張兵

就讀于貴州黔南科技學(xué)院

首期OpenHarmony開源開發(fā)者成長計(jì)劃“智能語音垃圾桶”項(xiàng)目開發(fā)者

一、搭建編譯環(huán)境

1、下載虛擬機(jī)VMware和Ubuntu20.0.14

下載 VMware Workstation Pro | CN

https://www.vmware.com/cn/products/workstation-pro/workstation-pro-evaluation.html

Ubuntu系統(tǒng)下載 | Ubuntu

https://cn.ubuntu.com/download

2、 安裝vm完成后打開vm，點(diǎn)擊創(chuàng)建新的虛擬機(jī)

3、選擇典型點(diǎn)擊下一步，選擇下載的Ubuntu，點(diǎn)擊下一步，創(chuàng)建完成后虛擬機(jī)自動(dòng)安裝Ubuntu

4、安裝完成后獲取OpenHarmony源碼可參考

https://docs.openharmony.cn/pages/v3.1/zh-cn/device-dev/get-code/sourcecode-acquire.md/

5、安裝編譯工具

（1）安裝Node.js 打開Ubuntu終端輸入命令安裝：

sudo apt-get install nodejssudo apt-get install npmnode --version   //查看nodejs版本npm--version//查看npm版本

（2）安裝Python編譯環(huán)境

sudo apt-get install python3.8sudo apt-get install python3-pipsudo pip3 install setuptoolssudo pip3 install kconfiglib sudo pip3 install pycryptodomesudo pip3 install six --upgrade --ignore-installed sixsudopip3installecdsa

（3） 安裝SCons

python3 -m pip install sconsscons-v//查看版本

如圖：

（4）安裝hb工具代碼測試

python3 -m pip install --user ohos-buildvim ~/.bashrc                      //設(shè)置環(huán)境變量export PATH=~/.local/bin:$PATH        //將以下命令拷貝到.bashrc文件的最后一行，保存并退出source~/.bashrc//更新環(huán)境變量

執(zhí)行"hb -h"，有打印以下信息即表示安裝成功。

（5） 安裝gcc_riscv32

下載gcc_riscv32鏡像

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

設(shè)置環(huán)境變量

將壓縮包解壓到根目錄

tar -xvf gcc_riscv32-linux-7.3.0.tar.gz -C ~    //文件名需要與下載的文件相匹配設(shè)置環(huán)境變量。vim ~/.bashrc                      //設(shè)置環(huán)境變量export PATH=~/gcc_riscv32/bin:$PATH    //將以下命令拷貝到.bashrc文件的最后一行，保存并退出source ~/.bashrc            //更新環(huán)境變量riscv32-unknown-elf-gcc-v//顯示版本號(hào)，則安裝成功

6、修改usr_config.mk文件 文件在OpenHarmony源碼目錄下 device/hisilicon/hispark_pegasus/sdk_liteos/build/config/usr_config.mk

CONFIG_I2C_SUPPORT=yCONFIG_PWM_SUPPORT=y

7、修改wifiservice文件夾 文件在OpenHarmony源碼目錄下 device/hisilicon/hispark_pegasus/hi3861_adapter/hals/communication/wifi_lite/wifiservice/source/wifi_hotspot.c

EnableHotspot函數(shù)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.cDispatchConnectEvent函數(shù)下 屏蔽StaSetWifiNetConfig相關(guān)代碼行      //StaSetWifiNetConfig(HI_WIFI_EVT_CONNECTED);//StaSetWifiNetConfig(HI_WIFI_EVT_DISCONNECTED);

二、創(chuàng)建項(xiàng)目文件夾

1、在OpenHarmony1.01版本創(chuàng)建一個(gè)項(xiàng)目demo

在源碼目錄下的vendor/team_x創(chuàng)建smart_demo

在scr里面添加我們寫的代碼：

2、初始化uart串口

首先我們需要?jiǎng)?chuàng)建一個(gè)初始化uart串口的程序

將GPIO0初始化為tx端，將GPIO1初始化為rx端

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;    }}

3、創(chuàng)建線程任務(wù)

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);

4、接收串口數(shù)據(jù)

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;}

當(dāng)hi3861開發(fā)板接收到其他開發(fā)板傳輸?shù)臄?shù)據(jù)后，可以通過串口打印出來，對(duì)此可以寫一個(gè)解析命令，對(duì)發(fā)送的字符串，執(zhí)行相應(yīng)的命令

注：在接線時(shí)，要將tx與另一個(gè)開發(fā)板的rx連接，因?yàn)樵赨ART串口協(xié)議中，通過TX（發(fā)送引腳）和RX（接收引腳）進(jìn)行數(shù)據(jù)傳輸與接收，需要將TX發(fā)送引腳與另一開發(fā)板的RX接收引腳相連接，故需要交叉連接以保證兩塊開發(fā)板的正常通信。