Diff: FM24Vxx_I2C.cpp

Revision:

1:6a16bddd7222

Parent:

0:fa858f79d48d

Child:

2:bf7d1264d3ff

--- a/FM24Vxx_I2C.cpp	Sat Mar 23 15:54:01 2013 +0000
+++ b/FM24Vxx_I2C.cpp	Wed Apr 03 12:51:20 2013 +0000
@@ -57,6 +57,9 @@
         // Retrieve device identifiers
         _deviceID = NULL;
         GetDevideIDs();
+        
+        _sn = NULL;
+        GetSerialNumbers();
     
         DEBUG_LEAVE("CFM24VXX_I2C")
     }
@@ -94,10 +97,75 @@
         return false;
     }
 
-    void CFM24VXX_I2C::GetDevideIDs() {
-        _deviceID = new CFM24VXX_IDs(0x00, 0x00, 0x00);
+    bool CFM24VXX_I2C::GetDevideIDs() {
+         DEBUG_ENTER("CFM24VXX_I2C::GetDevideIDs")
+    
+        // 1. Memory address
+        char i2cBuffer[1];
+        i2cBuffer[0] = (unsigned char)(_slaveAddress & 0xfc); //FIXME Change 0xfc into a const SET_PAGE_SELECT_0
+        DEBUG("CFM24VXX_I2C::GetDevideIDs: pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+        // 2. Send I2C start + 0xF8 + I2C ReStart
+       if (_i2cInstance->write(0xf8, i2cBuffer, 1, true) == 0) {
+            wait(0.02);
+            DEBUG("CFM24VXX_I2C::GetDevideIDs: Write F8 done")
+            // 3. read data + I2C stop
+            unsigned char buffer[3];
+            int result = _i2cInstance->read(0xf9, (char *)buffer, 3);
+            wait(0.02);
+            if (result == 0) {
+                // 4. Setup the device IDs
+                _deviceID = new CFM24VXX_IDs(buffer[0], buffer[1], buffer[2]);
+                DEBUG("CFM24VXX_I2C::GetDevideIDs: %02x - %02x - %02x", buffer[0], buffer[1], buffer[2])
+   
+                DEBUG_LEAVE("CFM24VXX_I2C::GetDevideIDs: %x", (bool)(result == 0))
+                return (bool)(result == 0);
+            }
+        }
+    
+        _deviceID = new CFM24VXX_IDs(0xff, 0xff, 0xff);
+        DEBUG_LEAVE("CFM24VXX_I2C::GetDevideIDs (false)")
+        return false;
     }
 
+    bool CFM24VXX_I2C::GetSerialNumbers() {
+        DEBUG_ENTER("CFM24VXX_I2C::GetSerialNumber")
+        // 1. Memory address
+        char i2cBuffer[1];
+        i2cBuffer[0] = (unsigned char)(_slaveAddress & 0xfc); //FIXME Change 0xfc into a const SET_PAGE_SELECT_0
+        DEBUG("CFM24VXX_I2C::GetSerialNumber: pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+        // 2. Send I2C start + 0xF8 + I2C ReStart
+       if (_i2cInstance->write(0xf8, i2cBuffer, 1, true) == 0) {
+            wait(0.02);
+            DEBUG("CFM24VXX_I2C::GetSerialNumber: Write F8 done")
+            // 3. read data + I2C stop
+            unsigned char buffer[8]; // See FM24V10_ds.pdf Page 10/16 Figure 15. 8-Byte Serial Number (read-only)
+            int result = _i2cInstance->read(0xcd, (char *)buffer, 8);
+            wait(0.02);
+            if (result == 0) {
+                // 4. Check if it is supported
+                if (buffer[7] != 0x00) { // SN supported
+                    // 5. Compute CRC
+                    unsigned char crc = ChecksumSN(buffer);
+                    // 6. Check CRCs
+                    if (buffer[7] == crc) {
+                        _sn = new CFM24VXX_SN(buffer);
+                        DEBUG_LEAVE("CFM24VXX_I2C::GetSerialNumber: true")
+                        return true;
+                     } else { // SN supported
+                        DEBUG_LEAVE("CFM24VXX_I2C::GetSerialNumber: Checksum mismatch")
+                        return false;
+                     }
+               } else { // SN supported
+                    DEBUG_LEAVE("CFM24VXX_I2C::GetSerialNumber: Serial number not supported")
+                    return true;
+                }
+            }
+        }
+    
+        DEBUG_LEAVE("CFM24VXX_I2C::GetSerialNumber (false)")
+        return false;
+    }
+    
     bool CFM24VXX_I2C::EraseMemoryArea(const short p_startAddress, const int p_count, const unsigned char p_pattern) {
         DEBUG_ENTER("CFM24VXX_I2C::EraseMemoryArea: 0x%02x - %d - 0x%02x", p_startAddress, p_count, p_pattern)
     
@@ -211,6 +279,7 @@
     bool CFM24VXX_I2C::Write(const short p_address, const char *p_datas, const bool p_storeLength, const int p_length2write) {
         DEBUG_ENTER("CFM24VXX_I2C::Write (char *): Memory address: 0x%02x - %x - %d", p_address, p_storeLength, p_length2write)
     
+        DEBUG("CFM24VXX_I2C::Write (char *): Slave address: %02x", _slaveAddress)
         // 1.Prepare buffer
         int length = (p_length2write == -1) ? strlen(p_datas) : p_length2write;
         if (p_storeLength) {
@@ -299,7 +368,7 @@
             // 2. Read data + I2C stop
             int result = _i2cInstance->read(_slaveAddress, i2cBuffer, 2);
             if (result == 0) {
-DEBUG("CFM24VXX_I2C::Read (short): value: 0x%02x - 0x%02x", i2cBuffer[0], i2cBuffer[1])
+                DEBUG("CFM24VXX_I2C::Read (short): value: 0x%02x - 0x%02x", i2cBuffer[0], i2cBuffer[1])
                 if (p_mode ==  BigEndian) {
                     *p_short = (short)(i2cBuffer[0] << 8 | i2cBuffer[1]);
                 } else {
@@ -333,7 +402,7 @@
             // 2. Read data + I2C stop
             int result = _i2cInstance->read(_slaveAddress, i2cBuffer, 4);
             if (result == 0) {
-DEBUG("CFM24VXX_I2C::Read (int): value: 0x%02x - 0x%02x - 0x%02x - 0x%02x", i2cBuffer[0], i2cBuffer[1], i2cBuffer[2], i2cBuffer[3])
+                DEBUG("CFM24VXX_I2C::Read (int): value: 0x%02x - 0x%02x - 0x%02x - 0x%02x", i2cBuffer[0], i2cBuffer[1], i2cBuffer[2], i2cBuffer[3])
                 wait(0.02);
                 if (p_mode ==  BigEndian) {
                     *p_int = (int)(i2cBuffer[0] << 24 | i2cBuffer[1] << 16 | i2cBuffer[2] << 8 | i2cBuffer[3]);
@@ -470,7 +539,56 @@
         DEBUG_LEAVE("CFM24VXX_I2C::Read (string) (false)")
         return false;
     }
-
+    
+    unsigned char CFM24VXX_I2C::ChecksumSN(const unsigned char *pdatas, const unsigned int length) {
+        DEBUG_ENTER("CFM24VXX_I2C::ChecksumSN")
+   
+        unsigned char crctable[256] = {
+            0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15,
+            0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D,
+            0x70, 0x77, 0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65,
+            0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D,
+            0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5,
+            0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD,
+            0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85,
+            0xA8, 0xAF, 0xA6, 0xA1, 0xB4, 0xB3, 0xBA, 0xBD,
+            0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2,
+            0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA,
+            0xB7, 0xB0, 0xB9, 0xBE, 0xAB, 0xAC, 0xA5, 0xA2,
+            0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A,
+            0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32,
+            0x1F, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A,
+            0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42,
+            0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A,
+            0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C,
+            0xB1, 0xB6, 0xBF, 0xB8, 0xAD, 0xAA, 0xA3, 0xA4,
+            0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC,
+            0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4,
+            0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C,
+            0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44,
+            0x19, 0x1E, 0x17, 0x10, 0x05, 0x02, 0x0B, 0x0C,
+            0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34,
+            0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B,
+            0x76, 0x71, 0x78, 0x7F, 0x6A, 0x6D, 0x64, 0x63,
+            0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B,
+            0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13,
+            0xAE, 0xA9, 0xA0, 0xA7, 0xB2, 0xB5, 0xBC, 0xBB,
+            0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83,
+            0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB,
+            0xE6, 0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3
+        };
+        unsigned char crc = 0x00;
+        unsigned int length_ = length;
+        unsigned char *pdata = (unsigned char *)pdatas;
+        while (length_-- != 0) {
+            crc = crctable[crc ^ *pdata++];
+            DEBUG("CFM24VXX_I2C::ChecksumSN: current checksum= 0x%02x - pdata:%08x", crc, pdata)
+        }
+        
+        DEBUG_LEAVE("CFM24VXX_I2C::ChecksumSN: 0x%02x", crc)
+        return crc;
+    }
+    
 #if defined(__DEBUG)
     void CFM24VXX_I2C::DumpMemoryArea(const int p_address, const int p_count) {
         DEBUG_ENTER("CFM24VXX_I2C::DumpMemoryArea: %d - %d", p_address, p_count)