Hello
I connected to input 0 V - code from AD7671 is 32463. It is fine.
But when I repeat request the code is
32463 32591 32591 32463 32591 ....
32591 - 32463 = 128 - Where is low signif. bits ??
I checked with serial and parallel data mode.
My parallel code is:
AD7671_CS_1;
AD7671_RD_1;
while(GPIO_ReadPin(28));//wait busy
AD7671_CS_0;
AD7671_RD_0;
AD7671_result = GpioDataRegs.GPBDAT.all;
AD7671_RD_1;
AD7671_CS_1;
//start conversion
AD7671_CNVST_1;
AD7671_CNVST_0;
AD7671_CNVST_1;
-------------------------------------
My serial code is
AD7671_EXT_1;
AD7671_INVSCLK_0;
AD7671_RD_0;
AD7671_CS_1;
AD7671_SCLK_0;
AD7671_CNVST_1;
while(GPIO_ReadPin(28));//wait busy
AD7671_SCLK_0;
AD7671_SCLK_1;
AD7671_SCLK_0;
AD7671_CS_0;
d = 0;
for(j=0;j<16;j++)
{
AD7671_SCLK_1;
if(GpioDataRegs.GPBDAT.bit.GPIO56)//SDOUT
{
d |= (unsigned int)(1<<(15-j));
}
AD7671_SCLK_0;//D9
}
AD7671_result = d;
AD7671_CS_1;
//start conversion
AD7671_CNVST_0;
AD7671_CNVST_1;
AD7671_CNVST_0;
