114 lines
2.5 KiB
C
114 lines
2.5 KiB
C
#include <rtthread.h>
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#include <ymodem.h>
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#include <dfs_posix.h>
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#include <stdlib.h>
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#include <board.h>
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struct custom_ctx
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{
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struct rym_ctx parent;
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int fd;
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int flen;
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char fpath[256];
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};
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static enum rym_code _rym_bg(
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struct rym_ctx *ctx,
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rt_uint8_t *buf,
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rt_size_t len)
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{
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struct custom_ctx *cctx = (struct custom_ctx*)ctx;
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cctx->fpath[0] = '/';
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/* the buf should be the file name */
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strcpy(&(cctx->fpath[1]), (const char*)buf);
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cctx->fd = open(cctx->fpath, O_CREAT | O_WRONLY | O_TRUNC, 0);
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if (cctx->fd < 0)
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{
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rt_err_t err = rt_get_errno();
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rt_kprintf("error creating file: %d\n", err);
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rt_kprintf("abort transmission\n");
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return RYM_CODE_CAN;
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}
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cctx->flen = atoi((const char*)buf+strlen((const char*)buf)+1);
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if (cctx->flen == 0)
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cctx->flen = -1;
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return RYM_CODE_ACK;
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}
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static enum rym_code _rym_tof(
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struct rym_ctx *ctx,
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rt_uint8_t *buf,
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rt_size_t len)
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{
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struct custom_ctx *cctx = (struct custom_ctx*)ctx;
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RT_ASSERT(cctx->fd >= 0);
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if (cctx->flen == -1)
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{
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write(cctx->fd, buf, len);
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}
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else
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{
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int wlen = len > cctx->flen ? cctx->flen : len;
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write(cctx->fd, buf, wlen);
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cctx->flen -= wlen;
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}
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return RYM_CODE_ACK;
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}
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static enum rym_code _rym_end(
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struct rym_ctx *ctx,
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rt_uint8_t *buf,
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rt_size_t len)
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{
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struct custom_ctx *cctx = (struct custom_ctx*)ctx;
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RT_ASSERT(cctx->fd >= 0);
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close(cctx->fd);
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cctx->fd = -1;
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return RYM_CODE_ACK;
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}
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rt_err_t rym_write_to_file(rt_device_t idev)
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{
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rt_err_t res;
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struct custom_ctx *ctx = rt_malloc(sizeof(*ctx));
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RT_ASSERT(idev);
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rt_kprintf("entering RYM mode\n");
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res = rym_recv_on_device(&ctx->parent, idev, RT_DEVICE_OFLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
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_rym_bg, _rym_tof, _rym_end, 1000);
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/* there is no Ymodem traffic on the line so print out info. */
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rt_kprintf("leaving RYM mode with code %d\n", res);
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rt_kprintf("file %s has been created.\n", ctx->fpath);
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rt_free(ctx);
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return res;
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}
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#ifdef RT_USING_FINSH
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#include <finsh.h>
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rt_err_t ry(char *dname)
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{
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rt_err_t res;
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rt_device_t dev = rt_device_find(dname);
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if (!dev)
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{
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rt_kprintf("could not find device:%s\n", dname);
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return -RT_ERROR;
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}
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res = rym_write_to_file(dev);
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return res;
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}
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FINSH_FUNCTION_EXPORT(ry, receive files by ymodem protocol);
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#endif
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