chuniio: Add OpenITHM LED protocol support

chuniio/chuniio.c

@@ -19,6 +19,7 @@ static uint8_t chuni_io_hand_pos;
 static HANDLE chuni_io_slider_thread;
 static bool chuni_io_slider_stop_flag;
 static struct chuni_io_config chuni_io_cfg;
+static HANDLE chuni_io_slider_led_port;
 
 uint16_t chuni_io_get_api_version(void)
 {
@@ -121,6 +122,38 @@ void chuni_io_slider_start(chuni_io_slider_callback_t callback)
             callback,
             0,
             NULL);
+
+    chuni_io_slider_led_port = CreateFileW(chuni_io_cfg.led_com,
+            GENERIC_READ | GENERIC_WRITE,
+            0,
+            NULL,
+            OPEN_EXISTING,
+            0,
+            NULL);
+    
+    if (chuni_io_slider_led_port == INVALID_HANDLE_VALUE)
+        dprintf("OpenITHM LEDs: Failed to open COM port (Attempted on %S)\n", chuni_io_cfg.led_com);
+    else
+        dprintf("OpenITHM LEDs: COM Port Success!\n");
+            
+    DCB dcb_serial_params = { 0 };
+    dcb_serial_params.DCBlength = sizeof(dcb_serial_params);
+    status = GetCommState(chuni_io_slider_led_port, &dcb_serial_params);
+    
+    dcb_serial_params.BaudRate = CBR_115200;  // Setting BaudRate = 115200
+    dcb_serial_params.ByteSize = 8;         // Setting ByteSize = 8
+    dcb_serial_params.StopBits = ONESTOPBIT;// Setting StopBits = 1
+    dcb_serial_params.Parity   = NOPARITY;  // Setting Parity = None
+    SetCommState(chuni_io_slider_led_port, &dcb_serial_params);
+    
+    COMMTIMEOUTS timeouts = { 0 };
+    timeouts.ReadIntervalTimeout         = 50; // in milliseconds
+    timeouts.ReadTotalTimeoutConstant    = 50; // in milliseconds
+    timeouts.ReadTotalTimeoutMultiplier  = 10; // in milliseconds
+    timeouts.WriteTotalTimeoutConstant   = 50; // in milliseconds
+    timeouts.WriteTotalTimeoutMultiplier = 10; // in milliseconds
+    
+    SetCommTimeouts(chuni_io_slider_led_port, &timeouts);
 }
 
 void chuni_io_slider_stop(void)
@@ -135,11 +168,34 @@ void chuni_io_slider_stop(void)
     CloseHandle(chuni_io_slider_thread);
     chuni_io_slider_thread = NULL;
     chuni_io_slider_stop_flag = false;
+
+    dprintf("OpenITHM LEDs: Closing COM port\n");
+    CloseHandle(chuni_io_slider_led_port);
 }
 
 void chuni_io_slider_set_leds(const uint8_t *rgb)
 {
     led_output_update(2, rgb);
+     if (chuni_io_slider_led_port != INVALID_HANDLE_VALUE)
+    {
+        char led_buffer[100];
+        DWORD bytes_to_write;         // No of bytes to write into the port
+        DWORD bytes_written = 0;     // No of bytes written to the port
+        bytes_to_write = sizeof(led_buffer);
+        BOOL status;
+        
+        led_buffer[0] = 0xAA;
+        led_buffer[1] = 0xAA;
+        memcpy(led_buffer+2, rgb, sizeof(uint8_t) * 96);
+        led_buffer[98] = 0xDD;
+        led_buffer[99] = 0xDD;
+        
+        status = WriteFile(chuni_io_slider_led_port,        // Handle to the Serial port
+                           led_buffer,     // Data to be written to the port
+                           bytes_to_write,  //No of bytes to write
+                           &bytes_written, //Bytes written
+                           NULL);
+    }
 }
 
 static unsigned int __stdcall chuni_io_slider_thread_proc(void *ctx)

chuniio/chuniio.h

@@ -139,9 +139,10 @@ void chuni_io_slider_start(chuni_io_slider_callback_t callback);
 void chuni_io_slider_stop(void);
 
 /* Update the RGB lighting on the slider. A pointer to an array of 32 * 3 = 96
-   bytes is supplied. The illuminated areas on the touch slider are some
-   combination of rectangular regions and dividing lines between these regions
-   but the exact mapping of this lighting control buffer is still TBD.
+  bytes is supplied, organized in BRG format.
+   The first set of bytes is the right-most slider key, and from there the bytes
+   alternate between the dividers and the keys until the left-most key. 
+   There are 31 illuminated sections in total.
 
    Minimum API version: 0x0100 */
 

chuniio/config.c

@@ -57,6 +57,10 @@ void chuni_io_config_load(
                 filename);
     }
 
+    GetPrivateProfileStringW(L"slider", L"ledport", L"COM5", port_input, 6, filename);
+    wcsncpy(cfg->led_com, L"\\\\.\\", 4);
+    wcsncat_s(cfg->led_com, 11, port_input, 6);
+
     cfg->cab_led_output_pipe = GetPrivateProfileIntW(L"led", L"cabLedOutputPipe", 1, filename);
     cfg->cab_led_output_serial = GetPrivateProfileIntW(L"led", L"cabLedOutputSerial", 0, filename);
     

chuniio/config.h

@@ -10,6 +10,7 @@ struct chuni_io_config {
     uint8_t vk_ir_emu;
     uint8_t vk_ir[6];
     uint8_t vk_cell[32];
+    wchar_t led_com[12];
 
     // Which ways to output LED information are enabled
     bool cab_led_output_pipe;

chuniio/meson.build

@@ -4,6 +4,10 @@ chuniio_lib = static_library(
     include_directories : inc,
     implicit_include_directories : false,
     c_pch : '../precompiled.h',
+    link_with : [
+        util_lib
+    ],
+
     sources : [
         'chu2to3.c',
         'chu2to3.h',