serial port works, added setup instructions

[rpikern] / README.md

diff --git a/README.md b/README.md
new file mode 100644 (file)
index 0000000..4aaf984
--- /dev/null
+++ b/README.md
@@ -0,0 +1,21 @@
+RPi Configuration
+-----------------
+In `config.txt`:
+    init_uart_clock=3000000
+    enable_uart=1
+    core_freq=250
+
+netboot with uboot
+------------------
+Put `rpikern.bin` in `/srv/tftp/`  (`make install`)
+
+Once:
+    setenv serverip 192.168.0.4
+    setenv ipaddr 192.168.0.25
+    saveenv
+
+Then:
+    tftpboot 0x8000 rpikern.bin
+    go 0x8000
+
+TODO: make it automatic with a boot script