串口集成
Arduino串口读取目标检测结果
适用产品
拥有串口的摄像头：
- SingTown AI Vision Module SC（yes）
目的
使用 Arduino，通过串口获取 SingTown AI Vision Module 的目标检测识别结果。
前提条件
模型已上传到摄像头
连接电路
- SingTown AI Vision Module RX 不连接
- SingTown AI Vision Module TX 连接 Arduino D10
- SingTown AI Vision Module GND 连接 Arduino GND
- SingTown AI Vision Module VIN 连接 Arduino 5V (可选)
运行Arduino的代码
代码下载：
- GitHub: https://github.com/SingTown/singtown-ai-cam-arduino-example/blob/main/read_singtownaicam_objs.ino
- 直接下载: 点此下载
代码介绍：
#define OBJECT_MAX 8 // Max Found 8 Objects
#define OBJECT_SIZE 10 // Every Object is 10 bytes
struct DetectObj {
int score; // max 255
int idx;
int x1; // box left coordinate, max 640
int y1; // box top coordinate, max 480
int x2; // box right coordinate, max 640
int y2; // box bottom coordinate, max 480
};
struct DetectObj objs[OBJECT_MAX];全局变量 objs ，用于存放读取的结果。
int check_crc(unsigned char* payload) {
unsigned char num = payload[0];
unsigned char crc = 0;
int i = 0, j = 0;
for (i = 0; i < num * OBJECT_SIZE + 2; i++) {
crc ^= payload[i];
for (j = 0; j < 8; j++) {
if (crc & 1)
crc ^= 0x91;
crc >>= 1;
}
}
return crc;
}check_crc 为校验函数，用于校验数据帧是否正确。
int read_singtownaicam_objs() {
int i;
unsigned char num;
unsigned char payload[OBJECT_MAX * OBJECT_SIZE + 2];
unsigned char* obj_ptr;
int byte;
while (1) {
if (readByte() != 0xeb) continue;
if (readByte() != 0x90) continue;
num = readByte();
if (num < 0 || num > OBJECT_MAX)
continue;
payload[0] = num;
for (i = 1; i < num * OBJECT_SIZE + 2; i++) {
byte = readByte();
if (byte == -1) break;
payload[i] = byte;
}
if (check_crc(payload) != 0) continue;
for (i = 0; i < num; i++) {
obj_ptr = payload + i * OBJECT_SIZE + 1;
objs[i].score = obj_ptr[0];
objs[i].idx = obj_ptr[1];
objs[i].x1 = obj_ptr[2] | (obj_ptr[3] << 8);
objs[i].y1 = obj_ptr[4] | (obj_ptr[5] << 8);
objs[i].x2 = obj_ptr[6] | (obj_ptr[7] << 8);
objs[i].y2 = obj_ptr[8] | (obj_ptr[9] << 8);
}
return num;
}
}read_singtownaicam_objs 是读取数据函数，结果存放在 objs 全局变量中。