Linux/DS90UB964-Q1: I can't read registers for 913/ov10640.

Hello,

Can you clarify your system setup? Are you using a 964 EVM +TDAx3?

Or are you using your own board or just the 964 EVM?

It would be helpful to share the full procedure as well (what script you are using to initialize 913/ov10640) and exactly the command you are using to read from the 913/ov10640.

Regards,
Zoe

hi Zoe

4*ov10640->4*du90ub913->ds90ub964->ov490->tda2x
using ov490 api

void HostControl_GetEx(unsigned char host_cmd, unsigned char* paraIn, unsigned short
numberIn, unsigned char* paraOut, unsigned short numberOut)
{
unsigned short i = 0;
//Host reset OV490_status_register;
I2C_Write8(OV490_STATUS_ADDR, 0);
// Host write parameters to OV490 SRAM;
For (i=0; i< numberIn; i++)
{
I2C_Write8(HOST_CMD_PARA_ADDR+i, *(paraIn+i));
}
//Host send I2C CMD to OV490 to start task:
I2C_Write8(OV490_HOST_INT_ADDR, host_cmd);
// Host check OV490_status_register val to determine whether the task is
finished or not while (I2C_Read8(OV490_STATUS_ADDR) != STATUS_FINISH)
{
// if task is not finished, wait n ms;
Host_wait(n);
}
// Host read results from OV490 SRAM;
For (i=0; i< numberOut; i++)
{
*( paraOut +i) = I2C_Read8(HOST_CMD_RESULT_ADDR+i);
}
}


unsigned char paraIn[5] = {
0x7B, // [7:1], slave address: 0x7A, [0], 1: read
0x00, //high 8 bit address
0x01, //low 8 bit address
0x00, //reserved
0x00 //8bit address access
};
unsigned char value=0;
HostControl_GetEx(CMD_SNR_REG_ACCESS, paraIn, sizeof(paraIn), &value,1);

With the above API, first set the address to 964 0x7a.The value of 0x65 for 964 is then read.The register of 10640 is read with this value.The register of 913 is accessed through the value of the 0x5c register.Access the different 913/1640 by setting the 0x4c register of 964.

thanks.