read HAT ID eeprom

[trilby-hat-fpga] / README.md

diff --git a/README.md b/README.md
index 9faaed2..293910d 100644 (file)
--- a/README.md
+++ b/README.md
@@ -1,4 +1,11 @@
 # Trilby HAT ECP5 45k FPGA
 
+This is my attempt at using open source tools to generate bitstream
+
 Run `make prog` to load the example to the board.
 
+## read HAT ID eeprom
+
+Add to config.txt:
+
+dtoverlay=i2c-gpio,i2c_gpio_sda=0,i2c_gpio_scl=1,bus=4