Hello,
I'm going through the iMX8MM Cortex-M4 SDK examples. For the GPIO example, the BOARD_RdcInit() function calls CLOCK_EnableClock() function after configuring the RDC (ressource domain controller).
The first call to CLOCK_EnableClock() is with parameter 'kCLOCK_Iomux', which in turn is a tuple with the values (27U, 33U). Now, by examining the enable clock function, I can verify that the CCM_CCGR register #27 is written, which is the gate register for IOMUX.
However, I'm struggling with the value 33 defining the corresponding root clock. According to table 5-2. "System Clocks and Gating" of the iMX8M Mini reference manual, the IOMUX root clock is IPG_CLK_ROOT, but I can't find this clock in Table 5-1. "Clock Root Table" for which I assume the "slice index n" column equals the root clock number.
I'm pretty sure that I'm interpreting the values correctly: using the tuple for I2C1 (23U, 90U) as an example shows the correct values in table 5.1 and table 5.2.
So, my question is if:
1) table 5.1 "Clock Root Table" of the reference manual is incomplete OR
2) the SDK header file uses wrong values OR
3) my interpretation is wrong
I hope someone can clarify
Regards
