I am using a PIC16F877A and on that chip I am using both the CCP pins to control two separate motors.
The program will send the same PWM to both motors at some situations.
I want to make sure that both motors are running at the same speed when I do that so I am putting micro switches on both motors and want to count the ON/OFF change on each switch to determine if both motors are running at the same speed.
To do that I have to use the CCP pins in capture mode but since I'm already using them to produce PWM signals to control the motors, I need to use another PIC16F877A chip for the task.
I tried to connect the two chips using the SPI interface method but I'm not quiet sure that I'm doing it the right way.
I programmed both chips separately and then removed the (slave) chip from the programmer and connected the SDO, SDI and SCK on both chips as shown in the manual
Now:
do I need to connect 5V and ground from the Master to the Slave chip?
is there a special command that I need to use for sending data from one chip to another?
cause now I just tell the slave chip to read a signal, store it in a variable and then make the SDI pin = the variable
btw: I am using PIC Basic Pro compiler
thank you in advance for your help
The program will send the same PWM to both motors at some situations.
I want to make sure that both motors are running at the same speed when I do that so I am putting micro switches on both motors and want to count the ON/OFF change on each switch to determine if both motors are running at the same speed.
To do that I have to use the CCP pins in capture mode but since I'm already using them to produce PWM signals to control the motors, I need to use another PIC16F877A chip for the task.
I tried to connect the two chips using the SPI interface method but I'm not quiet sure that I'm doing it the right way.
I programmed both chips separately and then removed the (slave) chip from the programmer and connected the SDO, SDI and SCK on both chips as shown in the manual
Now:
do I need to connect 5V and ground from the Master to the Slave chip?
is there a special command that I need to use for sending data from one chip to another?
cause now I just tell the slave chip to read a signal, store it in a variable and then make the SDI pin = the variable
btw: I am using PIC Basic Pro compiler
thank you in advance for your help
