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diff --git a/macros/Hardware/RasberryPi/RPI_HardPWMWrite.sci b/macros/Hardware/RasberryPi/RPI_HardPWMWrite.sci
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+// This file must be used under the terms of the CeCILL.
+// This source file is licensed as described in the file COPYING, which
+// you should have received as part of this distribution.  The terms
+// are also available at
+// http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
+// Organization: FOSSEE, IIT Bombay
+// Email: toolbox@scilab.in
+
+function RPI_HardPWMWrite(pin,value)
+// Function to change pwm duty on specified pin. Hardware PWM is available 
+// only on pin 12. So, only '12' should be provided as pin 
+//
+// Calling Sequence
+//	   RPI_HardPWMWrite(12,512) //Value must be smaller than the range set
+//									using RPI_HARDPWMSetRange
+//
+// Parameters
+//		pin: pin no on which pwm value is to be changed. Currently only 12 is allowed
+//		value: pwm value for given pin. This must be less than range value set 
+// Description
+//		This function changes pwm duty on specified pin. As for RPi, only one pin 
+//		(pin 12) is available for hardware PWM. 
+//		PWM frequency = (PWM Clock frequency/Clock divisor/range) 
+//				PWM clock frequency = 19.2 MHz
+//				clock divisor is setup using RPI_HardPWMSetClock
+//				range is setup using RPI_HardPWMSetRange 
+//		Actual PWM duty = value/range
+// Examples
+//	
+// See also
+//     RPI_HardPWMSetClock RPI_HardPWMSetRange
+//
+// Authors
+//     Siddhesh Wani
+// -----------------------------------------------------------------
+
+// This is curretly dummy function. It provides no functionality but is required 
+// for providing support for generating C code for RPi.
+endfunction