@@ -17,9 +17,9 @@ Download and install DevEco Studio. For details, see the [HUAWEI DevEco Studio
## How to Develop<a name="section19901741111312"></a>
The Clock app displays the current time through a clock face and numbers.
The clock app displays the current time through a clock face and numbers.
As shown in [Figure 1 Clock display effect](#fig7763172132019), the UI consists of two parts:
As shown in [Figure 1](#fig7763172132019), the UI consists of two parts:
- Clock face area: displays a dynamic analog clock whose hands rotate accurately.
- Digital time area: displays the current time in numerals.
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@@ -251,7 +251,7 @@ After finishing writing the app code, you need to sign and package the app befor
## Running on the Real Device<a name="section092721731511"></a>
Before you install the app and run it on the development board, install the DevEco Device Tool by following operations provided in [HUAWEI DevEco Device Tool User Guide](https://device.harmonyos.com/en/docs/ide/user-guides/service_introduction-0000001050166905). Burn OpenHarmony into the development board, and run it on the board. For details about how to build, burn, and run an image, see . After the image is running normally and the system is started properly, perform the following steps to install or uninstall the app:
Before you install the app and run it on the development board, install the DevEco Device Tool by following operations provided in [HUAWEI DevEco Device Tool User Guide](https://device.harmonyos.com/en/docs/ide/user-guides/service_introduction-0000001050166905). Burn OpenHarmony into the development board and run it. For details about how to build, burn, and run an image, see [Standard System Overview](../quick-start/quickstart-standard-overview.md). After the image is running normally and the system is started properly, perform the following steps to install or uninstall the app:
1. Obtain the HDC client from the following path:
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@@ -289,15 +289,15 @@ Before you install the app and run it on the development board, install the DevE
**\[Empty\]** is displayed in the output after the **hdc\_std list targets** command is run.
-**Possible Causes and Solutions**
1. The device fails to be identified.
- The device fails to be identified.
Check whether **HDC Device** exists in the universal serial bus device of the device manager. If **HDC Device** does not exist, the device cannot be connected. In this case, remove and then insert the device or burn the latest image for the device.
2. hdc\_std works improperly.
- hdc\_std works improperly.
Run the **hdc kill** or **hdc start -r** command to kill or restart the HDC service, and then run the **hdc list targets** command to check whether device information is obtained.
3. hdc\_std does not match the device.
- hdc\_std does not match the device.
If the latest image is burnt for the device, hdc\_std must also be of the latest version. As hdc\_std is updated continuously, obtain hdc\_std of the latest version from the **developtools\_hdc\_standard** repository in the **prebuilt** directory.
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@@ -312,5 +312,3 @@ Before you install the app and run it on the development board, install the DevE
-**Possible Causes and Solutions**
**hdc\_std.exe** requires no installation and can be directly used on a disk. It can also be added to environment variables. Open the **cmd** window and run the **hdc\_std** command to use **hdc\_std.exe**.
@@ -10,16 +10,17 @@ Based on the Hi3861 platform, the OpenHarmony WLAN module provides abundant peri
LED control examples are stored in the file **applications/sample/wifi-iot/app/iothardware/led\_example.c**.
2. Understand the cable connections by referring to the schematic diagram. You can learn that LED of hispark pegasus is connected to pin 9 of the chip.
2. Understand the cable connections by referring to the schematic diagram of the development board. You can learn that LED of hispark pegasus is connected to pin 9 of the chip.
