Tool/software: Code Composer Studio
Dear TI team:
my question as fellow:
the pin of AT24C08 A0、A1、A2、WP connect GND
#define EEPROM_SLAVE_ADDR (0xA0 >> 1) （p0 p1=00 ：default comunication with block zero）
void Init_I2c(void)
{
GpioCtrlRegs.GPBPUD.bit.GPIO32 = 0; // Enable pull-up for GPIO32 (SDAA)
GpioCtrlRegs.GPBPUD.bit.GPIO33 = 0; // Enable pull-up for GPIO33 (SCLA)
GpioCtrlRegs.GPBQSEL1.bit.GPIO32 = 3; // Asynch input GPIO32 (SDAA)
GpioCtrlRegs.GPBQSEL1.bit.GPIO33 = 3; // Asynch input GPIO33 (SCLA)
GpioCtrlRegs.GPBMUX1.bit.GPIO32 = 1; // Configure GPIO32 for SDAA operation
GpioCtrlRegs.GPBMUX1.bit.GPIO33 = 1; // Configure GPIO33 for SCLA operation
// Initialize I2C
I2caRegs.I2CMDR.all = 0;//I2C reset
I2caRegs.I2CPSC.all = 5; // Prescaler - need 7-12 Mhz on module clk 60Mhz/(5+1)=10mhz system clk is 60M，using Internal Oscillator 1
//clk=100khz
I2caRegs.I2CCLKL = 50; // NOTE: must be non zero
I2caRegs.I2CCLKH = 40; // NOTE: must be non zero
// I2caRegs.I2CIER.all = 0x24; // Enable SCD & ARDY __interrupts
I2caRegs.I2CIER.all = 0x00; // no __interrupts
I2caRegs.I2CMDR.bit.IRS = 1;//I2C enable whether is or not the pin of SCL can detect square ware after set IRS? if not when is SCL can detect square ware???
I2caRegs.I2CMDR.bit.FREE = 1;//interrupt
I2caRegs.I2CFFTX.all = 0x6040; // Enable FIFO mode and TXFIFO
I2caRegs.I2CFFRX.all = 0x2044; // Enable RXFIFO, clear RXFFINT,
}
curr_Msg.MsgStatus = I2C_MSGSTAT_SEND_WITHSTOP;
curr_Msg.SlaveAddress = EEPROM_SLAVE_ADDR;
// curr_Msg.MemoryHighAddr = paramData[1];
curr_Msg.MemoryLowAddr = paramData[2];
curr_Msg.NumOfBytes =1;
curr_Msg.MsgBuffer[0] = paramData[4];
I2CA_WriteData(&curr_Msg);//use fellow function?
Uint16 I2CA_WriteData( struct I2CMSG* msg)
{
Uint16 i;
// 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 (I2caRegs.I2CMDR.bit.STP == 1)
{
return I2C_STP_NOT_READY_ERROR;
}
// Setup slave address
I2caRegs.I2CSAR = msg->SlaveAddress;
// Check if bus busy
if (I2caRegs.I2CSTR.bit.BB == 1)
{
return I2C_BUS_BUSY_ERROR;
}
// Setup number of bytes to send
// MsgBuffer + Address
I2caRegs.I2CCNT = msg->NumOfBytes+1;
// I2caRegs.I2CDXR = msg->MemoryHighAddr;
// Setup data to send
I2caRegs.I2CDXR = msg->MemoryLowAddr;
for (i=0; i<msg->NumOfBytes; i++)
{
I2caRegs.I2CDXR = *(msg->MsgBuffer+i);
}
I2caRegs.I2CFFTX.bit.TXFFINTCLR =1;
/*
* clear flag bit
*/
// Send start as master transmitter
I2caRegs.I2CMDR.all = 0x6E20;// software run this ,the pin of SCL and SDA cannot detect ware ,and why? and I2CFFTX.bit.TXFFST =I2CCNT ,why???
while(I2caRegs.I2CFFTX.bit.TXFFST !=0){}//procedure stop this ????
//系列上调试过的没有什么问题，只是更改了一个EEPROM内部写入的地址，望指点
if(I2caRegs.I2CSTR.bit.SCD == 1)
I2caRegs.I2CSTR.bit.SCD = 1;
/*
* SCD=1 清楚SCD 和NACK位
*/
return I2C_SUCCESS;
}
procedure above have tested on TMS320F28377 control AT24C64,and resualt is OK .but on this condition donot work,
Thank you in advance!
Best regards!
