Re: ADIS16448 can't return ID during one read

Hello  zhai_m

I am also working with stm32f407 & trying to read the ADIS16448

Since you have experience now in reading ADIS via stm32, I want to ask you if possible, to explain me what is the best configuration for reading adis output ?

I saw that you have set CPHA to 2.edge while the datasheet says 1.edge. I tried both but i couldn't give device id yet.

I have also tried to use following lines of code to read device ID but it is not successful. what changes should be done ?

Thank you in advance for your help.

address : 0x56

uint8_t ADIS_GetData(uint8_t adress)

{

        GPIO_ResetBits(GPIOC, GPIO_Pin_4);                       // Select Device

        adress = 0x8000 | adress;

         while(!SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE));  //transmit buffer empty?

        SPI_I2S_SendData(SPI1, adress);

        while(!SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE)); //data received?

        SPI_I2S_ReceiveData(SPI1);        //Clear RXNE bit

do {

         AD_I=GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_4);

       }while(AD_I==0);       

        while(!SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE));  //transmit buffer empty?

        SPI_I2S_SendData(SPI1, 0x00);        //Dummy byte to generate clock

        while(!SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE)); //data received?

        GPIO_SetBits(GPIOC, GPIO_Pin_4);                           // De-select Device

        return SPI_I2S_ReceiveData(SPI1); //return reveiced data

}