Other Parts Discussed in Thread: TMS570LS3137
Hi,
I'm working with TMS570LS3137 and i'm trying to startup my I2C driver (Interrupts mode)
I try to communicate the TMS with an Accelerometer (MMA8451Q). This accelerometer has a Device Address 0x1C, but depends if you want to read or write, the final value of the Slave Address change to:
Write Command has a Device Address 0x38
Read Command has a Device Address 0x39
If I set as Slave Address 0x1C and I send a frame, then I can see the frame in the osciloscope. (In debbuger mode, I can see how the program arrives to breakpoints in ISR code)
But if I change the Slave address to any different value, then the frame is truncated (In debugger mode, the flow of the program never arrives to breakpoints in ISR cod)
void I2C_vInit(void)
{
I2C__tstMemMap *pstI2C = I2C__ADDR_PTR;
/** - i2c out of reset */
pstI2C->MDR = I2C__MDR_nIRS_MASK;
/* Set I2C mode */
pstI2C->MDR = (I2C__MDR_BC(0) | /* Bit count */
I2C__MDR_MST_MASK | /* Master/Slave mode */
I2C__MDR_STP_MASK | /* Stop Transmision */
I2C__MDR_TRX_MASK ); /* Transmitter enable */
/* 7-bit addressing mode */
/* Frame LEN */
pstI2C->CNT = 2;
/* Disable Interrupts */
pstI2C->IMR = 0;
/* Preescale */
pstI2C->PSC = I2C__PREESCALE_cfg;
/* Clock */
pstI2C->CLKH = I2C__CLK_cfg;
pstI2C->CLKL = I2C__CLK_cfg;
/* I2C mode */
pstI2C->FUN = 0;
/* Enable Interrupts */
pstI2C->IMR = I2C__IMR_RXRDYEN_MASK | I2C__IMR_SCDEN_MASK; /* Receive and Stop Condition */
pstI2C->MDR |= I2C__MDR_nIRS_MASK; /* i2c out of reset */
pstI2C->OAR = I2C__OWN_ADDRESS_cfg; /* set own address */
pstI2C->SAR = I2C__SLAVE_ADDRESS_cfg; /* set slave address */
}
void I2C_vSendBuffer(uint8 *pu8Data, uint16 u16Length)
{
volatile I2C__tstMemMap *pstI2C = I2C__ADDR_PTR;
I2C__stTransferData.u16Length = u16Length;
I2C__stTransferData.pu8Data = pu8Data;
pstI2C->MDR = ( I2C__MDR_nIRS_MASK |
I2C__MDR_MST_MASK | /* Master/Slave mode */
I2C__MDR_TRX_MASK | /* Transmitter enable */
I2C__MDR_STP_MASK ); /* Stop Transmision */
pstI2C->CNT = u16Length;
pstI2C->DXR = *I2C__stTransferData.pu8Data++;
pstI2C->MDR |= I2C__MDR_STT_MASK;
pstI2C->IMR |= I2C__IMR_TXRDYEN_MASK;
}
Regards
