一、实验功能:
1、 基于XR806实现WIFI连接路由器
2、 XR806设备创建TCP socket服务器,局域网内通过PC端TCP客服端连接XR806 TCP服务器进行指令控制小车运行(指令A:前进、B:后退、C:左转、D:右转、I:停止)。
3、 小车行进由GPIO控制电机转动,行进速度通过XR806硬件定时器实现GPIO的PWM脉宽调制来控制小车行进速度。
4、 创建双线程实现智能小车,一个线程负责小车运行,一个线程主要用于TCP socket服务器完成与TCP客服端的指令收发。
实物图:
二、开发环境安装配置
开发环境安装配置参考https://aijishu.com/a/1060000000291606博文,实现基于优麒麟ubuntukylin-20.04,使用的OpenHarmony代码版本是1.0.1_release。
鸿蒙系统固件烧录参考了下面这个贴子:
https://aijishu.com/a/1060000000287250 全志 XR806 OpenHarmony 鸿蒙系统固件烧录。
tcp socket通信参考帖子:
https://aijishu.com/a/1060000000286948 【XR806开发板试用】xr806使用tcp socket与手机通信
三、硬件连接电路
小车驱动板电路图
电源电路:输入7.2V-12V电源,通过LM2596S稳压IC输出5V电源
车轮驱动电路,采用L293芯片驱动电机。EN使能默认悬空为高电平,只需控制电机的GPIO口输出高低电平即可实现车轮的转动,如车轮电机T1,控制GPIO口为PD
XR806开发板接口图如下:
电机控制信号与XR806开发板IO口定义:
四、项目实现
参考了官方的点灯教程
创建工程
在device/xradio/xr806/ohosdemo中新建一个文件夹,并命令为smart_car。
在文件夹中新建文件
~/share/XR806/openharmony/device/xradio/xr806/ohosdemo/smart_car$ tree -L 2 . ├── BUILD.gn └── smart_car ├── BUILD.gn └── main.c ├── motor.h └── motor.c ├── tcp_net_socket.h └── tcp_net_socket.c
修改device/xradio/xr806/ohosdemo/smart_car/BUILD.gn
`import(“//device/xradio/xr806/liteos_m/config.gni”)
static_library(“app_smart_car”) {
configs = []
sources = [
“src/main.c”,
“src/tcp_net_socket.c”,
“src/motor.c”,
]
cflags = board_cflags
include_dirs = board_include_dirs
include_dirs += [
“//kernel/liteos_m/kernel/arch/include”,
“//base/iot_hardware/peripheral/interfaces/kits”,
“//utils/native/lite/include”,
“//foundation/communication/wifi_lite/interfaces/wifiservice”,
“//third_party/lwip/src/include”,
“//third_party/cJSON”,
]
}`
电机控制信号与XR806开发板IO口定义:
#define GPIO_ID_PA11 11
#define GPIO_ID_PA12 12
#define GPIO_ID_PA13 13
#define GPIO_ID_PA19 19
#define GPIO_ID_PA20 20
#define GPIO_ID_PA21 21
#define GPIO_ID_PA22 22
#define GPIO_ID_PA23 23
#define GPIO_ID_PB3 27
#define GPIO_ID_PB4 28
#define GPIO_ID_PB5 29
#define GPIO_ID_PB6 30
#define GPIO_ID_PB7 31
#define GPIO_ID_PB14 38
#define GPIO_ID_PB15 39#define FRONT_LEFT_F_PIN GPIO_ID_PA12
#define FRONT_LEFT_F_SET IoTGpioSetOutputVal(FRONT_LEFT_F_PIN,1);
#define FRONT_LEFT_F_RESET IoTGpioSetOutputVal(FRONT_LEFT_F_PIN,0);#define FRONT_LEFT_B_PIN GPIO_ID_PA13
#define FRONT_LEFT_B_SET IoTGpioSetOutputVal(FRONT_LEFT_B_PIN,1);
#define FRONT_LEFT_B_RESET IoTGpioSetOutputVal(FRONT_LEFT_B_PIN,0);#define FRONT_RIGHT_F_PIN GPIO_ID_PB7
#define FRONT_RIGHT_F_SET IoTGpioSetOutputVal(FRONT_RIGHT_F_PIN,1);
#define FRONT_RIGHT_F_RESET IoTGpioSetOutputVal(FRONT_RIGHT_F_PIN,0);#define FRONT_RIGHT_B_PIN GPIO_ID_PB5
#define FRONT_RIGHT_B_SET IoTGpioSetOutputVal(FRONT_RIGHT_B_PIN,1);
#define FRONT_RIGHT_B_RESET IoTGpioSetOutputVal(FRONT_RIGHT_B_PIN,0);#define BEHIND_LEFT_F_PIN GPIO_ID_PA19
#define BEHIND_LEFT_F_SET IoTGpioSetOutputVal(BEHIND_LEFT_F_PIN,1);
#define BEHIND_LEFT_F_RESET IoTGpioSetOutputVal(BEHIND_LEFT_F_PIN,0);#define BEHIND_LEFT_B_PIN GPIO_ID_PA20
#define BEHIND_LEFT_B_SET IoTGpioSetOutputVal(BEHIND_LEFT_B_PIN,1);
#define BEHIND_LEFT_B_RESET IoTGpioSetOutputVal(BEHIND_LEFT_B_PIN,0);#define BEHIND_RIGHT_F_PIN GPIO_ID_PB6
#define BEHIND_RIGHT_F_SET IoTGpioSetOutputVal(BEHIND_RIGHT_F_PIN,1);
#define BEHIND_RIGHT_F_RESET IoTGpioSetOutputVal(BEHIND_RIGHT_F_PIN,0);#define BEHIND_RIGHT_B_PIN GPIO_ID_PB4
#define BEHIND_RIGHT_B_SET IoTGpioSetOutputVal(BEHIND_RIGHT_B_PIN,1);
#define BEHIND_RIGHT_B_RESET IoTGpioSetOutputVal(BEHIND_RIGHT_B_PIN,0);
小车电机驱动配置
//左前
#define FRONT_LEFT_GO FRONT_LEFT_F_SET; FRONT_LEFT_B_RESET//前进
#define FRONT_LEFT_BACK FRONT_LEFT_F_RESET; FRONT_LEFT_B_SET//后退
#define FRONT_LEFT_STOP FRONT_LEFT_F_RESET; FRONT_LEFT_B_RESET//停止//右前
#define FRONT_RIGHT_GO FRONT_RIGHT_F_SET; FRONT_RIGHT_B_RESET
#define FRONT_RIGHT_BACK FRONT_RIGHT_F_RESET;FRONT_RIGHT_B_SET
#define FRONT_RIGHT_STOP FRONT_RIGHT_F_RESET;FRONT_RIGHT_B_RESET//左后
#define BEHIND_LEFT_GO BEHIND_LEFT_F_SET;BEHIND_LEFT_B_RESET
#define BEHIND_LEFT_BACK BEHIND_LEFT_F_RESET;BEHIND_LEFT_B_SET
#define BEHIND_LEFT_STOP BEHIND_LEFT_F_RESET;BEHIND_LEFT_B_RESET//右后
#define BEHIND_RIGHT_GO BEHIND_RIGHT_F_SET;BEHIND_RIGHT_B_RESET
#define BEHIND_RIGHT_BACK BEHIND_RIGHT_F_RESET;BEHIND_RIGHT_B_SET
#define BEHIND_RIGHT_STOP BEHIND_RIGHT_F_RESET;BEHIND_RIGHT_B_RESET//全局变量定义
#define SPEED_DUTY 40//默认占空比 按1ms最小分辨率 周期50ms计算
unsigned int speed_count=0;//占空比计数器 50次一周期
char front_left_speed_duty=SPEED_DUTY;
char front_right_speed_duty=SPEED_DUTY;
char behind_left_speed_duty=SPEED_DUTY;
char behind_right_speed_duty=SPEED_DUTY;
定时器实现小车PWM控制
`void timer_callback(void *arg)
{
/sec_count++;
printf(" timer irq: %d\n\r", sec_count);
IoTGpioSetOutputVal(11, sec_count%2);/
tick_1ms++;
if(tick_1ms >= 10)
{tick_1ms = 0;speed_count++;tick_5ms++;if(speed_count >= 50){speed_count = 0;}CarMove();
}
}
int timer_init(void)
{
HAL_Status status = HAL_ERROR;
TIMER_InitParam param;
param.arg = NULL;
param.callback = timer_callback;
param.cfg = HAL_TIMER_MakeInitCfg(TIMER_MODE_REPEAT, /*timer mode*/TIMER_CLK_SRC_HFCLK, /*HFCLOCK*/TIMER_CLK_PRESCALER_4); /*CLK_PRESCALER*/
param.isEnableIRQ = 1;
param.period = COUNT_TIME * (HFCLOCK / CLK_PRESCALER);status = HAL_TIMER_Init(TIMERID, ¶m);
if (status != HAL_OK)printf("timer int error %d\n", status);return status;
}小车前进函数,根据占空比驱动电机转动
void CarMove(void)
{
//左前轮
if(front_left_speed_duty > 0)//向前
{
if(speed_count < front_left_speed_duty)
{
FRONT_LEFT_GO;
}else
{
FRONT_LEFT_STOP;
}
}
else if(front_left_speed_duty < 0)//向后
{
if(speed_count < (-1)*front_left_speed_duty)
{
FRONT_LEFT_BACK;
}else
{
FRONT_LEFT_STOP;
}
}
else //停止
{
FRONT_LEFT_STOP;
}
//右前轮
if(front_right_speed_duty > 0)//向前
{if(speed_count < front_right_speed_duty){FRONT_RIGHT_GO;}else //停止{FRONT_RIGHT_STOP;}
}
else if(front_right_speed_duty < 0)//向后
{if(speed_count < (-1)*front_right_speed_duty){FRONT_RIGHT_BACK;}else //停止{FRONT_RIGHT_STOP;}
}
else //停止
{FRONT_RIGHT_STOP;
}//左后轮
if(behind_left_speed_duty > 0)//向前
{if(speed_count < behind_left_speed_duty){BEHIND_LEFT_GO;} else //停止{BEHIND_LEFT_STOP;}
}
else if(behind_left_speed_duty < 0)//向后
{if(speed_count < (-1)*behind_left_speed_duty){BEHIND_LEFT_BACK;} else //停止{BEHIND_LEFT_STOP;}
}
else //停止
{BEHIND_LEFT_STOP;
}//右后轮
if(behind_right_speed_duty > 0)//向前
{if(speed_count < behind_right_speed_duty){BEHIND_RIGHT_GO;} else //停止{BEHIND_RIGHT_STOP;}
}
else if(behind_right_speed_duty < 0)//向后
{if(speed_count < (-1)*behind_right_speed_duty){BEHIND_RIGHT_BACK;} else //停止{BEHIND_RIGHT_STOP;}
}
else //停止
{BEHIND_RIGHT_STOP;
}
}
//向前
void CarGo(void)
{
front_left_speed_duty=25;//SPEED_DUTY 50
front_right_speed_duty=25;
behind_left_speed_duty=25;
behind_right_speed_duty=25;
}
//后退
void CarBack(void)
{
front_left_speed_duty=-50;//SPEED_DUTY
front_right_speed_duty=-50;
behind_left_speed_duty=-50;
behind_right_speed_duty=-50;
}
//向左
void CarLeft(void)
{
front_left_speed_duty=-20;
front_right_speed_duty=SPEED_DUTY;
behind_left_speed_duty=-20;
behind_right_speed_duty=SPEED_DUTY+10;//增加后轮驱动力
}
//向右
void CarRight(void)
{
front_left_speed_duty=SPEED_DUTY;
front_right_speed_duty=-20;
behind_left_speed_duty=SPEED_DUTY+10;//增加后轮驱动力
behind_right_speed_duty=-20;
}
//停止
void CarStop(void)
{
front_left_speed_duty=0;
front_right_speed_duty=0;
behind_left_speed_duty=0;
behind_right_speed_duty=0;
}`
项目编译
下载固件
device\xradio\xr806\xr_skylark\out\xr_system.img
PC端TCP客服端边连接小车下发指令。
小车指令接收串口打印
五、碰到问题
编译报数据溢出错误:
[OHOS ERROR] chmod 777 ../../../../../tools/mkimage && ../../../../../tools/mkimage -c .image.cfg -o xr_system.img
[OHOS ERROR] err: bin 1 and bin 2 were overlaped!
[OHOS ERROR] Overlapped size: 1024 Byte(1kB)
[OHOS ERROR] bin 1 name:app.bin begin: 0x00008000 end: 0x00018000
[OHOS ERROR] bin 2 name:app_xip.bin begin: 0x00017C00
[OHOS ERROR]
[OHOS ERROR] We've rearranged bin files and generated new cfg file 'image_auto_cal.cfg', the new one is recommended.
[OHOS ERROR] Generate image file failed
[OHOS ERROR] cfg string:
[OHOS ERROR] /*
[OHOS ERROR] *
[OHOS ERROR] * Automatically generated file; DO NOT EDIT.
[OHOS ERROR] * XR806 SDK Configuration
[OHOS ERROR] *
[OHOS ERROR] */
[OHOS ERROR] {
[OHOS ERROR] "magic" : "AWIH",
[OHOS ERROR] "version" : "0.5",
[OHOS ERROR] "image" : {"max_size": "1532K"},
[OHOS ERROR] "section" :[
[OHOS ERROR] {"id": "0xa5ff5a00", "bin" :"boot_40M.bin", "cert": "null", "flash_offs": "0K", "sram_offs": "0x00230000", "ep": "0x00230101", "attr":"0x1"},
[OHOS ERROR] {"id": "0xa5fe5a01", "bin" :"app.bin", "cert": "null", "flash_offs": "32K", "sram_offs": "0x00201000", "ep": "0x00201101", "attr":"0x1"},
[OHOS ERROR] {"id": "0xa5fd5a02", "bin" :"app_xip.bin", "cert": "null", "flash_offs": "95K", "sram_offs": "0xffffffff", "ep": "0xffffffff", "attr":"0x2"},
[OHOS ERROR] {"id": "0xa5fa5a05", "bin" :"wlan_bl.bin", "cert": "null", "flash_offs": "1166K", "sram_offs": "0xffffffff", "ep": "0xffffffff", "attr":"0x1"},
[OHOS ERROR] {"id": "0xa5f95a06", "bin" :"wlan_fw.bin", "cert": "null", "flash_offs": "1169K", "sram_offs": "0xffffffff", "ep": "0xffffffff", "attr":"0x1"},
[OHOS ERROR] {"id": "0xa5f85a07", "bin" :"sys_sdd_40M.bin", "cert": "null", "flash_offs": "1194K", "sram_offs": "0xffffffff", "ep": "0xffffffff", "attr":"0x1"},
[OHOS ERROR] {}
[OHOS ERROR] ]
[OHOS ERROR] }
查找出错点:
openharmony$ grep “1532K” device/xradio/xr806/xr_skylark/project -rn
device/xradio/xr806/xr_skylark/project/example/audio_play/image/xr806/image.cfg:6: "image" : {"max_size": "1532K", "xz_max_size": "1200K"},
device/xradio/xr806/xr_skylark/project/example/audio_play/image/xr806/image.cfg:8: "image" : {"max_size": "1532K"},
device/xradio/xr806/xr_skylark/project/demo/audio_demo/image/xr806/image.cfg:4: "image" : {"max_size": "1532K"},
device/xradio/xr806/xr_skylark/project/demo/audio_demo/image/xr806/image_auto_cal.cfg:10: "image" : {"max_size": "1532K"},
device/xradio/xr806/xr_skylark/project/demo/audio_demo/image/xr806/.image.cfg:10: "image" : {"max_size": "1532K"},
XR806/openharmony/device/xradio/xr806/xr_skylark/project/demo/audio_demo/image/xr806$ ls -l
总用量 2404
-rwxrwxr-x 1 boarmy boarmy 64456 1月 17 20:01 app.bin
-rwxrwxr-x 1 boarmy boarmy 1095680 1月 17 20:01 app_xip.bin
-rwxrwxr-x 1 boarmy boarmy 25024 1月 17 20:01 boot_40M.bin
-rw-rw-r-- 1 boarmy boarmy 1067 1月 17 20:01 image_auto_cal.cfg
-rwxrwxr-x 1 boarmy boarmy 982 1月 9 12:51 image.cfg
-rwxrwxr-x 1 boarmy boarmy 792 1月 17 20:01 sys_sdd_40M.bin
-rwxrwxr-x 1 boarmy boarmy 2320 1月 17 20:01 wlan_bl.bin
-rwxrwxr-x 1 boarmy boarmy 25492 1月 17 20:01 wlan_fw.bin
-rw-rw-r-- 1 boarmy boarmy 1223512 1月 17 19:51 xr_system.img
可找到image.cf
{"magic" : "AWIH","version" : "0.5","image" : {"max_size": "1532K"},"section" :[{"id": "0xa5ff5a00", "bin" :"boot_40M.bin", "cert": "null", "flash_offs": "0K", "sram_offs": "0x00230000", "ep": "0x00230101", "attr":"0x1"},{"id": "0xa5fe5a01", "bin" :"app.bin", "cert": "null", "flash_offs": "32K", "sram_offs": "0x00201000", "ep": "0x00201101", "attr":"0x1"},{"id": "0xa5fd5a02", "bin" :"app_xip.bin", "cert": "null", "flash_offs": "95K", "sram_offs": "0xffffffff", "ep": "0xffffffff", "attr":"0x2"},{"id": "0xa5fa5a05", "bin" :"wlan_bl.bin", "cert": "null", "flash_offs": "1166K", "sram_offs": "0xffffffff", "ep": "0xffffffff", "attr":"0x1"},{"id": "0xa5f95a06", "bin" :"wlan_fw.bin", "cert": "null", "flash_offs": "1169K", "sram_offs": "0xffffffff", "ep": "0xffffffff", "attr":"0x1"},{"id": "0xa5f85a07", "bin" :"sys_sdd_40M.bin", "cert": "null", "flash_offs": "1194K", "sram_offs": "0xffffffff", "ep": "0xffffffff", "attr":"0x1"},{}]
}
将image.cfg修改为:
{"magic" : "AWIH","version" : "0.5","image" : {"max_size": "1532K"},"section" :[{"id": "0xa5ff5a00", "bin" :"boot_40M.bin", "cert": "null", "flash_offs": "0K", "sram_offs": "0x00230000", "ep": "0x00230101", "attr":"0x1"},{"id": "0xa5fe5a01", "bin" :"app.bin", "cert": "null", "flash_offs": "32K", "sram_offs": "0x00201000", "ep": "0x00201101", "attr":"0x1"},{"id": "0xa5fd5a02", "bin" :"app_xip.bin", "cert": "null", "flash_offs": "", "sram_offs": "0xffffffff", "ep": "0xffffffff", "attr":"0x2"},{"id": "0xa5fa5a05", "bin" :"wlan_bl.bin", "cert": "null", "flash_offs": "", "sram_offs": "0xffffffff", "ep": "0xffffffff", "attr":"0x1"},{"id": "0xa5f95a06", "bin" :"wlan_fw.bin", "cert": "null", "flash_offs": "", "sram_offs": "0xffffffff", "ep": "0xffffffff", "attr":"0x1"},{"id": "0xa5f85a07", "bin" :"sys_sdd_40M.bin", "cert": "null", "flash_offs": "", "sram_offs": "0xffffffff", "ep": "0xffffffff", "attr":"0x1"},{}]
}
flash_offs - 该段bin文件存放在 FLASH 中的位置偏移,若不填写,则软件自动放在上一个文件结束的位置,以1024 byte对齐。问题解决。