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Commit c1f2beb0 authored by Gijs Schoonderbeek's avatar Gijs Schoonderbeek
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i2c interface working, tested on the hardware

parent 20ba6b1b
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1 merge request!2Modified the scripts to run on Raspberry Pi.
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I2C_serial_pi.py
+ 8
− 5
View file @ c1f2beb0
......@@ -42,7 +42,7 @@ class I2C:
# sleep(0.2)
except IOError, err:
ret_ack = 0
ret_value = 0
ret_value = 'ffff'
if DEBUG:
print("Reading error")
return ret_ack, ret_value
......@@ -50,17 +50,20 @@ class I2C:
def read_last_reg(self, bytes_to_read):
bus = smbus.SMBus(self.bus_nr)
ret_value=[]
for cnt in bytes_to_read:
rd_value = []
ret_value = ''
for cnt in range(bytes_to_read):
try:
ret_value.append(bus.read_byte(self.I2C_Address))
rd_value.append(bus.read_byte(self.I2C_Address))
ret_ack = 1
# sleep(0.2)
except IOError, err:
ret_ack = 0
ret_value = 0
rd_value.append(0)
if DEBUG:
print("Reading error")
for cnt in range(bytes_to_read):
ret_value += (hex(rd_value[cnt])[2:])
return ret_ack,ret_value
def write_bytes(self, register, data):
......
rd_unb2c.py
+ 63
− 49
View file @ c1f2beb0
......@@ -30,7 +30,6 @@ sys.path.insert(0, '.')
I2CBUSNR = 3
DEBUG = False
class Unb2cClass:
#
# Class that contains all parts on a UniBoard2
......@@ -44,11 +43,11 @@ class Unb2cClass:
for pol in list(CTR_POLS.keys()):
self.pols.append(PolClass(pol, location = "central"))
self.dev_i2c_eeprom = I2C(EEPROM)
self.dev_i2c_eeprom.bus = I2CBUSNR
self.dev_i2c_eeprom.bus_nr = I2CBUSNR
self.main_switch = I2C(MAIN_I2C_SWITCH)
self.main_switch.bus = I2CBUSNR
self.main_switch.bus_nr = I2CBUSNR
self.front = I2C(LED_DRIVER)
self.front.bus = I2CBUSNR
self.front.bus_nr = I2CBUSNR
def write_eeprom(self, data=0x01):
#
......@@ -125,6 +124,7 @@ class Unb2cClass:
self.front_led(LED_COLORS[color])
for node in self.nodes:
node.print_status()
print("Status central UniBoard2 components")
for pol in self.pols:
pol.print_status()
self.wr_rd_eeprom()
......@@ -182,14 +182,14 @@ class NodeClass:
# Before a node can ba accessed the i2c switches have to be set, this function can be used.
#
main_switch = I2C(MAIN_I2C_SWITCH)
main_switch.bus = I2CBUSNR
main_switch.bus_nr = I2CBUSNR
ret_ack = main_switch.write_bytes(0x0, 0x01 << self.node_number) # select Node
if ret_ack < 1:
if DEBUG:
print("Main I2C switch not found")
else:
node_switch = I2C(NODE_I2C_SWITCH)
node_switch.bus = I2CBUSNR
node_switch.bus_nr = I2CBUSNR
ret_ack = node_switch.write_bytes(0x0, 0x20) # select DDR4
if ret_ack < 1:
if DEBUG:
......@@ -210,14 +210,14 @@ class QsfpClass:
self.status = False
self.select_qsfp()
self.qsfp_cage = I2C(QSFP_I2C_ADDR)
self.qsfp_cage.bus = I2CBUSNR
self.qsfp_cage.bus_nr = I2CBUSNR
def select_qsfp(self):
#
# Function to set the I2C switch to access a QSFP cage
#
node_switch = I2C(NODE_I2C_SWITCH)
node_switch.bus = I2CBUSNR
node_switch.bus_nr = I2CBUSNR
ret_ack = node_switch.write_bytes(0x0, QSFP_PORT[self.port])
if ret_ack < 1:
if DEBUG:
......@@ -232,11 +232,14 @@ class QsfpClass:
#
self.select_qsfp()
ret_ack, raw_ret = self.qsfp_cage.read_bytes(QSFP_TEMP, 2)
if (ret_ack < 1) | (raw_ret[:2] == 'ff'):
if ret_ack < 1:
if DEBUG:
stri = "No QSFP found in port {0}".format(self.port)
print(stri)
self.status = False
else:
if (raw_ret[0:2] == 'ff') | (len(raw_ret) < 4):
self.status = False
else:
ret_value = []
ret_value.append(int(raw_ret[:2], 16))
......@@ -250,11 +253,14 @@ class QsfpClass:
#
self.select_qsfp()
ret_ack, raw_ret = self.qsfp_cage.read_bytes(QSFP_VOLT, 2)
if (ret_ack < 1) | (raw_ret[:2] == 'ff'):
if ret_ack < 1:
if DEBUG:
stri = "No QSFP found in port {0}".format(self.port)
print(stri)
self.status = False
else:
if (raw_ret[0:2] == 'ff') | (len(raw_ret) < 4):
self.status = False
else:
ret_value = []
ret_value.append(int(raw_ret[:2], 16))
......@@ -293,14 +299,14 @@ class DdrClass:
self.ddr_dev = I2C(MB_I_TEMP_I2C_ADDR)
else:
self.ddr_dev = I2C(MB_II_TEMP_I2C_ADDR)
self.ddr_dev.bus = I2CBUSNR
self.ddr_dev.bus_nr = I2CBUSNR
def set_i2c_switch(self):
#
# Function to set the I2C switch to access the DDR4 modules
#
node_switch = I2C(NODE_I2C_SWITCH)
node_switch.bus = I2CBUSNR
node_switch.bus_nr = I2CBUSNR
ret_ack = node_switch.write_bytes(0x0, DDR4)
if ret_ack < 1:
if DEBUG:
......@@ -355,17 +361,18 @@ class PolClass:
self.vout = 0
self.iout = 0
self.temp = 0
if self.location == "node":
self.set_i2c_switch()
if self.location == "node":
self.pol_dev = I2C(LOC_POLS[self.name])
else:
self.pol_dev = I2C(CTR_POLS[self.name])
self.pol_dev.bus = I2CBUSNR
sleep(0.1)
ret_ack, ret_value = self.pol_dev.read_bytes(0)
self.pol_dev.bus_nr = I2CBUSNR
ret_ack, ret_value = self.pol_dev.read_bytes(1)
if ret_ack < 1:
if DEBUG:
if self.location == "node": # DEBUG:
stri = " Device {0} at address 0x{1:X} not found".format(self.name, LOC_POLS[self.name])
else:
stri = " Device {0} at address 0x{1:X} not found".format(self.name, CTR_POLS[self.name])
print(stri)
self.status = False
else:
......@@ -375,15 +382,27 @@ class PolClass:
#
# Function to set the I2C switch to access the Point of Load DC/DC converter
#
if self.location == 'node':
node_switch = I2C(NODE_I2C_SWITCH)
node_switch.bus = I2CBUSNR
node_switch.bus_nr = I2CBUSNR
ret_ack = node_switch.write_bytes(0x0, LOC_POWER)
if ret_ack < 1:
if DEBUG:
print("Node I2C switch not found")
self.status = False
else:
self.status = True
else:
main_switch = I2C(MAIN_I2C_SWITCH)
main_switch.bus_nr = I2CBUSNR
ret_ack = main_switch.write_bytes(0x10, 0x10)
if ret_ack < 1:
if DEBUG:
print("Main I2C switch not found")
self.status = False
else:
self.status = True
return False
def read_vout(self):
#
......@@ -392,9 +411,7 @@ class PolClass:
if self.status:
if type == "node":
self.set_i2c_switch()
sleep(0.1)
ret_ack, vout_mod = self.pol_dev.read_bytes(LP_VOUT_MODE, 1)
sleep(0.1)
ret_ack, raw_value = self.pol_dev.read_bytes(LP_VOUT, 2)
vout_mod = int(vout_mod, 16)
ret_value = []
......@@ -409,9 +426,7 @@ class PolClass:
# Function to read the output current of the Point of Load DC/DC converter
#
if self.status:
if type == "node":
self.set_i2c_switch()
sleep(0.1)
ret_ack, raw_value = self.pol_dev.read_bytes(LP_IOUT, 2)
ret_value = []
ret_value.append(int(raw_value[:2], 16))
......@@ -425,9 +440,7 @@ class PolClass:
# Function to read the temperature of the Point of Load DC/DC converter
#
if self.status:
if type == "node":
self.set_i2c_switch()
sleep(0.1)
ret_ack, raw_value = self.pol_dev.read_bytes(LP_temp, 2)
ret_value = []
ret_value.append(int(raw_value[:2], 16))
......@@ -461,6 +474,7 @@ def main():
# Function to test the class, read all info and dump on the screen
#
unb = Unb2cClass()
if unb.wr_rd_eeprom(value=0x34):
unb.read_all()
unb.print_status()
......
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