Updated rd_unb2c.py with working UniBoard2_Read_LOC_PWR. Not tested on the hardware

rd_unb2c.py

@@ -4,10 +4,14 @@ Read Hardware info form UNB2C
 
 import sys
 import time
-import os
 sys.path.insert(0,'.')
-from UniBoard2_I2C import *
+import os
+if os.name =="posix":
     from I2C_serial_pi import *
+else:
+    from I2C_serial import *
+
+from UniBoard2_I2C import *
 I2CBUSNR=3
 
 QSFP_PORT=[]
@@ -19,24 +23,30 @@ QSFP_PORT.append(0x40)
 QSFP_PORT.append(0x80)
 
 def rw_eeprom(value=0xAB):
-    I2C_eeprom = I2C(0x53, BUSNR=3)
+    I2C_eeprom = I2C(0x53)
+    I2C_eeprom.bus = I2CBUSNR
+    ret_ack, ret_value = I2C_eeprom.read_bytes(0)
+    if ret_ack < 1:
+        print("no device found")
+    else:
         I2C_eeprom.write_bytes(0x00, value)
-    I2C_eeprom.read_bytes(0x00,1)
-#    I2C_eeprom.write_pointer(0x00)
-#    ret_ack, ret_value = I2C_eeprom.read_last_reg(1)
-    if 0: #ret_ack:
-        stri = "EEPROM readback : {0} ".format(ret_value)
+        ret_ack, ret_value = I2C_eeprom.read_bytes(0x00, 1)
+        stri = "Wrote to EEPROM: {0}, Read from EEPROM: {1} ".format(value, ret_value)
         print(stri)
-    else:
-        print("ACK nok")
 
 def front_led(value=0xFF, ADDRESS=0x71):
-    main_switch = I2C(ADDRESS, BUSNR=I2CBUSNR)
-#    main_switch.bus = I2CBUSNR
+    main_switch = I2C(ADDRESS)
+    main_switch.bus = I2CBUSNR
     main_switch.write_pointer(0x20) #select LED
-    front = I2C(ADDRESS=0x41, BUSNR=I2CBUSNR)
-#    front.bus = I2CBUSNR
+    if ret_ack < 1:
+        print("Main I2C switch not found")
+    else:
+        front = I2C(ADDRESS=0x41)
+        front.bus = I2CBUSNR
         front.write_bytes(0x03, 0)
+        if ret_ack < 1:
+            print("Front LED driver not found")
+        else:
             front.write_bytes(0x01, value)
             sleep(0.5)
             for cnt in range(6):
@@ -46,35 +56,45 @@ def front_led(value=0xFF, ADDRESS=0x71):
             sleep(0.2)
             front.write_bytes(0x01, 0xf)
 
-
-
 def read_pol(i2c_addr):
     LOC_PWR = I2C(i2c_addr)
     LOC_PWR.bus = I2CBUSNR
-    value=[]
-#    ret_ack,vout_mod = LOC_PWR.read_bytes(LP_VOUT_MODE, 1)
-#    ret_ack,ret_value = LOC_PWR.read_bytes(LP_VOUT, 2)
-#    stri = "POL readback {0} : ".format(ret_value)
-#    print(stri)
-#    vout = calc_lin_3bytes(ret_value, vout_mod)
-#    print("vout = ", vout)
-#    ret_ack,ret_value = LOC_PWR.read_bytes(LP_IOUT, 2)
-#    iout = calc_lin_2bytes(ret_value)
-#    print("Output Current :",iout)
+    ret_ack, ret_value = LOC_PWR.read_bytes(0)
+    if ret_ack < 1:
+        print("no device found")
+    else:
+        pr_stri = "Found device at address 0x{:02x}".format(LOC_PWR.I2C_Address)
+        print(pr_stri)
+        ret_ack,ret_value = LOC_PWR.read_bytes(LP_VOUT, 2)
+        vout = calc_lin_3bytes(ret_value, vout_mod)
+        print("read = ", vout_mod)
+        ret_ack,ret_value = LOC_PWR.read_bytes(LP_IOUT, 2)
+        iout = calc_lin_2bytes(ret_value)
+        print("Output Current :",iout)
         ret_ack,ret_value = LOC_PWR.read_bytes(LP_temp, 2)
         temp = calc_lin_2bytes(ret_value)
         print("temperature :",temp)
 
 def read_ddr(node_nr = 0, module=0):
+    main_switch = I2C(0x71)
+    main_switch.bus = I2CBUSNR
     main_switch.write_pointer(0x01<<node_nr) #select Node
+    if ret_ack < 1:
+        print("Main I2C switch not found")
+    else:
+        node_switch = I2C(0x72)
+        node_switch.bus = I2CBUSNR
         node_switch.write_pointer(0x10) #select DDR4
+        if ret_ack < 1:
+            print("Node I2C switch not found")
+        else:
             if module==0:
                 ddr_module = I2C(MB_I_TEMP_I2C_ADDR)
             else:
                 ddr_module = I2C(MB_II_TEMP_I2C_ADDR)
             ddr_module.bus = I2CBUSNR
             ret_ack,raw_ret = ddr_module.read_bytes(MB_TEMP_REG, 2)
-    if len(raw_ret) < 1:
+            if (ret_ack < 1) | (len(raw_ret) < 1):
                 stri = "No DDR moduel in slot {0} node  {1}".format(module, node_nr)
             else:
                 ret_value=[]
@@ -85,12 +105,22 @@ def read_ddr(node_nr = 0, module=0):
             print(stri)
 
 def read_qsfp(node_nr = 0, module=0):
+    main_switch = I2C(0x71)
+    main_switch.bus = I2CBUSNR
     main_switch.write_pointer(0x01<<node_nr) #select Node
+    if ret_ack < 1:
+        print("Main I2C switch not found")
+    else:
+        node_switch = I2C(0x72)
+        node_switch.bus = I2CBUSNR
         node_switch.write_pointer(QSFP_PORT[module]) #select QSFP cage 1
+        if ret_ack < 1:
+            print("Node I2C switch not found")
+        else:
             QSFP_cage = I2C(QSFP_I2C_ADDR)
             QSFP_cage.bus = I2CBUSNR
             ret_ack, raw_ret = QSFP_cage.read_bytes(QSFP_TEMP, 2)
-    if len(raw_ret) < 1:
+            if ret_ack < 1:
                 stri = "No QSFP module in slot {0} node  {1}".format(module, node_nr)
             else:
                 ret_value=[]
@@ -106,15 +136,9 @@ def read_qsfp(node_nr = 0, module=0):
                 stri =  "Voltage QSFP in slot {0} node  {1} is {2:3.2f} V".format(module, node_nr, Power_in_mod)
                 print(stri)
 
-
 if 0:
     rw_eeprom(0xCD)
 else:
-#    main_switch= I2C(0x71)
-#    main_switch.bus = I2CBUSNR
-#    node_switch = I2C(0x72)
-#    node_switch.bus = I2CBUSNR
-#    main_switch.write_pointer(0x20) #select LED
     front_led()
     if 0:
         for node_cnt in range(4):