Class: OrigenAhbDev::DUTController

Inherits:
Object
  • Object
show all
Includes:
Origen::Controller
Defined in:
lib/origen_ahb_dev/dut_controller.rb

Instance Method Summary collapse

Instance Method Details

#ahb_trans(options = {}) ⇒ Object

Pin driver layer of AHB protocol, used by AHB



55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
 
# File 'lib/origen_ahb_dev/dut_controller.rb', line 55

def ahb_trans(options = {})
  pin(:hclk).drive(0)
  pins(:htrans).drive(0)
  pin(:hwrite).drive(0)
  pin(:hsize).drive(0)
  pin(:hburst).drive(0)
  pin(:hmastlock).drive(0)
  pin(:hprot).drive(0)
  pin(:hready).dont_care
  pins(:haddr).dont_care
  pins(:hwdata).dont_care
  pins(:hrdata).dont_care
  tester.cycle

  # Address Phase
  #
  # Master drives the address and control signals onto bus after the rising edge of HCLK
  pin(:hclk).drive(1)
  tester.cycle

  pin(:htrans).drive(0b00)
  pin(:hwrite).drive(options[:hwrite])
  pin(:hsize).drive(options[:hsize])
  pin(:hburst).drive(options[:hburst])
  pin(:hmastlock).drive(options[:hmastlock])
  pin(:hprot).drive(options[:hprot])
  pins(:haddr).drive(options[:haddr])

  pin(:hclk).drive(0)
  tester.cycle

  # Data Phase
  #
  # Slave samples the address and control information on the next rising edge of HCLK
  pin(:hclk).drive(1)
  tester.cycle

  pin(:hclk).drive(0)
  pin(:hready).compare(1)
  pins(:hwdata).drive(options[:hdata]) if options[:hwrite] == 1
  tester.cycle

  pin(:hclk).drive(1)
  pins(:hrdata).assert(options[:hdata]) if options[:hwrite] == 0
  tester.cycle

  pin(:hclk).drive(0)
  tester.cycle

  pin(:hclk).drive(1)
  pins(:htrans).drive(0)
  pin(:hwrite).drive(0)
  pin(:hsize).drive(0)
  pin(:hburst).drive(0)
  pin(:hmastlock).drive(0)
  pin(:hprot).drive(0)
  pin(:hready).dont_care
  pins(:haddr).dont_care
  pins(:hwdata).dont_care
  pins(:hrdata).dont_care
  tester.cycle

  pin(:hclk).drive(0)
  tester.cycle
end

#cleanup_pins ⇒ Object

Set pins to safe state for pattern end



36
37
38
39
40
41
42
 
# File 'lib/origen_ahb_dev/dut_controller.rb', line 36

def cleanup_pins
  pin(:resetb).drive(0)
  pin(:tclk).drive(0)
  pin(:tdi).drive(0)
  pin(:tms).drive(0)
  pin(:tdo).dont_care
end

#init_pins ⇒ Object

Set pins to initial pin value



27
28
29
30
31
32
33
 
# File 'lib/origen_ahb_dev/dut_controller.rb', line 27

def init_pins
  pin(:resetb).drive(0)
  pin(:tclk).drive(0)
  pin(:tdi).drive(0)
  pin(:tms).drive(0)
  pin(:tdo).dont_care
end

#read_register(reg_or_val, options = {}) ⇒ Object

Dut-level register read using AHB driver



50
51
52
 
# File 'lib/origen_ahb_dev/dut_controller.rb', line 50

def read_register(reg_or_val, options = {})
  ahb.read_register(reg_or_val, options)
end

#shutdown(options = {}) ⇒ Object

Method called on any pattern shutdown to leave pin values in known state



18
19
20
21
22
23
24
 
# File 'lib/origen_ahb_dev/dut_controller.rb', line 18

def shutdown(options = {})
  # Shut everything down
  tester.wait time_in_ns: 250
  pin(:resetb).drive(0)

  cleanup_pins  # Give patterns a known exit condition
end

#startup(options = {}) ⇒ Object

Method called on any pattern startup to init timeset and pin values



6
7
8
9
10
11
12
13
14
15
 
# File 'lib/origen_ahb_dev/dut_controller.rb', line 6

def startup(options = {})
  tester.set_timeset('ahb', 40)

  init_pins     # Give pattern a known start up

  # Do some startup stuff here
  pin(:resetb).drive(0)
  tester.wait time_in_ns: 250
  pin(:resetb).drive(1)
end

#write_register(reg_or_val, options = {}) ⇒ Object

Dut-level register write using AHB driver



45
46
47
 
# File 'lib/origen_ahb_dev/dut_controller.rb', line 45

def write_register(reg_or_val, options = {})
  ahb.write_register(reg_or_val, options)
end