From f6d1216667594c17d9c4b0a1a396952b96bc8553 Mon Sep 17 00:00:00 2001 From: guozhanxin <1171407708@qq.com> Date: Mon, 29 Nov 2021 02:38:37 +0000 Subject: [PATCH] =?UTF-8?q?=E3=80=90=E4=BF=AE=E5=A4=8D=E3=80=91=20sensor?= =?UTF-8?q?=20api=20=E6=8F=8F=E8=BF=B0=E9=97=AE=E9=A2=98?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../programming-manual/device/sensor/sensor.md | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/rt-thread-version/rt-thread-standard/programming-manual/device/sensor/sensor.md b/rt-thread-version/rt-thread-standard/programming-manual/device/sensor/sensor.md index be1b3cf..0206970 100644 --- a/rt-thread-version/rt-thread-standard/programming-manual/device/sensor/sensor.md +++ b/rt-thread-version/rt-thread-standard/programming-manual/device/sensor/sensor.md @@ -255,10 +255,10 @@ rt_size_t rt_device_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t | ------------------ | ---------------------------------------------- | | dev | 设备句柄 | | pos | 读取数据偏移量，此参数传感器未使用 | -| buffer | 缓冲区指针，读取的数据将会被保存在缓冲区中 | -| size | 读取数据的大小 | +| buffer | 缓冲区指针，读取的数据将会被保存在缓冲区中 | +| size | 读取数据的个数 | | **返回** | —— | -| 读到数据的实际大小 | 返回读取到数据的个数 | +| >0 | 返回读取到数据的个数 | | 0 | 需要读取当前线程的 errno 来判断错误状态 | 传感器使用中断接收模式并配合接收回调函数的使用示例如下所示： -- Gitee