Add basic thermal printer control

src/ltp1245.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#include <stdbool.h>
+
+#include "stm32f1xx.h"
+
+typedef int (*LTP1245_DataProvider_t)(uint8_t *buffer);
+
+#define LTP1245_MAX_DRIVE_FREQ  473     // In Hz
+#define LTP1245_BUFFER_LINES    64
+
+#define LTP1245_TH_REXT         10      // In kΩ
+
+void LTP1245_Init(void);