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560 lines
14 KiB
560 lines
14 KiB
/*
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* COPYRIGHT (C) 2011-2023, Real-Thread Information Technology Ltd
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* All rights reserved
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2013-04-14 Grissiom initial implementation
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* 2019-12-09 Steven Liu add YMODEM send protocol
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*
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* Radkil adapted in 2026: 移除 RT-Thread 依赖, 使用 rd_time/Rd_Delay
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*/
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#include "ymodem.h"
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#ifdef YMODEM_USING_CRC_TABLE
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static const uint16_t ccitt_table[256] =
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{
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0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,
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0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,
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0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,
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0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,
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0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,
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0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,
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0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,
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0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,
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0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
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0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,
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0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
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0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,
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0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,
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0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,
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0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
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0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,
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0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,
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0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
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0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,
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0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,
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0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,
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0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
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0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,
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0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,
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0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,
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0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,
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0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
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0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,
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0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,
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0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
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0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,
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0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
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};
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static uint16_t CRC16(unsigned char *q, int len)
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{
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uint16_t crc = 0;
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while (len-- > 0)
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crc = (crc << 8) ^ ccitt_table[((crc >> 8) ^ *q++) & 0xff];
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return crc;
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}
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#else
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static uint16_t CRC16(unsigned char *q, int len)
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{
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uint16_t crc;
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char i;
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crc = 0;
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while (--len >= 0)
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{
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crc = crc ^ (int) * q++ << 8;
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i = 8;
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do
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{
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if (crc & 0x8000)
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crc = crc << 1 ^ 0x1021;
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else
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crc = crc << 1;
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}
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while (--i);
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}
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return (crc);
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}
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#endif
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/* SOH/STX + seq + payload + crc */
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#define _RYM_SOH_PKG_SZ (1+2+128+2)
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#define _RYM_STX_PKG_SZ (1+2+1024+2)
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static enum rym_code _rym_read_code(struct rym_ctx *ctx, uint32_t timeout_ms)
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{
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uint32_t start = Rd_GetTime();
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while (Rd_GetTime() - start < timeout_ms)
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{
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size_t rsz = ctx->dev.read(ctx->dev.opaque, ctx->buf, 1);
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if (rsz == 1)
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return (enum rym_code)(*ctx->buf);
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Rd_Delay(1);
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}
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return RYM_CODE_NONE;
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}
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static ssize_t _rym_read_data(struct rym_ctx *ctx, size_t len)
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{
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uint8_t *buf = ctx->buf + 1;
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size_t readlen = 0;
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uint32_t start = Rd_GetTime();
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while (Rd_GetTime() - start < RYM_WAIT_CHR_MS)
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{
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size_t n = ctx->dev.read(ctx->dev.opaque, buf + readlen, len - readlen);
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readlen += n;
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if (readlen >= len)
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return readlen;
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Rd_Delay(1);
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}
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return readlen;
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}
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static int _rym_send_packet(struct rym_ctx *ctx, enum rym_code code, uint8_t index)
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{
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uint16_t send_crc;
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uint8_t index_inv = ~index;
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size_t packetlen = 0;
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switch (code)
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{
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case RYM_CODE_SOH:
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packetlen = _RYM_SOH_PKG_SZ;
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break;
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case RYM_CODE_STX:
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packetlen = _RYM_STX_PKG_SZ;
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break;
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default:
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return RD_FAILURE;
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}
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send_crc = CRC16(ctx->buf + 3, packetlen - 5);
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ctx->buf[0] = code;
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ctx->buf[1] = index;
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ctx->buf[2] = index_inv;
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ctx->buf[packetlen - 2] = (uint8_t)(send_crc >> 8);
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ctx->buf[packetlen - 1] = (uint8_t)send_crc & 0xff;
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size_t writelen = 0;
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do
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{
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size_t n = ctx->dev.write(ctx->dev.opaque, ctx->buf + writelen, packetlen - writelen);
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writelen += n;
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}
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while (writelen < packetlen);
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return RD_SUCCESS;
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}
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static void _rym_putchar(struct rym_ctx *ctx, uint8_t code)
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{
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ctx->dev.write(ctx->dev.opaque, &code, 1);
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}
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static uint8_t _rym_getchar(struct rym_ctx *ctx)
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{
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uint8_t c;
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/* rd_ComRead 内部阻塞等待数据, 此处只需重试即可 */
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while (ctx->dev.read(ctx->dev.opaque, &c, 1) != 1)
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{
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Rd_Delay(1);
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}
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return c;
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}
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static int _rym_do_handshake(struct rym_ctx *ctx, int tm_sec)
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{
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enum rym_code code;
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size_t i;
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uint16_t recv_crc, cal_crc;
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size_t data_sz = 0;
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uint32_t start, deadline;
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ctx->stage = RYM_STAGE_ESTABLISHING;
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for (i = 0; i < (size_t)tm_sec; i++)
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{
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_rym_putchar(ctx, RYM_CODE_C);
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code = _rym_read_code(ctx, RYM_CHD_INTV_MS);
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if (code == RYM_CODE_SOH)
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{
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data_sz = _RYM_SOH_PKG_SZ;
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break;
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}
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else if (code == RYM_CODE_STX)
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{
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data_sz = _RYM_STX_PKG_SZ;
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break;
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}
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}
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if (i == (size_t)tm_sec)
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return -RYM_ERR_TMO;
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/* 接收剩余数据 */
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i = 0;
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start = Rd_GetTime();
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deadline = start + 100;
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while (Rd_GetTime() <= deadline && i < (data_sz - 1))
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{
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i += _rym_read_data(ctx, data_sz - 1);
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Rd_Delay(5);
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}
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if (i != (data_sz - 1))
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return -RYM_ERR_DSZ;
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if (ctx->buf[1] != 0 || ctx->buf[2] != 0xFF)
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return -RYM_ERR_SEQ;
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recv_crc = (uint16_t)(*(ctx->buf + data_sz - 2) << 8) | *(ctx->buf + data_sz - 1);
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cal_crc = CRC16(ctx->buf + 3, data_sz - 5);
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if (recv_crc != cal_crc)
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return -RYM_ERR_CRC;
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if (ctx->on_begin && ctx->on_begin(ctx, ctx->buf + 3, data_sz - 5) != RYM_CODE_ACK)
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return -RYM_ERR_CAN;
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return RD_SUCCESS;
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}
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static int _rym_do_send_handshake(struct rym_ctx *ctx, int tm_sec)
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{
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enum rym_code code;
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size_t i;
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size_t data_sz;
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uint8_t getc_ack;
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ctx->stage = RYM_STAGE_ESTABLISHING;
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data_sz = _RYM_SOH_PKG_SZ;
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for (i = 0; i < (size_t)tm_sec; i++)
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{
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code = _rym_read_code(ctx, RYM_CHD_INTV_MS);
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if (code == RYM_CODE_C)
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break;
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}
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if (i == (size_t)tm_sec)
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return -RYM_ERR_TMO;
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if (ctx->on_begin && ctx->on_begin(ctx, ctx->buf + 3, data_sz - 5) != RYM_CODE_SOH)
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return -RYM_ERR_CODE;
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_rym_send_packet(ctx, RYM_CODE_SOH, 0);
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getc_ack = _rym_getchar(ctx);
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if (getc_ack != RYM_CODE_ACK)
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return -RYM_ERR_ACK;
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getc_ack = _rym_getchar(ctx);
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if (getc_ack != RYM_CODE_C)
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return -RYM_ERR_ACK;
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ctx->stage = RYM_STAGE_ESTABLISHED;
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return RD_SUCCESS;
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}
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static int _rym_trans_data(struct rym_ctx *ctx, size_t data_sz, enum rym_code *code)
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{
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const size_t tsz = 2 + data_sz + 2;
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uint16_t recv_crc;
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size_t i = _rym_read_data(ctx, tsz);
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if (i != tsz)
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return -RYM_ERR_DSZ;
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if ((ctx->buf[1] + ctx->buf[2]) != 0xFF)
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return -RYM_ERR_SEQ;
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if (ctx->stage == RYM_STAGE_ESTABLISHED && ctx->buf[1] == 0x00)
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{
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*code = RYM_CODE_NONE;
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return RD_SUCCESS;
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}
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ctx->stage = RYM_STAGE_TRANSMITTING;
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recv_crc = (uint16_t)(*(ctx->buf + tsz - 1) << 8) | *(ctx->buf + tsz);
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if (recv_crc != CRC16(ctx->buf + 3, data_sz))
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return -RYM_ERR_CRC;
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if (ctx->on_data)
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*code = ctx->on_data(ctx, ctx->buf + 3, data_sz);
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else
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*code = RYM_CODE_ACK;
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return RD_SUCCESS;
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}
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static int _rym_do_trans(struct rym_ctx *ctx)
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{
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_rym_putchar(ctx, RYM_CODE_ACK);
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_rym_putchar(ctx, RYM_CODE_C);
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ctx->stage = RYM_STAGE_ESTABLISHED;
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size_t errors = 0;
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while (1)
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{
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int err;
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enum rym_code code;
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size_t data_sz, i;
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code = _rym_read_code(ctx, RYM_WAIT_PKG_MS);
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switch (code)
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{
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case RYM_CODE_SOH:
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data_sz = 128;
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break;
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case RYM_CODE_STX:
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data_sz = 1024;
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break;
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case RYM_CODE_EOT:
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return RD_SUCCESS;
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default:
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errors++;
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if (errors > RYM_MAX_ERRORS)
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return -RYM_ERR_CODE;
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_rym_putchar(ctx, RYM_CODE_NAK);
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continue;
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}
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err = _rym_trans_data(ctx, data_sz, &code);
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if (err != RD_SUCCESS)
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{
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errors++;
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if (errors > RYM_MAX_ERRORS)
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return err;
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_rym_putchar(ctx, RYM_CODE_NAK);
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continue;
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}
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errors = 0;
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switch (code)
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{
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case RYM_CODE_CAN:
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for (i = 0; i < RYM_END_SESSION_SEND_CAN_NUM; i++)
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_rym_putchar(ctx, RYM_CODE_CAN);
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return -RYM_ERR_CAN;
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case RYM_CODE_ACK:
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_rym_putchar(ctx, RYM_CODE_ACK);
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break;
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default:
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break;
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}
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}
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}
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static int _rym_do_send_trans(struct rym_ctx *ctx)
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{
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ctx->stage = RYM_STAGE_TRANSMITTING;
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enum rym_code code;
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uint32_t index = 1;
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uint8_t getc_ack;
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size_t data_sz = _RYM_STX_PKG_SZ;
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while (1)
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{
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if (!ctx->on_data)
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return -RYM_ERR_CODE;
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code = ctx->on_data(ctx, ctx->buf + 3, data_sz - 5);
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_rym_send_packet(ctx, code, index);
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index++;
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getc_ack = _rym_getchar(ctx);
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if (getc_ack != RYM_CODE_ACK)
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return -RYM_ERR_ACK;
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if (ctx->stage == RYM_STAGE_FINISHING)
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break;
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}
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return RD_SUCCESS;
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}
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static int _rym_do_fin(struct rym_ctx *ctx)
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{
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enum rym_code code;
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uint16_t recv_crc;
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size_t i;
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size_t data_sz;
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ctx->stage = RYM_STAGE_FINISHING;
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if (ctx->on_end)
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ctx->on_end(ctx, ctx->buf + 3, 128);
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_rym_putchar(ctx, RYM_CODE_NAK);
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code = _rym_read_code(ctx, RYM_WAIT_PKG_MS);
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if (code != RYM_CODE_EOT)
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return -RYM_ERR_CODE;
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_rym_putchar(ctx, RYM_CODE_ACK);
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_rym_putchar(ctx, RYM_CODE_C);
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code = _rym_read_code(ctx, RYM_WAIT_PKG_MS);
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if (code == RYM_CODE_SOH)
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data_sz = _RYM_SOH_PKG_SZ;
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else if (code == RYM_CODE_STX)
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data_sz = _RYM_STX_PKG_SZ;
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else
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return -RYM_ERR_CODE;
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i = _rym_read_data(ctx, data_sz - 1);
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if (i != (data_sz - 1))
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return -RYM_ERR_DSZ;
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if (ctx->buf[1] != 0 || ctx->buf[2] != 0xFF)
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return -RYM_ERR_SEQ;
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recv_crc = (uint16_t)(*(ctx->buf + data_sz - 2) << 8) | *(ctx->buf + data_sz - 1);
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if (recv_crc != CRC16(ctx->buf + 3, data_sz - 5))
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return -RYM_ERR_CRC;
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/* 多文件传输 */
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if (ctx->buf[3] != 0)
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{
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if (ctx->on_begin && ctx->on_begin(ctx, ctx->buf + 3, data_sz - 5) != RYM_CODE_ACK)
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return -RYM_ERR_CAN;
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return RD_SUCCESS;
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}
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ctx->stage = RYM_STAGE_FINISHED;
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_rym_putchar(ctx, RYM_CODE_ACK);
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return RD_SUCCESS;
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}
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static int _rym_do_send_fin(struct rym_ctx *ctx)
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{
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size_t data_sz;
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uint8_t index = 0;
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uint8_t getc_ack;
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data_sz = _RYM_SOH_PKG_SZ;
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_rym_putchar(ctx, RYM_CODE_EOT);
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getc_ack = _rym_getchar(ctx);
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if (getc_ack != RYM_CODE_NAK)
|
|
return -RYM_ERR_ACK;
|
|
|
|
_rym_putchar(ctx, RYM_CODE_EOT);
|
|
getc_ack = _rym_getchar(ctx);
|
|
if (getc_ack != RYM_CODE_ACK)
|
|
return -RYM_ERR_ACK;
|
|
|
|
getc_ack = _rym_getchar(ctx);
|
|
if (getc_ack != RYM_CODE_C)
|
|
return -RYM_ERR_ACK;
|
|
|
|
if (ctx->on_end && ctx->on_end(ctx, ctx->buf + 3, data_sz - 5) != RYM_CODE_SOH)
|
|
return -RYM_ERR_CODE;
|
|
|
|
_rym_send_packet(ctx, RYM_CODE_SOH, index);
|
|
ctx->stage = RYM_STAGE_FINISHED;
|
|
return RD_SUCCESS;
|
|
}
|
|
|
|
static int _rym_do_recv(struct rym_ctx *ctx, int handshake_timeout)
|
|
{
|
|
int err;
|
|
|
|
ctx->stage = RYM_STAGE_NONE;
|
|
ctx->buf = RD_MALLOC(_RYM_STX_PKG_SZ);
|
|
if (ctx->buf == NULL)
|
|
return RD_FAILURE;
|
|
|
|
err = _rym_do_handshake(ctx, handshake_timeout);
|
|
if (err != RD_SUCCESS)
|
|
{
|
|
RD_FREE(ctx->buf);
|
|
ctx->buf = NULL;
|
|
return err;
|
|
}
|
|
|
|
while (1)
|
|
{
|
|
err = _rym_do_trans(ctx);
|
|
err = _rym_do_fin(ctx);
|
|
if (err != RD_SUCCESS)
|
|
{
|
|
RD_FREE(ctx->buf);
|
|
ctx->buf = NULL;
|
|
return err;
|
|
}
|
|
if (ctx->stage == RYM_STAGE_FINISHED)
|
|
break;
|
|
}
|
|
|
|
RD_FREE(ctx->buf);
|
|
ctx->buf = NULL;
|
|
return err;
|
|
}
|
|
|
|
static int _rym_do_send(struct rym_ctx *ctx, int handshake_timeout)
|
|
{
|
|
int err;
|
|
|
|
ctx->stage = RYM_STAGE_NONE;
|
|
ctx->buf = RD_MALLOC(_RYM_STX_PKG_SZ);
|
|
if (ctx->buf == NULL)
|
|
return RD_FAILURE;
|
|
|
|
err = _rym_do_send_handshake(ctx, handshake_timeout);
|
|
if (err != RD_SUCCESS) goto __exit;
|
|
|
|
err = _rym_do_send_trans(ctx);
|
|
if (err != RD_SUCCESS) goto __exit;
|
|
|
|
err = _rym_do_send_fin(ctx);
|
|
|
|
__exit:
|
|
RD_FREE(ctx->buf);
|
|
ctx->buf = NULL;
|
|
return err;
|
|
}
|
|
|
|
int rym_recv_on_device(
|
|
struct rym_ctx *ctx,
|
|
rym_device_t *dev,
|
|
rym_callback on_begin,
|
|
rym_callback on_data,
|
|
rym_callback on_end,
|
|
int handshake_timeout_sec)
|
|
{
|
|
int res;
|
|
|
|
RD_MEMSET(ctx, 0, sizeof(*ctx));
|
|
ctx->on_begin = on_begin;
|
|
ctx->on_data = on_data;
|
|
ctx->on_end = on_end;
|
|
RD_MEMCPY(&ctx->dev, dev, sizeof(rym_device_t));
|
|
|
|
res = _rym_do_recv(ctx, handshake_timeout_sec);
|
|
|
|
return res;
|
|
}
|
|
|
|
int rym_send_on_device(
|
|
struct rym_ctx *ctx,
|
|
rym_device_t *dev,
|
|
rym_callback on_begin,
|
|
rym_callback on_data,
|
|
rym_callback on_end,
|
|
int handshake_timeout_sec)
|
|
{
|
|
int res;
|
|
|
|
RD_MEMSET(ctx, 0, sizeof(*ctx));
|
|
ctx->on_begin = on_begin;
|
|
ctx->on_data = on_data;
|
|
ctx->on_end = on_end;
|
|
RD_MEMCPY(&ctx->dev, dev, sizeof(rym_device_t));
|
|
|
|
res = _rym_do_send(ctx, handshake_timeout_sec);
|
|
|
|
return res;
|
|
}
|