DRV8323 SPI driver, released into public domain

drv8323.c

// **************************************************************************

//#include "cmsis_os.h"
#include "drv8323.h"

extern SPI_HandleTypeDef hspi3;

//default values for the DRV8323 registers
uint16_t DRV8323regDrvCtrl =
  0 << 9  | //DIS_CPUV
  1 << 8  | //DIS_GDF
  0 << 7  | //OTW_REP
  0 << 5  | //PWM_MODE
  0 << 4  | //1PWM_COM
  0 << 3  | //1PWM_DIR
  0 << 2  | //COAST
  0 << 1  | //BRAKE
  0;        //CLR_FLT

uint16_t DRV8323regGateDrvHS =
  3 << 8  | //LOCK
  11 << 4 | //IDRIVEP_HS
  15;       //IDRIVEN_HS			

uint16_t DRV8323regGateDrvLS =
  1 << 10 | //CBC
  2 << 8  | //TDRIVE
  15 << 4 | //IDRIVEP_LS
  15;       //IDRIVEN_LS			

uint16_t DRV8323regOcpCtrl =
  0 << 10 | //TRETRY
  1 << 8  | //DEAD_TIME
  1 << 6  | //OCP_MODE
  2 << 4  | //OCP_DEG
  0;        //VDS_LVL			

uint16_t DRV8323regCsaCtrl =
  1 << 10 | //CSA_FET
  1 << 9  | //VREF_DIV
  0 << 8  | //LS_REF
  2 << 6  | //CSA_GAIN
  0 << 5  | //DIS_SEN
  0 << 4  | //CSA_CAL_A
  0 << 3  | //CCSA_CAL_B
  0 << 2  | //CCSA_CAL_C
  3;        //CSEN_LVL	

uint16_t DRV8323_readSpi(uint8_t regAdr)
{
    uint16_t zerobuff = 0;
	uint16_t controlword = 0x8000 | (regAdr & 0x7) << 11; //MSbit =1 for read, address is 3 bits (MSbit is always 0), data is 11 bits
	uint16_t recbuff = 0xbeef;
	
	HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_RESET);
	HAL_SPI_TransmitReceive(&hspi3, (uint8_t*)(&controlword), (uint8_t*)(&recbuff), 1, 1000);
	HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_SET);
	return (0x7ff&recbuff);
}

void DRV8323_writeSpi(uint8_t regAdr, uint16_t regVal)
{
	uint16_t controlword = (regAdr & 0x7) << 11 | (regVal & 0x7ff); //MSbit =0 for write, address is 3 bits (MSbit is always 0), data is 11 bits
	
	HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_RESET);
	HAL_SPI_Transmit(&hspi3, (uint8_t*)(&controlword), 1, 1000);
	HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_SET);
	return;
}

void DRV8323_setupSpi()
{
    volatile uint16_t temp;
    HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12, GPIO_PIN_SET); //PB12 is enable to motor controller

	//In TI sample firmware http://www.ti.com/tool/tida-00774, DRV8323regGateDrvHS is written first, and it is written twice
	//In http://www.ti.com/tool/boostxl-drv8323rs, the 5 control register are just written once in order.
	DRV8323_writeSpi(ADR_DRV_CTRL, DRV8323regDrvCtrl);
	HAL_Delay(1);
	DRV8323_writeSpi(ADR_GATE_DRV_HS, DRV8323regGateDrvHS);
	HAL_Delay(1);
	DRV8323_writeSpi(ADR_GATE_DRV_LS, DRV8323regGateDrvLS);
	HAL_Delay(1);
	DRV8323_writeSpi(ADR_OCP_CTRL, DRV8323regOcpCtrl);
	HAL_Delay(1);
	DRV8323_writeSpi(ADR_CSA_CTRL, DRV8323regCsaCtrl);
	HAL_Delay(1);

    temp = DRV8323_readSpi(ADR_FAULT_STAT);
    temp = DRV8323_readSpi(ADR_VGS_STAT);
    temp = DRV8323_readSpi(ADR_DRV_CTRL);
    temp = DRV8323_readSpi(ADR_GATE_DRV_HS);
    temp = DRV8323_readSpi(ADR_GATE_DRV_LS);
    temp = DRV8323_readSpi(ADR_OCP_CTRL);
    temp = DRV8323_readSpi(ADR_CSA_CTRL);
	return;
}

Hi.I tried this on my custom pcb(stm32f405 and drv8323rs) but I am not able to figure out that the spi configured correctly or not becuase the dvdd pin of drv8323rs is not showing 3.3v. Can you tell me the configurations for enable and calibration pin of drv. I tried to pull up them both but it didn't worked.

@PurvaShendge I am going to be testing my personal board tomorrow but based on what I have done / the datasheet. I personally just shorted the calibration pin to high so it does auto offset calibration. The enable pin must be pulled high for the chip to be enabled. Are you sure the VM pin is getting at least 6V?