@brief Ancillary function to sprintf on ENG format @ingroup frontend
@param buf buffer to store the value @param len buffer length @param val value to be printed
On ENG notation, the exponential value should be multiple of 3. This is good to display some values, like BER.
@return At return, it shows the actual size of the print. A negative value indicates an error.
See Implementation
@brief Ancillary function to sprintf on ENG format @ingroup frontend
@param buf buffer to store the value @param len buffer length @param val value to be printed
On ENG notation, the exponential value should be multiple of 3. This is good to display some values, like BER.
@return At return, it shows the actual size of the print. A negative value indicates an error.