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About XudanMorris-Wei
since
03-16-2020
09-20-2020
XudanMorris-Wei
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09-20-2020
08:48 PM
Here is the print out of note 2 metioned in the post, as only 3 pictures are allowed in one post
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09-20-2020
08:47 PM
Hello there: I want to enable anymotion feature on BMI270 but not map to any physical interrupt pins. MCU checks the status by reading INT_STATUS0 every 1 second through SPI. I am expecting bit 6 of INT_STATUS set flag as I move the sensor, but the output is alwasy 0. Below is how I do it. Procedure: Initialize BMI270 as performance opt mode with ODR as 25/8, and Power save mode; Enable INT_LATCH by setting it to 1; Set FEAT_PAGE to 1; Set ANYMOTION1 and ANYMOTION2 as 0xE005, 0Xb8AA (output to bit6, 5 samples, x, y, z enabled, 83mg ) Write whole page values to FEATURES[0-15] Disable acc, gyro and temperature until main function. In the main function enable acc, gyro and temperature and read INT_STATUS0 I am pasting the code screeshot of each steps Step 1: Initialization Step 6 see the last line of code in the step 1 picture. Step 7 read and display INT_STATUS Couple note: BMI270 is configured correct and config file is uploaded correctly. Acc and gyro is operation correctly. I can get the data out; During initialization, I read the Feature 0 -15 and then write the value to them then read values again. However, the read after register writing dosent give correct values, shown as below 1, 2, 3 and red highlight. Appriciate your help. Thanks in advance.
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09-20-2020
09:18 AM
Hi, I ran into the same issue. Were you able to find the root cause? Thanks
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03-16-2020
10:44 PM
Hello everyone: New to the community. Running into an interesting behavior with BMI270, wondering if any one has an answer there. Using BMI270, able to read the CHIP-ID correctly. After soft-reset and wait for 1000ms, reading the value of registers, PWR_CONF and PWR_CTRL, both comes back as 0x00, while it is supporsed to be 0x03 for PWR_CONF. Intersting is if read PWR_CTRL first then read PWR_CONF, it comes back as0x03 and 0x00. Any idea why? Attaching some source code here for reference. void device_imu_bmi270_reset() { uint8_t value = 0xFF; mcu_spi_io_pkg bmi270_spi_io_pkg; bmi270_spi_io_pkg.bytesToSendReceive = 2; bmi270_spi_io_pkg.p_tx_buffer = tx_buffer; bmi270_spi_io_pkg.p_rx_buffer = rx_buffer; bmi270_spi_io_pkg.devnum = MCU_SPI_DEV_BMI270; tx_buffer[0] = BMI270_COMMAND_WRITE | BMI270_REG_CMD; tx_buffer[1] = BMI270_COMMAND_RESET; mcu_spi_io(&bmi270_spi_io_pkg); printLog("BMI270 resetting\r\n"); sl_sleeptimer_delay_millisecond(1000); //device_imu_bmi270_read_register_onebyte(BMI270_REG_PWRCONF); //0x03 device_imu_bmi270_read_register_onebyte(BMI270_REG_PWRCTRL); //0x00 device_imu_bmi270_read_register_onebyte(BMI270_REG_PWRCONF); //0x03 //simply switch these two above lines, the output gets correct } The read function is defined as uint8_t device_imu_bmi270_read_register_onebyte(uint8_t addr) { mcu_spi_io_pkg bmi270_spi_io_pkg; bmi270_spi_io_pkg.bytesToSendReceive = 3; bmi270_spi_io_pkg.p_tx_buffer = tx_buffer; bmi270_spi_io_pkg.p_rx_buffer = rx_buffer; bmi270_spi_io_pkg.devnum = MCU_SPI_DEV_BMI270; tx_buffer[0] = BMI270_COMMAND_READ | addr; tx_buffer[1] = BMI270_DUMMY_DATA; // 16 bit protocol. dummy byte needed before read actual data tx_buffer[2] = BMI270_DUMMY_DATA; // dummy mcu_spi_io(&bmi270_spi_io_pkg); // send data to BMI270 printLog("Read byte is 0x%02x\r\n",rx_buffer[2]); return rx_buffer[2]; } Thanks for your inputs
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