张兵
就读于贵州黔南科技学院
首期OpenHarmony开源开发者成长计划“智能语音垃圾桶”项目开发者
一、搭建编译环境
1、下载虚拟机VMware和Ubuntu20.0.14下载 VMware Workstation Pro | CN
https://www.vmware.com/cn/products/workstation-pro/workstation-pro-evaluation.html
Ubuntu系统下载 | Ubuntu
https://cn.ubuntu.com/download
2、 安装vm完成后打开vm,点击创建新的虚拟机
3、选择典型点击下一步,选择下载的Ubuntu,点击下一步,创建完成后虚拟机自动安装Ubuntu
4、安装完成后获取OpenHarmony源码可参考
https://docs.openharmony.cn/pages/v3.1/zh-cn/device-dev/get-code/sourcecode-acquire.md/
5、安装编译工具
(1)安装Node.js 打开Ubuntu终端输入命令安装:(2)安装Python编译环境sudo apt-get install nodejs
sudo apt-get install npm
node --version //查看nodejs版本
npm --version //查看npm版本
(3) 安装SConssudo apt-get install python3.8
sudo apt-get install python3-pip
sudo pip3 install setuptools
sudo pip3 install kconfiglib
sudo pip3 install pycryptodome
sudo pip3 install six --upgrade --ignore-installed six
sudo pip3 install ecdsa
如图:python3 -m pip install scons
scons -v //查看版本
(4)安装hb工具代码测试
执行"hb -h",有打印以下信息即表示安装成功。python3 -m pip install --user ohos-build
vim ~/.bashrc //设置环境变量
export PATH=~/.local/bin:$PATH //将以下命令拷贝到.bashrc文件的最后一行,保存并退出
source ~/.bashrc //更新环境变量
(5) 安装gcc_riscv32
下载gcc_riscv32镜像
https://gitee.com/link?target=https%3A%2F%2Frepo.huaweicloud.com%2Fharmonyos%2Fcompiler%2Fgcc_riscv32%2F7.3.0%2Flinux%2Fgcc_riscv32-linux-7.3.0.tar.gz
设置环境变量
将压缩包解压到根目录
6、修改usr_config.mk文件 文件在OpenHarmony源码目录下 device/hisilicon/hispark_pegasus/sdk_liteos/build/config/usr_config.mktar -xvf gcc_riscv32-linux-7.3.0.tar.gz -C ~ //文件名需要与下载的文件相匹配
设置环境变量。
vim ~/.bashrc //设置环境变量
export PATH=~/gcc_riscv32/bin:$PATH //将以下命令拷贝到.bashrc文件的最后一行,保存并退出
source ~/.bashrc //更新环境变量
riscv32-unknown-elf-gcc -v //显示版本号,则安装成功
7、修改wifiservice文件夹 文件在OpenHarmony源码目录下 device/hisilicon/hispark_pegasus/hi3861_adapter/hals/communication/wifi_lite/wifiservice/source/wifi_hotspot.cCONFIG_I2C_SUPPORT=y
CONFIG_PWM_SUPPORT=y
EnableHotspot函数中屏蔽如下字段
//if (SetHotspotIpConfig() != WIFI_SUCCESS) {
// return ERROR_WIFI_UNKNOWN;
//}
地址:device/hisilicon/hispark_pegasus/hi3861_adapter/hals/communication/wifi_lite/wifiservice/source/wifi_device.c
DispatchConnectEvent函数下 屏蔽StaSetWifiNetConfig相关代码行
//StaSetWifiNetConfig(HI_WIFI_EVT_CONNECTED);
//StaSetWifiNetConfig(HI_WIFI_EVT_DISCONNECTED);
二、创建项目文件夹
1、在OpenHarmony1.01版本创建一个项目demo在源码目录下的vendor/team_x创建smart_demo
在scr里面添加我们写的代码:
2、初始化uart串口
首先我们需要创建一个初始化uart串口的程序
将GPIO0初始化为tx端,将GPIO1初始化为rx端
3、创建线程任务void UartInit(void){
RaiseLog(LOG_LEVEL_INFO,"[2022012x01] entry into UartInit");
IoTGpioInit(HAL_WIFI_IOT_IO_NAME_GPIO_0);
HalIoSetFunc(HAL_WIFI_IOT_IO_NAME_GPIO_0, WIFI_IOT_IO_FUNC_GPIO_0_UART1_TXD);
IoTGpioInit(HAL_WIFI_IOT_IO_NAME_GPIO_1);
HalIoSetFunc(HAL_WIFI_IOT_IO_NAME_GPIO_1, WIFI_IOT_IO_FUNC_GPIO_1_UART1_RXD);
hi_uart_attribute uart_attr = {
.baud_rate = UART_BAUD_RATE, /* baud_rate: 9600 */
.data_bits = UART_DATA_BITS, /* data_bits: 8bits */
.stop_bits = UART_STOP_BITS,
.parity = 0,
}
RaiseLog(LOG_LEVEL_INFO,"[2022012x01] uart_init success");
/* Initialize uart driver */
hi_u32 ret = hi_uart_init(HI_UART_IDX_1, &uart_attr, HI_NULL);
if (ret != HI_ERR_SUCCESS)
{
printf("[Dustbin_tes3]Failed to init uart! Err code = %d ", ret);
return;
}
}
4、接收串口数据static void *uart_demo_task(void)
{
static uint16_t countSendTimes = 0;
static uint8_t countReceiveTimes = 0;
uartController.isReadBusy = false;
printf("[Initialize uart successfully ");
UartInit();
while (1)
{
osDelay(50);
UartReceiveMessage();//Collecting Serial Port Data
hi_sleep(SMART_BIN_SLEEP_2500MS);
}
return 0;
}
static void IotMainEntry(void)
{
osThreadAttr_t attr;
RaiseLog(LOG_LEVEL_INFO, "DATA:%s Time:%s ", __FUNCTION__, __DATE__, __TIME__);
// Create the IoT Main task
attr.attr_bits = 0U;
attr.cb_mem = NULL;
attr.cb_size = 0U;
attr.stack_mem = NULL
attr.stack_size = CONFIG_TASK_MAIN_STACKSIZE;
attr.priority = CONFIG_TASK_MAIN_PRIOR;
attr.name = "IoTMain";
(void) osThreadNew((osThreadFunc_t)uart_demo_task, NULL, (const osThreadAttr_t *)&attr);
return;
}
APP_FEATURE_INIT(IotMainEntry);
static void UartReceiveMessage(void)
{
char *recData;
printf("----Listening---- ");
RaiseLog(LOG_LEVEL_INFO,"Start Listening serial port");
if (UartIsBufEmpty())
{
return;
}
if (uartController.isReadBusy)
{
return;
}
uartController.isReadBusy = true;
g_ReceivedDatalen = hi_uart_read(UART_NUM, g_uart_buff, UART_BUFF_SIZE);
if (g_ReceivedDatalen > 0)
{
printf("handleUartReceiveMessage rcvData len:%d,msg:%s. ", g_ReceivedDatalen, g_uart_buff);
setVoiceCommand();//Setting voice Commands
memset(g_uart_buff, 0, sizeof(g_uart_buff));
g_ReceivedDatalen = 0;
}
uartController.isReadBusy = false;
}
当hi3861开发板接收到其他开发板传输的数据后,可以通过串口打印出来,对此可以写一个解析命令,对发送的字符串,执行相应的命令
注:在接线时,要将tx与另一个开发板的rx连接,因为在UART串口协议中,通过TX(发送引脚)和RX(接收引脚)进行数据传输与接收,需要将TX发送引脚与另一开发板的RX接收引脚相连接,故需要交叉连接以保证两块开发板的正常通信。
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