On 05/28/2014 03:42 PM, Charles Steinkuehler wrote:
On 5/28/2014 5:09 PM, Ross Morrison wrote:
On 05/28/2014 02:43 PM, Charles Steinkuehler wrote:
On 5/28/2014 4:41 PM, Ross Morrison wrote:
Hi all,
Quick question, what reference should I look to for answers for the
values that are used in .dts file for pin muxing?
For example:
<snip>
You want the AM335x Technical Reference Manual from TI, typically
referred to here as the TRM.
Have it, been looking through it (all 4700 pages), any particular section?
The Control Module (Section 9), specifically 9.3.1 "Control Module
Registers" and 9.3.1.50 "conf_<module>_<pin> Register" document the pin
mux registers.
Does this sound right:
L16 set for UART3_TX 0x0138 0x81 /* uart3_txd mode 1 */
L17 set for UART3_RX 0x0134 0x81 /* uart3_rxd mode 1 */
If you want to know what data to put into the pin mux registers, you
need to refer to Section 2.2 and Table 2.7 of the data sheet, "Ball
Characteristics". This lists the physical pin characteristics and the
various legal mode settings.
Got it, did have the pin mux wrong, should be 0x09 for the tx and 0x29
for the rx lines.
Thanks,
Ross
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