Differences

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--- le_potato [2023/04/08 22:33] – [Enable UART-A] millerjs
+++ le_potato [2024/11/14 02:30] (current) – external edit 127.0.0.1
@@ Line 15: / Line 15: @@
   - To persist after reboot, merge: ''sudo ldto merge uart-a''
+Somewhat confusingly, both ''uart-a'' and ''uarta'' exist as device tree overlays. ''uarta'' maps to ''uart-a-rts-cts'' which uses pins 16 and 18 for hardware flow control.
 ==== Enable i2c and the DS3231 ====
 Specifically, SDA and SCL pins on GPIOs 3 & 4.
@@ Line 20: / Line 21: @@
   - Clone, build, and install the libretech-wiring-tool as above
   - Install i2c tools: ''sudo apt install i2c-tools''
-  - enable the i2c-ao DTO: ''sudo ldto enable i2c-ao''
+  - Enable the i2c-ao DTO: ''sudo ldto enable i2c-ao''
-  - Check for your devices: ''i2cdetect -y 1''
+  - Check for your devices: ''i2cdetect -y 1'' (DS3231 should be at 0x68)
-  -
+  - Enable for DS3231 on i2c-ao: ''sudo ldto enable i2c-ao-ds3231''
+  - Check dmesg: <code>[ 4024.485534] rtc-ds1307 1-0068: SET TIME!
+[ 4024.488196] rtc-ds1307 1-0068: registered as rtc0
+[ 4024.489394] rtc-ds1307 1-0068: setting system clock to 2000-01-01T01:07:25 UTC (946688845)</code>
+  - Merge to save: ''sudo ldto merge i2c-ao ; sudo ldto merge i2c-ao-ds3231''