VL53L0X World smallest Time-of-Flight (ToF) ranging sensor
Dependencies: X_NUCLEO_COMMON ST_INTERFACES
Dependents: HelloWorld_ST_Sensors mbed-os-mqtt-client Multi_VL53L0X DISCO-IOT01_HomeEnv ... more
Fork of VL53L0X by
vl53L1x_I2c.h
- Committer:
- JerrySzczurak
- Date:
- 2019-01-28
- Revision:
- 5:f16727052990
File content as of revision 5:f16727052990:
/* Define to prevent from recursive inclusion --------------------------------*/ #ifndef __DEV_53L1X_I2C_H #define __DEV_53L1X_I2C_H /* Includes ------------------------------------------------------------------*/ #include "mbed.h" #include "pinmap.h" //Class replacing DevI2C class as it was not implementing a 16bit address registers class vl53L1X_DevI2C : public I2C { public: /** Create a DevI2C Master interface, connected to the specified pins * * @param sda I2C data line pin * @param scl I2C clock line pin */ vl53L1X_DevI2C(PinName sda, PinName scl) : I2C(sda, scl) {} /** * @brief Writes a buffer towards the I2C peripheral device. * @param pBuffer pointer to the byte-array data to send * @param DeviceAddr specifies the peripheral device slave address. * @param RegisterAddr specifies the internal address register * where to start writing to (must be correctly masked). * @param NumByteToWrite number of bytes to be written. * @retval 0 if ok, * @retval -1 if an I2C error has occured, or * @retval -2 on temporary buffer overflow (i.e. NumByteToWrite was too high) * @note On some devices if NumByteToWrite is greater * than one, the RegisterAddr must be masked correctly! */ int v53l1x_i2c_write(uint8_t* pBuffer, uint8_t DeviceAddr, uint16_t RegisterAddr, uint16_t NumByteToWrite) { int ret; uint8_t tmp[TEMP_BUF_SIZE]; if(NumByteToWrite >= TEMP_BUF_SIZE) return -2; /* First, send device address. Then, send data and STOP condition */ tmp[0] = RegisterAddr >> 8; tmp[1] = RegisterAddr & 0x0FF; memcpy(tmp+2, pBuffer, NumByteToWrite); ret = write(DeviceAddr, (const char*)tmp, NumByteToWrite+2, false); if(ret) return -1; return 0; } /** * @brief Reads a buffer from the I2C peripheral device. * @param pBuffer pointer to the byte-array to read data in to * @param DeviceAddr specifies the peripheral device slave address. * @param RegisterAddr specifies the internal address register * where to start reading from (must be correctly masked). * @param NumByteToRead number of bytes to be read. * @retval 0 if ok, * @retval -1 if an I2C error has occured * @note On some devices if NumByteToWrite is greater * than one, the RegisterAddr must be masked correctly! */ int v53l1x_i2c_read(uint8_t* pBuffer, uint8_t DeviceAddr, uint16_t RegisterAddr, uint16_t NumByteToRead) { int ret; uint8_t ExpanderData[2]; ExpanderData[0] = RegisterAddr >> 8; ExpanderData[1] = RegisterAddr & 0x0FF; /* Send device address, with no STOP condition */ ret = write(DeviceAddr, (const char*)ExpanderData, 2, true); if(!ret) { /* Read data, with STOP condition */ ret = read(DeviceAddr, (char*)pBuffer, NumByteToRead, false); } if(ret) return -1; return 0; } private: static const unsigned int TEMP_BUF_SIZE = 32; }; #endif /* __DEV_53L1X_I2C_H */