Various fixes and improvements (#269)

- Bump version for next release
- Fix default gamma for CYD 2432S032C
- Remember gamma curve setting from Display settings app
- Add UART to Core2 (still has no voltage on Grove port, though)
- LVGL performance improvements: pin to second core and set task priority to "critical"
- Fix build warnings, including deprecations
- Removed deprecated `Thread` constructor
- Fix WaveShare S3 display: Some displays would show a white screen at 12MHz, so I'm putting it back to the
official config values.

Boards/CYD-2432S032C/Source/CYD2432S032C.cpp

@@ -3,12 +3,26 @@
 #include "hal/CydDisplay.h"
 #include "hal/CydSdCard.h"
 
+#include <Tactility/kernel/SystemEvents.h>
+
 #include <PwmBacklight.h>
 
-#define CYD_SPI_TRANSFER_SIZE_LIMIT (TWODOTFOUR_LCD_DRAW_BUFFER_SIZE * LV_COLOR_DEPTH / 8)
-
 bool initBoot() {
-    return driver::pwmbacklight::init(GPIO_NUM_27);
+    if (!driver::pwmbacklight::init(GPIO_NUM_27)) {
+        return false;
+    }
+
+    // This display has a weird glitch with gamma during boot, which results in uneven dark gray colours.
+    // Setting gamma curve index to 0 doesn't work at boot for an unknown reason, so we set the curve index to 1:
+    tt::kernel::subscribeSystemEvent(tt::kernel::SystemEvent::BootInitLvglEnd, [](auto event) {
+        auto display = tt::hal::findFirstDevice<tt::hal::display::DisplayDevice>(tt::hal::Device::Type::Display);
+        assert(display != nullptr);
+        tt::lvgl::lock(portMAX_DELAY);
+        display->setGammaCurve(1U);
+        tt::lvgl::unlock();
+    });
+
+    return true;
 }
 
 const tt::hal::Configuration cyd_2432S032c_config = {

Boards/M5stackCore2/Source/M5stackCore2.cpp

@@ -9,6 +9,8 @@
 
 #define CORE2_SPI_TRANSFER_SIZE_LIMIT (CORE2_LCD_DRAW_BUFFER_SIZE * LV_COLOR_DEPTH / 8)
 
+using namespace tt::hal;
+
 extern const tt::hal::Configuration m5stack_core2 = {
     .initBoot = initBoot,
     .createDisplay = createDisplay,
@@ -74,5 +76,30 @@ extern const tt::hal::Configuration m5stack_core2 = {
             .isMutable = false,
             .lock = tt::lvgl::getSyncLock() // esp_lvgl_port owns the lock for the display
         }
+    },
+    .uart {
+        uart::Configuration {
+            .name = "Grove",
+            .port = UART_NUM_1,
+            .rxPin = GPIO_NUM_32,
+            .txPin = GPIO_NUM_33,
+            .rtsPin = GPIO_NUM_NC,
+            .ctsPin = GPIO_NUM_NC,
+            .rxBufferSize = 1024,
+            .txBufferSize = 1024,
+            .config = {
+                .baud_rate = 115200,
+                .data_bits = UART_DATA_8_BITS,
+                .parity    = UART_PARITY_DISABLE,
+                .stop_bits = UART_STOP_BITS_1,
+                .flow_ctrl = UART_HW_FLOWCTRL_DISABLE,
+                .rx_flow_ctrl_thresh = 0,
+                .source_clk = UART_SCLK_DEFAULT,
+                .flags = {
+                    .allow_pd = 0,
+                    .backup_before_sleep = 0,
+                }
+            }
+        },
     }
 };

Boards/UnPhone/Source/PowerOn.cpp

@@ -137,7 +137,7 @@ static void updatePowerSwitch() {
     }
 }
 
-static int32_t powerSwitchMain(void*) { // check power switch every 10th of sec
+static int32_t powerSwitchMain() { // check power switch every 10th of sec
     while (true) {
         updatePowerSwitch();
         tt::kernel::delayMillis(200);
@@ -148,8 +148,7 @@ static void startPowerSwitchThread() {
     powerThread = std::make_unique<tt::Thread>(
         "unphone_power_switch",
         4096,
-        powerSwitchMain,
-        nullptr
+        []() { return powerSwitchMain(); }
     );
     powerThread->start();
 }

Boards/WaveshareS3Touch43/Source/hal/WaveshareDisplay.cpp

@@ -23,15 +23,15 @@ std::shared_ptr<tt::hal::display::DisplayDevice> createDisplay() {
     esp_lcd_rgb_panel_config_t rgb_panel_config = {
         .clk_src = LCD_CLK_SRC_DEFAULT,
         .timings = {
-            .pclk_hz = 12'000'000, // NOTE: original was 14MHz, but we had to slow it down with PSRAM frame buffer,
+            .pclk_hz = 16'000'000,
             .h_res = 800,
             .v_res = 480,
-            .hsync_pulse_width = 10,
-            .hsync_back_porch = 10,
-            .hsync_front_porch = 20,
-            .vsync_pulse_width = 10,
-            .vsync_back_porch = 10,
-            .vsync_front_porch = 10,
+            .hsync_pulse_width = 4,
+            .hsync_back_porch = 8,
+            .hsync_front_porch = 8,
+            .vsync_pulse_width = 4,
+            .vsync_back_porch = 8,
+            .vsync_front_porch = 8,
             .flags = {
                 .hsync_idle_low = false,
                 .vsync_idle_low = false,