The situation can not be met or can not calculate floating-point numbers floating point printf in the use of LPC55S69, because Sparklers (Option for target)
configuration is not configured, only needs to define in C / C ++ (AC6) in Add the following statement to
DEBUG, CPU_LPC55S69JBD100_cm33_core0, ARM_MATH_CM33, PRINTF_FLOAT_ENABLE=1, PRINTF_ADVANCED_ENABLE=1