examples/de1/constraints.py

   1 class Constraints:
   2         def __init__(self, in_rst_n, cd_in, spi2csr0, led0, sw0):
   3                 self.constraints = []
   4                 def add(signal, pin, vec=-1, iostandard="3.3-V LVTTL", extra="", sch=""):
   5                         self.constraints.append((signal, vec, pin, iostandard, extra,sch))
   6                 def add_vec(signal, pins, iostandard="3.3-V LVTTL", extra="", sch=""):
   7                         assert(signal.nbits == len(pins)), "%s size : %d / qsf size : %d" %(signal,signal.bv.width,len(pins))
   8                         i = 0
   9                         for p in pins:
  10                                 add(signal, p, i, iostandard, extra)
  11                                 i += 1
  12                 # sys_clk
  13                 add(cd_in.clk,  "L1")   # CLOCK_50
  14
  15                 # sys_rst
  16                 add(in_rst_n,  "R22")   # KEY[0]
  17
  18                 # spi2csr0
  19                 add(spi2csr0.spi_clk,  "F13")           #GPIO_1[9]
  20                 add(spi2csr0.spi_cs_n, "G15")           #GPIO_1[3]
  21                 add(spi2csr0.spi_mosi, "E15")           #GPIO_1[5]
  22                 add(spi2csr0.spi_miso, "G16")           #GPIO_1[7]
  23
  24                 # led0
  25                 add_vec(led0,   ["U22", "U21", "V22", "V21",
  26                                          "W22" , "W21" , "Y22" , "Y21"])
  27                 # sw0
  28                 add_vec(sw0,    ["L22", "L21", "M22", "V12",
  29                                          "W12" , "U12" , "U11" , "M2"])
  30
  31         def get_ios(self):
  32                 return set([c[0] for c in self.constraints])
  33
  34         def get_qsf(self, ns):
  35                 r = ""
  36                 for c in self.constraints:
  37                         r += "set_location_assignment PIN_"+str(c[2])
  38                         r += " -to " + ns.get_name(c[0])
  39                         if c[1] >= 0:
  40                                 r += "[" + str(c[1]) + "]"
  41                         r += "\n"
  42
  43                         r += "set_instance_assignment -name IO_STANDARD "
  44                         r += "\"" + c[3] + "\""
  45                         r += " -to " + ns.get_name(c[0])
  46                         if c[1] >= 0:
  47                                 r += "[" + str(c[1]) + "]"
  48                         r += "\n"
  49
  50                 r += """
  51 set_global_assignment -name FAMILY "Cyclone II"
  52 set_global_assignment -name DEVICE EP2C20F484C7
  53 set_global_assignment -name TOP_LEVEL_ENTITY "de1"
  54 set_global_assignment -name CYCLONEII_RESERVE_NCEO_AFTER_CONFIGURATION "USE AS REGULAR IO"
  55 set_global_assignment -name RESERVE_FLASH_NCE_AFTER_CONFIGURATION "USE AS REGULAR IO"
  56 set_global_assignment -name RESERVE_DATA0_AFTER_CONFIGURATION "USE AS REGULAR IO"
  57 set_global_assignment -name RESERVE_DATA1_AFTER_CONFIGURATION "USE AS REGULAR IO"
  58 set_global_assignment -name RESERVE_DCLK_AFTER_CONFIGURATION "USE AS REGULAR IO"
  59 set_global_assignment -name DUTY_CYCLE 50 -section_id in_clk
  60 set_global_assignment -name FMAX_REQUIREMENT "50.0 MHz" -section_id in_clk
  61                         """
  62                 return r