|
| 1 | +#------------------------------------------------------------------------------ |
| 2 | +""" |
| 3 | +
|
| 4 | +CMSIS-DAP Driver |
| 5 | +
|
| 6 | +""" |
| 7 | +#------------------------------------------------------------------------------ |
| 8 | + |
| 9 | +#import struct |
| 10 | +#from array import array as Array |
| 11 | + |
| 12 | +import usbdev |
| 13 | +#import cortexm |
| 14 | +#import iobuf |
| 15 | + |
| 16 | +#------------------------------------------------------------------------------ |
| 17 | +# supported devices |
| 18 | + |
| 19 | +dap_devices = ( |
| 20 | + (0x0d28, 0x0204, 1), # NXP MIMXRT1020-EVK |
| 21 | +) |
| 22 | + |
| 23 | +def itf_lookup(vid, pid): |
| 24 | + """return the interface to use for a given device""" |
| 25 | + for (v, p, i) in dap_devices: |
| 26 | + if (v == vid) and (p == pid): |
| 27 | + return i |
| 28 | + return None |
| 29 | + |
| 30 | +def find(vps=None, sn=None): |
| 31 | + """find an cmsis-dap device based on vid, pid and serial number""" |
| 32 | + if vps is None: |
| 33 | + # look for any dap device |
| 34 | + vps = [(vid, pid) for (vid, pid, itf) in dap_devices] |
| 35 | + return usbdev.find(vps, sn) |
| 36 | + |
| 37 | + |
| 38 | +#------------------------------------------------------------------------------ |
| 39 | +# map register names to cmsis-dap register numbers |
| 40 | + |
| 41 | +regmap = { |
| 42 | + 'r0':0, 'r1':1, 'r2':2, 'r3':3, 'r4':4, 'r5':5, 'r6':6, 'r7':7, |
| 43 | + 'r8':8, 'r9':9, 'r10':10, 'r11':11, 'r12':12, 'r13':13, 'r14':14, 'r15':15, |
| 44 | + 'lr':14, 'pc':15, 'psr':16, 'msp':17, 'psp':18, |
| 45 | + # primask |
| 46 | + # faultmask |
| 47 | + # basepri |
| 48 | + # control |
| 49 | + # 19 ? |
| 50 | + # 20 ? |
| 51 | +} |
| 52 | + |
| 53 | +#------------------------------------------------------------------------------ |
| 54 | + |
| 55 | +class dap: |
| 56 | + """CMSIS-DAP Device Driver""" |
| 57 | + |
| 58 | + def __init__(self, vid, pid, sn): |
| 59 | + self.vid = vid |
| 60 | + self.pid = pid |
| 61 | + self.sn = sn |
| 62 | + itf = itf_lookup(self.vid, self.pid) |
| 63 | + self.usb = usbdev.usbdev() |
| 64 | + self.usb.open(self.vid, self.pid, interface=itf, serial=self.sn) |
| 65 | + |
| 66 | + def __del__(self): |
| 67 | + if self.usb is not None: |
| 68 | + self.close() |
| 69 | + |
| 70 | + def close(self): |
| 71 | + """close the usb interface""" |
| 72 | + self.usb.close() |
| 73 | + self.usb = None |
| 74 | + |
| 75 | + def rd_reg(self, n): |
| 76 | + """read from a register""" |
| 77 | + # TODO |
| 78 | + return 0 |
| 79 | + |
| 80 | + def wr_reg(self, n, val): |
| 81 | + """write to a register""" |
| 82 | + # TODO |
| 83 | + |
| 84 | + def rd_mem8(self, adr, n): |
| 85 | + """read n 8-bit values from memory region""" |
| 86 | + # TODO |
| 87 | + return [0 for i in range(n)] |
| 88 | + |
| 89 | + def rd_mem16(self, adr, n): |
| 90 | + """read n 16-bit values from memory region""" |
| 91 | + assert adr & 1 == 0 |
| 92 | + # TODO |
| 93 | + return [0 for i in range(n)] |
| 94 | + |
| 95 | + def rd_mem32(self, adr, n): |
| 96 | + """read n 32-bit values from memory region""" |
| 97 | + assert adr & 3 == 0 |
| 98 | + # TODO |
| 99 | + return [0 for i in range(n)] |
| 100 | + |
| 101 | + def __str__(self): |
| 102 | + """return a string for basic device description""" |
| 103 | + s = [] |
| 104 | + s.append('CMSIS-DAP usb %04x:%04x serial %r' % (self.vid, self.pid, self.sn)) |
| 105 | + #s.append('target voltage %.3fV' % (float(self.get_voltage()) / 1000.0)) |
| 106 | + return '\n'.join(s) |
| 107 | + |
| 108 | +#------------------------------------------------------------------------------ |
| 109 | + |
| 110 | +class dbgio: |
| 111 | + """CMSIS-DAP implementation of dbgio cpu interface""" |
| 112 | + |
| 113 | + def __init__(self, vid=None, pid=None, idx=None, sn=None): |
| 114 | + """no actual operations, record the selected usb device""" |
| 115 | + self.vid = vid |
| 116 | + self.pid = pid |
| 117 | + self.idx = idx |
| 118 | + self.sn = sn |
| 119 | + self.cpu_name = None |
| 120 | + self.itf = None |
| 121 | + self.menu = ( |
| 122 | + ('info', self.cmd_info), |
| 123 | + ) |
| 124 | + |
| 125 | + def connect(self, cpu_name, itf): |
| 126 | + """connect the debugger to the target""" |
| 127 | + self.cpu_name = cpu_name |
| 128 | + self.dbg_itf = itf |
| 129 | + self.dap = dap(self.vid, self.pid, self.sn) |
| 130 | + |
| 131 | + def disconnect(self): |
| 132 | + """disconnect the debugger from the target""" |
| 133 | + self.dap.close() |
| 134 | + |
| 135 | + def cmd_info(self, ui, args): |
| 136 | + """display cmsis-dap information""" |
| 137 | + ui.put('%s\n' % self) |
| 138 | + |
| 139 | + def is_halted(self): |
| 140 | + """return True if target is halted""" |
| 141 | + # TODO |
| 142 | + return True |
| 143 | + |
| 144 | + def rdreg(self, reg): |
| 145 | + """read from the named register""" |
| 146 | + n = regmap.get(reg, None) |
| 147 | + if n is None: |
| 148 | + return None |
| 149 | + return self.dap.rd_reg(n) |
| 150 | + |
| 151 | + def wrreg(self, reg, val): |
| 152 | + """write to the named register""" |
| 153 | + n = regmap.get(reg, None) |
| 154 | + if n is None: |
| 155 | + return |
| 156 | + self.dap.wr_reg(n, val) |
| 157 | + |
| 158 | + def rdmem32(self, adr, n, io): |
| 159 | + """read n 32-bit words from memory starting at adr""" |
| 160 | + max_n = 0x20 |
| 161 | + while n > 0: |
| 162 | + nread = (n, max_n)[n >= max_n] |
| 163 | + _ = [io.wr32(x) for x in self.dap.rd_mem32(adr, nread)] |
| 164 | + n -= nread |
| 165 | + adr += nread * 4 |
| 166 | + |
| 167 | + def rdmem16(self, adr, n, io): |
| 168 | + """read n 16-bit words from memory starting at adr""" |
| 169 | + max_n = 0x20 |
| 170 | + while n > 0: |
| 171 | + nread = (n, max_n)[n >= max_n] |
| 172 | + _ = [io.wr16(x) for x in self.dap.rd_mem16(adr, nread)] |
| 173 | + n -= nread |
| 174 | + adr += nread * 2 |
| 175 | + |
| 176 | + def rdmem8(self, adr, n, io): |
| 177 | + """read n 8-bit words from memory starting at adr""" |
| 178 | + # n = 0..0x3c (ok), 0x3d..0x40 (slow), >= 0x41 (fails) |
| 179 | + max_n = 0x20 |
| 180 | + while n > 0: |
| 181 | + nread = (n, max_n)[n >= max_n] |
| 182 | + _ = [io.wr8(x) for x in self.dap.rd_mem8(adr, nread)] |
| 183 | + n -= nread |
| 184 | + adr += nread |
| 185 | + |
| 186 | + def rdmem(self, adr, n, io): |
| 187 | + """read a buffer from memory starting at adr""" |
| 188 | + if io.has_wr(32): |
| 189 | + self.rdmem32(adr, n, io) |
| 190 | + elif io.has_wr(16): |
| 191 | + self.rdmem16(adr, n, io) |
| 192 | + elif io.has_wr(8): |
| 193 | + self.rdmem8(adr, n, io) |
| 194 | + else: |
| 195 | + assert False, 'bad buffer width' |
| 196 | + |
| 197 | + def rd32(self, adr): |
| 198 | + """read 32 bit value from adr""" |
| 199 | + return self.dap.rd_mem32(adr, 1)[0] |
| 200 | + |
| 201 | + def rd16(self, adr): |
| 202 | + """read 16 bit value from adr""" |
| 203 | + return self.dap.rd_mem16(adr, 1)[0] |
| 204 | + |
| 205 | + def rd8(self, adr): |
| 206 | + """read 8 bit value from adr""" |
| 207 | + return self.dap.rd_mem8(adr, 1)[0] |
| 208 | + |
| 209 | + def __str__(self): |
| 210 | + return str(self.dap) |
| 211 | + |
| 212 | + |
| 213 | +#------------------------------------------------------------------------------ |
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