Skip to main content
SARTHAK KELAPURE
SARTHAK KELAPURE
Associate III
February 12, 2018
Question

LIS3DH library

  • February 12, 2018
  • 3 replies
  • 2534 views
Posted on February 12, 2018 at 11:18

Hello everyone,

Can someone help me with LIS3DH accelerometer library.

Thank you.

    This topic has been closed for replies.

    3 replies

    Bogdan Golab
    Bogdan Golab
    Lead
    February 12, 2018
    Posted on February 12, 2018 at 11:28

    I use the LIS33DE but this one seems to work the same way:

    -set right bits here: CTRL_REG1 (20h) - mode, enable x, y, z

    -then you can read the STATUS_REG (27h) register and see if the ZYXDA bit is set

    -then read the particular OUTxxxx register

    I assumed that you can handle the I2C/SPI bus correctly. I use SPI.

    Details:

    http://www.st.com/content/ccc/resource/technical/document/datasheet/3c/ae/50/85/d6/b1/46/fe/CD00274221.pdf/files/CD00274221.pdf/jcr:content/translations/en.CD00274221.pdf

     
    ab val
    ab val
    Associate III
    February 12, 2018
    Posted on February 12, 2018 at 16:03

    Here is the library I use:

    https://github.com/s54mtb/LEDS/blob/master/Src/lis3dh_driver.c

     
    Bogdan Golab
    Bogdan Golab
    Lead
    February 12, 2018
    Posted on February 12, 2018 at 17:18

     ,

     ,

    I use simplified code:

    ♯ define LIS35_WRITE 0

     ,

    ♯ define LIS35_READ  , ,  ,0x80

     ,

    ♯ define LIS35_ADDR_NO_INC 0

     ,

    ♯ define LIS35_ADDR_INC 0x40

    ♯ define LIS35_REG_OUTX  , ,  ,0x29

     ,

    ♯ define LIS35_REG_OUTY , ,  ,0x2B

     ,

    ♯ define LIS35_REG_OUTZ , ,  ,0x2D

    ♯ define LIS35_REG_CR1 0x20

     ,

    ♯ define LIS35_REG_CR1_XEN 0x1

     ,

    ♯ define LIS35_REG_CR1_YEN 0x2

     ,

    ♯ define LIS35_REG_CR1_ZEN 0x4

     ,

    ♯ define LIS35_REG_CR1_DR_400HZ 0x80

     ,

    ♯ define LIS35_REG_CR1_ACTIVE 0x40

     ,

    ♯ define LIS35_REG_CR1_FULL_SCALE 0x20

    ♯ define , ,  ,OUTX , ,  ,0X29

     ,

    ♯ define , ,  ,OUTY , ,  ,0X2B

     ,

    ♯ define , ,  ,OUTZ , ,  ,0X2D

     ,

     ,

     ,

    ♯ define , , , , ChipSelectLOW() , , , , HAL_GPIO_WritePin(LIS35DE_CS_GPIO_Port, LIS35DE_CS_Pin, GPIO_PIN_RESET),

     ,

    ♯ define , , , , ChipSelectHigh() , , , HAL_GPIO_WritePin(LIS35DE_CS_GPIO_Port, LIS35DE_CS_Pin, GPIO_PIN_SET),

    uint8_t memsc, memsr, memss, memsX, memsY, memsZ,

    uint8_t LIS35DE_ReadRegister(uint8_t addr)

     ,

    {

     ,

     , ,  ,uint8_t address = LIS35_READ | LIS35_ADDR_NO_INC | addr,

     ,

     , ,  ,uint8_t data,

     ,

     , ,  ,

     ,

     , ,  ,ChipSelectLOW(),

     ,

     , ,  ,HAL_SPI_Transmit(&,hspi1, &,address, 1, 1000),

     ,

     , ,  ,HAL_SPI_Receive(&,hspi1, &,data, 1, 1000),

     ,

     , ,  ,ChipSelectHigh(),

     ,

     , ,  ,return data,

     ,

    }

     ,

     ,

     ,

    void LIS35DE_WriteRegister(uint8_t addr, uint8_t data)

     ,

    {

     ,

     , ,  ,ChipSelectLOW(),

     ,

     , ,  ,uint8_t address = LIS35_WRITE | LIS35_ADDR_NO_INC | addr,

     ,

     , ,  ,HAL_SPI_Transmit(&,hspi1, &,address, 1, 1000),

     ,

     , ,  ,HAL_SPI_Transmit(&,hspi1, &,data, 1, 1000),

     ,

     , ,  ,ChipSelectHigh(),

     ,

    }

    void main(void)

     ,

    { , ,  ,

     ,

     , ,  ,// MEMs init , ,  , , ,  ,

     ,

     , ,  ,memsc=LIS35_REG_CR1_XEN | LIS35_REG_CR1_YEN | LIS35_REG_CR1_ZEN | LIS35_REG_CR1_ACTIVE,

     ,

     , ,  ,LIS35DE_WriteRegister(LIS35_REG_CR1, memsc), , ,  ,// Active mode, Enable X, Y, Z

     ,

     , ,  ,memsr = LIS35DE_ReadRegister(CTRL_REG1), , ,  ,// to verify if the MEMs was configured , ,  , , ,  ,

     ,

     , ,  ,

     ,

     , ,  ,MEMS reading

     ,

     , ,  ,// memss = LIS35DE_ReadRegister(STATUS_REG), , ,  ,// you can check if the data is ready

     ,

     , ,  ,

     ,

     , ,  ,memsX = LIS35DE_ReadRegister(LIS35_REG_OUTX),

     ,

     , ,  ,memsY = LIS35DE_ReadRegister(LIS35_REG_OUTY),

     ,

     , ,  ,memsZ = LIS35DE_ReadRegister(LIS35_REG_OUTZ),

     ,

    }
    Terms & ConditionsAccessibility statement