DRV8301: STM32 DRV8301 SPI communication

Hi Ruben,

Debugging SPI communications can be a little tricky but a good place to start would be to check if you are able to read all the registers of the device and if you are seeing the default values mentioned in the datasheet. Are you able to post the SPI reads using a logic analyzer?

Keep in mind the SPI timing requirements as well as the SPI frame requirements:

Regards,

Yara

thank you for your reply this is the feed of the logic analyzer but i trying to configure the clk but got no luck with it. find i realy hard to understand which clk setting i have to use with the CPol and such.

thank you anyway.

Hi Ruben,

Yeah it seems like sCLK mightt be an issue, here is some code from out sensored trap code for SPI configuration

void Config_evm_spi(void)
{
    //Pin Config
    EALLOW;
    // SPI_MOSI
    GPIO_SetupPinOptions(16, GPIO_INPUT, GPIO_ASYNC | GPIO_PULLUP);
    // SPI_MISO
    GPIO_SetupPinOptions(17, GPIO_INPUT, GPIO_ASYNC | GPIO_PULLUP);
    // SPI_CS
    GPIO_SetupPinOptions(56, GPIO_INPUT, GPIO_ASYNC | GPIO_PULLUP);
    // SPI_CLK
    GPIO_SetupPinOptions(57, GPIO_INPUT, GPIO_ASYNC | GPIO_PULLUP);

    GPIO_SetupPinMux(16, GPIO_MUX_CPU1, 1);
    GPIO_SetupPinMux(17, GPIO_MUX_CPU1, 1);
    GPIO_SetupPinMux(56, GPIO_MUX_CPU1, 1);
    GPIO_SetupPinMux(57, GPIO_MUX_CPU1, 1);
    EDIS;

    EALLOW;
    ClkCfgRegs.LOSPCP.all = 0;
    EDIS;

    // Initialize SPI FIFO registers
    SpiaRegs.SPIFFTX.all=0xE040;
    SpiaRegs.SPIFFRX.all=0x2044;
    SpiaRegs.SPIFFCT.all=0x0;

    //SPI Settings
    SpiaRegs.SPICCR.bit.SPISWRESET = 0;     //SPI Reset On
    SpiaRegs.SPICCR.bit.CLKPOLARITY = 0;    //SCLK Active High
    SpiaRegs.SPICCR.bit.SPICHAR = 0x7;      //16-bit SPI char
    SpiaRegs.SPICCR.bit.SPILBK = 0;

    SpiaRegs.SPICTL.bit.OVERRUNINTENA = 0;  //No overrun interrupt
    SpiaRegs.SPICTL.bit.CLK_PHASE = 0;      //Phase 0
    SpiaRegs.SPICTL.bit.MASTER_SLAVE = 1;   //Master mode
    SpiaRegs.SPICTL.bit.TALK = 1;           //nSCS enabled
    SpiaRegs.SPICTL.bit.SPIINTENA = 0;      //TX/RX Interrupt Disabled

    SpiaRegs.SPIBRR.bit.SPI_BIT_RATE = ((25000000 / 1000000) - 1);              //Set baud rate to 1MHz
    SpiaRegs.SPIPRI.bit.FREE = 1;           //Set so breakpoints don't disturb transmission
    SpiaRegs.SPICCR.bit.SPISWRESET = 1;   //Exit SPI reset

}

You can also find firmware for most of our devices on the EVM page, although DRV8301 might be a little outdated I think, SPI communication can have quite a few similarities across our devices as long as they use close to the same SPI frame.

thank you im going to look into that.

Hi again,

I got the clock working now im sending data to the drv but i dont get a good respones Im still not sure and cant find a good answer for what the baudrate should be for the CPOL en CHPA settings

Hi Ruben,

Correct me if I'm wrong but it looks like SDI is red and SDO is orange/yellow and you are trying to read register address 0x00 correct? Looks like you are getting a GVDD_UV fault?

Are you able to measure GVDD?

Also can you read all the registers to see if they are responding back with the default values?

Also I'm not sure if this is what you're looking for or not but the baud rate that was set during the SPI configuration was 1MHz

Regards,

Yara