rt-thread/examples/ymodem/tofile.c

114 lines
2.4 KiB
C

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