سلام من اسکچ gy-8oرا اجرا کردم این خطاها را میدهد چرا؟چکار کنم؟
Arduino: 1.6.9 (Windows 8.1), Board: "Arduino/Genuino Uno"

C:\Users\Parsian\Downloads\Compressed\GY80 CODE\GY80 CODE\AHR9DOF\AHRS9DOF\AHRS9DOF.ino: In function 'void ReadSensors()':

AHRS9DOF:199: error: 'Read_Pressure' was not declared in this scope

Read_Pressure();

^

AHRS9DOF:200: error: 'Read_Gyro' was not declared in this scope

Read_Gyro(); // Read gyroscope

^

AHRS9DOF:201: error: 'Read_Accel' was not declared in this scope

Read_Accel(); // Read accelerometer

^

AHRS9DOF:202: error: 'Read_Magn' was not declared in this scope

Read_Magn(); // Read magnetometer

^

C:\Users\Parsian\Downloads\Compressed\GY80 CODE\GY80 CODE\AHR9DOF\AHRS9DOF\AHRS9DOF.ino: In function 'void reset_sensor_fusion()':

AHRS9DOF:225: error: 'Vector_Cross_Product' was not declared in this scope

Vector_Cross_Product(temp1, Accel_Vector, xAxis);

^

AHRS9DOF:233: error: 'Compass_Heading' was not declared in this scope

Compass_Heading();

^

AHRS9DOF:237: error: 'init_rotation_matrix' was not declared in this scope

init_rotation_matrix(DCM_Matrix, yaw, pitch, roll);

^

C:\Users\Parsian\Downloads\Compressed\GY80 CODE\GY80 CODE\AHR9DOF\AHRS9DOF\AHRS9DOF.ino: In function 'void setup()':

AHRS9DOF:291: error: 'I2C_Init' was not declared in this scope

I2C_Init();

^

AHRS9DOF:292: error: 'Accel_Init' was not declared in this scope

Accel_Init();

^

AHRS9DOF:293: error: 'Magn_Init' was not declared in this scope

Magn_Init();

^

AHRS9DOF:294: error: 'Gyro_Init' was not declared in this scope

Gyro_Init();

^

AHRS9DOF:295: error: 'Pressure_Init' was not declared in this scope

Pressure_Init();

^

C:\Users\Parsian\Downloads\Compressed\GY80 CODE\GY80 CODE\AHR9DOF\AHRS9DOF\AHRS9DOF.ino: In function 'void loop()':

AHRS9DOF:317: error: 'Compass_Heading' was not declared in this scope

Compass_Heading(); // Calculate magnetic heading

^

AHRS9DOF:319: error: 'Matrix_update' was not declared in this scope

Matrix_update();

^

AHRS9DOF:320: error: 'Normalize' was not declared in this scope

Normalize();

^

AHRS9DOF:321: error: 'Drift_correction' was not declared in this scope

Drift_correction();

^

AHRS9DOF:322: error: 'Euler_angles' was not declared in this scope

Euler_angles();

^

exit status 1
'Read_Pressure' was not declared in this scope

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