keil5call not to a functionDUOJIKONGZHI.c(30): error C81: call not to a function

#include "headfile.h"
#include "ADC.h"
#include "FUNCTION.h"

void SteerPID_Realize(float offset)
{
//当前误差，定义为寄存器变量，只能用于整型和字符型变量，提高运算速度
float iError, //当前误差
SteerErr,LastError; //
int PWM;
int P,D;
float LimitLeft,LimitRight;
int16 steer_middle = 760.0;
// static int err_sum = 0;
iError = offset; //计算当前误差

SteerErr =P * iError +D * (iError - LastError); //位置式PID算式
LastError = iError; //更新上次误差
PWM = steer_middle - SteerErr;

if (PWM < 0)
PWM = 0;

LimitLeft(660.0);
LimitRight(860.0); //限幅

// if(SystemData.Point>70) { PWM=steer_right;}
// if(SystemData.Point<10) { PWM=steer_left;}
SteerControl(PWM);
}