Hello, I am using the BMP388 sensor. The temperature value is OK. , but pressure value is wrong, it is below 900 hPa.I use the BMP3-Sensor-API V2.0.1 code on the gitub website. https://github.com/BoschSensortec/BMP3-Sensor-API The experimental results are as follows. temperature : 2731.000000 pressure : 7831998.000000 The spi communication is working well as the chip ID number is correctly get. My code is below , where is wrong? /* SPI2 init function */ void MX_SPI2_Init(void) { hspi2.Instance = SPI2; hspi2.Init.Mode = SPI_MODE_MASTER; hspi2.Init.Direction = SPI_DIRECTION_2LINES; hspi2.Init.DataSize = SPI_DATASIZE_8BIT; hspi2.Init.CLKPolarity = SPI_POLARITY_LOW; hspi2.Init.CLKPhase = SPI_PHASE_1EDGE; hspi2.Init.NSS = SPI_NSS_SOFT; hspi2.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256; hspi2.Init.FirstBit = SPI_FIRSTBIT_MSB; hspi2.Init.TIMode = SPI_TIMODE_DISABLE; hspi2.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE; hspi2.Init.CRCPolynomial = 0x0; hspi2.Init.NSSPMode = SPI_NSS_PULSE_ENABLE; hspi2.Init.NSSPolarity = SPI_NSS_POLARITY_LOW; hspi2.Init.FifoThreshold = SPI_FIFO_THRESHOLD_01DATA; hspi2.Init.TxCRCInitializationPattern = SPI_CRC_INITIALIZATION_ALL_ZERO_PATTERN; hspi2.Init.RxCRCInitializationPattern = SPI_CRC_INITIALIZATION_ALL_ZERO_PATTERN; hspi2.Init.MasterSSIdleness = SPI_MASTER_SS_IDLENESS_00CYCLE; hspi2.Init.MasterInterDataIdleness = SPI_MASTER_INTERDATA_IDLENESS_00CYCLE; hspi2.Init.MasterReceiverAutoSusp = SPI_MASTER_RX_AUTOSUSP_DISABLE; hspi2.Init.MasterKeepIOState = SPI_MASTER_KEEP_IO_STATE_DISABLE; hspi2.Init.IOSwap = SPI_IO_SWAP_DISABLE; if (HAL_SPI_Init(&hspi2) != HAL_OK) { Error_Handler(); } } uint8_t stm32_spi_writeBMP388(uint8_t reg_addr, const uint8_t *reg_data, uint32_t length, void *intf_ptr) { reg_addr &= 0x7f; HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12, GPIO_PIN_RESET); HAL_SPI_Transmit(&hspi2, ®_addr, 1, 50); while(HAL_SPI_GetState(&hspi2) == HAL_SPI_STATE_BUSY); HAL_SPI_Transmit(&hspi2, (uint8_t *)reg_data, length, 50); while(HAL_SPI_GetState(&hspi2) == HAL_SPI_STATE_BUSY); HAL_SPI_Transmit(&hspi2, ®_addr, 1, 50); while(HAL_SPI_GetState(&hspi2) == HAL_SPI_STATE_BUSY); HAL_SPI_Transmit(&hspi2, (uint8_t *)reg_data, length, 50); while(HAL_SPI_GetState(&hspi2) == HAL_SPI_STATE_BUSY); HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12, GPIO_PIN_SET); return 0; } uint8_t stm32_spi_readBMP388(uint8_t reg_addr, const uint8_t *reg_data, uint32_t length, void *intf_ptr) { reg_addr |= 0x80; HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12, GPIO_PIN_RESET); delay_ms(5); // HAL_SPI_TransmitReceive(&hspi2, ®_addr, (uint8_t*)reg_data, length, 0xffff); HAL_SPI_Transmit(&hspi2, ®_addr, 1, 50); while(HAL_SPI_GetState(&hspi2) == HAL_SPI_STATE_BUSY); HAL_SPI_Receive(&hspi2, (uint8_t *)reg_data, length, 50); HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12, GPIO_PIN_SET); return 0; } int8_t user_spi_readBMP388(uint8_t reg_addr, uint8_t *reg_data, uint32_t length, void *intf_ptr) { stm32_spi_readBMP388(reg_addr, reg_data, length, intf_ptr); return 0; } int8_t user_spi_writeBMP388(uint8_t reg_addr, const uint8_t *reg_data, uint32_t length, void *intf_ptr) { stm32_spi_writeBMP388(reg_addr, reg_data, length, intf_ptr); return 0; } void user_delayBMP388(uint32_t period_us, void *intf_ptr) { delay_us(period_us); } void BMP388Init(void) { bmp388.intf = BMP3_SPI_INTF; bmp388.write = user_spi_writeBMP388; bmp388.read = user_spi_readBMP388; bmp388.delay_us = user_delayBMP388; bmp388.intf_ptr = &bmp388_addr; bmp388.dummy_byte = 1; }
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