Dear All:
I am working on a project need to config I2C as a slave, to get datas from the Master. But I can get nothing, and the BB bit always be 1.
I can not even jump to the isr! When I config it as a Master to read eeprom, it works fine. But as a slave, it does not work. Please help!
Here is my code:
void InitI2C(void)
{
EALLOW;
SysCtrlRegs.PCLKCR0.bit.I2CAENCLK = 1; // I2C
EDIS;
// Initialize I2C-A:
InitI2CGpio();
// Initialize I2C
I2caRegs.I2CMDR.bit.IRS = 0;
// Initialize I2C
I2caRegs.I2COAR = 0x007C; // Own address
I2caRegs.I2CPSC.all = 5; // Prescaler - need 7-12 Mhz on module clk
I2caRegs.I2CCLKL = 10; // NOTE: must be non zero
I2caRegs.I2CCLKH = 5; // NOTE: must be non zero
I2caRegs.I2CSTR.bit.RRDY = 1; // Clear flag
I2caRegs.I2CIER.bit.RRDY = 1; // Enable Receive Interrupt
I2caRegs.I2CIER.bit.SCD = 1;
I2caRegs.I2CIER.bit.NACK = 1;
I2caRegs.I2CMDR.all = 0x0020; // Take I2C out of reset
// Stop I2C when suspended
EALLOW;
PieVectTable.I2CINT1A = &i2c_int1a_isr;
PieCtrlRegs.PIEIER8.bit.INTx1 = 1;
IER |= M_INT8;
PieCtrlRegs.PIEACK.all = 0xffff;
EDIS;
EINT; // Enable Global interrupt INTM
ERTM;
}
interrupt void i2c_int1a_isr(void) // I2C-A
{
Uint16 IntSource;
Uint16 i;
Uint16 uiFrameHead;
float fTmp;
// Read interrupt source
IntSource = I2caRegs.I2CISRC.bit.INTCODE & 0x7;
switch(IntSource)
{
case I2C_NO_ISRC: // =0
break;
case I2C_ARB_ISRC: // =1
break;
case I2C_NACK_ISRC: // =2
break;
case I2C_ARDY_ISRC: // =3
break;
case I2C_RX_ISRC: // =4
uiI2CData[uiI2CGetCount++] = I2caRegs.I2CDRR;
break;
case I2C_TX_ISRC: // =5
break;
case I2C_SCD_ISRC: // =6
break;
case I2C_AAS_ISRC: // =7
break;
default:
break; // Halt on invalid number.
}
// Enable further I2C (PIE Group 8) interrupts by acknowledging this one.
PieCtrlRegs.PIEACK.all = PIEACK_GROUP8;
}
}
