required primary expression

[umesh 1]

hi

i am getting the error as

Average_New.cpp: In function 'void setup()':
Average_New.cpp:9:35: error: expected primary-expression before 'int'

 

the code is as follows:

 

void setup()
{
Serial.begin(9600);
pinMode(GREEN_LED, OUTPUT);
pinMode(RED_LED, OUTPUT);
pinMode(PUSH2, INPUT_PULLUP);
attachInterrupt(PUSH2,  calibrate(int maxvalue), FALLING);
}

 

void calibrate(int maxValue)
{
  if(maxValue<threshold)
  maxValue=threshold;
}
 

 

how to solve this problem?? what is mean by primary expression?

[L.R.A 78]

simple:

attachInterrupt(PUSH2,  calibrate(int maxvalue), FALLING);

                                                            /\ 

                                                     why do you have a function prototype here? it should just be "calibrate"

[umesh 1]

if i put only function name:

 

attachInterrupt(PUSH2,  calibrate, FALLING);

 

then it is showing this error:

Average_New.cpp: In function 'void setup()':
Average_New.cpp:9:43: error: invalid conversion from 'void (*)(int)' to 'void (*)()' [-fpermissive]
C:\ti\energia-0101E0016-windows\energia-0101E0016\hardware\msp430\cores\msp430/Energia.h:212:6: error:   initializing argument 2 of 'void attachInterrupt(uint8_t, void (*)(), int)' [-fpermissive]
 

[Rei Vilo 695]

Functions for interrupts should be void function(void). No parameters allowed.

[umesh 1]

if i put only  void function(void)

still it is getting error as

Average_New.cpp: In function 'void setup()':
Average_New.cpp:9:35: error: expected primary-expression before void

[igor 163]

if i put only  void function(void)

still it is getting error as

Where did you make the function take a void argument? Need to do in function definition, just leave function name in call.

 

void calibrate(void)
{
  if(maxValue<threshold)
  maxValue=threshold;
}

[Rei Vilo 695]

Help yourself: http://energia.nu/reference/attachinterrupt