Merge branch 'master' of https://git.astron.nl/lofar2.0/python_test_scripts

CCD_I2C.py

@@ -16,6 +16,7 @@ Set CCD
 '''
 import sys
 import time
+import math
 sys.path.insert(0,'.')
 import os
 if os.name =="posix":
@@ -31,8 +32,8 @@ READ_LOCK = True
 READ_ALL = False
 CHECK_EEPROM = True
 PWR_RST = False
-READ_SENSOR = True
-
+READ_SENSOR = False
+READ_SET_FAN = True
 CLK_FREQ = '200MHz'
 dev_i2c_eeprom = I2C(0x50)
 dev_i2c_eeprom.bus_nr = I2CBUSNR
@@ -121,16 +122,16 @@ def setup_pll() :
     I2C_device = I2C(0x20, BUSNR=I2CBUSNR) #clock selection
     I2C_device.write_bytes(0x07, 0x00)
     Write_byte_PLL(0x03, 0x08, PLL_addr)
-    Write_byte_PLL(0x04, 0xCF, PLL_addr) # CF disable not used outputs, 00 enable all
-    Write_byte_PLL(0x05, 0xF0, PLL_addr)
-    Write_byte_PLL(0x06, 0x40, PLL_addr)  # cp inv = 0xF4 other 0xE4
+    Write_byte_PLL(0x04, 0xFF, PLL_addr) # CF disable not used outputs, 00 enable all
+    Write_byte_PLL(0x05, 0xD7, PLL_addr)
+    Write_byte_PLL(0x06, 0xE0, PLL_addr)  # cp inv = 0xF4 other 0xE4
     Write_byte_PLL(0x07, 0x04, PLL_addr)  # Divider R = 1 dec
     Write_byte_PLL(0x08, 0x01, PLL_addr)
     Write_byte_PLL(0x07, 0x00, PLL_addr)
-    Write_byte_PLL(0x09, 0x04, PLL_addr)
+    Write_byte_PLL(0x09, 0x10, PLL_addr)
     Write_byte_PLL(0x0A, 0x01, PLL_addr)
     Write_byte_PLL(0x09, 0x00, PLL_addr)
-    Write_byte_PLL(0x0B, 0x40, PLL_addr)
+    Write_byte_PLL(0x0B, 0x00, PLL_addr)
     Write_byte_PLL(0x0D, 0x01, PLL_addr)
     Write_byte_PLL(0x0E, 0x00, PLL_addr)
     Write_byte_PLL(0x0F, 0x01, PLL_addr)
@@ -251,6 +252,71 @@ def read_temp():
     else:
         print("Error reading tempeature")
 
+def set_fan_off():
+    #
+    # Switch CCD fan off
+    #
+    print("Switch fan off")
+    MAX6620          = 0x29
+    fanmonitor_dev = I2C(MAX6620)
+    fanmonitor_dev.bus_nr = 3
+    fanmonitor_dev.write_bytes(0x00, 0x10)
+    fanmonitor_dev.write_bytes(0x02, 0x08)
+    fanmonitor_dev.write_bytes(0x28, 0x00)
+    fanmonitor_dev.write_bytes(0x29, 0x00)
+
+def set_fan_speed(speed):
+    #
+    # Set control voltage of fan PNP 
+    #
+    stri = "Set fan to {} %".format(speed)
+    print(stri)
+    MAX6620          = 0x29
+    reg_a = ((0xFF*speed)/100) & 0xFF
+    fanmonitor_dev = I2C(MAX6620)
+    fanmonitor_dev.bus_nr = 3
+    fanmonitor_dev.write_bytes(0x00, 0x00)
+    fanmonitor_dev.write_bytes(0x02, 0x08)
+    fanmonitor_dev.write_bytes(0x01, 0x0F)
+    fanmonitor_dev.write_bytes(0x06, 0x60)
+    fanmonitor_dev.write_bytes(0x28, reg_a)
+    fanmonitor_dev.write_bytes(0x29, 0x80) 
+
+
+def read_tacho():
+    #
+    # Read the fan speed
+    #
+    MAX6620          = 0x29
+    REG_TACH_MSP_REGS = [ 0x10, 0x12, 0x14]
+    REG_TACH_LSP_REGS = [ 0x11, 0x13, 0x15]
+    TACH_PERIODS = 16
+    TACH_COUNT_FREQ = 8192
+    FAN_TACHS = 1
+    DEBUG=1
+    fanmonitor_dev = I2C(MAX6620)
+    fanmonitor_dev.bus_nr = 3
+    fan_nr=0
+    ret_ack, ret_value = fanmonitor_dev.read_bytes(1)
+    if ret_ack < 1:
+        stri = " Device {0} at address 0x{1:X} not found".format("MAX6620", MAX6620)
+        print(stri)
+        status = False
+    ret_ack, tach_msb = fanmonitor_dev.read_bytes(REG_TACH_MSP_REGS[0], 1)
+    tach_msb = int(tach_msb, 16) & 0xFF
+    if tach_msb > 254:
+        if DEBUG :
+            tach_lsb = 255
+            tach = 99999
+        rpm = 0
+    else:
+        ret_ack, tach_lsb = fanmonitor_dev.read_bytes(REG_TACH_LSP_REGS[0], 1)
+        tach_lsb = int(tach_lsb, 16) & 0xE0
+        tach = tach_msb*16 + tach_lsb/8
+        rpm = float((TACH_COUNT_FREQ*TACH_PERIODS*60))/(FAN_TACHS*tach)
+    if DEBUG:
+        stri = "MSP: {0}, LSB: {1}, TACH : {2}, RPM : {3:6.2f}".format(tach_msb, tach_lsb, tach, rpm)
+        print(stri)
 
 if CHECK_EEPROM :
     wr_rd_eeprom()
@@ -272,6 +338,13 @@ if READ_LOCK:
         print("Not Locked --> No 10 MHz ref")
     else:
         print("Not locked --> PLL Error")
+if READ_SET_FAN :
+    read_tacho()
+    set_fan_off()
+    sleep(10)
+    set_fan_speed(75)
+    sleep(10)
+    read_tacho()
 
 if READ_SENSOR:
     ccd_sensors()