yuge overhaul, threads, hass, rewrote display, hwmons, bunc of shit

src/LCDDisplay.cpp

@@ -4,6 +4,8 @@
 #include <termios.h>
 #include <unistd.h>
 
+#include <cstring>
+#include <iostream>
 #include <print>
 #include <string>
 
@@ -27,6 +29,7 @@ LCDDisplay::LCDDisplay(std::string dev, uint32_t baud) {
     tcflush(lcd, TCIFLUSH);
     tcsetattr(lcd, TCSANOW, &term);
     _lcd = lcd;
+    std::memset(linebuf, ' ', sizeof(linebuf));  // init linebuf to spaces
 }
 
 LCDDisplay::~LCDDisplay() {
@@ -46,7 +49,7 @@ void LCDDisplay::setContrast(uint8_t contrast) {
 }
 
 void LCDDisplay::setBacklight(bool enabled) {
-    std::println("[LCDDisplay] Set brightness to {}", enabled);
+    std::println("[LCDDisplay] Set backlight to {}", enabled);
     uint8_t cmdbuf[] = {254, (uint8_t)(enabled ? 66 : 70), 255};
     write(_lcd, &cmdbuf, enabled ? 3 : 2);
 }
@@ -75,6 +78,29 @@ void LCDDisplay::writeLines(std::array<std::string, 4> lines) {
     writeStr(lines[2] + lines[3]);
 }
 
+/* writes string to line buffer at given pos*/
+void LCDDisplay::writeBuf(uint8_t row, uint8_t col, std::string str) {
+    // size_t max_copy = std::min(str.size(), sizeof(linebuf[row]) - col - 1);
+    std::memcpy(&linebuf[row][col], str.c_str(), str.size());  // will overflow
+}
+
+/* hyper optimized buffer flush command, writes whole disp with a single write */
+void LCDDisplay::flushBuffer() {
+    char writebuf[168]; // 4x40 chars + 2x4 setcursor commands + 1 null terminator
+    uint8_t setDisp[] = {254, 71, 1}; // skeleton set cursor command
+
+    std::memcpy(&writebuf[0], setDisp, 3);       // copy template set cursor command
+    writebuf[3] = 1;                             // actual set cursor param, set to 1st row
+    std::memcpy(&writebuf[4], linebuf[0], 40);   // copy 1st line
+    std::memcpy(&writebuf[44], linebuf[1], 40);  // copy 2nd line
+    std::memcpy(&writebuf[84], setDisp, 3);      // copy template set cursor command
+    writebuf[87] = 3;                            // set cursor to 3rd line
+    std::memcpy(&writebuf[88], linebuf[2], 40);  // copy 3rd line
+    std::memcpy(&writebuf[128], linebuf[3], 40); // copy 4th line
+
+    write(_lcd, writebuf, 168);
+}
+
 void LCDDisplay::writeSStream(std::stringstream& ss) {
     std::string s = ss.str();
     if (s.size() != 160)