PCI IO Write

Save the following script as pci_io_write.py

taApp.fileNew("TimingDiagram")
td = taApp.getTimingDiagram()

clk_freq = 33.0e6
clk_per  = 1.0/clk_freq

clk     = td.addDigitalClock("CLK", "H", clk_freq)
strb    = td.addDigitalSignal("STRB", "H")
r_w     = td.addDigitalSignal("R/W", "H")
la      = td.addDigitalBus("LA[31:0]", "A1", "Text")
ld      = td.addDigitalBus("LD[31:0]", "Z", "Text")
rdy     = td.addDigitalSignal("RDY", "H")
frame   = td.addDigitalSignal("FRAME", "H")
ad      = td.addDigitalBus("AD[31:0]", "Z", "Text")
c_be    = td.addDigitalBus("C/BE[3:0]", "Z", "Text")
trdy    = td.addDigitalSignal("TRDY", "H")
irdy    = td.addDigitalSignal("IRDY", "H")
devsel  = td.addDigitalSignal("DEVSEL", "H")


def add_edges(clk_cycle):
   fe_time = (clk_cycle*clk_per) + (clk_per/2.0) + 2.0e-9
   re_time = clk_cycle*clk_per + 2.0e-9
   if clk_cycle == 0:
       td.addEdge(strb,fe_time, "L")
       td.addEdge(la,  fe_time, "VALID")
       td.addEdge(ld,  fe_time, "VALID")
       td.addEdge(r_w, fe_time, "L")
   elif clk_cycle == 1:
       td.addEdge(frame,re_time, "L")
       td.addEdge(ad,re_time, "ADD")
       td.addEdge(c_be,re_time, "CMD")
   elif clk_cycle == 2:
       td.addEdge(frame,re_time, "H")
       td.addEdge(ad,re_time, "Z")
       td.addEdge(c_be,re_time, "BE")
       td.addEdge(irdy,re_time, "L")
   elif clk_cycle == 3:
       td.addEdge(ad,re_time, "DATA")
       td.addEdge(devsel,re_time, "L")
   elif clk_cycle == 4:
       td.addEdge(rdy,re_time, "L")
       td.addEdge(trdy,re_time, "L")
   elif clk_cycle == 5:
       td.addEdge(strb,fe_time, "H")
       td.addEdge(rdy,re_time, "H")
       td.addEdge(ad,re_time, "Z")
       td.addEdge(c_be,re_time, "Z")
       td.addEdge(trdy,re_time, "H")
       td.addEdge(irdy,re_time, "H")
       td.addEdge(devsel,re_time, "H")
   elif clk_cycle == 6:
       td.addEdge(r_w, re_time, "H")
       td.addEdge(ld,re_time, "Z")
       td.addEdge(la,fe_time, "A1")

for clk_cycle in range (0,7):
    add_edges(clk_cycle)

state_list = ['NU','S1','S2','S2','S2','S3','S0']

clk_cycle = 0
for clk_edge in clk.getEdgeList():
    if clk_cycle == 7:
        break
    if clk_edge.getNextState() == "H":
        td.addStateBar(clk_edge,state_list[clk_cycle],"Dashed",0,0)
        clk_cycle+=1

td.setEndTime(300.0e-9)