iCE40/nextpnr - [no description]

about summary refs log tree commit diff stats

path: root/fpga_interchange/arch_pybindings.h

diff options

Diffstat (limited to 'fpga_interchange/arch_pybindings.h')

0 files changed, 0 insertions, 0 deletions

n44'>44 45 46 47 48 49 50 51 52 53 54 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302

#!/usr/bin/env python3
import sys
import struct
import subprocess
import re
import os
import os.path
import argparse


UF2_MAGIC_START0 = 0x0A324655 # "UF2\n"
UF2_MAGIC_START1 = 0x9E5D5157 # Randomly selected
UF2_MAGIC_END    = 0x0AB16F30 # Ditto

families = {
    'SAMD21': 0x68ed2b88,
    'SAML21': 0x1851780a,
    'SAML22': 0x2c29472f,
    'SAMD51': 0x55114460,
    'NRF52': 0x1b57745f,
    'STM32F1': 0x5ee21072,
    'STM32F4': 0x57755a57,
    'ATMEGA32': 0x16573617,
    'MIMXRT10XX': 0x4FB2D5BD
}

INFO_FILE = "/INFO_UF2.TXT"

appstartaddr = 0x2000
familyid = 0x0


def is_uf2(buf):
    w = struct.unpack("<II", buf[0:8])
    return w[0] == UF2_MAGIC_START0 and w[1] == UF2_MAGIC_START1

def is_hex(buf):
    try:
        w = buf[0:30].decode("utf-8")
    except UnicodeDecodeError:
        return False
    if w[0] == ':' and re.match(b"^[:0-9a-fA-F\r\n]+$", buf):
        return True
    return False

def convert_from_uf2(buf):
    global appstartaddr
    numblocks = len(buf) // 512
    curraddr = None
    outp = b""
    for blockno in range(numblocks):
        ptr = blockno * 512
        block = buf[ptr:ptr + 512]
        hd = struct.unpack(b"<IIIIIIII", block[0:32])
        if hd[0] != UF2_MAGIC_START0 or hd[1] != UF2_MAGIC_START1:
            print("Skipping block at " + ptr + "; bad magic")
            continue
        if hd[2] & 1:
            # NO-flash flag set; skip block
            continue
        datalen = hd[4]
        if datalen > 476:
            assert False, "Invalid UF2 data size at " + ptr
        newaddr = hd[3]
        if curraddr == None:
            appstartaddr = newaddr
            curraddr = newaddr
        padding = newaddr - curraddr
        if padding < 0:
            assert False, "Block out of order at " + ptr
        if padding > 10*1024*1024:
            assert False, "More than 10M of padding needed at " + ptr
        if padding % 4 != 0:
            assert False, "Non-word padding size at " + ptr
        while padding > 0:
            padding -= 4
            outp += b"\x00\x00\x00\x00"
        outp += block[32 : 32 + datalen]
        curraddr = newaddr + datalen
    return outp

def convert_to_carray(file_content):
    outp = "const unsigned char bindata[] __attribute__((aligned(16))) = {"
    for i in range(len(file_content)):
        if i % 16 == 0:
            outp += "\n"
        outp += "0x%02x, " % ord(file_content[i])
    outp += "\n};\n"
    return outp

def convert_to_uf2(file_content):
    global familyid
    datapadding = b""
    while len(datapadding) < 512 - 256 - 32 - 4:
        datapadding += b"\x00\x00\x00\x00"
    numblocks = (len(file_content) + 255) // 256
    outp = b""
    for blockno in range(numblocks):
        ptr = 256 * blockno
        chunk = file_content[ptr:ptr + 256]
        flags = 0x0
        if familyid:
            flags |= 0x2000
        hd = struct.pack(b"<IIIIIIII",
            UF2_MAGIC_START0, UF2_MAGIC_START1,
            flags, ptr + appstartaddr, 256, blockno, numblocks, familyid)
        while len(chunk) < 256:
            chunk += b"\x00"
        block = hd + chunk + datapadding + struct.pack(b"<I", UF2_MAGIC_END)
        assert len(block) == 512
        outp += block
    return outp

class Block:
    def __init__(self, addr):
        self.addr = addr
        self.bytes = bytearray(256)

    def encode(self, blockno, numblocks):
        global familyid
        flags = 0x0
        if familyid:
            flags |= 0x2000
        hd = struct.pack("<IIIIIIII",
            UF2_MAGIC_START0, UF2_MAGIC_START1,
            flags, self.addr, 256, blockno, numblocks, familyid)
        hd += self.bytes[0:256]
        while len(hd) < 512 - 4:
            hd += b"\x00"
        hd += struct.pack("<I", UF2_MAGIC_END)
        return hd

def convert_from_hex_to_uf2(buf):
    global appstartaddr
    appstartaddr = None


context:
space:
mode: