read_bytes, and read_byte.

nixpulvis · Oct 11, 2015 · 5ccaf23 · 5ccaf23
1 parent ebad4e1
commit 5ccaf23
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Showing 2 changed files with 14 additions and 3 deletions.
diff --git a/lib/avrm/i2c.c b/lib/avrm/i2c.c
@@ -52,13 +52,21 @@ void i2c_write(byte data){
   return;
 }
 
-int i2c_read_register(byte addr, byte rgstr, byte *buf, size_t len)
+byte i2c_read_register_byte(byte addr, byte rgstr)
+{
+  byte ret;
+  i2c_read_register_bytes(addr, rgstr, &ret, 1);
+  return ret;
+}
+
+int i2c_read_register_bytes(byte addr, byte rgstr, byte *buf, size_t len)
 {
   i2c_start(addr, I2C_WRITE);
   i2c_write(rgstr);
   i2c_start(addr, I2C_READ);
   for (int i = 0; i < len; i++)
     buf[i] = i2c_read_ack();
+  i2c_stop();
 
   // TODO: Errors?
   return 0;

diff --git a/lib/avrm/i2c.h b/lib/avrm/i2c.h
@@ -24,8 +24,11 @@ byte i2c_start(byte address, byte config);
 // i2c_write
 void i2c_write(byte data);
 
-// i2c_read_address
-int i2c_read_register(byte address, byte register, byte *buffer, size_t length);
+// i2c_read_register_byte
+byte i2c_read_register_byte(byte addr, byte rgstr);
+
+// i2c_read_register_bytes
+int i2c_read_register_bytes(byte address, byte register, byte *buffer, size_t length);
 
 // i2c_read_ack
 byte i2c_read_ack(void);