Initial release.
Dependencies: X_NUCLEO_COMMON ST_INTERFACES
Dependents: X_NUCLEO_53L1A1_mbed X_NUCLEO_53L1A1_mbed VL53L1X_Ranging_With_Standalone_Satellite_MbedOS X_NUCLEO_53L1A1
VL53L1X_I2C.h
- Committer:
- johnAlexander
- Date:
- 2019-07-24
- Revision:
- 7:6d3ab15363a2
File content as of revision 7:6d3ab15363a2:
/* 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 */