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                       IRTIM configuration functions
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                       IRTIM Driver: how to use it
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       To generate the infrared remote control signal, perform the following steps:
          1. Use TIM2 channel 1 to generate the high frequency carrier signal
             by calling TIM2_OC1Init()
          2. Use TIM3 channel 1 to generate the modulation envelope by
             calling TIM3_OC1Init()
          3. Enable the IRTIM peripheral using IRTIM_Cmd()

          Note1: When IRTIM peripheral is enabled, TIM2 channel 1 and TIM3 channel 1
                 become inactive (no signal on output) and can be used as GPIO.
                 
          Note2: The high sink LED driver capability (only available on the IRTIM pin)
                 can be activated using IRTIM_HighSinkODCmd() to sink the high 
                 current needed to directly control an infrared LED