一般电调在刚上电时需要使用航模遥控器设置油门行程，或者是设置电调参数时，也需要使用航模遥控器来控制选项

当然也可以直接使用mega板直接设置电调的高低行程，但我手头现在有一个摇杆所以就试着使用JOYSTICK来模拟航模

遥控器，具体流程见如下图

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使用Win32 API初始化JOYSTICK如下 UINT pos_x = 0, pos_y = 0,pos_b = 0; JOYINFO joyinfo; //JOYCAPS caps; UINT wNumDevs, wDeviceID; BOOL bDev1Attached, bDev2Attached; if ((wNumDevs = joyGetNumDevs()) == 0) { printf("no joystick plug in "); return 1; } /* memset(&caps, 0, sizeof(caps)); for (int i = 0; i < wNumDevs; i++) { memset(&caps, 0, sizeof(caps)); if (joyGetDevCaps(i, &caps, sizeof(caps) == JOYERR_NOERROR)) { wprintf(L"joystick %d :product %s reg:%s ", i, caps.szPname,caps.szRegKey); } } */ bDev1Attached = joyGetPos(JOYSTICKID1, &joyinfo) == JOYERR_NOERROR; bDev2Attached = wNumDevs > 1 && joyGetPos(JOYSTICKID2, &joyinfo) == JOYERR_NOERROR; if (bDev1Attached) { wDeviceID = JOYSTICKID1; printf("joystick 1 attached "); } else if (bDev2Attached) { wDeviceID = JOYSTICKID2; printf("joystick 2 attached "); } else { printf("no joystick attck "); return 1; } 设置JOYSTICK后读取其数值并将其map (PS: JOYSTICK读出的数据在（0-65535） 之间中间值为32767
电调PWM在1000-2000之间） while (true) { if (joyGetPos(JOYSTICKID1, &joyinfo) == JOYERR_NOERROR) { if (pos_x != joyinfo.wXpos || pos_y != joyinfo.wYpos || pos_b != joyinfo.wButtons) { pos_x = joyinfo.wXpos; pos_y = joyinfo.wYpos; pos_b = joyinfo.wButtons; if (pos_b & 0x1) { printf("exit "); break; } if (map_servo(pos_y) != servo_y) { servo_y = map_servo(pos_y); sprintf_s(buf, "%d;", map_servo(pos_y)); hardware.write(buf, sizeof(buf)); } } } } 接下来就可以通过mega串口读取到当前PWM值然后输出到电调即可 /* this code is for arduino */ #include char buf[32]; byte offset = 0; int num; Servo ser; inline int parse_int_dec(const char* p) { bool isNeg = false; int ret = 0; if(*p == '-') { isNeg = true; p++; } while(*p) { if(*p < '0' || *p > '9') { ret = 0; break; } ret *= 10; ret += *p - '0'; p++; } if (isNeg) ret *= -1; return ret; } void setup() { // put your setup code here, to run once: Serial.begin(115200); ser.attach(9); } void loop() { // put your main code here, to run repeatedly: char c; if(Serial.available()) { c = Serial.read(); if(c >= '0'&& c <= '9') { buf[offset++] = c; }else if(c == ';') { buf[offset++] = 0; offset = 0; num = parse_int_dec(buf); if(num >= 1000 & num <= 2000){ ser.writeMicroseconds(num); } } } } github项目地址