Support actual DPI values for the M719

examples/example_m719.ini

@@ -25,15 +25,15 @@ dpi2_enable=1
 dpi3_enable=1
 dpi4_enable=1
 dpi5_enable=0
-# There is only one implemented format to specify the DPI:
-# 1. raw bytecode: 0x[04-8c][00-01]
-# Note: specifying the actual DPI is unsupported due to a lack of information
+# There are two formats to specify the DPI:
+# 1. actual DPI: 100-10000 (resolution is 100 (100-5000) or 200 (5200-10000))
+# 2. raw bytecode: 0x[04-8c][00-01]
 # Note: the older DPI format (04-8c) is no longer supported.
-dpi1=0x0400
-dpi2=0x1600
-dpi3=0x2d00
-dpi4=0x4300
-dpi5=0x8c00
+dpi1=200
+dpi2=1000
+dpi3=2000
+dpi4=3000
+dpi5=5000
 
 # usb report rate (125, 250, 500, 1000) Hz
 report_rate=500

include/m719/data.cpp

@@ -41,6 +41,85 @@ std::map< int, std::string > mouse_m719::_c_button_names = {
 	{ 8, "scroll_up" },
 	{ 9, "scroll_down" } };
 
+// Mapping of real DPI values to bytecode
+std::map< unsigned int, std::array<uint8_t, 2> > mouse_m719::_c_dpi_codes = {
+	{ 100, {0x02, 0x00} },
+	{ 200, {0x04, 0x00} },
+	{ 300, {0x06, 0x00} },
+	{ 400, {0x08, 0x00} },
+	{ 500, {0x0b, 0x00} },
+	{ 600, {0x0d, 0x00} },
+	{ 700, {0x0f, 0x00} },
+	{ 800, {0x12, 0x00} },
+	{ 900, {0x14, 0x00} },
+	{ 1000, {0x16, 0x00} },
+	{ 1100, {0x19, 0x00} },
+	{ 1200, {0x1b, 0x00} },
+	{ 1300, {0x1d, 0x00} },
+	{ 1400, {0x20, 0x00} },
+	{ 1500, {0x22, 0x00} },
+	{ 1600, {0x24, 0x00} },
+	{ 1700, {0x27, 0x00} },
+	{ 1800, {0x29, 0x00} },
+	{ 1900, {0x2b, 0x00} },
+	{ 2000, {0x2e, 0x00} },
+	{ 2100, {0x30, 0x00} },
+	{ 2200, {0x32, 0x00} },
+	{ 2300, {0x34, 0x00} },
+	{ 2400, {0x37, 0x00} },
+	{ 2500, {0x39, 0x00} },
+	{ 2600, {0x3b, 0x00} },
+	{ 2700, {0x3e, 0x00} },
+	{ 2800, {0x40, 0x00} },
+	{ 2900, {0x42, 0x00} },
+	{ 3000, {0x45, 0x00} },
+	{ 3100, {0x47, 0x00} },
+	{ 3200, {0x49, 0x00} },
+	{ 3300, {0x4c, 0x00} },
+	{ 3400, {0x4e, 0x00} },
+	{ 3500, {0x50, 0x00} },
+	{ 3600, {0x53, 0x00} },
+	{ 3700, {0x55, 0x00} },
+	{ 3800, {0x57, 0x00} },
+	{ 3900, {0x5a, 0x00} },
+	{ 4000, {0x5c, 0x00} },
+	{ 4100, {0x5e, 0x00} },
+	{ 4200, {0x61, 0x00} },
+	{ 4300, {0x63, 0x00} },
+	{ 4400, {0x65, 0x00} },
+	{ 4500, {0x68, 0x00} },
+	{ 4600, {0x6a, 0x00} },
+	{ 4700, {0x6c, 0x00} },
+	{ 4800, {0x6f, 0x00} },
+	{ 4900, {0x71, 0x00} },
+	{ 5000, {0x73, 0x00} },
+	{ 5200, {0x3b, 0x01} },
+	{ 5400, {0x3e, 0x01} },
+	{ 5600, {0x40, 0x01} },
+	{ 5800, {0x42, 0x01} },
+	{ 6000, {0x45, 0x01} },
+	{ 6200, {0x47, 0x01} },
+	{ 6400, {0x49, 0x01} },
+	{ 6600, {0x4c, 0x01} },
+	{ 6800, {0x4e, 0x01} },
+	{ 7000, {0x50, 0x01} },
+	{ 7200, {0x53, 0x01} },
+	{ 7400, {0x55, 0x01} },
+	{ 7600, {0x57, 0x01} },
+	{ 7800, {0x5a, 0x01} },
+	{ 8000, {0x5c, 0x01} },
+	{ 8200, {0x5e, 0x01} },
+	{ 8400, {0x61, 0x01} },
+	{ 8600, {0x63, 0x01} },
+	{ 8800, {0x65, 0x01} },
+	{ 9000, {0x68, 0x01} },
+	{ 9200, {0x6a, 0x01} },
+	{ 9400, {0x6c, 0x01} },
+	{ 9600, {0x6f, 0x01} },
+	{ 9800, {0x71, 0x01} },
+	{ 10000, {0x73, 0x01} }
+};
+
 //usb data packets
 uint8_t mouse_m719::_c_data_s_profile[6][16] = {
 	{0x02, 0xf3, 0x2c, 0x00, 0x02, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},

include/m719/helpers.cpp

@@ -156,3 +156,28 @@ int mouse_m719::print_settings( std::ostream& output ){
 	
 	return 0;
 }
+
+int mouse_m719::_i_decode_dpi( std::array<uint8_t, 2>& dpi_bytes, std::string& dpi_string ){
+	
+	// is dpi value known?
+	for( auto dpi_value : _c_dpi_codes ){
+		
+		if( dpi_value.second[0] == dpi_bytes[0] && dpi_value.second[1] == dpi_bytes[1] ){
+			dpi_string = std::to_string( dpi_value.first );
+			return 0;
+		}
+		
+	}
+	
+	// unknown dpi value
+	std::stringstream conversion_stream;
+	
+	conversion_stream << std::setfill('0') << std::hex;
+	conversion_stream << "0x";
+	conversion_stream << std::setw(2) << (int)dpi_bytes[0] << std::setw(2) << (int)dpi_bytes[1];
+	conversion_stream << std::setfill(' ') << std::setw(0) << std::dec;
+	
+	dpi_string = conversion_stream.str();
+	
+	return 0;
+}

include/m719/mouse_m719.h

@@ -259,6 +259,9 @@ class mouse_m719 : public rd_mouse{
 		/// Names of the physical buttons
 		static std::map< int, std::string > _c_button_names;
 
+		/// Mapping of real DPI values to bytecode
+		static std::map< unsigned int, std::array<uint8_t, 2> > _c_dpi_codes;
+
 		/// The model name
 		static const std::string _c_name;
 
@@ -307,6 +310,12 @@ class mouse_m719 : public rd_mouse{
 		static uint8_t _c_data_read_2[85][64];
 		/// Used to read the settings, part 3/3 
 		static uint8_t _c_data_read_3[46][16];
+
+		/** Convert raw dpi bytes to a string representation (doesn't validate dpi value)
+		 * This function overloads the implementation from rd_mouse and supports actual DPI values.
+		 * \return 0 if no error
+		 */
+		static int _i_decode_dpi( std::array<uint8_t, 2>& dpi_bytes, std::string& dpi_string );
 };
 
 #endif

include/m719/setters.cpp

@@ -118,6 +118,19 @@ int mouse_m719::set_dpi( rd_profile profile, int level, std::string dpi ){
 		
 	}
 
+	// check format: 1234 (real DPI)
+	else if( std::regex_match( dpi, std::regex("[[:digit:]]+") ) ){
+		
+		if( _c_dpi_codes.find( std::stoi(dpi) ) != _c_dpi_codes.end() ){
+			
+			_s_dpi_levels[profile][level][0] = _c_dpi_codes.at( std::stoi(dpi) )[0];
+			_s_dpi_levels[profile][level][1] = _c_dpi_codes.at( std::stoi(dpi) )[1];
+			
+			return 0;
+		}
+		
+	}
+	
 	return 1;
 }