> inConfiguration)
|
|
: configuration(std::move(inConfiguration)) {
|
|
assert(configuration != nullptr);
|
|
}
|
|
|
|
// Defensive check for NVS, put here just in case NVS is init after touch setup.
|
|
static void ensureNvsInitialized() {
|
|
static bool initialized = false;
|
|
if (initialized) return;
|
|
|
|
esp_err_t result = nvs_flash_init();
|
|
if (result == ESP_ERR_NVS_NO_FREE_PAGES || result == ESP_ERR_NVS_NEW_VERSION_FOUND) {
|
|
nvs_flash_erase(); // ignore error for safety
|
|
result = nvs_flash_init();
|
|
}
|
|
|
|
initialized = (result == ESP_OK);
|
|
}
|
|
|
|
bool Xpt2046SoftSpi::start() {
|
|
ensureNvsInitialized();
|
|
|
|
TT_LOG_I(TAG, "Starting Xpt2046SoftSpi touch driver");
|
|
|
|
// Configure GPIO pins
|
|
gpio_config_t io_conf = {};
|
|
|
|
// Configure MOSI, CLK, CS as outputs
|
|
io_conf.intr_type = GPIO_INTR_DISABLE;
|
|
io_conf.mode = GPIO_MODE_OUTPUT;
|
|
io_conf.pin_bit_mask = (1ULL << configuration->mosiPin) |
|
|
(1ULL << configuration->clkPin) |
|
|
(1ULL << configuration->csPin);
|
|
io_conf.pull_down_en = GPIO_PULLDOWN_DISABLE;
|
|
io_conf.pull_up_en = GPIO_PULLUP_DISABLE;
|
|
|
|
if (gpio_config(&io_conf) != ESP_OK) {
|
|
TT_LOG_E(TAG, "Failed to configure output pins");
|
|
return false;
|
|
}
|
|
|
|
// Configure MISO as input
|
|
io_conf.mode = GPIO_MODE_INPUT;
|
|
io_conf.pin_bit_mask = (1ULL << configuration->misoPin);
|
|
io_conf.pull_up_en = GPIO_PULLUP_ENABLE;
|
|
|
|
if (gpio_config(&io_conf) != ESP_OK) {
|
|
TT_LOG_E(TAG, "Failed to configure input pin");
|
|
return false;
|
|
}
|
|
|
|
// Initialize pin states
|
|
gpio_set_level(configuration->csPin, 1); // CS high
|
|
gpio_set_level(configuration->clkPin, 0); // CLK low
|
|
gpio_set_level(configuration->mosiPin, 0); // MOSI low
|
|
|
|
TT_LOG_I(TAG, "GPIO configured: MOSI=%d, MISO=%d, CLK=%d, CS=%d", configuration->mosiPin, configuration->misoPin, configuration->clkPin, configuration->csPin);
|
|
|
|
// Load or perform calibration
|
|
bool calibrationValid = true; //loadCalibration() && !RERUN_CALIBRATE;
|
|
if (calibrationValid) {
|
|
// Check if calibration values are valid (xMin != xMax, yMin != yMax)
|
|
if (cal.xMin == cal.xMax || cal.yMin == cal.yMax) {
|
|
TT_LOG_W(TAG, "Invalid calibration detected: xMin=%d, xMax=%d, yMin=%d, yMax=%d", cal.xMin, cal.xMax, cal.yMin, cal.yMax);
|
|
calibrationValid = false;
|
|
}
|
|
}
|
|
|
|
if (!calibrationValid) {
|
|
TT_LOG_W(TAG, "Calibration data not found, invalid, or forced recalibration");
|
|
calibrate();
|
|
saveCalibration();
|
|
} else {
|
|
TT_LOG_I(TAG, "Loaded calibration: xMin=%d, yMin=%d, xMax=%d, yMax=%d", cal.xMin, cal.yMin, cal.xMax, cal.yMax);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool Xpt2046SoftSpi::stop() {
|
|
TT_LOG_I(TAG, "Stopping Xpt2046SoftSpi touch driver");
|
|
|
|
// Stop LVLG if needed
|
|
if (lvglDevice != nullptr) {
|
|
stopLvgl();
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool Xpt2046SoftSpi::startLvgl(lv_display_t* display) {
|
|
if (lvglDevice != nullptr) {
|
|
TT_LOG_E(TAG, "LVGL was already started");
|
|
return false;
|
|
}
|
|
|
|
lvglDevice = lv_indev_create();
|
|
if (!lvglDevice) {
|
|
TT_LOG_E(TAG, "Failed to create LVGL input device");
|
|
return false;
|
|
}
|
|
|
|
lv_indev_set_type(lvglDevice, LV_INDEV_TYPE_POINTER);
|
|
lv_indev_set_read_cb(lvglDevice, touchReadCallback);
|
|
lv_indev_set_user_data(lvglDevice, this);
|
|
|
|
TT_LOG_I(TAG, "Xpt2046SoftSpi touch driver started successfully");
|
|
return true;
|
|
}
|
|
|
|
bool Xpt2046SoftSpi::stopLvgl() {
|
|
if (lvglDevice != nullptr) {
|
|
lv_indev_delete(lvglDevice);
|
|
lvglDevice = nullptr;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
int Xpt2046SoftSpi::readSPI(uint8_t command) {
|
|
int result = 0;
|
|
|
|
// Pull CS low for this transaction
|
|
gpio_set_level(configuration->csPin, 0);
|
|
ets_delay_us(1);
|
|
|
|
// Send 8-bit command
|
|
for (int i = 7; i >= 0; i--) {
|
|
gpio_set_level(configuration->mosiPin, command & (1 << i));
|
|
gpio_set_level(configuration->clkPin, 1);
|
|
ets_delay_us(1);
|
|
gpio_set_level(configuration->clkPin, 0);
|
|
ets_delay_us(1);
|
|
}
|
|
|
|
for (int i = 11; i >= 0; i--) {
|
|
gpio_set_level(configuration->clkPin, 1);
|
|
ets_delay_us(1);
|
|
if (gpio_get_level(configuration->misoPin)) {
|
|
result |= (1 << i);
|
|
}
|
|
gpio_set_level(configuration->clkPin, 0);
|
|
ets_delay_us(1);
|
|
}
|
|
|
|
// Pull CS high for this transaction
|
|
gpio_set_level(configuration->csPin, 1);
|
|
|
|
return result;
|
|
}
|
|
|
|
void Xpt2046SoftSpi::calibrate() {
|
|
const int samples = 8; // More samples for better accuracy
|
|
|
|
TT_LOG_I(TAG, "Calibration starting...");
|
|
|
|
TT_LOG_I(TAG, "Touch TOP-LEFT corner");
|
|
|
|
while (!isTouched()) {
|
|
vTaskDelay(pdMS_TO_TICKS(50));
|
|
}
|
|
|
|
int sumX = 0, sumY = 0;
|
|
for (int i = 0; i < samples; i++) {
|
|
sumX += readSPI(CMD_READ_X);
|
|
sumY += readSPI(CMD_READ_Y);
|
|
vTaskDelay(pdMS_TO_TICKS(10));
|
|
}
|
|
cal.xMin = sumX / samples;
|
|
cal.yMin = sumY / samples;
|
|
|
|
TT_LOG_I(TAG, "Top-left calibrated: xMin=%d, yMin=%d", cal.xMin, cal.yMin);
|
|
|
|
TT_LOG_I(TAG, "Touch BOTTOM-RIGHT corner");
|
|
|
|
while (!isTouched()) {
|
|
vTaskDelay(pdMS_TO_TICKS(50));
|
|
}
|
|
|
|
sumX = sumY = 0;
|
|
for (int i = 0; i < samples; i++) {
|
|
sumX += readSPI(CMD_READ_X);
|
|
sumY += readSPI(CMD_READ_Y);
|
|
vTaskDelay(pdMS_TO_TICKS(10));
|
|
}
|
|
cal.xMax = sumX / samples;
|
|
cal.yMax = sumY / samples;
|
|
|
|
TT_LOG_I(TAG, "Bottom-right calibrated: xMax=%d, yMax=%d", cal.xMax, cal.yMax);
|
|
|
|
TT_LOG_I(TAG, "Calibration completed! xMin=%d, yMin=%d, xMax=%d, yMax=%d", cal.xMin, cal.yMin, cal.xMax, cal.yMax);
|
|
}
|
|
|
|
bool Xpt2046SoftSpi::loadCalibration() {
|
|
TT_LOG_W(TAG, "Calibration load disabled (using fresh calibration only).");
|
|
return false;
|
|
}
|
|
|
|
void Xpt2046SoftSpi::saveCalibration() {
|
|
nvs_handle_t handle;
|
|
esp_err_t err = nvs_open("xpt2046", NVS_READWRITE, &handle);
|
|
if (err != ESP_OK) {
|
|
TT_LOG_E(TAG, "Failed to open NVS for writing (%s)", esp_err_to_name(err));
|
|
return;
|
|
}
|
|
|
|
err = nvs_set_blob(handle, "cal", &cal, sizeof(cal));
|
|
if (err == ESP_OK) {
|
|
nvs_commit(handle);
|
|
TT_LOG_I(TAG, "Calibration saved to NVS");
|
|
} else {
|
|
TT_LOG_E(TAG, "Failed to write calibration data to NVS (%s)", esp_err_to_name(err));
|
|
}
|
|
|
|
nvs_close(handle);
|
|
}
|
|
|
|
void Xpt2046SoftSpi::setCalibration(int xMin, int yMin, int xMax, int yMax) {
|
|
cal.xMin = xMin;
|
|
cal.yMin = yMin;
|
|
cal.xMax = xMax;
|
|
cal.yMax = yMax;
|
|
TT_LOG_I(TAG, "Manual calibration set: xMin=%d, yMin=%d, xMax=%d, yMax=%d", xMin, yMin, xMax, yMax);
|
|
}
|
|
|
|
bool Xpt2046SoftSpi::getTouchPoint(Point& point) {
|
|
|
|
const int samples = 8; // More samples for better accuracy
|
|
int totalX = 0, totalY = 0;
|
|
int validSamples = 0;
|
|
|
|
gpio_set_level(configuration->csPin, 0);
|
|
|
|
for (int i = 0; i < samples; i++) {
|
|
int rawX = readSPI(CMD_READ_X);
|
|
int rawY = readSPI(CMD_READ_Y);
|
|
|
|
// Only use valid readings
|
|
if (rawX > 100 && rawX < 3900 && rawY > 100 && rawY < 3900) {
|
|
totalX += rawX;
|
|
totalY += rawY;
|
|
validSamples++;
|
|
}
|
|
|
|
vTaskDelay(pdMS_TO_TICKS(1));
|
|
}
|
|
|
|
gpio_set_level(configuration->csPin, 1);
|
|
|
|
if (validSamples == 0) {
|
|
return false;
|
|
}
|
|
|
|
int rawX = totalX / validSamples;
|
|
int rawY = totalY / validSamples;
|
|
|
|
const int xRange = cal.xMax - cal.xMin;
|
|
const int yRange = cal.yMax - cal.yMin;
|
|
|
|
if (xRange <= 0 || yRange <= 0) {
|
|
TT_LOG_W(TAG, "Invalid calibration: xRange=%d, yRange=%d", xRange, yRange);
|
|
return false;
|
|
}
|
|
|
|
int x = (rawX - cal.xMin) * configuration->xMax / xRange;
|
|
int y = (rawY - cal.yMin) * configuration->yMax / yRange;
|
|
|
|
if (configuration->swapXy) std::swap(x, y);
|
|
if (configuration->mirrorX) x = configuration->xMax - x;
|
|
if (configuration->mirrorY) y = configuration->yMax - y;
|
|
|
|
point.x = std::clamp(x, 0, (int)configuration->xMax);
|
|
point.y = std::clamp(y, 0, (int)configuration->yMax);
|
|
|
|
return true;
|
|
}
|
|
|
|
// TODO: Merge isTouched() and getTouchPoint() into 1 method
|
|
bool Xpt2046SoftSpi::isTouched() {
|
|
const int samples = 3;
|
|
int xTotal = 0, yTotal = 0;
|
|
int validSamples = 0;
|
|
|
|
gpio_set_level(configuration->csPin, 0);
|
|
|
|
for (int i = 0; i < samples; i++) {
|
|
int x = readSPI(CMD_READ_X);
|
|
int y = readSPI(CMD_READ_Y);
|
|
|
|
// Basic validity check - XPT2046 typically returns values in range 100-3900 when touched
|
|
if (x > 100 && x < 3900 && y > 100 && y < 3900) {
|
|
xTotal += x;
|
|
yTotal += y;
|
|
validSamples++;
|
|
}
|
|
|
|
vTaskDelay(pdMS_TO_TICKS(1)); // Small delay between samples
|
|
}
|
|
gpio_set_level(configuration->csPin, 1);
|
|
|
|
// Consider touched if we got valid readings
|
|
bool touched = validSamples >= 2;
|
|
|
|
// Debug logging (remove this once working)
|
|
if (touched) {
|
|
TT_LOG_D(TAG, "Touch detected: validSamples=%d, avgX=%d, avgY=%d", validSamples, xTotal / validSamples, yTotal / validSamples);
|
|
}
|
|
|
|
return touched;
|
|
}
|
|
|
|
void Xpt2046SoftSpi::touchReadCallback(lv_indev_t* indev, lv_indev_data_t* data) {
|
|
Xpt2046SoftSpi* touch = static_cast<Xpt2046SoftSpi*>(lv_indev_get_user_data(indev));
|
|
|
|
Point point;
|
|
if (touch && touch->isTouched() && touch->getTouchPoint(point)) {
|
|
data->point.x = point.x;
|
|
data->point.y = point.y;
|
|
data->state = LV_INDEV_STATE_PRESSED;
|
|
} else {
|
|
data->state = LV_INDEV_STATE_RELEASED;
|
|
}
|
|
}
|
|
|
|
// Return driver instance if any
|
|
std::shared_ptr<tt::hal::touch::TouchDriver> Xpt2046SoftSpi::getTouchDriver() {
|
|
assert(lvglDevice == nullptr); // Still attached to LVGL context. Call stopLvgl() first.
|
|
|
|
if (touchDriver == nullptr) {
|
|
touchDriver = std::make_shared<Xpt2046SoftSpiDriver>(this);
|
|
}
|
|
|
|
return touchDriver;
|
|
}
|