Attempt to read the SFP I2C lines, created a class for it. Still in progress

0193c6e8 · Paolo Baesso · 9bac0797 · 0193c6e8
Commit 0193c6e8 authored Jun 07, 2018 by Paolo Baesso
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SFPI2C.py packages/SFPI2C.py +59 -0

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--- a/packages/SFPI2C.py
+++ b/packages/SFPI2C.py
+# -*- coding: utf-8 -*-
+import uhal
+from I2CuHal import I2CCore
+import StringIO
+
+class SFPI2C:
+    #Class to configure the EEPROM
+
+    def __init__(self, i2c, slaveaddr=0x50):
+        self.i2c = i2c
+        self.slaveaddr = slaveaddr
+
+    def readEEPROM(self, startadd, nBytes):
+        #Read EEPROM memory locations
+        mystop= False
+        myaddr= [startadd]#0xfa
+        self.i2c.write( self.slaveaddr, [startadd], mystop)
+        res= self.i2c.read( self.slaveaddr, nBytes)
+        return res
+
+    def writeReg(self, regN, regContent, verbose=False):
+        #Basic functionality to write to register.
+        if (regN < 0) | (regN > 7):
+            print "PCA9539PW - ERROR: register number should be in range [0:7]"
+            return
+        regContent= regContent & 0xFF
+        mystop=True
+        cmd= [regN, regContent]
+        self.i2c.write( self.slaveaddr, cmd, mystop)
+
+    def readReg(self, regN, nwords, verbose=False):
+        #Basic functionality to read from register.
+        mystop=False
+        self.i2c.write( self.slaveaddr, [regN], mystop)
+        res= self.i2c.read( self.slaveaddr, nwords)
+        return res
+
+    def getVendorId(self):
+        """ Returns the OUI vendor id"""
+        id=[0, 0, 0]
+        id[0]= self.readReg(37, 1, False)[0]
+        id[1]= self.readReg(38, 1, False)[0]
+        id[2]= self.readReg(39, 1, False)[0]
+        print id
+        return id
+
+    def getVendorPN(self):
+        """ Returns the part number defined by the vendor"""
+        pn=[]
+        for iaddr in range(0, 16):
+            item= self.readReg( 40+iaddr , 1, False)[0]
+            pn.append(item)
+        print pn
+        return pn
+
+    def scanI2C(self):
+        mystop=True
+        for iAddr in range (0, 128):
+            self.i2c.write( iAddr, [], mystop)