Software timer

#define LOS_ERRNO_SWTMR_TICK_PTR_NULL   LOS_ERRNO_OS_ERROR(LOS_MOD_SWTMR, 0x10) Software timer error code: The passed-in number of remaining Ticks configured on the software timer is NULL. Value: 0x02000310 Solution: Define a variable of the number of remaining Ticks before passing in the number of remaining Ticks. 在文件los_swtmr.h第216行定义。