Initial attempt at serial port support.

CMakeLists.txt

@@ -17,6 +17,10 @@ message("that you are resting well.")
 message(" -- Your friend, Stephanie")
 message("******************************")
 
+if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+	add_compile_definitions(EMU_DEBUG=1)
+endif()
+
 # Main project sources
 add_subdirectory(src)
 

include/dbvzRegisterAccessors.c.h

@@ -710,6 +710,7 @@ static void setUstcnt2(uint16_t value){
 
    registerArrayWrite16(USTCNT2, value);
    updateUart2Interrupt();
+   updateUart2PortState();
 }
 
 static void setTstat1(uint16_t value){

include/dbvzTiming.c.h

@@ -404,6 +404,9 @@ static void dbvzEndClk32(void){
    updateUart1Interrupt();
    updateUart2Interrupt();
 
+   updateUart1PortState();
+   updateUart2PortState();
+
    checkInterrupts();
 }
 

include/emulator.h

@@ -109,7 +109,7 @@ enum{
 };
 
 //types
-typedef struct{
+typedef struct {
    bool     enable;
    bool     enableParity;
    bool     oddParity;
@@ -215,7 +215,11 @@ extern void      (*palmSerialDataFlush)(void);//called by the emulator to delete
 extern void      (*palmGetRtcFromHost)(uint8_t* writeBack);//[0] = hours, [1] = minutes, [2] = seconds
 
 //functions
-uint32_t emulatorInit(uint8_t emulatedDevice, uint8_t* palmRomData, uint32_t palmRomSize, uint8_t* palmBootloaderData, uint32_t palmBootloaderSize, bool syncRtc, bool allowInvalidBehavior);
+uint32_t emulatorInit(uint8_t emulatedDevice, uint8_t *palmRomData,
+                      uint32_t palmRomSize, uint8_t *palmBootloaderData,
+                      uint32_t palmBootloaderSize, bool syncRtc,
+                      bool allowInvalidBehavior, const char *serialPortDev);
+
 void emulatorDeinit(void);
 void emulatorHardReset(void);
 void emulatorSoftReset(void);

include/serial.h

@@ -0,0 +1,18 @@
+//
+// Created by stephanie on 6/14/24.
+//
+
+#ifndef MU_SERIAL_H
+#define MU_SERIAL_H
+
+#include "emulator.h"
+
+/**
+ * Opens and initializes the serial port.
+ *
+ * @param path The path of the serial port.
+ * @since 2024/06/14
+ */
+void mu_serial_open_and_init(const char* path);
+
+#endif // MU_SERIAL_H

libretroBuildSystem/CMakeLists.txt

@@ -14,6 +14,10 @@ add_library(mu_libretro SHARED
 # Remove the "lib" prefix always, RetroArch does not name in this way
 set_target_properties(mu_libretro PROPERTIES PREFIX "")
 
+# Define these
+target_compile_definitions(mu_libretro PUBLIC
+	__LIBRETRO__=1)
+
 # Bring all the sub-modules as needed
 target_link_libraries(mu_libretro
 	MuCore)