Reference firmware for PixArt's ADBM-A350 sensor and evaluation board. "Hello World" and "Library" contain the exact same files. Please import just one of the two into your mBed compiler as a new program and not as a library.
Welcome to the code repository for PixArt's ADBM-A350 sensor and evaluation board.
For general information about this product, please visit this product's components page here:
https://os.mbed.com/components/ADBM-A350-Finger-Navigation-Optical-Sens/
For guides and tips on how to setup and evaluate the ADBM-A350 sensor with the Nordic nRF52-DK microcontroller using this reference code, please visit this guide:
https://os.mbed.com/teams/PixArt/code/ADBM-A350_referenceCode/wiki/Guide-for-nRF52-DK-Platform
For guides and tips on how to setup and evaluate the ADBM-A350 sensor with any mBed-supported microcontroller using this reference code, please visit this guide:
https://os.mbed.com/teams/PixArt/code/ADBM-A350_referenceCode/wiki/Guide-for-Any-Platform
commHeaders/I2CcommFunctions.h
- Committer:
- PixArtVY
- Date:
- 2018-10-30
- Revision:
- 1:67d6484416a6
- Parent:
- 0:a051df82fcdf
File content as of revision 1:67d6484416a6:
#define I2Cmode //Used to check if the sensor is in I2C mode or SPI mode. #define I2C_Slave_ID 0x57 //Slave ID is 0x57 only if p22 and p23 are both HIGH. //========================================================================= //Communication pinouts for serial COM port, I2C, and interrupts //========================================================================= static Serial pc(USBTX, USBRX); //PC comm static I2C i2c(p26, p27); //SDA, SCL static DigitalOut cs(p22); //CS pin for selecting slave address static DigitalOut MOSI(p23); //MOSI pin for selecting slave address static DigitalOut shutdown(p20); //Shutdown pin static DigitalOut IO_sel(p19); //IO interface selection pin (I2C and SPI) //========================================================================= //Variables and arrays used for communications and data storage //========================================================================= int8_t deltaX, deltaY; //Stores the value of one individual motion report. int totalX, totalY = 0; //Stores the total deltaX and deltaY moved during runtime. //========================================================================= //Functions used to communicate with the sensor and grab/print data //========================================================================= uint8_t readRegister(uint8_t addr); //This function takes an 8-bit address in the form 0x00 and returns an 8-bit value in the form 0x00. void writeRegister(uint8_t addr, uint8_t data); //This function takes an 8-bit address and 8-bit data. Writes the given data to the given address. void load(const uint8_t array[][2], uint8_t arraySize); //Takes an array of registers/data (found in registerArrays.h) and their size and writes in all the values. void grabData(void); //Grabs the deltaX and deltaY information from the proper registers and formats it into the proper format. void printData(void); //Prints the data out to a serial terminal. //========================================================================= //Functions definitions //========================================================================= uint8_t readRegister(uint8_t addr) { uint8_t data; i2c.write((I2C_Slave_ID << 1), (const char*)&addr, 1, 0); //Send the address to the chip i2c.read((I2C_Slave_ID << 1), (char*)&data, 1, 0); //Send the memory address where you want to store the read data return(data); } //========================================================================= void writeRegister(uint8_t addr, uint8_t data) { char data_write[2]; //Create an array to store the address/data to pass them at the same time. data_write[0] = addr; //Store the address in the first byte data_write[1] = data; //Store the data in the second byte i2c.write((I2C_Slave_ID << 1), data_write, 2, 0); //Send both over at once pc.printf("R:%2X, D:%2X\n\r", addr, readRegister(addr)); //Uncomment this line for debugging. Prints every register write operation. } //========================================================================= void load(const uint8_t array[][2], uint8_t arraySize) { for(uint8_t q = 0; q < arraySize; q++) { writeRegister(array[q][0], array[q][1]); //Writes the given array of registers/data. } } //========================================================================= void grabData(void) { deltaX = readRegister(0x03); //Grabs data from the proper registers. deltaY = readRegister(0x04); writeRegister(0x02, 0x00); //Clear EVENT and motion registers. } //========================================================================= void printData(void) { if((deltaX != 0) || (deltaY != 0)) //If there is deltaX or deltaY movement, print the data. { totalX += deltaX; totalY += deltaY; pc.printf("deltaX: %d\t\t\tdeltaY: %d\n\r", deltaX, deltaY); //Prints each individual count of deltaX and deltaY. pc.printf("X-axis Counts: %d\t\tY-axis Counts: %d\n\r", totalX, totalY); //Prints the total movement made during runtime. } deltaX = 0; //Resets deltaX and Y values to zero, otherwise previous data is stored until overwritten. deltaY = 0; }