Other Parts Discussed in Thread: C2000WARE
Greetings,
I have a problem with the IPC1 interrupt function. when I run the code of cpu2 is not entering the interrupt function. I tried to track the problem but I am not able to know wither it is in CPU1 code or CPU2 code. I tried to see the examples in C2000Ware_4_02_00_00 but I couldn't benefit from them. If anyone can help me to solve this problem I will be so grateful. The codes of CPU1 and CPU2 are attached below.
Thanks,
CPU1: code C++
#include "F28x_Project.h"
#include <math.h>
//#include"KF.h"
#include "UKF_IMU.h"
#include "F28x_Project.h"
#include "F2837xD_Ipc_drivers.h"
//
//I2C connected with MPU6050 "IMU"
//
#define I2C_SLAVE_ADDR 0x68
#define I2C_NUMBYTES1 2
#define I2C_NUMBYTES2 1
#define MPU6050_ADDRESS 0x00D0
#define MPU6050_RA_SMPLRT_DIV 0x0019
#define MPU6050_RA_CONFIG 0x001A
#define MPU6050_RA_GYRO_CONFIG 0x001B
#define MPU6050_RA_ACCEL_CONFIG 0x001C
#define MPU6050_RA_FF_THR 0x001D
#define MPU6050_RA_FF_DUR 0x001E
#define MPU6050_RA_MOT_THR 0x001F
#define MPU6050_RA_MOT_DUR 0x0020
#define MPU6050_RA_ZRMOT_THR 0x0021
#define MPU6050_RA_ZRMOT_DUR 0x0022
#define MPU6050_RA_FIFO_EN 0x0023
#define MPU6050_RA_I2C_MST_CTRL 0x0024
#define MPU6050_RA_I2C_MST_STATUS 0x0036
#define MPU6050_RA_INT_PIN_CFG 0x0037
#define MPU6050_RA_INT_ENABLE 0x0038
#define MPU6050_RA_DMP_INT_STATUS 0x0039
#define MPU6050_RA_INT_STATUS 0x003A
#define MPU6050_RA_ACCEL_XOUT_H 0x003B
#define MPU6050_RA_ACCEL_XOUT_L 0x003C
#define MPU6050_RA_ACCEL_YOUT_H 0x003D
#define MPU6050_RA_ACCEL_YOUT_L 0x003E
#define MPU6050_RA_ACCEL_ZOUT_H 0x003F
#define MPU6050_RA_ACCEL_ZOUT_L 0x0040
#define MPU6050_RA_TEMP_OUT_H 0x0041
#define MPU6050_RA_TEMP_OUT_L 0x0042
#define MPU6050_RA_GYRO_XOUT_H 0x0043
#define MPU6050_RA_GYRO_XOUT_L 0x0044
#define MPU6050_RA_GYRO_YOUT_H 0x0045
#define MPU6050_RA_GYRO_YOUT_L 0x0046
#define MPU6050_RA_GYRO_ZOUT_H 0x0047
#define MPU6050_RA_GYRO_ZOUT_L 0x0048
#define MPU6050_RA_USER_CTRL 0x006A
#define MPU6050_RA_PWR_MGMT_1 0x006B
#define MPU6050_RA_PWR_MGMT_2 0x006C
#define MPU6050_RA_BANK_SEL 0x006D
#define MPU6050_RA_MEM_START_ADDR 0x006E
#define MPU6050_RA_MEM_R_W 0x006F
#define MPU6050_RA_DMP_CFG_1 0x0070
#define MPU6050_RA_DMP_CFG_2 0x0071
//#define RESTRICT_PITCH
#define DEG_RAD 0.017453292
//
// function to initialize I2C peripheral
//
void Ini_I2C (void);
//
// function to initialize timer0
//
void Ini_timer0(void);
//
// function to initialize timer1
void Ini_timer1(void);
//
// reading the Accelerometer data
//
void ACC_A(double x_dd, double y_dd, double z_dd);
//
//timer1 interrupt function
//
__interrupt void timer1_isr(void);
//
// interrupt function of I2C
//
__interrupt void i2c_int1a_isr(void);
//
// interrupt function to store data
//
__interrupt void IPPC0_ISR(void);
Uint16 FailCount;
Uint16 IntSource,Ind;
//
// Function Prototypes
//
struct I2CMsgIn {
Uint16 mode;
Uint16 device_ADDR;
Uint16 NUMBYTES;
Uint16 sensor_Reg;
//Uint16 sensor_XOUT_L;
int16 MsgBuffer[12];
};
struct I2CMsgOut {
Uint16 mode;
Uint16 device_ADDR;
Uint16 NUMBYTES;
Uint16 MPU6050_RA;
Uint16 outMsg;
};
struct I2CMsgIn *CurrentMsgPtr;
struct I2CMsgOut *CurrentMsgPtrW;
Uint16 I2cb_WriteData(struct I2CMsgOut *msg);
Uint16 I2cb_ReadData(struct I2CMsgIn *msg);
int i,j,k,k1,k2,k3,k4,k5,a,f;
double dx,dy,dz,accX,accY,accZ;
double dx_f,dy_f,dz_f,accX_f,accY_f,accZ_f,tt,ts;
double in_buffer[6][20];
double temp1,temp2,temp3,temp4,temp5,temp6;
double roll,pitch,KF_roll,KF_pitch,AR;
int GGG, counter2;
Uint32 cpusend;
UKF R_UKF,P_UKF;
void main(void)
{
struct I2CMsgIn I2C_Msgin;
struct I2CMsgOut I2C_Msgout;
I2C_Msgin.device_ADDR=0x68;
I2C_Msgin.NUMBYTES=1;
I2C_Msgout.device_ADDR=0x68;
I2C_Msgout.NUMBYTES=2;
//
// Initialize System Control:
//
InitSysCtrl();
//
// initialize GPIO
//
InitGpio();
//
// connect SCIB with CPU2 for Bluetooth connection
//
EALLOW;
DevCfgRegs.CPUSEL5.bit.SCI_B =1;
EDIS;
// GPIO_SetupPinMux(40, GPIO_MUX_CPU1, 1);
// GPIO_SetupPinMux(41, GPIO_MUX_CPU1, 1);
//
// Give CPU2 Control of the GPIO19 and GPIO18
//
GPIO_SetupPinMux(19, GPIO_MUX_CPU2, 2);
GPIO_SetupPinOptions(19, GPIO_INPUT, GPIO_PUSHPULL);
GPIO_SetupPinMux(18, GPIO_MUX_CPU2, 2);
GPIO_SetupPinOptions(18, GPIO_OUTPUT, GPIO_ASYNC);
//
//Clear all interrupts and initialize PIE vector table:
//
DINT;
//
// Initialize PIE control registers to their default state.
//
InitPieCtrl();
//
// Disable CPU interrupts and clear all CPU interrupt flags:
//
IER |= 0x0000;
IFR=0x0000;
IpcRegs.IPCCLR.bit.IPC0= 1;
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
//
// Initialize the PIE vector table with pointers to the shell Interrupt
// Service Routines (ISR)
//
InitPieVectTable();
//
// Interrupts that are used in this example are re-mapped to
// ISR functions found within this file.
//
EALLOW; // This is needed to write to EALLOW protected registers
PieVectTable.TIMER1_INT = &timer1_isr; //assign interrupt function of timer1
PieVectTable.IPC0_INT = &IPPC0_ISR; // assign interrupt function of IPC0
PieVectTable.I2CB_INT = &i2c_int1a_isr;//assign interrupt function of I2cb
EDIS; // This is needed to disable write to EALLOW protected registers
//
//Enable vector fetching from ePIE block. This bit must be set to 1 for peripheral interrupts to work.
//
EALLOW;
PieCtrlRegs.PIECTRL.bit.ENPIE = 1;
IER |= M_INT1;
EINT;
EDIS;
//
//clear IPC flags
//
IpcRegs.IPCCLR.all= 0xFFFFFFFF;
//
//enable IPC Interrupts IN the PIE
//
PieCtrlRegs.PIEIER1.bit.INTx13= 1;
//
//enable timer1 interrupts IN PIE
//
PieCtrlRegs.PIEIER1.bit.INTx7=1;
//
// Enable CPU INT13 which is connected to Timer1 interrupt:
//
IER |= M_INT13;
EINT;
//
// Enable I2CB __interrupt 3 in the PIE: Group 8 __interrupt 3 table page 102 manul
//
PieCtrlRegs.PIEIER8.bit.INTx3 = 1;
//
// Enable CPU INT8 which is connected to PIE group 8
//
IER |= M_INT8;
EINT; // Enable Global interrupt INTM
ERTM; // Enable Global realtime interrupt DBGM
//
//I2C initialization
//
Ini_I2C();
//
//timer0 initialization
//
Ini_timer0();
//
//timer1 initialization
//
Ini_timer1();
//wait here until CPU2 is ready
while(IpcRegs.IPCSTS.bit.IPC17 != 1)
{
}
IpcRegs.IPCACK.bit.IPC17 = 1;
CurrentMsgPtrW= &I2C_Msgout;
CurrentMsgPtrW->mode = I2C_MSGSTAT_WRITE_BUSY;
CurrentMsgPtrW->MPU6050_RA= MPU6050_RA_USER_CTRL;
CurrentMsgPtrW->NUMBYTES=2;
CurrentMsgPtrW->outMsg=0x00;
FailCount= I2cb_WriteData(CurrentMsgPtrW);
while(I2cbRegs.I2CMDR.bit.STP==1);
I2cbRegs.I2CSTR.bit.XSMT=0;
//I2cbRegs.I2CMDR.bit.STP=0;
//I2cbRegs.I2CSTR.bit.BB=0;
CurrentMsgPtrW->mode = I2C_MSGSTAT_WRITE_BUSY;
CurrentMsgPtrW->MPU6050_RA=MPU6050_RA_PWR_MGMT_1;
CurrentMsgPtrW->NUMBYTES=2;
CurrentMsgPtrW->outMsg=0x01;
FailCount= I2cb_WriteData(CurrentMsgPtrW);
while(I2cbRegs.I2CMDR.bit.STP==1);
I2cbRegs.I2CSTR.bit.XSMT=0;
//I2cbRegs.I2CMDR.bit.STP=0;
//I2cbRegs.I2CSTR.bit.BB=0;
CurrentMsgPtrW->mode = I2C_MSGSTAT_WRITE_BUSY;
CurrentMsgPtrW->MPU6050_RA= MPU6050_RA_INT_PIN_CFG;
CurrentMsgPtrW->NUMBYTES=2;
CurrentMsgPtrW->outMsg=0x02;
FailCount= I2cb_WriteData(CurrentMsgPtrW);
while(I2cbRegs.I2CMDR.bit.STP==1);
I2cbRegs.I2CSTR.bit.XSMT=0;
// I2cbRegs.I2CMDR.bit.STP=0;
// I2cbRegs.I2CSTR.bit.BB=0;
CurrentMsgPtrW->mode = I2C_MSGSTAT_WRITE_BUSY;
CurrentMsgPtrW->NUMBYTES=2;
CurrentMsgPtrW->device_ADDR=I2C_SLAVE_ADDR;
CurrentMsgPtrW->MPU6050_RA= MPU6050_RA_SMPLRT_DIV;
CurrentMsgPtrW->NUMBYTES=2;
CurrentMsgPtrW->outMsg=0x07;
FailCount= I2cb_WriteData(CurrentMsgPtrW);
while(I2cbRegs.I2CMDR.bit.STP==1);
I2cbRegs.I2CSTR.bit.XSMT=0;
// I2cbRegs.I2CMDR.bit.STP=0;
// I2cbRegs.I2CSTR.bit.BB=0;
CurrentMsgPtrW->mode = I2C_MSGSTAT_WRITE_BUSY;
CurrentMsgPtrW->MPU6050_RA= MPU6050_RA_CONFIG;
CurrentMsgPtrW->NUMBYTES=2;
CurrentMsgPtrW->outMsg=0x06;
FailCount= I2cb_WriteData(CurrentMsgPtrW);
while(I2cbRegs.I2CMDR.bit.STP==1);
I2cbRegs.I2CSTR.bit.XSMT=0;
//I2cbRegs.I2CMDR.bit.STP=0;
// I2cbRegs.I2CSTR.bit.BB=0;
CurrentMsgPtrW->mode = I2C_MSGSTAT_WRITE_BUSY;
CurrentMsgPtrW->MPU6050_RA= MPU6050_RA_GYRO_CONFIG;
CurrentMsgPtrW->NUMBYTES=2;
CurrentMsgPtrW->outMsg=0x00;
FailCount= I2cb_WriteData(CurrentMsgPtrW);
while(I2cbRegs.I2CMDR.bit.STP==1);
I2cbRegs.I2CSTR.bit.XSMT=0;
// I2cbRegs.I2CMDR.bit.STP=0;
// I2cbRegs.I2CSTR.bit.BB=0;
CurrentMsgPtrW->mode = I2C_MSGSTAT_WRITE_BUSY;
CurrentMsgPtrW->MPU6050_RA= MPU6050_RA_ACCEL_CONFIG;
CurrentMsgPtrW->NUMBYTES=2;
CurrentMsgPtrW->outMsg=0x00;
FailCount= I2cb_WriteData(CurrentMsgPtrW);
while(I2cbRegs.I2CMDR.bit.STP==1);
I2cbRegs.I2CSTR.bit.XSMT=0;
//I2cbRegs.I2CMDR.bit.STP=0;
// I2cbRegs.I2CSTR.bit.BB=0;
// Clear incoming message buffer
for (i = 0; i < 12; i++)
{I2C_Msgin.MsgBuffer[i] = 0x0000;}
i=0;k=0;
CurrentMsgPtr->mode=I2C_MSGSTAT_SEND_NOSTOP;
CurrentMsgPtr->sensor_Reg=MPU6050_RA_GYRO_XOUT_H;
CpuTimer1Regs.TCR.bit.TRB=1;
CpuTimer1Regs.TCR.bit.TSS=0;
//R_UKF.setAngle(0.00); // First set roll starting angle
// P_UKF.setAngle(0.00); // Then pitch
//f=1;
while(1)
{
CpuTimer0Regs.TCR.bit.TRB=1;
CpuTimer0Regs.TIM.all=0xFFFFFFFF;
CpuTimer0Regs.TCR.bit.TSS=0;
tt= CpuTimer0Regs.TIM.all;
CurrentMsgPtrW->mode = I2C_MSGSTAT_INACTIVE;
CurrentMsgPtr= &I2C_Msgin;
CurrentMsgPtr->device_ADDR=I2C_SLAVE_ADDR;
CurrentMsgPtr->NUMBYTES=1;
while(f==1)
{
switch(i)
{
case 0:CurrentMsgPtr->sensor_Reg=MPU6050_RA_GYRO_XOUT_H;
f=0;
break;
case 1:CurrentMsgPtr->sensor_Reg=MPU6050_RA_GYRO_XOUT_L;
f=0;
break;
case 2: dx=((CurrentMsgPtr->MsgBuffer[0] << 8) | CurrentMsgPtr->MsgBuffer[1]);
dx=(dx/131)*DEG_RAD;
in_buffer[0][k]=dx;
f=0;
k=k+1;
CurrentMsgPtr->sensor_Reg=MPU6050_RA_GYRO_YOUT_H;
break;
case 3: CurrentMsgPtr->sensor_Reg=MPU6050_RA_GYRO_YOUT_L;
f=0;
break;
case 4: dy=((CurrentMsgPtr->MsgBuffer[2] << 8) | CurrentMsgPtr->MsgBuffer[3]);
dy=(dy/131)*DEG_RAD;
in_buffer[1][k1]=dy;
k1=k1+1;
CurrentMsgPtr->sensor_Reg=MPU6050_RA_GYRO_ZOUT_H;
f=0;
break;
case 5: CurrentMsgPtr->sensor_Reg=MPU6050_RA_GYRO_ZOUT_L;
f=0;
break;
case 6: dz=((CurrentMsgPtr->MsgBuffer[4] << 8) | CurrentMsgPtr->MsgBuffer[5]);
dz=(dz/131)*DEG_RAD;
in_buffer[2][k2]=dz;
CurrentMsgPtr->sensor_Reg=MPU6050_RA_ACCEL_XOUT_H;
f=0;
k2=k2+1;
break;
case 7: CurrentMsgPtr->sensor_Reg=MPU6050_RA_ACCEL_XOUT_L;
f=0;
break;
case 8: accX=((CurrentMsgPtr->MsgBuffer[6] << 8) | CurrentMsgPtr->MsgBuffer[7]);
accX=accX;
in_buffer[3][k3]=accX;
k3=k3+1;
CurrentMsgPtr->sensor_Reg=MPU6050_RA_ACCEL_YOUT_H;
f=0;
break;
case 9: CurrentMsgPtr->sensor_Reg=MPU6050_RA_ACCEL_YOUT_L;
f=0;
break;
case 10: accY=((CurrentMsgPtr->MsgBuffer[8] << 8) | CurrentMsgPtr->MsgBuffer[9]);
accY=accY;
in_buffer[4][k4]=accY;
CurrentMsgPtr->sensor_Reg=MPU6050_RA_ACCEL_ZOUT_H;
f=0;
k4=k4+1;
break;
case 11: CurrentMsgPtr->sensor_Reg=MPU6050_RA_ACCEL_ZOUT_L;
f=0;
break;
case 12: accZ=((CurrentMsgPtr->MsgBuffer[10] << 8) | CurrentMsgPtr->MsgBuffer[11]);
accZ=accZ;
in_buffer[5][k5]=accZ;
CurrentMsgPtr->sensor_Reg=MPU6050_RA_GYRO_XOUT_H;
i=0;f=0;
k5=k5+1;
break;
}
}
if(a==1)
{CurrentMsgPtr->mode=I2cb_ReadData(CurrentMsgPtr);}
if(I2C_Msgout.mode == I2C_MSGSTAT_INACTIVE)
{
//
// Check incoming message status.
//
if(CurrentMsgPtr->mode == I2C_MSGSTAT_SEND_NOSTOP)
{
while(I2cb_ReadData(CurrentMsgPtr) != I2C_SUCCESS);
CurrentMsgPtr = &I2C_Msgin;
I2C_Msgin.mode = I2C_MSGSTAT_SEND_NOSTOP_BUSY;
}
//
//
else if(CurrentMsgPtr->mode == I2C_MSGSTAT_RESTART)
{
// Read data portion
while(I2cb_ReadData(CurrentMsgPtr) != I2C_SUCCESS);
}
}
//I2C_MSGSTAT_RESTART
//
CurrentMsgPtr->mode= I2C_MSGSTAT_RESTART;
for( j=0;j<20;j++)
{
temp1+=in_buffer[0][j];
temp2+=in_buffer[1][j];
temp3+=in_buffer[2][j];
temp4+=in_buffer[3][j];
temp5+=in_buffer[4][j];
temp6+=in_buffer[5][j];
}
dx_f=temp1/20;//0.006667
temp1=0;
dy_f=(temp2/20);//+0.148;
temp2=0;
dz_f=temp3/20;
temp3=0;
accX_f=temp4/20;
temp4=0;
accY_f=temp5/20;
temp5=0;
accZ_f=temp6/20;
temp6=0;
if(k>=20)
{k=0;}
if(k1>=20)
{k1=0;}
if(k2>=20)
{k2=0;}
if(k3>=20)
{k3=0;}
if(k4>=20)
{k4=0;}
if(k5>=20)
{k5=0;}
ACC_A(accX_f,accY_f,accZ_f);
// ACC_A(accX,accY,accZ);
if ((roll < -1.5708 && KF_roll > 1.5708) || (roll > 1.5708 && KF_roll < -1.5708))
{
//kalmanX.setAngle(roll);
R_UKF.setAngle(roll);
KF_roll = roll;
}
else
// KF_roll = kalmanX.getAngle(roll, dx_f, ts); // Calculate the angle using a Kalman filter
{ KF_roll=R_UKF.EstimatUKF(roll, dx_f, ts);
AR=KF_roll-0.72;
cpusend= AR*100;
}
// if (abs(KF_roll) > 1.5708)
// { dy_f = -dy_f; }// Invert rate, so it fits the restricted accelerometer reading
// KF_pitch = P_UKF.EstimatUKF(pitch, dy_f, ts);
ts= 0.00000001*(tt-CpuTimer0Regs.TIM.all);
}
}
void Ini_I2C()
{
EALLOW;
//J1 ....(50-49)I2C "GPIO 40 & 41" (blue 10)
GpioCtrlRegs.GPBGMUX1.bit.GPIO40=1;GpioCtrlRegs.GPBMUX1.bit.GPIO40=2;
GpioCtrlRegs.GPBGMUX1.bit.GPIO41=1;GpioCtrlRegs.GPBMUX1.bit.GPIO41=2;
GpioCtrlRegs.GPBPUD.bit.GPIO40 = 0;
GpioCtrlRegs.GPBPUD.bit.GPIO41 = 0;
I2cbRegs.I2CSAR.all = 0x68; // Slave address - MPU6050
I2cbRegs.I2CPSC.all = 15; // Prescaler - need 7-12 Mhz on module clk
I2cbRegs.I2CCLKL = 10; // NOTE: must be non zero 275 work for EKF
I2cbRegs.I2CCLKH = 5; // NOTE: must be non zero 5 work for EKF
I2cbRegs.I2CIER.all =0x24; // Enable SCD & ARDY __interrupts
I2cbRegs.I2CMDR.all = 0x0020; // Take I2C out of reset
// Stop I2C when suspended
I2cbRegs.I2CFFTX.all = 0x6000; // Enable FIFO mode and TXFIFO
I2cbRegs.I2CFFRX.all = 0x2040; // Enable RXFIFO, clear RXFFINT,
EDIS;
}
void Ini_timer0()
{
EALLOW; // This is needed to write to EALLOW protected registers
CpuSysRegs.PCLKCR0.bit.CPUTIMER0=1;
CpuTimer0Regs.TIM.all=0xFFFFFFFF;
CpuTimer0Regs.PRD.bit.LSW=0xFFFF;
CpuTimer0Regs.PRD.bit.MSW=0xFFFF;
CpuTimer0Regs.TCR.bit.TIE=0;
CpuTimer0Regs.TCR.bit.TIF=1;
CpuTimer0Regs.TCR.bit.TSS=0;
CpuTimer0Regs.TCR.bit.TRB=1;
CpuTimer0Regs.TCR.bit.FREE=1;
CpuTimer0Regs.TCR.bit.SOFT=0;
CpuTimer0Regs.TPR.bit.TDDR=0x00;
CpuTimer0Regs.TPR.bit.PSC=0x0000;
CpuTimer0Regs.TPRH.bit.TDDRH=0x00;
EDIS;
}
void Ini_timer1()
{
EALLOW; // This is needed to write to EALLOW protected registers
CpuSysRegs.PCLKCR0.bit.CPUTIMER1=1;
CpuTimer1Regs.TIM.all=0x00000FA0;
CpuTimer1Regs.PRD.bit.LSW=0x0FA0;
CpuTimer1Regs.PRD.bit.MSW=0x0000;
CpuTimer1Regs.TCR.bit.TIE=1;
CpuTimer1Regs.TCR.bit.TIF=1;
CpuTimer1Regs.TCR.bit.TSS=0;
CpuTimer1Regs.TCR.bit.TRB=1;
CpuTimer1Regs.TCR.bit.FREE=1;
CpuTimer1Regs.TCR.bit.SOFT=0;
CpuTimer1Regs.TPR.bit.TDDR=0x09;
CpuTimer1Regs.TPR.bit.PSC=0x0000;
CpuTimer1Regs.TPRH.bit.TDDRH=0x00;
EDIS;
}
Uint16 I2cb_ReadData(struct I2CMsgIn *msg)
{
if(I2cbRegs.I2CMDR.bit.STP == 1)
{
return I2C_STP_NOT_READY_ERROR;
}
if(msg->mode ==I2C_SUCCESS)
{
msg->mode = I2C_MSGSTAT_RESTART;
}
I2cbRegs.I2CSAR.all =msg->device_ADDR;
if(msg->mode == I2C_MSGSTAT_SEND_NOSTOP)
{
if(I2cbRegs.I2CSTR.bit.BB == 1)
{
return I2C_BUS_BUSY_ERROR;
}
I2cbRegs.I2CDXR.all =msg->sensor_Reg;
I2cbRegs.I2CMDR.all = 0x2620;
while(I2cbRegs.I2CMDR.bit.STP==1);
}
else if(msg->mode == I2C_MSGSTAT_RESTART)
{
I2cbRegs.I2CCNT = 1; // Setup how many bytes to expect
I2cbRegs.I2CMDR.all = 0x2C20; // Send restart as master receiver
}
return I2C_SUCCESS;
}
Uint16 I2cb_WriteData(struct I2CMsgOut *msg)
{
// Wait until the STP bit is cleared from any previous master communication.
// Clearing of this bit by the module is delayed until after the SCD bit is
// set. If this bit is not checked prior to initiating a new message, the
// I2C could get confused.
//
if(I2cbRegs.I2CMDR.bit.STP == 1)
{
return I2C_STP_NOT_READY_ERROR;
}
//
// Setup slave address
//
I2cbRegs.I2CSAR.all = msg->device_ADDR;
//
// Check if bus busy
//
if(I2cbRegs.I2CSTR.bit.BB == 1)
{
return I2C_BUS_BUSY_ERROR;
}
I2cbRegs.I2CCNT =2;
I2cbRegs.I2CDXR.all = msg->MPU6050_RA;
I2cbRegs.I2CDXR.all =msg->outMsg;
//
// Send start as master transmitter
//
I2cbRegs.I2CMDR.all = 0x6E20;
return 0;
}
__interrupt void i2c_int1a_isr(void)
{
//
// Read __interrupt source
//
IntSource = I2cbRegs.I2CISRC.all;
if(IntSource == I2C_SCD_ISRC)
{
//
// If completed message was writing data, reset msg to inactive state
//
if(CurrentMsgPtrW->mode == I2C_MSGSTAT_WRITE_BUSY)
{
CurrentMsgPtrW->mode = I2C_MSGSTAT_INACTIVE;
}
else
{
CurrentMsgPtr->MsgBuffer[i]=I2cbRegs.I2CDRR.all;
i=i+1;
f=1;
// a=0;
}
}
else if(IntSource == I2C_ARDY_ISRC)
{
if(I2cbRegs.I2CSTR.bit.NACK == 1)
{
I2cbRegs.I2CMDR.bit.STP = 1;
I2cbRegs.I2CSTR.all = I2C_CLR_NACK_BIT;
}
else if(CurrentMsgPtr->mode == I2C_MSGSTAT_SEND_NOSTOP_BUSY)
{
CurrentMsgPtr->mode = I2C_MSGSTAT_RESTART;
}
}
else
{
//
// Generate some error due to invalid __interrupt source
//
__asm(" ESTOP0");
}
//
// Enable future I2C (PIE Group 8) __interrupts
//
PieCtrlRegs.PIEACK.all = PIEACK_GROUP8;
}
__interrupt void IPPC0_ISR(void)
{
IpcRegs.IPCACK.bit.IPC0 =1; // clear IPC flag
GGG = 15;
counter2++;
}
__interrupt void timer1_isr(void)
{
a++;
// CurrentMsgPtr->mode=I2CA_ReadData(CurrentMsgPtr);
CpuTimer1Regs.TCR.bit.TIF=1;
IpcRegs.IPCSENDDATA = cpusend; //write the results to IPC data register
IpcRegs.IPCSET.bit.IPC1 =1; // set the flag for CPU2
// IpcRegs.IPCSET.bit.IPC0 = 1;
}
//
void ACC_A(double x_dd, double y_dd, double z_dd)
{
float ss;
roll = atan2(y_dd,-z_dd);
ss=pow(z_dd*z_dd + y_dd*y_dd,0.5);
// pitch = atan2(x_dd,sqrt(y_dd*y_dd + z_dd*z_dd))/DEG_RAD;
if (y_dd<0)
{
pitch=(atan(x_dd/-ss));
}
else
{
pitch=(atan(x_dd/ss));
}
//pitch=pitch/DEG_RAD;
}
CPU2: code C
//
#include "F28x_Project.h"
#include "math.h"
#include <string.h>
#include <stdio.h>
//
// Global variable
//
float tt;
float ts;
int LoopCount;
float v=0;
int x=0;
char bb;
char *msg;
char *rdataB;
char *senddata; // char matrix will be used to send the data
// example data of the send gyro data
Uint32 *roll;
char msg1; //used to store the natural number
char msg2; // first decimal
char msg3; // second decimal
char msg4; // third decimal
Uint16 k=0; //counter for recived data inside the interrupt
Uint16 j=0; // counter to send the data inside the interrupt function
int i=0;
int z=0;
int t;
int counter;
int add;
//
// Function Prototypes
//
void Ini_timer0(void);
void scib_bluetooth_init(void); // initiate the SCI peripheral and sort its configurations
void scib_fifo_init(void); // also used to initiate the SCI peripheral
void scib_senddata(int a); // send one character
void scib_msg(char *msg); // used to send a group of characters
interrupt void scibReceiveIsr(void); // interrupt function to receive the command
interrupt void IPPC1_ISR(void); // interrupt function to store data
//
// Main
//
void main(void)
{
//
// Clear all __interrupts and initialize PIE vector table:
// Disable CPU __interrupts
//
DINT;
//
// Initialize PIE control registers to their default state.
// The default state is all PIE __interrupts disabled and flags
// are cleared.
// This function is found in the F2837xD_PieCtrl.c file.
//
InitPieCtrl();
//
// Disable CPU __interrupts and clear all CPU __interrupt flags:
//
IER = 0x0000;
IFR = 0x0000;
//
// Initialize the PIE vector table with pointers to the shell Interrupt
// Service Routines (ISR).
// This will populate the entire table, even if the __interrupt
// is not used in this example. This is useful for debug purposes.
// The shell ISR routines are found in F2837xD_DefaultIsr.c.
// This function is found in F2837xD_PieVect.c.
InitPieVectTable();
//
// Enable global Interrupts and higher priority real-time debug events:
//
EINT; // Enable Global interrupt INTM
ERTM; // Enable Global realtime interrupt DBGM
//
//clear IPC1 flag
//
IpcRegs.IPCCLR.bit.IPC1= 1;
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
//
//let CPU1 know that CPU2 is ready
//
IpcRegs.IPCSET.bit.IPC17=1;
//
//enable ISR of SCIB and IPC1
//
EALLOW; // This is needed to write to EALLOW protected registers
PieVectTable.SCIB_RX_INT = &scibReceiveIsr;
PieVectTable.IPC1_INT = &IPPC1_ISR;
EDIS; // This is needed to disable write to EALLOW protected registers
//
//clear IPC flags
//
//IpcRegs.IPCCLR.all= 0xFFFFFFFF;
//
//Enable vector fetching from ePIE block. This bit must be set to 1 for peripheral interrupts to work.
//
EALLOW;
PieCtrlRegs.PIECTRL.bit.ENPIE = 1;
EDIS;
//
// Enable CPU INT1 and INT9 which is connected to Upper PIE IPC INT0-3 and SCI:
//
IER = 0x101;
//
// Enable interrupts required for this example
//
PieCtrlRegs.PIEIER9.bit.INTx3 = 1; // PIE Group 9, INT3
PieCtrlRegs.PIEIER1.bit.INTx14 =1; // enable IPC1 PIE Interrupt
// PieCtrlRegs.PIEIER1.bit.INTx13 =1; // enable IPC1 PIE Interrupt
//
// Initialize the SCI FIFO
// Initialize SCI for Bluetooth
// Initialize timer0
//
scib_fifo_init();
scib_bluetooth_init();
Ini_timer0();
for(;;)
{
ts= 0.00000001*(tt-CpuTimer0Regs.TIM.all);
CpuTimer0Regs.TCR.bit.TRB=1;
CpuTimer0Regs.TIM.all=0xFFFFFFFF;
CpuTimer0Regs.TCR.bit.TSS=0;
tt= CpuTimer0Regs.TIM.all;
t++;
if (x==1 || x==2)
{
if(x==1)
{
v=sin(t);
}
if (x==2)
{
v= sin(t)+0.5*cos(0.5*t)+0.2*sin(2*t);
}
int hundreds,tens,ones;
//
// define the sign of the send number
//
char sign;
if(v>=0)
{
sign = '0';
}
else
{
sign = '1';
v=-v;
}
int v1 = v; // get the natural number
float v2 = v-v1; // get the decimals
int t = v2*1000; // make the decimals as natural numbers to send
//
// separate the ones and tens and hundreds
//
ones= t%10;
tens= (t/10)%10;
hundreds= (t/100)%10;
//
// convert the integers to charecters
//
msg1= v1 + '0';
msg2= hundreds+ '0';
msg3= tens+ '0';
msg4= ones+ '0';
//
// create the vectror to send
//
senddata[0]='\r';
senddata[1]='\n';
senddata[2]= sign;
senddata[3]= msg1;
senddata[4]='.';
senddata[5]=msg2;
senddata[6]=msg3;
senddata[7]=msg4;
senddata[8]='\n';
//
// send the data
//
for(k=0;k<=9;k++)
{
scib_senddata(senddata[k]);
}
}
}
}
//
// scia_echoback_init - Test 1,SCIA DLB, 8-bit word, baud rate 0x000F,
// default, 1 STOP bit, no parity
//
void scib_bluetooth_init()
{
//
// Note: Clocks were turned on to the SCIA peripheral
// in the InitSysCtrl() function
//
ScibRegs.SCICCR.all = 0x0007; // 1 stop bit, No loopback
// No parity,8 char bits,
// async mode, idle-line protocol
ScibRegs.SCICTL1.all = 0x0003; // enable TX, RX, internal SCICLK,
// Disable RX ERR, SLEEP, TXWAKE
ScibRegs.SCICTL2.bit.RXBKINTENA = 1;
ScibRegs.SCIFFRX.all = 0x2021;
//
// SCIA at 9600 baud
// @LSPCLK = 25 MHz (100 MHz SYSCLK) HBAUD = 0x01 and LBAUD = 0x45.
//
ScibRegs.SCIHBAUD.all = 0x0001;
ScibRegs.SCILBAUD.all = 0x0045;
ScibRegs.SCICTL1.all = 0x0023; // Relinquish SCI from Reset
}
//
// scib_xmit - Transmit a character from the SCI
//
void scib_senddata(int a)
{
while (ScibRegs.SCIFFTX.bit.TXFFST != 0) {}
ScibRegs.SCITXBUF.all =a;
}
//
// scia_msg - Transmit message via SCIA
//
void scib_msg(char * msg)
{
int i;
i = 0;
while(msg[i] != '\0')
{
scib_senddata(msg[i]);
i++;
}
}
//
// scia_fifo_init - Initialize the SCI FIFO
//
void scib_fifo_init()
{
ScibRegs.SCIFFTX.all = 0xE040;
ScibRegs.SCIFFRX.all = 0x2044;
ScibRegs.SCIFFCT.all = 0x0;
}
void Ini_timer0()
{
EALLOW; // This is needed to write to EALLOW protected registers
CpuSysRegs.PCLKCR0.bit.CPUTIMER0=1;
CpuTimer0Regs.TIM.all=0xFFFFFFFF;
CpuTimer0Regs.PRD.bit.LSW=0xFFFF;
CpuTimer0Regs.PRD.bit.MSW=0xFFFF;
CpuTimer0Regs.TCR.bit.TIE=0;
CpuTimer0Regs.TCR.bit.TIF=1;
CpuTimer0Regs.TCR.bit.TSS=0;
CpuTimer0Regs.TCR.bit.TRB=1;
CpuTimer0Regs.TCR.bit.FREE=1;
CpuTimer0Regs.TCR.bit.SOFT=0;
CpuTimer0Regs.TPR.bit.TDDR=0x00;
CpuTimer0Regs.TPR.bit.PSC=0x0000;
CpuTimer0Regs.TPRH.bit.TDDRH=0x00;
EDIS;
}
interrupt void scibReceiveIsr(void)
{
LoopCount++;
k++;
rdataB[k]=ScibRegs.SCIRXBUF.all; // Read data
/* while(j != 1)
{
scib_senddata(rdataB[j]);
j++;
}
j=0;*/
bb= (char)rdataB[k];
x= bb -'0';
z=x;
ScibRegs.SCIFFRX.bit.RXFFOVRCLR=1; // Clear Overflow flag
ScibRegs.SCIFFRX.bit.RXFFINTCLR=1; // Clear Interrupt flag
PieCtrlRegs.PIEACK.all|=0x100; // Issue PIE ack
}
interrupt void IPPC1_ISR(void)
{
IpcRegs.IPCACK.bit.IPC1 =1;
add++;
while (counter<=1560)
{
*roll++ = (Uint32) IpcRegs.IPCRECVDATA; //read results
counter++;
if (counter>=1560)
{counter =0;
// IpcRegs.IPCSENDDATA = 777;
// IpcRegs.IPCSET.bit.IPC0 = 1;// trigger IPC0 interrupt
// clear IPC flag
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
IpcRegs.IPCCLR.bit.IPC1= 1;
}
}
}
//
// End of file
//
