From b832903565598e2f144e2e421c9f8307b7c4b96b Mon Sep 17 00:00:00 2001
From: Nathaniel Wesley Filardo <nwf@cs.jhu.edu>
Date: Sat, 29 Jul 2017 16:16:51 -0400
Subject: [PATCH] i2c utilities

---
 util/i2cu.lua | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 util/i2cu.lua

diff --git a/util/i2cu.lua b/util/i2cu.lua
new file mode 100644
index 0000000..a7e3fd9
--- /dev/null
+++ b/util/i2cu.lua
@@ -0,0 +1,19 @@
+local self = {}
+
+function self.readn(addr, len)
+  i2c.start(0)
+  if not i2c.address(0, addr, i2c.RECEIVER) then i2c.stop(0) return nil end
+  local v = i2c.read(0, len)
+  i2c.stop(0)
+  return v
+end
+
+function self.writen(addr, ...)
+  i2c.start(0)
+  if not i2c.address(0, addr, i2c.TRANSMITTER) then i2c.stop(0) return nil end
+  i2c.write(0, ...)
+  i2c.stop(0)
+  return true
+end
+
+return self
-- 
2.50.1