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MSP432 driverlib 3_21_00_05 RTC fuction issue

1. i want to use MSP432 driverlib in rom to my software,what i want is to implement  1second period interrupt using RTC,but two functions did not excutue correctly,  the result just as following

(1)the driverlib version is 03_21_00_05

(2)the rom version in the slicion is as following(03.00.00.10)

MAP_RTC_C_setPrescaleValue(RTC_C_PRESCALE_0,255);
MAP_RTC_C_setPrescaleValue(RTC_C_PRESCALE_1,128);

the function above did not change the value of the RTC register (as the picture followed,RT0IP and RT1IP remaining no change)

2、when using register directly it excute correctly just as the following picture (RT0IP and RT1IP update correctly)

so did the diriver lib for RTC have bug in it or i used it incorrectly?

if  i am wrong,please teach me how to change RT0IP and  RT1IP correctly using driverlib

thanks

KIssnLiu

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