├── .gitignore ├── 99-ch341a-prog.rules ├── COPYING ├── Makefile ├── README.md ├── ch341a.c ├── ch341a.h ├── debian ├── ch341prog.dirs ├── ch341prog.substvars ├── changelog ├── compat ├── control ├── rules └── source │ └── format └── main.c /.gitignore: -------------------------------------------------------------------------------- 1 | *.o 2 | *~ 3 | ch341prog 4 | 5 | /debian/ch341prog\.debhelper\.log 6 | /debian/debhelper-build-stamp 7 | /debian/files 8 | -------------------------------------------------------------------------------- /99-ch341a-prog.rules: -------------------------------------------------------------------------------- 1 | # udev rule that sets permissions for CH341A programmer in Linux. 2 | # Put this file in /etc/udev/rules.d and reload udev rules or reboot to install 3 | SUBSYSTEM=="usb", ATTRS{idVendor}=="1a86", ATTRS{idProduct}=="5512", MODE="0666" 4 | -------------------------------------------------------------------------------- /COPYING: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | PKG=ch341prog 2 | 3 | prefix = /usr/local 4 | bindir = $(prefix)/bin 5 | sharedir = $(prefix)/share 6 | mandir = $(sharedir)/man 7 | man1dir = $(mandir)/man1 8 | 9 | CFLAGS=-std=gnu99 -Wall 10 | $(PKG): main.c ch341a.c ch341a.h 11 | gcc $(CFLAGS) ch341a.c main.c -o $(PKG) -lusb-1.0 12 | clean: 13 | rm *.o $(PKG) -f 14 | install-udev-rule: 15 | cp 99-ch341a-prog.rules /etc/udev/rules.d/ 16 | udevadm control --reload-rules 17 | .PHONY: clean install-udev-rule 18 | 19 | install: $(PKG) 20 | install $(PKG) $(DESTDIR)$(bindir) 21 | install -m 0664 99-ch341a-prog.rules $(DESTDIR)/etc/udev/rules.d/99-ch341a-prog.rules 22 | 23 | debian/changelog: 24 | #gbp dch --debian-tag='%(version)s' -S -a --ignore-branch -N '$(VERSION)' 25 | dch --create -v 1.0-1 --package $(PKG) 26 | 27 | deb: 28 | dpkg-buildpackage -b -us -uc 29 | .PHONY: install debian/changelog deb 30 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | Ch341Prog 2 | ============ 3 | A simple command line tool(programmer) interfacing with ch341a under Linux OS and macOS. 4 | 5 | Description 6 | ------------ 7 | There are a lot cheap SPI/IIC programmers based on ch341a, which can be bought 8 | from ebay for as low as $3. However, there was no Linux based tools associated 9 | with the hardware, and the best I can find is a tool called `ch341eepromtool' 10 | (http://sourceforge.net/projects/ch341eepromtool/) which can only deal with 11 | IIC EEPROMs. So I decide to write my own. 12 | 13 | After reading the source for ch341eeprom and sniffering the usb traffic, 14 | I thinks I have fully understood the usb protocol. So, here is what I have 15 | got so far. 16 | 17 | Special thanks to asbokid, the ch341eepromtool's author. 18 | 19 | License 20 | ------------ 21 | This is free software: you can redistribute it and/or modify it under 22 | the terms of the latest GNU General Public License as published by the 23 | Free Software Foundation. 24 | 25 | This program is distributed in the hope that it will be useful, but 26 | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 27 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 28 | for more details. 29 | 30 | You should have received a copy of the GNU General Public License along 31 | with this program. If not, see . 32 | 33 | Speed Test 34 | ----------- 35 | * read a 8M flash(W25Q64) costs 101.840 seconds 36 | * write to an 8M flash(W25Q64) costs 158.811 seconds 37 | 38 | Linux Permissions 39 | ------------------ 40 | To ensure the CH341 programmer will be set up with proper permissions on a Linux computer, run the following command to install a udev rule file into /etc/udev/rules.d: 41 | 42 | `sudo make install-udev-rule` 43 | -------------------------------------------------------------------------------- /ch341a.c: -------------------------------------------------------------------------------- 1 | /* 2 | * This file is part of the ch341prog project. 3 | * 4 | * Copyright (C) 2014 Pluto Yang (yangyj.ee@gmail.com) 5 | * 6 | * This program is free software; you can redistribute it and/or modify 7 | * it under the terms of the GNU General Public License as published by 8 | * the Free Software Foundation; either version 2 of the License, or 9 | * (at your option) any later version. 10 | * 11 | * This program is distributed in the hope that it will be useful, 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 | * GNU General Public License for more details. 15 | * 16 | * You should have received a copy of the GNU General Public License 17 | * along with this program; if not, write to the Free Software 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 19 | * 20 | * verbose functionality forked from https://github.com/vSlipenchuk/ch341prog/commit/5afb03fe27b54dbcc88f6584417971d045dd8dab 21 | * 22 | */ 23 | 24 | #include 25 | #include 26 | #include 27 | #include 28 | #include 29 | #include 30 | #include 31 | #include "ch341a.h" 32 | 33 | struct libusb_device_handle *devHandle = NULL; 34 | struct sigaction saold; 35 | int force_stop = 0; 36 | 37 | void v_print(int mode, int len) ; 38 | 39 | /* SIGINT handler */ 40 | void sig_int(int signo) 41 | { 42 | force_stop = 1; 43 | } 44 | 45 | /* Configure CH341A, find the device and set the default interface. */ 46 | int32_t ch341Configure(uint16_t vid, uint16_t pid) 47 | { 48 | struct libusb_device *dev; 49 | int32_t ret; 50 | struct sigaction sa; 51 | 52 | uint8_t desc[0x12]; 53 | 54 | if (devHandle != NULL) { 55 | fprintf(stderr, "Call ch341Release before re-configure\n"); 56 | return -1; 57 | } 58 | ret = libusb_init(NULL); 59 | if(ret < 0) { 60 | fprintf(stderr, "Couldn't initialise libusb\n"); 61 | return -1; 62 | } 63 | 64 | #if LIBUSB_API_VERSION < 0x01000106 65 | libusb_set_debug(NULL, 3); 66 | #else 67 | libusb_set_option(NULL, LIBUSB_OPTION_LOG_LEVEL, LIBUSB_LOG_LEVEL_INFO); 68 | #endif 69 | 70 | if(!(devHandle = libusb_open_device_with_vid_pid(NULL, vid, pid))) { 71 | fprintf(stderr, "Couldn't open device [%04x:%04x].\n", vid, pid); 72 | return -1; 73 | } 74 | 75 | if(!(dev = libusb_get_device(devHandle))) { 76 | fprintf(stderr, "Couldn't get bus number and address.\n"); 77 | goto close_handle; 78 | } 79 | 80 | if(libusb_kernel_driver_active(devHandle, 0)) { 81 | ret = libusb_detach_kernel_driver(devHandle, 0); 82 | if(ret) { 83 | fprintf(stderr, "Failed to detach kernel driver: '%s'\n", strerror(-ret)); 84 | goto close_handle; 85 | } 86 | } 87 | 88 | ret = libusb_claim_interface(devHandle, 0); 89 | 90 | if(ret) { 91 | fprintf(stderr, "Failed to claim interface 0: '%s'\n", strerror(-ret)); 92 | goto close_handle; 93 | } 94 | 95 | ret = libusb_get_descriptor(devHandle, LIBUSB_DT_DEVICE, 0x00, desc, 0x12); 96 | 97 | if(ret < 0) { 98 | fprintf(stderr, "Failed to get device descriptor: '%s'\n", strerror(-ret)); 99 | goto release_interface; 100 | } 101 | 102 | printf("Device reported its revision [%d.%02d]\n", desc[12], desc[13]); 103 | sa.sa_handler = &sig_int; 104 | sa.sa_flags = SA_RESTART; 105 | sigfillset(&sa.sa_mask); 106 | if (sigaction(SIGINT, &sa, &saold) == -1) { 107 | perror("Error: cannot handle SIGINT"); // Should not happen 108 | } 109 | return 0; 110 | release_interface: 111 | libusb_release_interface(devHandle, 0); 112 | close_handle: 113 | libusb_close(devHandle); 114 | devHandle = NULL; 115 | return -1; 116 | } 117 | 118 | /* release libusb structure and ready to exit */ 119 | int32_t ch341Release(void) 120 | { 121 | if (devHandle == NULL) return -1; 122 | libusb_release_interface(devHandle, 0); 123 | libusb_close(devHandle); 124 | libusb_exit(NULL); 125 | devHandle = NULL; 126 | sigaction(SIGINT, &saold, NULL); 127 | return 0; 128 | } 129 | 130 | /* Helper function for libusb_bulk_transfer, display error message with the caller name */ 131 | int32_t usbTransfer(const char * func, uint8_t type, uint8_t* buf, int len) 132 | { 133 | int32_t ret; 134 | int transfered; 135 | if (devHandle == NULL) return -1; 136 | ret = libusb_bulk_transfer(devHandle, type, buf, len, &transfered, DEFAULT_TIMEOUT); 137 | if (ret < 0) { 138 | fprintf(stderr, "%s: Failed to %s %d bytes '%s'\n", func, 139 | (type == BULK_WRITE_ENDPOINT) ? "write" : "read", len, libusb_error_name(ret)); 140 | return -1; 141 | } 142 | return transfered; 143 | } 144 | 145 | /* set the i2c bus speed (speed(b1b0): 0 = 20kHz; 1 = 100kHz, 2 = 400kHz, 3 = 750kHz) 146 | * set the spi bus data width(speed(b2): 0 = Single, 1 = Double) */ 147 | int32_t ch341SetStream(uint32_t speed) { 148 | uint8_t buf[3]; 149 | 150 | if (devHandle == NULL) return -1; 151 | buf[0] = CH341A_CMD_I2C_STREAM; 152 | buf[1] = CH341A_CMD_I2C_STM_SET | (speed & 0x7); 153 | buf[2] = CH341A_CMD_I2C_STM_END; 154 | 155 | return usbTransfer(__func__, BULK_WRITE_ENDPOINT, buf, 3); 156 | } 157 | 158 | /* ch341 requres LSB first, swap the bit order before send and after receive */ 159 | uint8_t swapByte(uint8_t c) 160 | { 161 | static const uint8_t reverse_table[] = { 162 | 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 163 | 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0, 164 | 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, 165 | 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, 166 | 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, 167 | 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4, 168 | 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, 169 | 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, 170 | 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, 171 | 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, 172 | 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, 173 | 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, 174 | 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, 175 | 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6, 176 | 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, 177 | 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, 178 | 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, 179 | 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1, 180 | 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 181 | 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, 182 | 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, 183 | 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, 184 | 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, 185 | 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd, 186 | 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, 187 | 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, 188 | 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, 189 | 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, 190 | 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, 191 | 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, 192 | 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 193 | 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff 194 | }; 195 | return reverse_table[c]; 196 | } 197 | 198 | /* assert or deassert the chip-select pin of the spi device */ 199 | void ch341SpiCs(uint8_t *ptr, bool selected) 200 | { 201 | *ptr++ = CH341A_CMD_UIO_STREAM; 202 | *ptr++ = CH341A_CMD_UIO_STM_OUT | (selected ? 0x36 : 0x37); 203 | if (selected) 204 | *ptr++ = CH341A_CMD_UIO_STM_DIR | 0x3F; // pin direction 205 | *ptr++ = CH341A_CMD_UIO_STM_END; 206 | } 207 | 208 | /* transfer len bytes of data to the spi device */ 209 | int32_t ch341SpiStream(uint8_t *out, uint8_t *in, uint32_t len) 210 | { 211 | uint8_t inBuf[CH341_PACKET_LENGTH], outBuf[CH341_PACKET_LENGTH], *inPtr, *outPtr; 212 | int32_t ret, packetLen; 213 | bool done; 214 | 215 | if (devHandle == NULL) return -1; 216 | 217 | ch341SpiCs(outBuf, true); 218 | ret = usbTransfer(__func__, BULK_WRITE_ENDPOINT, outBuf, 4); 219 | if (ret < 0) return -1; 220 | 221 | inPtr = in; 222 | 223 | do { 224 | done=true; 225 | packetLen=len+1; // STREAM COMMAND + data length 226 | if (packetLen>CH341_PACKET_LENGTH) { 227 | packetLen=CH341_PACKET_LENGTH; 228 | done=false; 229 | } 230 | outPtr = outBuf; 231 | *outPtr++ = CH341A_CMD_SPI_STREAM; 232 | for (int i = 0; i < packetLen-1; ++i) 233 | *outPtr++ = swapByte(*out++); 234 | ret = usbTransfer(__func__, BULK_WRITE_ENDPOINT, outBuf, packetLen); 235 | if (ret < 0) return -1; 236 | ret = usbTransfer(__func__, BULK_READ_ENDPOINT, inBuf, packetLen-1); 237 | if (ret < 0) return -1; 238 | len -= ret; 239 | 240 | for (int i = 0; i < ret; ++i) // swap the buffer 241 | *inPtr++ = swapByte(inBuf[i]); 242 | } while (!done); 243 | 244 | ch341SpiCs(outBuf, false); 245 | ret = usbTransfer(__func__, BULK_WRITE_ENDPOINT, outBuf, 3); 246 | if (ret < 0) return -1; 247 | return 0; 248 | } 249 | 250 | #define JEDEC_ID_LEN 0x52 // additional byte due to SPI shift 251 | /* read the JEDEC ID of the SPI Flash */ 252 | int32_t ch341SpiCapacity(void) 253 | { 254 | uint8_t out[JEDEC_ID_LEN]; 255 | uint8_t in[JEDEC_ID_LEN], *ptr, cap; 256 | int32_t ret; 257 | 258 | if (devHandle == NULL) 259 | return -1; 260 | 261 | ptr = out; 262 | *ptr++ = 0x9F; // Read JEDEC ID 263 | 264 | for (int i = 0; i < JEDEC_ID_LEN - 1; ++i) 265 | *ptr++ = 0x00; 266 | 267 | ret = ch341SpiStream(out, in, JEDEC_ID_LEN); 268 | 269 | if (ret < 0) 270 | return ret; 271 | 272 | if (! (in[1] == 0xFF && in[2] == 0xFF && in[3] == 0xFF)) 273 | { 274 | printf("Manufacturer ID: %02x\n", in[1]); 275 | printf("Memory Type: %02x%02x\n", in[2], in[3]); 276 | 277 | if (in[0x11] == 'Q' && in[0x12] == 'R' && in[0x13] == 'Y') 278 | { 279 | cap = in[0x28]; 280 | printf("Reading device capacity from CFI structure\n"); 281 | } 282 | else 283 | { 284 | cap = in[3]; 285 | printf("No CFI structure found, trying to get capacity from device ID. Set manually if detection fails.\n"); 286 | } 287 | 288 | printf("Capacity: %02x\n", cap); 289 | } 290 | else 291 | { 292 | printf("Chip not found or missed in ch341a. Check connection\n"); 293 | exit(0); 294 | } 295 | 296 | return cap; 297 | } 298 | 299 | /* read status register */ 300 | int32_t ch341ReadStatus(void) 301 | { 302 | uint8_t out[2]; 303 | uint8_t in[2]; 304 | int32_t ret; 305 | 306 | if (devHandle == NULL) return -1; 307 | out[0] = 0x05; // Read status 308 | ret = ch341SpiStream(out, in, 2); 309 | if (ret < 0) return ret; 310 | return (in[1]); 311 | } 312 | 313 | /* write status register */ 314 | int32_t ch341WriteStatus(uint8_t status) 315 | { 316 | uint8_t out[2]; 317 | uint8_t in[2]; 318 | int32_t ret; 319 | 320 | if (devHandle == NULL) return -1; 321 | out[0] = 0x06; // Write enable 322 | ret = ch341SpiStream(out, in, 1); 323 | if (ret < 0) return ret; 324 | out[0] = 0x01; // Write status 325 | out[1] = status; 326 | ret = ch341SpiStream(out, in, 2); 327 | if (ret < 0) return ret; 328 | out[0] = 0x04; // Write disable 329 | ret = ch341SpiStream(out, in, 1); 330 | if (ret < 0) return ret; 331 | return 0; 332 | } 333 | 334 | /* chip erase */ 335 | int32_t ch341EraseChip(void) 336 | { 337 | uint8_t out[1]; 338 | uint8_t in[1]; 339 | int32_t ret; 340 | 341 | if (devHandle == NULL) return -1; 342 | out[0] = 0x06; // Write enable 343 | ret = ch341SpiStream(out, in, 1); 344 | if (ret < 0) return ret; 345 | out[0] = 0xC7; // Chip erase 346 | ret = ch341SpiStream(out, in, 1); 347 | if (ret < 0) return ret; 348 | out[0] = 0x04; // Write disable 349 | ret = ch341SpiStream(out, in, 1); 350 | if (ret < 0) return ret; 351 | return 0; 352 | } 353 | 354 | /* callback for bulk out async transfer */ 355 | void cbBulkOut(struct libusb_transfer *transfer) 356 | { 357 | if (transfer->status != LIBUSB_TRANSFER_COMPLETED) { 358 | fprintf(stderr, "\ncbBulkOut: error : %d\n", transfer->status); 359 | } 360 | } 361 | 362 | struct spi_transfer_in { 363 | ssize_t bulk_count; 364 | size_t skip_bytes; 365 | uint8_t *read_buffer; 366 | }; 367 | 368 | /* callback for bulk in async transfer */ 369 | void cbBulkIn(struct libusb_transfer *transfer) 370 | { 371 | struct spi_transfer_in *tf = transfer->user_data; 372 | switch(transfer->status) { 373 | case LIBUSB_TRANSFER_COMPLETED: 374 | /* the first package has cmd and address info, so discard 4 bytes */ 375 | if (tf->read_buffer != NULL) { 376 | int i = tf->bulk_count? 0: tf->skip_bytes; 377 | for(; i < transfer->actual_length; ++i) { 378 | *tf->read_buffer++ = swapByte(transfer->buffer[i]); 379 | } 380 | } 381 | tf->bulk_count++; 382 | break; 383 | default: 384 | fprintf(stderr, "\ncbBulkIn: error : %d\n", transfer->status); 385 | tf->bulk_count = -1; 386 | } 387 | return; 388 | } 389 | 390 | /* read the content of SPI device to buf, make sure the buf is big enough before call */ 391 | int32_t ch341SpiRead(uint8_t *buf, uint32_t add, uint32_t len) 392 | { 393 | uint8_t out[CH341_MAX_PACKET_LEN]; 394 | uint8_t in[CH341_PACKET_LENGTH]; 395 | bool fourbyte = (add + len) > (1 << 24); 396 | 397 | if (devHandle == NULL) return -1; 398 | /* what subtracted is: 1. first cs package, 2. leading command for every other packages, 399 | * 3. second package contains read flash command and 3 bytes address */ 400 | const uint32_t max_payload = CH341_MAX_PACKET_LEN - CH341_PACKET_LENGTH 401 | - CH341_MAX_PACKETS + 1 - 4 - (fourbyte? 1: 0); 402 | uint32_t pkg_len, pkg_count; 403 | struct libusb_transfer *xferBulkIn, *xferBulkOut; 404 | uint32_t idx = 0; 405 | uint32_t ret; 406 | int32_t old_counter; 407 | struct timeval tv = {0, 100}; 408 | struct spi_transfer_in bulk_in = {}; 409 | 410 | v_print( 0, len); // verbose 411 | 412 | memset(out, 0xff, CH341_MAX_PACKET_LEN); 413 | for (int i = 1; i < CH341_MAX_PACKETS; ++i) // fill CH341A_CMD_SPI_STREAM for every packet 414 | out[i * CH341_PACKET_LENGTH] = CH341A_CMD_SPI_STREAM; 415 | memset(in, 0x00, CH341_PACKET_LENGTH); 416 | xferBulkIn = libusb_alloc_transfer(0); 417 | xferBulkOut = libusb_alloc_transfer(0); 418 | 419 | printf("Read started!\n"); 420 | while (len > 0) { 421 | v_print( 1, len); // verbose 422 | fflush(stdout); 423 | ch341SpiCs(out, true); 424 | idx = CH341_PACKET_LENGTH + 1; 425 | out[idx++] = swapByte(fourbyte? 0x13: 0x03); 426 | if (fourbyte) 427 | out[idx++] = swapByte(add >> 24); 428 | out[idx++] = swapByte(add >> 16); 429 | out[idx++] = swapByte(add >> 8); 430 | out[idx++] = swapByte(add); 431 | bulk_in.skip_bytes = fourbyte? 5: 4; 432 | if (len > max_payload) { 433 | pkg_len = CH341_MAX_PACKET_LEN; 434 | pkg_count = CH341_MAX_PACKETS - 1; 435 | len -= max_payload; 436 | add += max_payload; 437 | } else { 438 | pkg_count = (len + 4) / (CH341_PACKET_LENGTH - 1); 439 | if ((len + 4) % (CH341_PACKET_LENGTH - 1)) pkg_count ++; 440 | pkg_len = (pkg_count) * CH341_PACKET_LENGTH + ((len + 4) % (CH341_PACKET_LENGTH - 1)) + 1; 441 | len = 0; 442 | } 443 | bulk_in.bulk_count = 0; 444 | bulk_in.read_buffer = buf; 445 | libusb_fill_bulk_transfer(xferBulkIn, devHandle, BULK_READ_ENDPOINT, in, 446 | CH341_PACKET_LENGTH, cbBulkIn, &bulk_in, DEFAULT_TIMEOUT); 447 | buf += max_payload; // advance user's pointer 448 | libusb_submit_transfer(xferBulkIn); 449 | libusb_fill_bulk_transfer(xferBulkOut, devHandle, BULK_WRITE_ENDPOINT, out, 450 | pkg_len, cbBulkOut, NULL, DEFAULT_TIMEOUT); 451 | libusb_submit_transfer(xferBulkOut); 452 | old_counter = bulk_in.bulk_count; 453 | while (bulk_in.bulk_count < pkg_count) { 454 | libusb_handle_events_timeout(NULL, &tv); 455 | if (bulk_in.bulk_count == -1) { // encountered error 456 | len = 0; 457 | ret = -1; 458 | break; 459 | } 460 | if (old_counter != bulk_in.bulk_count) { // new package came 461 | if (bulk_in.bulk_count != pkg_count) 462 | libusb_submit_transfer(xferBulkIn); // resubmit bulk in request 463 | old_counter = bulk_in.bulk_count; 464 | } 465 | } 466 | ch341SpiCs(out, false); 467 | ret = usbTransfer(__func__, BULK_WRITE_ENDPOINT, out, 3); 468 | if (ret < 0) break; 469 | if (force_stop == 1) { // user hit ctrl+C 470 | force_stop = 0; 471 | if (len > 0) 472 | fprintf(stderr, "User hit Ctrl+C, reading unfinished.\n"); 473 | break; 474 | } 475 | } 476 | libusb_free_transfer(xferBulkIn); 477 | libusb_free_transfer(xferBulkOut); 478 | v_print(2, 0); 479 | return ret; 480 | } 481 | 482 | #define WRITE_PAYLOAD_LENGTH 301 // 301 is the length of a page(256)'s data with protocol overhead 483 | /* write buffer(*buf) to SPI flash */ 484 | int32_t ch341SpiWrite(uint8_t *buf, uint32_t add, uint32_t len) 485 | { 486 | uint8_t out[WRITE_PAYLOAD_LENGTH]; 487 | uint8_t in[CH341_PACKET_LENGTH]; 488 | uint32_t tmp, pkg_count; 489 | struct libusb_transfer *xferBulkIn, *xferBulkOut; 490 | uint32_t idx = 0; 491 | uint32_t ret; 492 | int32_t old_counter; 493 | struct timeval tv = {0, 100}; 494 | bool fourbyte = (add + len) > (1 << 24); 495 | struct spi_transfer_in bulk_in = { .read_buffer = NULL }; 496 | 497 | v_print(0, len); // verbose 498 | 499 | if (devHandle == NULL) return -1; 500 | memset(out, 0xff, WRITE_PAYLOAD_LENGTH); 501 | xferBulkIn = libusb_alloc_transfer(0); 502 | xferBulkOut = libusb_alloc_transfer(0); 503 | 504 | printf("Write started!\n"); 505 | while (len > 0) { 506 | v_print(1, len); 507 | 508 | out[0] = 0x06; // Write enable 509 | ret = ch341SpiStream(out, in, 1); 510 | ch341SpiCs(out, true); 511 | idx = CH341_PACKET_LENGTH; 512 | out[idx++] = CH341A_CMD_SPI_STREAM; 513 | out[idx++] = swapByte(fourbyte? 0x12: 0x02); 514 | if (fourbyte) 515 | out[idx++] = swapByte(add >> 24); 516 | out[idx++] = swapByte(add >> 16); 517 | out[idx++] = swapByte(add >> 8); 518 | out[idx++] = swapByte(add); 519 | 520 | tmp = 0; 521 | pkg_count = 1; 522 | 523 | while ((idx < WRITE_PAYLOAD_LENGTH) && (len > tmp)) { 524 | if (idx % CH341_PACKET_LENGTH == 0) { 525 | out[idx++] = CH341A_CMD_SPI_STREAM; 526 | pkg_count ++; 527 | } else { 528 | out[idx++] = swapByte(*buf++); 529 | tmp++; 530 | if (((add + tmp) & 0xFF) == 0) // cross page boundary 531 | break; 532 | } 533 | } 534 | len -= tmp; 535 | add += tmp; 536 | bulk_in.bulk_count = 0; 537 | libusb_fill_bulk_transfer(xferBulkIn, devHandle, BULK_READ_ENDPOINT, in, 538 | CH341_PACKET_LENGTH, cbBulkIn, &bulk_in, DEFAULT_TIMEOUT); 539 | libusb_submit_transfer(xferBulkIn); 540 | libusb_fill_bulk_transfer(xferBulkOut, devHandle, BULK_WRITE_ENDPOINT, out, 541 | idx, cbBulkOut, NULL, DEFAULT_TIMEOUT); 542 | libusb_submit_transfer(xferBulkOut); 543 | old_counter = bulk_in.bulk_count; 544 | ret = 0; 545 | while (bulk_in.bulk_count < pkg_count) { 546 | libusb_handle_events_timeout(NULL, &tv); 547 | if (bulk_in.bulk_count == -1) { // encountered error 548 | ret = -1; 549 | break; 550 | } 551 | if (old_counter != bulk_in.bulk_count) { // new package came 552 | if (bulk_in.bulk_count != pkg_count) 553 | libusb_submit_transfer(xferBulkIn); // resubmit bulk in request 554 | old_counter = bulk_in.bulk_count; 555 | } 556 | } 557 | if (ret < 0) break; 558 | ch341SpiCs(out, false); 559 | ret = usbTransfer(__func__, BULK_WRITE_ENDPOINT, out, 3); 560 | if (ret < 0) break; 561 | out[0] = 0x04; // Write disable 562 | ret = ch341SpiStream(out, in, 1); 563 | do { 564 | ret = ch341ReadStatus(); 565 | if (ret != 0) 566 | libusb_handle_events_timeout(NULL, &tv); 567 | } while(ret != 0); 568 | if (force_stop == 1) { // user hit ctrl+C 569 | force_stop = 0; 570 | if (len > 0) 571 | fprintf(stderr, "User hit Ctrl+C, writing unfinished.\n"); 572 | break; 573 | } 574 | } 575 | libusb_free_transfer(xferBulkIn); 576 | libusb_free_transfer(xferBulkOut); 577 | 578 | v_print(2, 0); 579 | return ret; 580 | } 581 | -------------------------------------------------------------------------------- /ch341a.h: -------------------------------------------------------------------------------- 1 | /* 2 | * This file is part of the ch341prog project. 3 | * 4 | * Copyright (C) 2014 Pluto Yang (yangyj.ee@gmail.com) 5 | * 6 | * This program is free software; you can redistribute it and/or modify 7 | * it under the terms of the GNU General Public License as published by 8 | * the Free Software Foundation; either version 2 of the License, or 9 | * (at your option) any later version. 10 | * 11 | * This program is distributed in the hope that it will be useful, 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 | * GNU General Public License for more details. 15 | * 16 | * You should have received a copy of the GNU General Public License 17 | * along with this program; if not, write to the Free Software 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 19 | */ 20 | #ifndef __CH341_H__ 21 | #define __CH341_H__ 22 | 23 | #ifdef __cplusplus 24 | extern "C" { 25 | #endif 26 | #define DEFAULT_TIMEOUT 1000 // 1000mS for USB timeouts 27 | #define BULK_WRITE_ENDPOINT 0x02 28 | #define BULK_READ_ENDPOINT 0x82 29 | 30 | #define CH341_PACKET_LENGTH 0x20 31 | #define CH341_MAX_PACKETS 256 32 | #define CH341_MAX_PACKET_LEN (CH341_PACKET_LENGTH * CH341_MAX_PACKETS) 33 | #define CH341A_USB_VENDOR 0x1A86 34 | #define CH341A_USB_PRODUCT 0x5512 35 | 36 | #define CH341A_CMD_SET_OUTPUT 0xA1 37 | #define CH341A_CMD_IO_ADDR 0xA2 38 | #define CH341A_CMD_PRINT_OUT 0xA3 39 | #define CH341A_CMD_SPI_STREAM 0xA8 40 | #define CH341A_CMD_SIO_STREAM 0xA9 41 | #define CH341A_CMD_I2C_STREAM 0xAA 42 | #define CH341A_CMD_UIO_STREAM 0xAB 43 | 44 | #define CH341A_CMD_I2C_STM_STA 0x74 45 | #define CH341A_CMD_I2C_STM_STO 0x75 46 | #define CH341A_CMD_I2C_STM_OUT 0x80 47 | #define CH341A_CMD_I2C_STM_IN 0xC0 48 | #define CH341A_CMD_I2C_STM_MAX ( min( 0x3F, CH341_PACKET_LENGTH ) ) 49 | #define CH341A_CMD_I2C_STM_SET 0x60 50 | #define CH341A_CMD_I2C_STM_US 0x40 51 | #define CH341A_CMD_I2C_STM_MS 0x50 52 | #define CH341A_CMD_I2C_STM_DLY 0x0F 53 | #define CH341A_CMD_I2C_STM_END 0x00 54 | 55 | #define CH341A_CMD_UIO_STM_IN 0x00 56 | #define CH341A_CMD_UIO_STM_DIR 0x40 57 | #define CH341A_CMD_UIO_STM_OUT 0x80 58 | #define CH341A_CMD_UIO_STM_US 0xC0 59 | #define CH341A_CMD_UIO_STM_END 0x20 60 | 61 | #define CH341A_STM_I2C_20K 0x00 62 | #define CH341A_STM_I2C_100K 0x01 63 | #define CH341A_STM_I2C_400K 0x02 64 | #define CH341A_STM_I2C_750K 0x03 65 | #define CH341A_STM_SPI_DBL 0x04 66 | 67 | int32_t usbTransfer(const char * func, uint8_t type, uint8_t* buf, int len); 68 | int32_t ch341Configure(uint16_t vid, uint16_t pid); 69 | int32_t ch341SetStream(uint32_t speed); 70 | int32_t ch341SpiStream(uint8_t *out, uint8_t *in, uint32_t len); 71 | int32_t ch341SpiCapacity(void); 72 | int32_t ch341SpiRead(uint8_t *buf, uint32_t add, uint32_t len); 73 | int32_t ch341ReadStatus(void); 74 | int32_t ch341WriteStatus(uint8_t status); 75 | int32_t ch341EraseChip(void); 76 | int32_t ch341SpiWrite(uint8_t *buf, uint32_t add, uint32_t len); 77 | int32_t ch341Release(void); 78 | uint8_t swapByte(uint8_t c); 79 | 80 | #ifdef __cplusplus 81 | } 82 | #endif 83 | 84 | #endif 85 | -------------------------------------------------------------------------------- /debian/ch341prog.dirs: -------------------------------------------------------------------------------- 1 | usr/bin 2 | etc/udev/rules.d -------------------------------------------------------------------------------- /debian/ch341prog.substvars: -------------------------------------------------------------------------------- 1 | shlibs:Depends=libc6 (>= 2.4), libusb-1.0-0 (>= 2:1.0.8) 2 | misc:Depends= 3 | misc:Pre-Depends= 4 | -------------------------------------------------------------------------------- /debian/changelog: -------------------------------------------------------------------------------- 1 | ch341prog (1.0-1) UNRELEASED; urgency=medium 2 | 3 | * Initial release. (Closes: #XXXXXX) 4 | 5 | -- Anton Litvinov Thu, 22 Mar 2018 11:14:12 +0300 6 | -------------------------------------------------------------------------------- /debian/compat: -------------------------------------------------------------------------------- 1 | 9 2 | -------------------------------------------------------------------------------- /debian/control: -------------------------------------------------------------------------------- 1 | Source: ch341prog 2 | Priority: optional 3 | Maintainer: Anton Litvinov 4 | Build-Depends: debhelper (>= 9), libusb-1.0-0-dev 5 | Standards-Version: 4.1.3 6 | Section: electronics 7 | Vcs-Git: https://github.com/Zensey/ch341prog.git 8 | Vcs-Browser: https://github.com/Zensey/ch341prog 9 | 10 | Package: ch341prog 11 | Architecture: any 12 | Depends: ${shlibs:Depends}, ${misc:Depends} 13 | Description: A simple SPI/IIC programer based on ch341a 14 | 15 | -------------------------------------------------------------------------------- /debian/rules: -------------------------------------------------------------------------------- 1 | #!/usr/bin/make -f 2 | 3 | %: 4 | dh $@ 5 | 6 | override_dh_auto_install: 7 | $(MAKE) DESTDIR=$$(pwd)/debian/ch341prog prefix=/usr install -------------------------------------------------------------------------------- /debian/source/format: -------------------------------------------------------------------------------- 1 | 3.0 (native) 2 | -------------------------------------------------------------------------------- /main.c: -------------------------------------------------------------------------------- 1 | /* 2 | * This file is part of the ch341prog project. 3 | * 4 | * Copyright (C) 2014 Pluto Yang (yangyj.ee@gmail.com) 5 | * 6 | * This program is free software; you can redistribute it and/or modify 7 | * it under the terms of the GNU General Public License as published by 8 | * the Free Software Foundation; either version 2 of the License, or 9 | * (at your option) any later version. 10 | * 11 | * This program is distributed in the hope that it will be useful, 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 | * GNU General Public License for more details. 15 | * 16 | * You should have received a copy of the GNU General Public License 17 | * along with this program; if not, write to the Free Software 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 19 | * 20 | * verbose functionality forked from https://github.com/vSlipenchuk/ch341prog/commit/5afb03fe27b54dbcc88f6584417971d045dd8dab 21 | * 22 | */ 23 | 24 | #include 25 | #include 26 | #include 27 | #include 28 | #include 29 | #include 30 | #include "ch341a.h" 31 | #include 32 | #include 33 | 34 | int verbose; 35 | 36 | void v_print(int mode, int len) { // mode: begin=0, progress = 1 37 | if (!verbose) return ; 38 | 39 | static unsigned int size = 0; 40 | static time_t started,reported; 41 | unsigned int dur,done; 42 | time_t now; 43 | time(&now); 44 | 45 | switch (mode) { 46 | case 0: // setup 47 | size = len; 48 | started = reported = now; 49 | break; 50 | case 1: // progress 51 | if (now == started ) return ; 52 | 53 | dur = now - started; 54 | done = size-len; 55 | if (done > 0 && reported != now) { 56 | printf("Bytes: %d (%d%c), Time: %d, ETA: %d \r",done, 57 | (done * 100) / size, '%', dur, (int) ((1.0 * dur * size) / done-dur)); 58 | fflush(stdout); 59 | reported = now; 60 | } 61 | break; 62 | case 2: // done 63 | dur = now - started; if (dur<1) dur=1; 64 | printf("Total: %d sec, average speed %d bytes per second.\n", dur, size / dur); 65 | break; 66 | default: 67 | break; 68 | } 69 | } 70 | 71 | int main(int argc, char* argv[]) 72 | { 73 | int32_t ret; 74 | uint8_t *buf; 75 | FILE *fp; 76 | char *filename; 77 | int cap; 78 | int length = 0; 79 | char op = 0; 80 | uint32_t speed = CH341A_STM_I2C_20K; 81 | int8_t c; 82 | int offset = 0; 83 | 84 | const char usage[] = 85 | "\nUsage:\n"\ 86 | " -h, --help display this message\n"\ 87 | " -i, --info read the chip ID info\n"\ 88 | " -e, --erase erase the entire chip\n"\ 89 | " -v, --verbose print verbose info\n"\ 90 | " -l, --length manually set length\n"\ 91 | " -w, --write write chip with data from filename\n"\ 92 | " -o, --offset write data starting from specific offset\n"\ 93 | " -r, --read read chip and save data to filename\n"\ 94 | " -t, --turbo increase the i2c bus speed (-tt to use much faster speed)\n"\ 95 | " -d, --double double the spi bus speed\n"; 96 | const struct option options[] = { 97 | {"help", no_argument, 0, 'h'}, 98 | {"info", no_argument, 0, 'i'}, 99 | {"erase", no_argument, 0, 'e'}, 100 | {"write", required_argument, 0, 'w'}, 101 | {"length", required_argument, 0, 'l'}, 102 | {"verbose", no_argument, 0, 'v'}, 103 | {"write", required_argument, 0, 'w'}, 104 | {"offset", required_argument, 0, 'o'}, 105 | {"read", required_argument, 0, 'r'}, 106 | {"turbo", no_argument, 0, 't'}, 107 | {"double", no_argument, 0, 'd'}, 108 | {0, 0, 0, 0}}; 109 | 110 | int32_t optidx = 0; 111 | 112 | while ((c = getopt_long(argc, argv, "hiew:r:l:tdvo:", options, &optidx)) != -1){ 113 | switch (c) { 114 | case 'i': 115 | case 'e': 116 | if (!op) 117 | op = c; 118 | else 119 | op = 'x'; 120 | break; 121 | case 'v': 122 | verbose = 1; 123 | break; 124 | case 'w': 125 | case 'r': 126 | if (!op) { 127 | op = c; 128 | filename = (char*) malloc(strlen(optarg) + 1); 129 | strcpy(filename, optarg); 130 | } else 131 | op = 'x'; 132 | break; 133 | case 'l': 134 | length = atoi(optarg); 135 | break; 136 | case 't': 137 | if ((speed & 3) < 3) { 138 | speed++; 139 | } 140 | break; 141 | case 'd': 142 | speed |= CH341A_STM_SPI_DBL; 143 | break; 144 | case 'o': 145 | offset = atoi(optarg); 146 | break; 147 | default: 148 | printf("%s\n", usage); 149 | return 0; 150 | } 151 | } 152 | if (op == 0) { 153 | fprintf(stderr, "%s\n", usage); 154 | return 0; 155 | } 156 | if (op == 'x') { 157 | fprintf(stderr, "Conflicting options, only one option at a time.\n"); 158 | return -1; 159 | } 160 | ret = ch341Configure(CH341A_USB_VENDOR, CH341A_USB_PRODUCT); 161 | if (ret < 0) 162 | return -1; 163 | ret = ch341SetStream(speed); 164 | if (ret < 0) goto out; 165 | ret = ch341SpiCapacity(); 166 | if (ret < 0) goto out; 167 | cap = 1 << ret; 168 | printf("Chip capacity is %d bytes\n", cap); 169 | 170 | if (length != 0){ 171 | cap = length; 172 | } 173 | if (op == 'i') goto out; 174 | if (op == 'e') { 175 | uint8_t timeout = 0; 176 | ret = ch341EraseChip(); 177 | if (ret < 0) goto out; 178 | do { 179 | sleep(1); 180 | ret = ch341ReadStatus(); 181 | if (ret < 0) goto out; 182 | printf("."); 183 | fflush(stdout); 184 | timeout++; 185 | if (timeout == 100) break; 186 | } while(ret != 0); 187 | if (timeout == 100) 188 | fprintf(stderr, "Chip erase timeout.\n"); 189 | else 190 | printf("Chip erase done!\n"); 191 | } 192 | if ((op == 'r') || (op == 'w')) { 193 | buf = (uint8_t *)malloc(cap); 194 | if (!buf) { 195 | fprintf(stderr, "Malloc failed for read buffer.\n"); 196 | goto out; 197 | } 198 | } 199 | if (op == 'r') { 200 | ret = ch341SpiRead(buf, offset, cap); 201 | if (ret < 0) 202 | goto out; 203 | fp = fopen(filename, "wb"); 204 | if (!fp) { 205 | fprintf(stderr, "Couldn't open file %s for writing.\n", filename); 206 | goto out; 207 | } 208 | fwrite(buf, 1, cap, fp); 209 | if (ferror(fp)) 210 | fprintf(stderr, "Error writing file [%s]\n", filename); 211 | fclose(fp); 212 | } 213 | if (op == 'w') { 214 | fp = fopen(filename, "rb"); 215 | if (!fp) { 216 | fprintf(stderr, "Couldn't open file %s for reading.\n", filename); 217 | goto out; 218 | } 219 | ret = fread(buf, 1, cap, fp); 220 | if (ferror(fp)) { 221 | fprintf(stderr, "Error reading file [%s]\n", filename); 222 | if (fp) 223 | fclose(fp); 224 | goto out; 225 | } 226 | cap = ret; 227 | fprintf(stderr, "File Size is [%d]\n", ret); 228 | ret = ch341SpiWrite(buf, offset, ret); 229 | if (ret == 0) { 230 | printf("\nWrite ok! Try to verify... "); 231 | FILE *test_file; 232 | char *test_filename; 233 | test_filename = (char*) malloc(strlen("./test-firmware.bin") + 1); 234 | strcpy(test_filename, "./test-firmware.bin"); 235 | 236 | ret = ch341SpiRead(buf, offset, cap); 237 | test_file = fopen(test_filename, "w+b"); 238 | 239 | if (!test_file) { 240 | fprintf(stderr, "Couldn't open file %s for writing.\n", test_filename); 241 | goto out; 242 | } 243 | fwrite(buf, 1, cap, test_file); 244 | 245 | if (ferror(test_file)) 246 | fprintf(stderr, "Error writing file [%s]\n", test_filename); 247 | 248 | fseek(fp, 0, SEEK_SET); 249 | fseek(test_file, 0, SEEK_SET); 250 | 251 | int ch1, ch2; 252 | int checked_count = 0; 253 | ch1 = getc(fp); 254 | ch2 = getc(test_file); 255 | 256 | while ((ch1 != EOF) && (ch2 != EOF) && (ch1 == ch2)) { 257 | ch1 = getc(fp); 258 | ch2 = getc(test_file); 259 | checked_count++; 260 | } 261 | 262 | if (ch1 == ch2 || (checked_count == cap)) 263 | printf("\nWrite completed successfully. \n"); 264 | else 265 | printf("\nError while writing. Check your device. May be it need to be erased.\n"); 266 | 267 | if (remove(test_filename) == 0) 268 | printf("\nAll done. \n"); 269 | else 270 | printf("\nTemp file could not be deleted"); 271 | } 272 | fclose(fp); 273 | } 274 | out: 275 | ch341Release(); 276 | return 0; 277 | } 278 | --------------------------------------------------------------------------------