Diff: i2c_functions.h

Revision:

2:7d005ac4146f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/i2c_functions.h	Fri Apr 12 06:56:27 2019 +0000
@@ -0,0 +1,58 @@
+#ifndef __I2C_FUNCTIONS_H__
+#define __I2C_FUNCTIONS_H__
+
+#include "mbed.h"
+
+/* 
+ ***************************************************************************************
+ *
+ *  Functions for I2C Communication
+ *
+ ***************************************************************************************
+ */
+
+static I2C i2c(P2_6,P2_7);
+
+static int i2c_freq (int freqHz )
+{
+    i2c.frequency(freqHz);
+}
+
+static int i2c_write (uint8_t i2c_addr, uint8_t register_addr, char* buffer, uint8_t Nbyte )
+{
+    int ret;
+    char *tmp_buffer;
+        
+    tmp_buffer = (char*)malloc(sizeof(char)*(Nbyte+1));
+        
+    /* First, send device address. Then, send data and STOP condition */
+    tmp_buffer[0] = register_addr;
+    memcpy(tmp_buffer+1, buffer, Nbyte);
+
+    ret = i2c.write(i2c_addr, tmp_buffer, Nbyte+1, false);
+
+    return ret;
+}
+
+static int i2c_read (uint8_t i2c_addr, uint8_t register_addr, char* buffer, uint8_t Nbyte )
+{
+    int ret;
+    
+    /* Send device address, with no STOP condition */
+    ret = i2c.write(i2c_addr, (const char*)&register_addr, 1, true);
+    if(!ret) {
+        /* Read data, with STOP condition  */
+        ret = i2c.read((i2c_addr|0x01), buffer, Nbyte, false);        
+    }
+
+    return ret;
+}
+
+/* 
+ ***************************************************************************************
+ *
+ *  Functions for ....
+ *
+ ***************************************************************************************
+ */
+ #endif
\ No newline at end of file