diff options
Diffstat (limited to 'components')
| -rw-r--r-- | components/drivers/include/rtdevice.h | 2 | ||||
| -rw-r--r-- | components/drivers/src/pipe.c | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/components/drivers/include/rtdevice.h b/components/drivers/include/rtdevice.h index 60d4dc1e8a..8ed9f34ca4 100644 --- a/components/drivers/include/rtdevice.h +++ b/components/drivers/include/rtdevice.h @@ -114,6 +114,8 @@ struct rt_pipe_device struct rt_portal_device *read_portal; }; +#define PIPE_CTRL_GET_SPACE 0x14 /**< get the remaining size of a pipe device */ + #define RT_DATAQUEUE_EVENT_UNKNOWN 0x00 #define RT_DATAQUEUE_EVENT_POP 0x01 #define RT_DATAQUEUE_EVENT_PUSH 0x02 diff --git a/components/drivers/src/pipe.c b/components/drivers/src/pipe.c index 8a6c97aabf..f438a92898 100644 --- a/components/drivers/src/pipe.c +++ b/components/drivers/src/pipe.c @@ -190,6 +190,8 @@ static rt_size_t rt_pipe_write(rt_device_t dev, static rt_err_t rt_pipe_control(rt_device_t dev, rt_uint8_t cmd, void *args) { + if (cmd == PIPE_CTRL_GET_SPACE && args) + *(rt_size_t*)args = rt_ringbuffer_space_len(&PIPE_DEVICE(dev)->ringbuffer); return RT_EOK; } |