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
Diff: commHeaders/I2CcommFunctions.h
- Revision:
- 0:a051df82fcdf
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/commHeaders/I2CcommFunctions.h Mon Jun 25 21:14:10 2018 +0000 @@ -0,0 +1,102 @@ +#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; +}