Forum Post: RE: UART registers access problems

Hi Marco,

Please take a look at chapter 8 of the AM335x TRM. You need to enable the clock to the specific peripheral to be able to access the registers.  For example, see 8.1.12 Clock Module Registers and for Uart1, see 8.1.12.1.21 CM_PER_UART1_CLKCTRL Register (offset = 6Ch) [reset = 30000h].