atmega to serial communication

i want to know how u overcame the problem!!!! please ma frnd i m ri8 now under pressure of completing ma project!!!

i have a stepper motor connected to atmega 16

1. it will take 1 step
2. will send "1" to matlab
3. as my matlab gets 1 it takes picture detects red and sends "2" to atmega
4. asa atmega recieves 2 shooting mechanism is triggered
5. if matlab dont detect red it will send "3" to atmega
6. as atmega gets "3" stepper motor triggers to next step.

this is algorithm

here is ma matlab code

s = serial('COM1')

fopen(s)

fwrite(s,'2(if red) 3(if not red)')

now tel me the atmega code!!!

how should i accept the value passed by matlab in atmega!!! how should that variable be declared and al rest!!!

pls help... i have switch case controlled programme in atmega pls help

[Walter Roberson]

I find multiple possible matches for what an "atmega" might be. Most of the matches suggest it is an embedded device with multiple functions. Unless you are using it as the target for the Real Time Workshop, the methods by which you program the device would be outside of the scope of this resource.

Answer 1

[Radhika]

ATMel should be able to help you program the MCU.

On MATLAB side, first read response from Atmega using,

    fread(s)

To write to MCU use

fwrite(s,2) % For e.g.

Remember you will have to use appropriate logic in MATLAB to write correct values when red is detected.