mu3: added lights hook

mu3io/serialimpl.c

@@ -0,0 +1,88 @@
+#include <windows.h>
+
+#include <process.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "mu3io/leddata.h"
+#include "mu3io/serialimpl.h"
+
+#include "util/dprintf.h"
+
+static HANDLE mu3_serial_port;
+
+HRESULT mu3_led_serial_init(wchar_t led_com[12], DWORD baud)
+{
+    // Setup the serial communications
+    BOOL status;
+
+    mu3_serial_port = CreateFileW(led_com,
+            GENERIC_READ | GENERIC_WRITE,
+            0,
+            NULL,
+            OPEN_EXISTING,
+            0,
+            NULL);
+    
+    if (mu3_serial_port == INVALID_HANDLE_VALUE)
+    {
+        dprintf("Ongeki Serial LEDs: Failed to open COM port (attempted on %S)\n", led_com);
+        return E_FAIL;
+    }
+            
+    DCB dcb_serial_params = { 0 };
+    dcb_serial_params.DCBlength = sizeof(dcb_serial_params);
+    status = GetCommState(mu3_serial_port, &dcb_serial_params);
+    
+    dcb_serial_params.BaudRate = baud;
+    dcb_serial_params.ByteSize = 8;
+    dcb_serial_params.StopBits = ONESTOPBIT;
+    dcb_serial_params.Parity   = NOPARITY; 
+    SetCommState(mu3_serial_port, &dcb_serial_params);
+    
+    COMMTIMEOUTS timeouts = { 0 };
+    timeouts.ReadIntervalTimeout         = 50;
+    timeouts.ReadTotalTimeoutConstant    = 50; 
+    timeouts.ReadTotalTimeoutMultiplier  = 10;
+    timeouts.WriteTotalTimeoutConstant   = 50;
+    timeouts.WriteTotalTimeoutMultiplier = 10;
+    
+    SetCommTimeouts(mu3_serial_port, &timeouts);
+
+    if (!status)
+    {
+        return E_FAIL;
+    }
+
+    return S_OK;
+}
+
+void mu3_led_serial_update(struct _ongeki_led_data_buf_t* data)
+{
+    if (data->board > 1)
+    {
+        return;
+    }
+
+    if (mu3_serial_port != INVALID_HANDLE_VALUE) 
+    {
+        DWORD bytes_written = 0;
+
+        BOOL status = WriteFile(
+            mu3_serial_port, 
+            data, 
+            LED_OUTPUT_HEADER_SIZE + data->data_len, 
+            &bytes_written, 
+            NULL);
+
+        if (!status) 
+        {
+            DWORD last_err = GetLastError();
+            dprintf("Ongeki Serial LEDs: Serial port write failed -- %d\n", (int) last_err); 
+        }
+    } 
+    else 
+    {
+        dprintf("Ongeki Serial LEDs: Invalid serial port handle\n"); 
+    }
+}