ASM330LHH didn't work in I2C with BLUENRG-LP

EPeng.1 · ‎2022-12-14

Here I used BLUENRG-LP SoC with ASM330LHH. We have the same schematic design in steval-IBD11V2A, like the first image. The second one is our schematic design.

My I2C configuration init function is like:

/**
  * @brief  Configures the I2C interface used for the sensor ASM330LHH.
  * @param  None
  * @retval None
  */
void BSP_I2C_Init(void)
{
  /* Initialize the GPIOs associated to the I2C port */
  BSP_I2C_DATA_GPIO_CLK_ENABLE();
  LL_GPIO_SetPinMode(BSP_I2C_DATA_GPIO_PORT, BSP_I2C_DATA_PIN, LL_GPIO_MODE_ALTERNATE);
  LL_GPIO_SetPinSpeed(BSP_I2C_DATA_GPIO_PORT, BSP_I2C_DATA_PIN, LL_GPIO_SPEED_FREQ_HIGH);
  LL_GPIO_SetPinOutputType(BSP_I2C_DATA_GPIO_PORT, BSP_I2C_DATA_PIN, LL_GPIO_OUTPUT_OPENDRAIN);
  LL_GPIO_SetPinPull(BSP_I2C_DATA_GPIO_PORT, BSP_I2C_DATA_PIN, BSP_I2C_DATA_GPIO_PULL);
  BSP_I2C_DATA_GPIO_AF();
 
  BSP_I2C_CLK_GPIO_CLK_ENABLE();
  LL_GPIO_SetPinMode(BSP_I2C_CLK_GPIO_PORT, BSP_I2C_CLK_PIN, LL_GPIO_MODE_ALTERNATE);
  LL_GPIO_SetPinSpeed(BSP_I2C_CLK_GPIO_PORT, BSP_I2C_CLK_PIN, LL_GPIO_SPEED_FREQ_HIGH);
  LL_GPIO_SetPinOutputType(BSP_I2C_CLK_GPIO_PORT, BSP_I2C_CLK_PIN, LL_GPIO_OUTPUT_OPENDRAIN);
  LL_GPIO_SetPinPull(BSP_I2C_CLK_GPIO_PORT, BSP_I2C_CLK_PIN, BSP_I2C_CLK_GPIO_PULL);
  BSP_I2C_CLK_GPIO_AF();
 
  /* Initialize the I2C clock */
  BSP_I2C_CLK_ENABLE();
 
  LL_I2C_Disable(BSP_I2C);
  
  /* Configure the SDA setup, hold time and the SCL high, low period
   * For Fast-mode 400 kHz, PRESC | 0h | SCLDEL | SDADEL | SCLH | SCLL
   *                          1h  | 0h |    3h  |   2h   |  03h |  09h
   */
  __IO uint32_t timing = __LL_I2C_CONVERT_TIMINGS(0x03, 0x04, 0x02, 0xF, 0x13);
  printf("timing in BSP_I2C_Init: %#x, \r\n", timing);
  LL_I2C_SetTiming(BSP_I2C, timing);
//  LL_I2C_SetTiming(BSP_I2C, 0x10320309);
//  LL_I2C_SetTiming(BSP_I2C, 0x00200204);
  
 
  /* Enable Clock stretching */
  LL_I2C_EnableClockStretching(BSP_I2C);
 
  /* Enable Peripheral in I2C mode */
  LL_I2C_SetMode(BSP_I2C, LL_I2C_MODE_I2C);
 
  /* Enable the I2C peripheral */
  LL_I2C_Enable(BSP_I2C);
 
  /* Enable I2C transfer complete/error interrupts:
   *  - Enable Receive Interrupt
   *  - Enable Not acknowledge received interrupt
   *  - Enable Error interrupts
   *  - Enable Stop interrupt
   */
//  LL_I2C_EnableIT_TX(BSP_I2C);
//  LL_I2C_EnableIT_RX(BSP_I2C);
//  LL_I2C_EnableIT_TC(BSP_I2C);
//  LL_I2C_EnableIT_NACK(BSP_I2C);
//  LL_I2C_EnableIT_ERR(BSP_I2C);
//  LL_I2C_EnableIT_STOP(BSP_I2C);
}

When I tried to use API, I can't get whoamI ID. The result is 0.

#ifdef TEST_INERTIAL_SENSOR
 
   
 
   /* Initialize the handle of the LPS22HH driver */
 
   inertialHandle.write_reg = BSP_I2C_Write;
 
   inertialHandle.read_reg = BSP_I2C_Read;
 
    
 
   /* Inizialize the I2C */
 
   BSP_I2C_Init();
 
   LL_mDelay(1000);
 
    
 
   /* Wait sensor boot time */
 
   LL_mDelay(BOOT_TIME);
 
   /* Check device ID */
 
   uint8_t result;
 
   asm330lhh_status_reg_t reg;
 
   result = asm330lhh_device_id_get(&inertialHandle, &whoamI);
 
   result = asm330lhh_status_reg_get(&inertialHandle,&reg);
 
   printf("whoamI: %d, \r\n", whoamI);
 
   printf("ID: %d, \r\n", ASM330LHH_ID);
 
   printf("result: %d, \r\n", result);

I don't know what's the problem. My guess is the set timing is wrong. Because I tried many times with different value.

MAnto.2 · ‎2023-01-22

I have a similar problem. I am using HAL libraries instead of LL. Whit SPI I was able to read WHO_AM_I and temperature but was unable to get accelerometer and gyro data.

EPeng.1 · ‎2023-01-28

Finally, I figured out where the problem is. I changed the codes: (in both BSP_I2C_Write and BSP_I2C_Read)

From:

LL_I2C_TransmitData8(BSP_I2C, (Reg | 0x80));

To:

LL_I2C_TransmitData8(BSP_I2C, Reg);

Here raised a new question: Why we sometimes need Reg | 0x80, sometimes not?