├── COPYING ├── README.md ├── ch341eeprom.c ├── ch341eeprom.h ├── ch341funcs.c └── mktestimg.c /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. By contrast, 15 | the GNU General Public License is intended to guarantee your freedom to 16 | share and change all versions of a program--to make sure it remains free 17 | software for all its users. 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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 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | 2 | About 3 | ===== 4 | 5 | Beta libusb code for EEPROM programmers based on the WinChipHead CH341a IC 6 | 7 | Author 8 | ====== 9 | 10 | Written by asbokid and released under the terms of the GNU GPL, version 3, or later. 11 | 12 | Copyright Dec 2011, asbokid 13 | 14 | Licence 15 | ======= 16 | 17 | This is free software: you can redistribute it and/or modify it under the terms of 18 | the latest GNU General Public License as published by the Free Software Foundation. 19 | 20 | This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 21 | without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 22 | See the GNU General Public License for more details. 23 | 24 | You should have received a copy of the GNU General Public License along with this program. 25 | If not, see . 26 | 27 | Requires 28 | ======== 29 | 30 | gcc 31 | GNU make 32 | libusb-1.0 and the libusb library development files. See http://libusb.wiki.sourceforge.net/ 33 | libusb-1.0-dev (on debian-based distros) 34 | 35 | Compiling 36 | ========= 37 | 38 | gcc -o ch341eeprom ch341eeprom.c ch341funcs.c -lusb-1.0 39 | 40 | Running 41 | ======= 42 | 43 | asbokid@u50si1:$ ./ch341eeprom 44 | 45 | ch341eeprom - an i2c EEPROM programming tool for the WCH CH341a IC 46 | Version 0.5 copyright (c) 2011 asbokid 47 | 48 | This program comes with asbolutely no warranty; This is free software, 49 | and you are welcome to redistribute it under certain conditions: 50 | GNU GPL v3 License: http://www.gnu.org/licenses/gpl.html 51 | 52 | Usage: 53 | -h, --help display this text 54 | -v, --verbose verbose output 55 | -d, --debug debug output 56 | -s, --size size of EEPROM {24c32|24c64} 57 | -e, --erase erase EEPROM (fill with 0xff) 58 | -w, --write write EEPROM with image from filename 59 | -r, --read read EEPROM and save image to filename 60 | 61 | Example: ch341eeprom -v -s 24c64 -w bootrom.bin 62 | 63 | asbokid@u50si1:$ sudo ./ch341eeprom -v -s 24c64 -e 64 | 65 | Searching USB buses for WCH CH341a i2c EEPROM programmer [1a86:5512] 66 | Found [1a86:5512] as device [7] on USB bus [2] 67 | Opened device [1a86:5512] 68 | Claimed device interface [0] 69 | Device reported its revision [3.03] 70 | Configured USB device 71 | Set i2c bus speed to [100kHz] 72 | Erased [8192] bytes of [24c64] EEPROM 73 | Closed USB device 74 | 75 | asbokid@u50si1:$ sudo ./ch341eeprom -v -s 24c64 -r output.bin 76 | 77 | Searching USB buses for WCH CH341a i2c EEPROM programmer [1a86:5512] 78 | Found [1a86:5512] as device [7] on USB bus [2] 79 | Opened device [1a86:5512] 80 | Claimed device interface [0] 81 | Device reported its revision [3.03] 82 | Configured USB device 83 | Set i2c bus speed to [100kHz] 84 | Read [8192] bytes from [24c64] EEPROM 85 | Wrote [8192] bytes to file [output.bin] 86 | Closed USB device 87 | 88 | asbokid@u50si1:$ xxd -l 128 output.bin 89 | 90 | 0000000: ffff ffff ffff ffff ffff ffff ffff ffff ................ 91 | 0000010: ffff ffff ffff ffff ffff ffff ffff ffff ................ 92 | 0000020: ffff ffff ffff ffff ffff ffff ffff ffff ................ 93 | 0000030: ffff ffff ffff ffff ffff ffff ffff ffff ................ 94 | 0000040: ffff ffff ffff ffff ffff ffff ffff ffff ................ 95 | 0000050: ffff ffff ffff ffff ffff ffff ffff ffff ................ 96 | 0000060: ffff ffff ffff ffff ffff ffff ffff ffff ................ 97 | 0000070: ffff ffff ffff ffff ffff ffff ffff ffff ................ 98 | 99 | asbokid@u50si1:$ ./mktestimg > testimg24c64.bin 100 | 101 | asbokid@u50si1:$ xxd -l 128 testimg24c64.bin 102 | 103 | 0000000: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 104 | 0000010: 1111 1111 1111 1111 1111 1111 1111 1111 ................ 105 | 0000020: 2222 2222 2222 2222 2222 2222 2222 2222 """""""""""""""" 106 | 0000030: 3333 3333 3333 3333 3333 3333 3333 3333 3333333333333333 107 | 0000040: 4444 4444 4444 4444 4444 4444 4444 4444 DDDDDDDDDDDDDDDD 108 | 0000050: 5555 5555 5555 5555 5555 5555 5555 5555 UUUUUUUUUUUUUUUU 109 | 0000060: 6666 6666 6666 6666 6666 6666 6666 6666 ffffffffffffffff 110 | 0000070: 7777 7777 7777 7777 7777 7777 7777 7777 wwwwwwwwwwwwwwww 111 | 112 | asbokid@u50si1:$ sudo ./ch341eeprom -v -s 24c64 -w testimg24c64.bin 113 | 114 | Searching USB buses for WCH CH341a i2c EEPROM programmer [1a86:5512] 115 | Found [1a86:5512] as device [7] on USB bus [2] 116 | Opened device [1a86:5512] 117 | Claimed device interface [0] 118 | Device reported its revision [3.03] 119 | Configured USB device 120 | Set i2c bus speed to [100kHz] 121 | Read [8192] bytes from file [testimg24c64.bin] 122 | Wrote [8192] bytes to [24c64] EEPROM 123 | Closed USB device 124 | 125 | asbokid@u50si1:$ sudo ./ch341eeprom -v -s 24c64 -r output.bin 126 | 127 | Searching USB buses for WCH CH341a i2c EEPROM programmer [1a86:5512] 128 | Found [1a86:5512] as device [7] on USB bus [2] 129 | Opened device [1a86:5512] 130 | Claimed device interface [0] 131 | Device reported its revision [3.03] 132 | Configured USB device 133 | Set i2c bus speed to [100kHz] 134 | Read [8192] bytes from [24c64] EEPROM 135 | Wrote [8192] bytes to file [output.bin] 136 | Closed USB device 137 | 138 | asbokid@u50si1:$ xxd -l 128 output.bin 139 | 140 | 0000000: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 141 | 0000010: 1111 1111 1111 1111 1111 1111 1111 1111 ................ 142 | 0000020: 2222 2222 2222 2222 2222 2222 2222 2222 """""""""""""""" 143 | 0000030: 3333 3333 3333 3333 3333 3333 3333 3333 3333333333333333 144 | 0000040: 4444 4444 4444 4444 4444 4444 4444 4444 DDDDDDDDDDDDDDDD 145 | 0000050: 5555 5555 5555 5555 5555 5555 5555 5555 UUUUUUUUUUUUUUUU 146 | 0000060: 6666 6666 6666 6666 6666 6666 6666 6666 ffffffffffffffff 147 | 0000070: 7777 7777 7777 7777 7777 7777 7777 7777 wwwwwwwwwwwwwwww 148 | 149 | 150 | Concluding Notes 151 | ================ 152 | 153 | The code handles the 3 byte addressing used by EEPROMS of 32kbit and greater (24c32-) 154 | It uses asynchronous USB transfers but should be portable to Microsoft Windows. 155 | 156 | All comments and contributions welcomed! 157 | 158 | asbokid - Dec 2011 159 | -------------------------------------------------------------------------------- /ch341eeprom.c: -------------------------------------------------------------------------------- 1 | // 2 | // ch341eeprom programmer version 0.1 (Beta) 3 | // 4 | // Programming tool for the 24Cxx serial EEPROMs using the Winchiphead CH341A IC 5 | // 6 | // (c) December 2011 asbokid 7 | // 8 | // This program is free software: you can redistribute it and/or modify 9 | // it under the terms of the GNU General Public License as published by 10 | // the Free Software Foundation, either version 3 of the License, or 11 | // (at your option) any later version. 12 | // 13 | // This program is distributed in the hope that it will be useful, 14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 | // GNU General Public License for more details. 17 | // 18 | // You should have received a copy of the GNU General Public License 19 | // along with this program. If not, see . 20 | 21 | #include 22 | #include 23 | #include 24 | #include 25 | #include 26 | #include 27 | #include 28 | #include 29 | #include "ch341eeprom.h" 30 | 31 | FILE *debugout, *verbout; 32 | uint8_t *readbuf = NULL; 33 | 34 | int main(int argc, char **argv) { 35 | int i, ret = 0, eepromsize = 0, bytesread = 0; 36 | uint8_t debug = FALSE, verbose = FALSE; 37 | struct libusb_device_handle *devHandle = NULL; 38 | char *filename = NULL, eepromname[12], operation = 0; 39 | FILE *fp; 40 | 41 | static char version_msg[] = 42 | "ch341eeprom - an i2c EEPROM programming tool for the WCH CH341a IC\n" \ 43 | "Version " CH341TOOLVERSION " copyright (c) 2011 asbokid \n\n" \ 44 | "This program comes with asbolutely no warranty; This is free software,\n" \ 45 | "and you are welcome to redistribute it under certain conditions:\n" \ 46 | "GNU GPL v3 License: http://www.gnu.org/licenses/gpl.html\n"; 47 | 48 | static char usage_msg[] = 49 | "Usage:\n" \ 50 | " -h, --help display this text\n" \ 51 | " -v, --verbose verbose output\n" \ 52 | " -d, --debug debug output\n" \ 53 | " -s, --size size of EEPROM {24c32|24c64}\n" \ 54 | " -e, --erase erase EEPROM (fill with 0xff)\n" \ 55 | " -w, --write write EEPROM with image from filename\n" \ 56 | " -r, --read read EEPROM and save image to filename\n\n" \ 57 | "Example: ch341eeprom -v -s 24c64 -w bootrom.bin\n"; 58 | 59 | static struct option longopts[] = { 60 | {"help", no_argument, 0, 'h'}, 61 | {"verbose", no_argument, 0, 'v'}, 62 | {"debug", no_argument, 0, 'd'}, 63 | {"erase", no_argument, 0, 'e'}, 64 | {"size", required_argument, 0, 's'}, 65 | {"read", required_argument, 0, 'r'}, 66 | {"write", required_argument, 0, 'w'}, 67 | {0, 0, 0, 0} 68 | }; 69 | 70 | while (TRUE) { 71 | int32_t optidx = 0; 72 | int8_t c = getopt_long(argc,argv,"hvdes:w:r:", longopts, &optidx); 73 | if (c == -1) 74 | break; 75 | 76 | switch (c) { 77 | case 'h': fprintf(stdout, "%s\n%s", version_msg, usage_msg); 78 | return 0; 79 | case 'v': verbose = TRUE; 80 | break; 81 | case 'd': debug = TRUE; 82 | break; 83 | case 's': if((eepromsize = parseEEPsize(optarg)) > 0) 84 | strncpy(eepromname, optarg, 10); 85 | break; 86 | case 'e': if(!operation) 87 | operation = 'e'; 88 | else { 89 | fprintf(stderr, "Conflicting command line options\n"); 90 | goto shutdown; 91 | } 92 | break; 93 | case 'r': if(!operation) { 94 | operation = 'r'; 95 | filename = (char *) malloc(strlen(optarg)+1); 96 | strcpy(filename, optarg); 97 | } else { 98 | fprintf(stderr, "Conflicting command line options\n"); 99 | goto shutdown; 100 | } 101 | break; 102 | case 'w': if(!operation) { 103 | operation = 'w'; 104 | filename = (char *) malloc(strlen(optarg)+1); 105 | strcpy(filename, optarg); 106 | } else { 107 | fprintf(stderr, "Conflicting command line options\n"); 108 | goto shutdown; 109 | } 110 | break; 111 | default : 112 | case '?': fprintf(stdout, "%s", version_msg); 113 | fprintf(stderr, "%s", usage_msg); 114 | goto shutdown; 115 | } 116 | } 117 | 118 | debugout = (debug == TRUE) ? stdout : fopen("/dev/null","w"); 119 | verbout = (verbose == TRUE) ? stdout : fopen("/dev/null","w"); 120 | fprintf(debugout, "Debug Enabled\n"); 121 | 122 | if(!operation) { 123 | fprintf(stderr, "%s\n%s", version_msg, usage_msg); 124 | goto shutdown; 125 | } 126 | 127 | if(eepromsize <= 0) { 128 | fprintf(stderr, "Invalid EEPROM size\n"); 129 | goto shutdown; 130 | } 131 | 132 | readbuf = (uint8_t *) malloc(MAX_EEPROM_SIZE); // space to store loaded EEPROM 133 | if(!readbuf) { 134 | fprintf(stderr, "Couldnt malloc space needed for EEPROM image\n"); 135 | goto shutdown; 136 | } 137 | 138 | if(!(devHandle = ch341configure(USB_LOCK_VENDOR, USB_LOCK_PRODUCT))) { 139 | fprintf(stderr, "Couldnt configure USB device\n", USB_LOCK_VENDOR, USB_LOCK_PRODUCT); 140 | goto shutdown; 141 | } 142 | fprintf(verbout, "Configured USB device\n", USB_LOCK_VENDOR, USB_LOCK_PRODUCT); 143 | 144 | if(ch341setstream(devHandle, CH341_I2C_STANDARD_SPEED) < 0) { 145 | fprintf(stderr, "Couldnt set i2c bus speed\n"); 146 | goto shutdown; 147 | } 148 | fprintf(verbout, "Set i2c bus speed to [100kHz]\n"); 149 | 150 | switch(operation) { 151 | case 'r': // read 152 | memset(readbuf, 0xff, MAX_EEPROM_SIZE); 153 | 154 | if(ch341readEEPROM(devHandle, readbuf, eepromsize) < 0) { 155 | fprintf(stderr, "Couldnt read [%d] bytes from [%s] EEPROM\n", eepromsize, eepromname); 156 | goto shutdown; 157 | } 158 | fprintf(stdout, "Read [%d] bytes from [%s] EEPROM\n", eepromsize, eepromname); 159 | for(i=0;i eepromsize) 201 | fprintf(stdout, "Truncated to [%d] bytes for [%s] EEPROM\n", eepromsize, eepromname); 202 | 203 | if(ch341writeEEPROM(devHandle, readbuf, eepromsize) < 0) { 204 | fprintf(stderr,"Failed to write [%d] bytes from [%s] to [%s] EEPROM\n", eepromsize, filename, eepromname); 205 | goto shutdown; 206 | } 207 | fprintf(stdout, "Wrote [%d] bytes to [%s] EEPROM\n", eepromsize, eepromname); 208 | break; 209 | case 'e': // erase 210 | memset(readbuf, 0xff, MAX_EEPROM_SIZE); 211 | if(ch341writeEEPROM(devHandle, readbuf, eepromsize) < 0) { 212 | fprintf(stderr,"Failed to erase [%d] bytes of [%s] EEPROM\n", eepromsize, eepromname); 213 | goto shutdown; 214 | } 215 | fprintf(stdout, "Erased [%d] bytes of [%s] EEPROM\n", eepromsize, eepromname); 216 | break; 217 | default: 218 | fprintf(stderr, "Unknown option\n"); 219 | goto shutdown; 220 | } 221 | 222 | shutdown: 223 | if(readbuf) 224 | free(readbuf); 225 | if(filename) 226 | free(filename); 227 | if(devHandle) { 228 | libusb_release_interface(devHandle, DEFAULT_INTERFACE); 229 | fprintf(debugout, "Released device interface [%d]\n", DEFAULT_INTERFACE); 230 | libusb_close(devHandle); 231 | fprintf(verbout, "Closed USB device\n"); 232 | libusb_exit(NULL); 233 | } 234 | return 0; 235 | } 236 | 237 | -------------------------------------------------------------------------------- /ch341eeprom.h: -------------------------------------------------------------------------------- 1 | // libUSB driver for the ch341a in i2c mode 2 | // 3 | // Copyright 2011 asbokid 4 | 5 | #define CH341TOOLVERSION "0.5" 6 | 7 | #define USB_LOCK_VENDOR 0x1a86 // Dev : (1a86) QinHeng Electronics 8 | #define USB_LOCK_PRODUCT 0x5512 // (5512) CH341A in i2c mode 9 | 10 | 11 | #define MAX_EEPROM_SIZE 16384 12 | 13 | #define BULK_WRITE_ENDPOINT 0x02 14 | #define BULK_READ_ENDPOINT 0x82 15 | #define DEFAULT_INTERFACE 0x00 16 | 17 | #define DEFAULT_CONFIGURATION 0x01 18 | #define DEFAULT_TIMEOUT 300 // 300mS for USB timeouts 19 | 20 | #define IN_BUF_SZ 0x100 21 | #define EEPROM_WRITE_BUF_SZ 0x2b // only for 24c64 / 24c32 ?? 22 | #define EEPROM_READ_BULKIN_BUF_SZ 0x20 23 | #define EEPROM_READ_BULKOUT_BUF_SZ 0x65 24 | 25 | // Based on (closed-source) DLL V1.9 for USB by WinChipHead (c) 2005. 26 | // Supports USB chips: CH341, CH341A 27 | 28 | #define mCH341_PACKET_LENGTH 32 29 | #define mCH341_PKT_LEN_SHORT 8 30 | 31 | #define mCH341_ENDP_INTER_UP 0x81 32 | #define mCH341_ENDP_INTER_DOWN 0x01 33 | #define mCH341_ENDP_DATA_UP 0x82 34 | #define mCH341_ENDP_DATA_DOWN 0x02 35 | 36 | #define mCH341_VENDOR_READ 0xC0 37 | #define mCH341_VENDOR_WRITE 0x40 38 | 39 | #define mCH341_PARA_INIT 0xB1 40 | #define mCH341_I2C_STATUS 0x52 41 | #define mCH341_I2C_COMMAND 0x53 42 | 43 | #define mCH341_PARA_CMD_R0 0xAC 44 | #define mCH341_PARA_CMD_R1 0xAD 45 | #define mCH341_PARA_CMD_W0 0xA6 46 | #define mCH341_PARA_CMD_W1 0xA7 47 | #define mCH341_PARA_CMD_STS 0xA0 48 | 49 | #define mCH341A_CMD_SET_OUTPUT 0xA1 50 | #define mCH341A_CMD_IO_ADDR 0xA2 51 | #define mCH341A_CMD_PRINT_OUT 0xA3 52 | #define mCH341A_CMD_SPI_STREAM 0xA8 53 | #define mCH341A_CMD_SIO_STREAM 0xA9 54 | #define mCH341A_CMD_I2C_STREAM 0xAA 55 | #define mCH341A_CMD_UIO_STREAM 0xAB 56 | 57 | #define mCH341A_BUF_CLEAR 0xB2 58 | #define mCH341A_I2C_CMD_X 0x54 59 | #define mCH341A_DELAY_MS 0x5E 60 | #define mCH341A_GET_VER 0x5F 61 | 62 | #define mCH341_EPP_IO_MAX ( mCH341_PACKET_LENGTH - 1 ) 63 | #define mCH341A_EPP_IO_MAX 0xFF 64 | 65 | #define mCH341A_CMD_IO_ADDR_W 0x00 66 | #define mCH341A_CMD_IO_ADDR_R 0x80 67 | 68 | #define mCH341A_CMD_I2C_STM_STA 0x74 69 | #define mCH341A_CMD_I2C_STM_STO 0x75 70 | #define mCH341A_CMD_I2C_STM_OUT 0x80 71 | #define mCH341A_CMD_I2C_STM_IN 0xC0 72 | #define mCH341A_CMD_I2C_STM_MAX ( min( 0x3F, mCH341_PACKET_LENGTH ) ) 73 | #define mCH341A_CMD_I2C_STM_SET 0x60 74 | #define mCH341A_CMD_I2C_STM_US 0x40 75 | #define mCH341A_CMD_I2C_STM_MS 0x50 76 | #define mCH341A_CMD_I2C_STM_DLY 0x0F 77 | #define mCH341A_CMD_I2C_STM_END 0x00 78 | 79 | #define mCH341A_CMD_UIO_STM_IN 0x00 80 | #define mCH341A_CMD_UIO_STM_DIR 0x40 81 | #define mCH341A_CMD_UIO_STM_OUT 0x80 82 | #define mCH341A_CMD_UIO_STM_US 0xC0 83 | #define mCH341A_CMD_UIO_STM_END 0x20 84 | 85 | #define mCH341_PARA_MODE_EPP 0x00 86 | #define mCH341_PARA_MODE_EPP17 0x00 87 | #define mCH341_PARA_MODE_EPP19 0x01 88 | #define mCH341_PARA_MODE_MEM 0x02 89 | 90 | 91 | #define CH341_I2C_LOW_SPEED 0 // low speed - 20kHz 92 | #define CH341_I2C_STANDARD_SPEED 1 // standard speed - 100kHz 93 | #define CH341_I2C_FAST_SPEED 2 // fast speed - 400kHz 94 | #define CH341_I2C_HIGH_SPEED 3 // high speed - 750kHz 95 | 96 | // CH341a READ EEPROM setup packet for the 24c64 97 | // this needs putting into a struct to allow convenient access to individual elements 98 | 99 | #define CH341_EEPROM_READ_SETUP_CMD "\xaa\x74\x83\xa0\x00\x00\x74\x81\xa1\xe0\x00\x00\x06\x04\x00\x00" \ 100 | "\x00\x00\x00\x00\x40\x00\x00\x00\x11\x4d\x40\x77\xcd\xab\xba\xdc" \ 101 | "\xaa\xe0\x00\x00\xc4\xf1\x12\x00\x11\x4d\x40\x77\xf0\xf1\x12\x00" \ 102 | "\xd9\x8b\x41\x7e\x00\xf0\xfd\x7f\xf0\xf1\x12\x00\x5a\x88\x41\x7e" \ 103 | "\xaa\xe0\x00\x00\x2a\x88\x41\x7e\x06\x04\x00\x00\x11\x4d\x40\x77" \ 104 | "\xe8\xf3\x12\x00\x14\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00" \ 105 | "\xaa\xdf\xc0\x75\x00" 106 | 107 | // for 24c64 108 | #define CH341_EEPROM_READ_NEXT_CMD "\xaa\x74\x83\xa0\x00\x00\x74\x81\xa1\xe0\x00\x00\x10\x00\x00\x00" \ 109 | "\x00\x00\x00\x00\x8c\xf1\x12\x00\x01\x00\x00\x00\x00\x00\x00\x00" \ 110 | "\xaa\xe0\x00\x00\x4c\xf1\x12\x00\x5d\x22\xd7\x5a\xdc\xf1\x12\x00" \ 111 | "\x8f\x04\x44\x7e\x30\x88\x41\x7e\xff\xff\xff\xff\x2a\x88\x41\x7e" \ 112 | "\xaa\xe0\x00\x7e\x00\x00\x00\x00\x69\x0e\x3c\x00\x12\x01\x19\x00" \ 113 | "\x0f\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x9c\x2e\x68\x00" \ 114 | "\xaa\xdf\xc0\x75\x00" 115 | #define CH341_EEPROM_READ_CMD_SZ 0x65 116 | 117 | #define MIN(a,b) (((a)<(b))?(a):(b)) 118 | #define MAX(a,b) (((a)>(b))?(a):(b)) 119 | 120 | #define TRUE 1 121 | #define FALSE 0 122 | 123 | struct EEPROM { 124 | char *name; 125 | uint32_t size; 126 | }; 127 | 128 | const static struct EEPROM eepromlist[] = { 129 | //{ "24c01", 128 }, // 1kbit = 128 bits 130 | //{ "24c02", 256 }, 131 | //{ "24c04", 512 }, 132 | //{ "24c08", 1024 }, 133 | //{ "24c16", 2048 }, 134 | { "24c32", 4096 }, // 32kbit = 4kbyte 135 | { "24c64", 8192 }, 136 | //{ "24c128", 16384 }, 137 | //{ "24c256", 32768 }, 138 | //{ "24c512", 65536 }, 139 | //{ "24c1024", 131072}, 140 | { 0, 0} 141 | }; 142 | 143 | 144 | int32_t ch341readEEPROM(struct libusb_device_handle *devHandle, uint8_t *buf, uint32_t bytes); 145 | int32_t ch341writeEEPROM(struct libusb_device_handle *devHandle, uint8_t *buf, uint32_t bytes); 146 | struct libusb_device_handle *ch341configure(uint16_t vid, uint16_t pid); 147 | int32_t ch341setstream(struct libusb_device_handle *devHandle, uint32_t speed); 148 | int32_t parseEEPsize(char *eepromname); 149 | 150 | // callback functions for async USB transfers 151 | void cbBulkIn(struct libusb_transfer *transfer); 152 | void cbBulkOut(struct libusb_transfer *transfer); 153 | -------------------------------------------------------------------------------- /ch341funcs.c: -------------------------------------------------------------------------------- 1 | // 2 | // ch341eeprom programmer version 0.1 (Beta) 3 | // 4 | // Programming tool for the 24Cxx serial EEPROMs using the Winchiphead CH341A IC 5 | // 6 | // (c) December 2011 asbokid 7 | // 8 | // This program is free software: you can redistribute it and/or modify 9 | // it under the terms of the GNU General Public License as published by 10 | // the Free Software Foundation, either version 3 of the License, or 11 | // (at your option) any later version. 12 | // 13 | // This program is distributed in the hope that it will be useful, 14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 | // GNU General Public License for more details. 17 | // 18 | // You should have received a copy of the GNU General Public License 19 | // along with this program. If not, see . 20 | 21 | #include 22 | #include 23 | #include 24 | #include 25 | #include 26 | #include 27 | #include "ch341eeprom.h" 28 | 29 | extern FILE *debugout, *verbout; 30 | uint32_t getnextpkt; // set by the callback function 31 | uint32_t syncackpkt; // synch / ack flag used by BULK OUT cb function 32 | uint16_t byteoffset; 33 | uint8_t *readbuf; 34 | 35 | // -------------------------------------------------------------------------- 36 | // ch341configure() 37 | // lock USB device for exclusive use 38 | // claim default interface 39 | // set default configuration 40 | // retrieve device descriptor 41 | // identify device revision 42 | // returns *usb device handle 43 | 44 | struct libusb_device_handle *ch341configure(uint16_t vid, uint16_t pid) { 45 | 46 | struct libusb_device *dev; 47 | struct libusb_device_handle *devHandle; 48 | int32_t ret=0, ret2 = 0; // set to < 0 to indicate USB errors 49 | uint32_t i = 0, j = 0; 50 | int32_t currentConfig = 0; 51 | 52 | uint8_t ch341DescriptorBuffer[0x12]; 53 | uint8_t ch341InBuffer[IN_BUF_SZ]; // 0x100 bytes in size 54 | uint8_t ch341OutBuffer[EEPROM_READ_BULKOUT_BUF_SZ]; 55 | 56 | ret = libusb_init(NULL); 57 | if(ret < 0) { 58 | fprintf(stderr, "Couldnt initialise libusb\n"); 59 | return NULL; 60 | } 61 | 62 | libusb_set_debug(NULL, 3); // maximum debug logging level 63 | 64 | fprintf(verbout, "Searching USB buses for WCH CH341a i2c EEPROM programmer [%04x:%04x]\n", 65 | USB_LOCK_VENDOR, USB_LOCK_PRODUCT); 66 | 67 | if(!(devHandle = libusb_open_device_with_vid_pid(NULL, USB_LOCK_VENDOR, USB_LOCK_PRODUCT))) { 68 | fprintf(stderr, "Couldn't open device [%04x:%04x]\n", USB_LOCK_VENDOR, USB_LOCK_PRODUCT); 69 | return NULL; 70 | } 71 | 72 | if(!(dev = libusb_get_device(devHandle))) { 73 | fprintf(stderr, "Couldnt get bus number and address of device\n"); 74 | return NULL; 75 | } 76 | 77 | fprintf(verbout, "Found [%04x:%04x] as device [%d] on USB bus [%d]\n", USB_LOCK_VENDOR, USB_LOCK_PRODUCT, 78 | libusb_get_device_address(dev), libusb_get_bus_number(dev)); 79 | 80 | fprintf(verbout, "Opened device [%04x:%04x]\n", USB_LOCK_VENDOR, USB_LOCK_PRODUCT); 81 | 82 | 83 | if(libusb_kernel_driver_active(devHandle, DEFAULT_INTERFACE)) { 84 | ret = libusb_detach_kernel_driver(devHandle, DEFAULT_INTERFACE); 85 | if(ret) { 86 | fprintf(stderr, "Failed to detach kernel driver: '%s'\n", strerror(-ret)); 87 | return NULL; 88 | } else 89 | fprintf(verbout, "Detached kernel driver\n"); 90 | } 91 | 92 | ret = libusb_get_configuration(devHandle, ¤tConfig); 93 | if(ret) { 94 | fprintf(stderr, "Failed to get current device configuration: '%s'\n", strerror(-ret)); 95 | return NULL; 96 | } 97 | 98 | if(currentConfig != DEFAULT_CONFIGURATION) 99 | ret = libusb_set_configuration(devHandle, currentConfig); 100 | 101 | if(ret) { 102 | fprintf(stderr, "Failed to set device configuration to %d: '%s'\n", DEFAULT_CONFIGURATION, strerror(-ret)); 103 | return NULL; 104 | } 105 | 106 | ret = libusb_claim_interface(devHandle, DEFAULT_INTERFACE); // interface 0 107 | 108 | if(ret) { 109 | fprintf(stderr, "Failed to claim interface %d: '%s'\n", DEFAULT_INTERFACE, strerror(-ret)); 110 | return NULL; 111 | } 112 | 113 | fprintf(verbout, "Claimed device interface [%d]\n", DEFAULT_INTERFACE); 114 | 115 | ret = libusb_get_descriptor(devHandle, LIBUSB_DT_DEVICE, 0x00, ch341DescriptorBuffer, 0x12); 116 | 117 | if(ret < 0) { 118 | fprintf(stderr, "Failed to get device descriptor: '%s'\n", strerror(-ret)); 119 | return NULL; 120 | } 121 | 122 | fprintf(verbout, "Device reported its revision [%d.%02d]\n", 123 | ch341DescriptorBuffer[12], ch341DescriptorBuffer[13]); 124 | 125 | for(i=0;i<0x12;i++) 126 | fprintf(debugout,"%02x ", ch341DescriptorBuffer[i]); 127 | fprintf(debugout,"\n"); 128 | 129 | return devHandle; 130 | } 131 | 132 | 133 | // -------------------------------------------------------------------------- 134 | // ch341setstream() 135 | // set the i2c bus speed (speed: 0 = 20kHz; 1 = 100kHz, 2 = 400kHz, 3 = 750kHz) 136 | int32_t ch341setstream(struct libusb_device_handle *devHandle, uint32_t speed) { 137 | int32_t ret, i; 138 | uint8_t ch341outBuffer[EEPROM_READ_BULKOUT_BUF_SZ], *outptr; 139 | int32_t actuallen = 0; 140 | 141 | outptr = ch341outBuffer; 142 | 143 | *outptr++ = mCH341A_CMD_I2C_STREAM; 144 | *outptr++ = mCH341A_CMD_I2C_STM_SET | (speed & 0x3); 145 | *outptr = mCH341A_CMD_I2C_STM_END; 146 | 147 | ret = libusb_bulk_transfer(devHandle, BULK_WRITE_ENDPOINT, ch341outBuffer, 3, &actuallen, DEFAULT_TIMEOUT); 148 | 149 | if(ret < 0) { 150 | fprintf(stderr, "ch341setstream(): Failed write %d bytes '%s'\n", 3, strerror(-ret)); 151 | return -1; 152 | } 153 | 154 | fprintf(debugout, "ch341setstream(): Wrote %d bytes: ", 3); 155 | for(i=0; i < 3; i++) 156 | fprintf(debugout, "%02x ", ch341outBuffer[i]); 157 | fprintf(debugout, "\n"); 158 | return 0; 159 | } 160 | 161 | // -------------------------------------------------------------------------- 162 | // ch341readEEPROM() 163 | // read n bytes from device (in packets of 32 bytes) 164 | int32_t ch341readEEPROM(struct libusb_device_handle *devHandle, uint8_t *buffer, uint32_t bytestoread) { 165 | 166 | uint8_t ch341outBuffer[EEPROM_READ_BULKOUT_BUF_SZ]; 167 | uint8_t ch341inBuffer[IN_BUF_SZ]; // 0x100 bytes 168 | int32_t ret = 0, i, exitflag = 0, readpktcount; 169 | uint32_t actuallen = 0; 170 | struct libusb_transfer *xferBulkIn, *xferBulkOut; 171 | struct timeval tv = {0, 100}; // our async polling interval 172 | 173 | xferBulkIn = libusb_alloc_transfer(0); 174 | xferBulkOut = libusb_alloc_transfer(0); 175 | 176 | if(!xferBulkIn || !xferBulkOut) { 177 | fprintf(stderr, "Couldnt allocate USB transfer structures\n"); 178 | return -1; 179 | } 180 | 181 | fprintf(debugout, "Allocated USB transfer structures\n"); 182 | 183 | memset(ch341inBuffer, 0, EEPROM_READ_BULKIN_BUF_SZ); 184 | memcpy(ch341outBuffer, CH341_EEPROM_READ_SETUP_CMD, EEPROM_READ_BULKOUT_BUF_SZ); 185 | 186 | libusb_fill_bulk_transfer(xferBulkIn, devHandle, BULK_READ_ENDPOINT, ch341inBuffer, 187 | EEPROM_READ_BULKIN_BUF_SZ, cbBulkIn, NULL, DEFAULT_TIMEOUT); 188 | 189 | libusb_fill_bulk_transfer(xferBulkOut, devHandle, BULK_WRITE_ENDPOINT, 190 | ch341outBuffer, EEPROM_READ_BULKOUT_BUF_SZ,cbBulkOut, NULL, DEFAULT_TIMEOUT); 191 | 192 | fprintf(debugout, "Filled USB transfer structures\n"); 193 | 194 | libusb_submit_transfer(xferBulkIn); 195 | fprintf(debugout, "Submitted BULK IN start packet\n"); 196 | libusb_submit_transfer(xferBulkOut); 197 | fprintf(debugout, "Submitted BULK OUT setup packet\n"); 198 | 199 | readbuf = buffer; 200 | 201 | byteoffset = 0; 202 | 203 | while (byteoffset < bytestoread) { 204 | fprintf(stdout, "Read [%d] of [%d] bytes \r", byteoffset, bytestoread); 205 | ret = libusb_handle_events_timeout(NULL, &tv); 206 | 207 | if (ret < 0 || getnextpkt == -1) { // indicates an error 208 | fprintf(stderr, "ret from libusb_handle_timeout = %d\n", ret); 209 | fprintf(stderr, "getnextpkt = %d\n", getnextpkt); 210 | fprintf(stderr, "USB read error : %s\n", strerror(-ret)); 211 | goto out_deinit; 212 | } 213 | if(getnextpkt == 1) { // callback function reports a new BULK IN packet received 214 | getnextpkt = 0; // reset the flag 215 | readpktcount++; // increment the read packet counter 216 | byteoffset += EEPROM_READ_BULKIN_BUF_SZ; 217 | fprintf(debugout, "\nRe-submitting transfer request to BULK IN endpoint\n"); 218 | libusb_submit_transfer(xferBulkIn); // re-submit request for next BULK IN packet of EEPROM data 219 | if(syncackpkt) 220 | syncackpkt = 0; 221 | // if 4th packet received, we are at end of 0x80 byte data block, 222 | // if it is not the last block, then resubmit request for data 223 | if(readpktcount==4 && byteoffset < bytestoread) { 224 | fprintf(debugout, "\nSubmitting next transfer request to BULK OUT endpoint\n"); 225 | readpktcount = 0; 226 | 227 | memcpy(ch341outBuffer, CH341_EEPROM_READ_NEXT_CMD, CH341_EEPROM_READ_CMD_SZ); 228 | ch341outBuffer[4] = (uint8_t) (byteoffset >> 8 & 0xff); // MSB (big-endian) byte address 229 | ch341outBuffer[5] = (uint8_t) (byteoffset & 0xff); // LSB of 16-bit byte address 230 | 231 | libusb_fill_bulk_transfer(xferBulkOut, devHandle, BULK_WRITE_ENDPOINT, ch341outBuffer, 232 | EEPROM_READ_BULKOUT_BUF_SZ, cbBulkOut, NULL, DEFAULT_TIMEOUT); 233 | 234 | libusb_submit_transfer(xferBulkOut);// update transfer struct (with new EEPROM page offset) 235 | // and re-submit next transfer request to BULK OUT endpoint 236 | } 237 | } 238 | } 239 | 240 | out_deinit: 241 | libusb_free_transfer(xferBulkIn); 242 | libusb_free_transfer(xferBulkOut); 243 | return 0; 244 | } 245 | 246 | // Callback function for async bulk in comms 247 | void cbBulkIn(struct libusb_transfer *transfer) { 248 | int i; 249 | 250 | switch(transfer->status) { 251 | case LIBUSB_TRANSFER_COMPLETED: 252 | // display the contents of the BULK IN data buffer 253 | fprintf(debugout,"\ncbBulkIn(): status %d - Read %d bytes\n",transfer->status,transfer->actual_length); 254 | 255 | for(i=0; i < transfer->actual_length; i++) { 256 | if(!(i%16)) 257 | fprintf(debugout, "\n "); 258 | fprintf(debugout, "%02x ", transfer->buffer[i]); 259 | } 260 | fprintf(debugout, "\n"); 261 | // copy read data to our EEPROM buffer 262 | memcpy(readbuf + byteoffset, transfer->buffer, transfer->actual_length); 263 | getnextpkt = 1; 264 | break; 265 | default: 266 | fprintf(stderr, "\ncbBulkIn: error : %d\n", transfer->status); 267 | getnextpkt = -1; 268 | } 269 | return; 270 | } 271 | 272 | // Callback function for async bulk out comms 273 | void cbBulkOut(struct libusb_transfer *transfer) { 274 | syncackpkt = 1; 275 | fprintf(debugout, "\ncbBulkOut(): Sync/Ack received: status %d\n", transfer->status); 276 | return; 277 | } 278 | 279 | // -------------------------------------------------------------------------- 280 | // ch341writeEEPROM() 281 | // write n bytes to 24c32/24c64 device (in packets of 32 bytes) 282 | int32_t ch341writeEEPROM(struct libusb_device_handle *devHandle, uint8_t *buffer, uint32_t bytesum) { 283 | 284 | uint8_t ch341outBuffer[EEPROM_WRITE_BUF_SZ], *outptr, *bufptr; 285 | int32_t ret = 0, i; 286 | uint16_t byteoffset = 0, bytes = bytesum; 287 | uint8_t addrbytecount = 3; // 24c32 and 24c64 (and other 24c??) use 3 bytes for addressing 288 | int32_t actuallen = 0; 289 | 290 | bufptr = buffer; 291 | 292 | while(bytes) { 293 | outptr = ch341outBuffer; 294 | *outptr++ = mCH341A_CMD_I2C_STREAM; 295 | *outptr++ = mCH341A_CMD_I2C_STM_STA; 296 | *outptr++ = mCH341A_CMD_I2C_STM_OUT + addrbytecount + MIN(bytes, 25); 297 | *outptr++ = 0xa0; // EEPROM device address 298 | *outptr++ = (uint8_t) (byteoffset >> 8 & 0xff); // MSB (big-endian) byte address 299 | *outptr++ = (uint8_t) (byteoffset & 0xff); // LSB of 16-bit byte address 300 | 301 | memcpy(outptr, bufptr, MIN(bytes, 25)); // payload has two parts: 25 bytes & up to 7 more bytes 302 | 303 | outptr += MIN(bytes, 25); 304 | bufptr += MIN(bytes, 25); 305 | bytes -= MIN(bytes, 25); 306 | 307 | *outptr++ = mCH341A_CMD_I2C_STM_END; 308 | 309 | if(bytes) { 310 | *outptr++ = mCH341A_CMD_I2C_STREAM; 311 | *outptr++ = mCH341A_CMD_I2C_STM_OUT + MIN(bytes, 7); 312 | memcpy(outptr, bufptr, MIN(bytes, 7)); 313 | 314 | outptr += MIN(bytes, 7); 315 | bufptr += MIN(bytes, 7); 316 | bytes -= MIN(bytes, 7); 317 | } 318 | 319 | *outptr++ = mCH341A_CMD_I2C_STM_STO; 320 | *outptr = mCH341A_CMD_I2C_STM_END; 321 | 322 | byteoffset += 0x20; 323 | 324 | for(i=0; i < EEPROM_WRITE_BUF_SZ; i++) { 325 | if(!(i%0x10)) 326 | fprintf(debugout, "\n%04x : ", i); 327 | fprintf(debugout, "%02x ", ch341outBuffer[i]); 328 | } 329 | fprintf(debugout, "\n"); 330 | 331 | ret = libusb_bulk_transfer(devHandle, BULK_WRITE_ENDPOINT, 332 | ch341outBuffer, EEPROM_WRITE_BUF_SZ, &actuallen, DEFAULT_TIMEOUT); 333 | 334 | if(ret < 0) { 335 | fprintf(stderr, "Failed to write to EEPROM: '%s'\n", strerror(-ret)); 336 | return -1; 337 | } 338 | 339 | fprintf(debugout, "Writing [aa 5a 00] to EEPROM\n"); // Magic CH341a packet! Undocumented, unknown purpose 340 | 341 | outptr = ch341outBuffer; 342 | *outptr++ = mCH341A_CMD_I2C_STREAM; 343 | *outptr++ = 0x5a; // what is this 0x5a?? 344 | *outptr++ = mCH341A_CMD_I2C_STM_END; 345 | 346 | ret = libusb_bulk_transfer(devHandle, BULK_WRITE_ENDPOINT, ch341outBuffer, 3, &actuallen, DEFAULT_TIMEOUT); 347 | 348 | if(ret < 0) { 349 | fprintf(stderr, "Failed to write to EEPROM: '%s'\n", strerror(-ret)); 350 | return -1; 351 | } 352 | fprintf(stdout, "Written [%d] of [%d] bytes \r", bytes, bytesum); 353 | } 354 | return 0; 355 | } 356 | 357 | 358 | // -------------------------------------------------------------------------- 359 | // parseEEPsize() 360 | // passed an EEPROM name (case-sensitive), returns its byte size 361 | int32_t parseEEPsize(char *eepromname) { 362 | int i; 363 | 364 | for(i=0; eepromlist[i].size; i++) 365 | if(strstr(eepromlist[i].name, eepromname)) 366 | return(eepromlist[i].size); 367 | return -1; 368 | } 369 | -------------------------------------------------------------------------------- /mktestimg.c: -------------------------------------------------------------------------------- 1 | // create a 8192 byte binary file with 'rolling' 2 | 3 | #include 4 | 5 | int main(int argc, char **argv) { 6 | int i, j; 7 | static char *hex = "\00\x11\x22\x33\x44\x55\x66\x77\x88\x99\xaa\xbb\xcc\xdd\xee\xff"; 8 | 9 | for(j=0;j<8192/16;j++) 10 | for(i=0;i<16;i++) 11 | fputc(hex[j%16], stdout); 12 | } 13 | 14 | --------------------------------------------------------------------------------