Class: OrigenARMDebug::JTAG_DP

Inherits:
Object
  • Object
show all
Includes:
Origen::Model
Defined in:
lib/origen_arm_debug/jtag_dp.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ JTAG_DP

Returns a new instance of JTAG_DP.



7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
 
# File 'lib/origen_arm_debug/jtag_dp.rb', line 7

def initialize(options = {})
  options = {
    ir_size:       4,
    idcode_select: 0b1110,
    abort_select:  0b1000,
    dpacc_select:  0b1010,
    apacc_select:  0b1011
  }.merge(options)
  @dpacc_select = options[:dpacc_select]
  @apacc_select = options[:apacc_select]
  add_reg :ir, 0, size: options[:ir_size]

  # Virtual reg used to represent all of the various 35-bit scan chains
  reg :dr, 0, size: 35 do |reg|
    reg.bit 34..3, :data
    reg.bit 2..1, :a
    reg.bit 0, :rnw
  end

  reg :idcode, options[:idcode_select], access: :ro do |reg|
    reg.bit 31..28, :version
    reg.bit 27..12, :partno
    reg.bit 11..1, :designer
    reg.bit 0, :bit0, reset: 1
  end

  reg :ctrlstat, 0x4 do |reg|
    reg.bit 31, :csyspwrupack
    reg.bit 30, :csyspwrupreq
    reg.bit 29, :cdbgpwrupack
    reg.bit 28, :cdbgpwrupreq
    reg.bit 27, :cdbgrstack
    reg.bit 26, :cdbgrstreq
    reg.bit 23..12, :trncnt
    reg.bit 11..8, :masklane
    reg.bit 5, :stickyerr
    reg.bit 4, :stickycmp
    reg.bit 3..2, :trnmode
    reg.bit 1, :stickyorun
    reg.bit 0, :orundetect
  end

  reg :select, 0x8 do |reg|
    reg.bit 31..24, :apsel
    reg.bit 23..8,  :reserved
    reg.bit 7..4, :apbanksel
  end

  select.write options[:dp_select_reset] if options[:dp_select_reset]

  add_reg :rdbuff, 0xC, access: :ro, reset: 0

  reg :abort, options[:abort_select], access: :wo do |reg|
    reg.bit 0, :dapabort
  end
end

Instance Attribute Details

#apacc_select ⇒ Object (readonly)

Returns the value of attribute apacc_select.



5
6
7
 
# File 'lib/origen_arm_debug/jtag_dp.rb', line 5

def apacc_select
  @apacc_select
end

#dpacc_select ⇒ Object (readonly)

Returns the value of attribute dpacc_select.



5
6
7
 
# File 'lib/origen_arm_debug/jtag_dp.rb', line 5

def dpacc_select
  @dpacc_select
end

Instance Method Details

#abort ⇒ Object 



68
69
70
 
# File 'lib/origen_arm_debug/jtag_dp.rb', line 68

def abort
  reg(:abort)
end

#is_jtag? ⇒ Boolean

Returns:

  • (Boolean) 


72
73
74
 
# File 'lib/origen_arm_debug/jtag_dp.rb', line 72

def is_jtag?
  true
end

#is_swd? ⇒ Boolean Also known as: is_sw?

Returns:

  • (Boolean) 


76
77
78
 
# File 'lib/origen_arm_debug/jtag_dp.rb', line 76

def is_swd?
  false
end

#select ⇒ Object 



64
65
66
 
# File 'lib/origen_arm_debug/jtag_dp.rb', line 64

def select
  reg(:select)
end