X-Git-Url: http://git.rot13.org/?p=trilby-hat-fpga;a=blobdiff_plain;f=README.md;h=911bf1b9afcaaaa3401700792ef01f93fed2d044;hp=293910d0d2b298983cbb1ba772d307b00db2256a;hb=58bceedf42216dc01a8920bc2bb4baa43e0f1333;hpb=0d59486af5cf1f64018416e522e651655a734ce8

diff --git a/README.md b/README.md
index 293910d..911bf1b 100644
--- a/README.md
+++ b/README.md
@@ -1,11 +1,31 @@
 # Trilby HAT ECP5 45k FPGA
 
+http://www.kinetic.co.uk/Trilby.php
+
 This is my attempt at using open source tools to generate bitstream
 
 Run `make prog` to load the example to the board.
 
+
+## enable RTC
+
+Add to config.txt:
+
+```
+dtoverlay=i2c-rtc,ds1307
+```
+
+or execute in shell:
+
+```
+echo ds1307 0x68 > /sys/class/i2c-adapter/i2c-1/new_device
+```
+
+
 ## read HAT ID eeprom
 
 Add to config.txt:
 
+```
 dtoverlay=i2c-gpio,i2c_gpio_sda=0,i2c_gpio_scl=1,bus=4
+```