i am using myrpi variable inside a while loop. i am gettng an error as undefine function or variable myrpi. code is " if isempty(bbox) disp('No one is Here turn off all connection')else disp('someone is here in the room')"Please help

2018 4 8
2 个回答
回答已采纳
更新时间：2018 4 9
6 次查看（30 天）

0 个投票

code:
if isempty(bbox)
disp('No one is Here turn off all connection')
else
disp('someone is here in the room turn on supply ')
for i = 1:10
writeDigitalPin(rpi, 4, 1);
pause(0.5);
writeDigitalPin(rpi, 4, 0);
pause(0.5);
end
error:
Undefined function or variable 'rpi'.
Error in finalprogram1 (line 27)
writeDigitalPin(rpi, 4, 1);

请先登录，再回答此问题。

 采纳的回答

Von Duesenberg
Von Duesenberg 2018-4-9
编辑：Von Duesenberg 2018-4-9

1 个投票

I am not sure what the first clearvars is doing(the formatting of your code as it appears here probably lacks a number of end of lines characters) but the second one clears all variables except a variable called mypi... you called your raspi object rpi (not mypi), so it gets deleted by the call to clearvars. In other words, the following should do the trick:
clearvars -except rpi myCam flag

更多回答（1 个）

sanjay singh
sanjay singh 2018-4-8
编辑：Walter Roberson 2018-4-9

0 个投票

this is the whole program , i have initialized the rpi variable
%setup Raspberry pi
clearvars
rpi= raspi('192.168.43.142','pi','raspberry');
myCam= cameraboard(rpi,'Resolution','640x480');
%camera snapshoot and detect face
flag=1;
while flag
clearvars -except mypi myCam flag
mysnap= snapshot(myCam);
imshow(mysnap);
hold on
faceDetector = vision.CascadeObjectDetector();
bbox =step(faceDetector,mysnap);
imageout=insertObjectAnnotation(mysnap,'rectangle',bbox,'face');
imshow(imageout);
title('Detected face');
drawnow
if isempty(bbox)
disp('No one is Here turn off all connection')
writeDigitalPin(rpi, 4, 0);
pause(0.5);
else
disp('someone is here in the room turn on supply ')
for i = 1:10
writeDigitalPin(rpi, 4, 1);
pause(0.5);
end
end
end

类别

在 帮助中心 和 File Exchange 中查找有关 MATLAB Support Package for Raspberry Pi Hardware 的更多信息

产品

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by