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UART(Universal Asynchronous Receiver/Transmitter,通用异步收发器),这是用于全双工串行通信的最常见协议。该设备将数据从一个设备发送到另一个设备。
打开Ubuntu终端输入命令安装:
sudo apt-get install nodejs
sudo apt-get install npm
node --version //查看nodejs版本
npm --version //查看npm版本
sudo 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
python3 -m pip install scons
scons -v //查看版本
如图:
python3 -m pip install --user ohos-build
vim ~/.bashrc //设置环境变量
export PATH=~/.local/bin:$PATH //将以下命令拷贝到.bashrc文件的最后一行,保存并退出
source ~/.bashrc //更新环境变量
执行"hb -h",有打印以下信息即表示安装成功.
下载gcc_riscv32镜像
将压缩包解压到根目录
tar -xvf gcc_riscv32-linux-7.3.0.tar.gz -C ~ //文件名需要与下载的文件相匹配
设置环境变量。
vim ~/.bashrc //设置环境变量
export PATH=~/gcc_riscv32/bin:$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
文件在Open Harmony源码目录下device/hisilicon/hispark_pegasus/sdk_liteos/build/config/usr_config.mk
CONFIG_I2C_SUPPORT=y
CONFIG_PWM_SUPPORT=y
文件在Open Harmony源码目录下device/hisilicon/hispark_pegasus/hi3861_adapter/hals/communication/wifi_lite/wifiservice/source/wifi_hotspot.c
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);
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:
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
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\n", ret); return; } }
static void *uart_demo_task(void) { static uint16_t countSendTimes = 0; static uint8_t countReceiveTimes = 0; uartController.isReadBusy = false; printf("[Initialize uart successfully\n"); 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 \r\n", __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----\n"); 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.\n", 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,要交叉连接;tx—RX、TX—rx
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