[Home] [Cat] [About] [Syntax] [Scraps]

[millerjs.org]

Differences

This shows you the differences between two versions of the page.

--- le_potato [2023/04/08 22:32] – [Enable i2c and the DS3231] millerjs
+++ le_potato [2024/11/14 02:30] (current) – external edit 127.0.0.1
@@ Line 10: / Line 10: @@
   - Clone, build, and install the libretech-wiring-tool
-  - Enable the DTO for UART-A <code>
+  - Enable the DTO for UART-A ''sudo ldto enable uart-a''
-sudo ldto enable uart-a
+  - Check dmesg ''c11084c0.serial: ttyAML6 at MMIO 0xc11084c0 (irq = 49, base_baud = 1500000) is a meson_uart''
-</code>
-  - Check dmesg <code>c11084c0.serial: ttyAML6 at MMIO 0xc11084c0 (irq = 49, base_baud = 1500000) is a meson_uart</code>
   - Test with ''minicom'' or whatever
-  - To persist after reboot, merge: <code>sudo ldto merge uart-a</code>
+  - 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 22: / 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''

[Home] [Cat] [About] [Syntax] [Scraps] [millerjs.org]

Differences

[Home] [Cat] [About] [Syntax] [Scraps]

[millerjs.org]