mirror of https://github.com/ArduPilot/ardupilot
448 lines
13 KiB
C++
448 lines
13 KiB
C++
/*
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* AP_OpticalFlow_ADNS3080.cpp - ADNS3080 OpticalFlow Library for
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* Ardupilot Mega
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* Code by Randy Mackay. DIYDrones.com
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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*/
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#include <AP_HAL.h>
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#include "AP_OpticalFlow_ADNS3080.h"
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extern const AP_HAL::HAL& hal;
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#define AP_SPI_TIMEOUT 1000
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union NumericIntType
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{
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int16_t intValue;
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uint16_t uintValue;
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uint8_t byteValue[2];
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};
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// Constructors ////////////////////////////////////////////////////////////////
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AP_OpticalFlow_ADNS3080::AP_OpticalFlow_ADNS3080(uint8_t reset_pin) :
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_reset_pin(reset_pin)
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{
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num_pixels = ADNS3080_PIXELS_X;
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field_of_view = AP_OPTICALFLOW_ADNS3080_08_FOV;
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scaler = AP_OPTICALFLOW_ADNS3080_SCALER;
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}
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// Public Methods //////////////////////////////////////////////////////////////
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// init - initialise sensor
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// assumes SPI bus has been initialised but will attempt to initialise
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// nonstandard SPI3 bus if required
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bool
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AP_OpticalFlow_ADNS3080::init()
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{
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int8_t retry = 0;
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bool retvalue = false;
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// suspend timer while we set-up SPI communication
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hal.scheduler->suspend_timer_procs();
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if( _reset_pin != 0)
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hal.gpio->pinMode(_reset_pin, GPIO_OUTPUT);
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// reset the device
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reset();
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// check 3 times for the sensor on standard SPI bus
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_spi = hal.spi->device(AP_HAL::SPIDevice_ADNS3080_SPI0);
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if (_spi == NULL) {
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retvalue = false; goto finish;
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}
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while( retvalue == false && retry < 3 ) {
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if( read_register(ADNS3080_PRODUCT_ID) == 0x17 ) {
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retvalue = true;
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goto finish;
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}
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retry++;
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}
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// if not found, check 3 times on SPI3
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_spi = hal.spi->device(AP_HAL::SPIDevice_ADNS3080_SPI3);
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if (_spi == NULL) {
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retvalue = false; goto finish;
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}
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retry = 0;
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while( retvalue == false && retry < 3 ) {
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if( read_register(ADNS3080_PRODUCT_ID) == 0x17 ) {
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retvalue = true;
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}
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retry++;
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}
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// If we fail to find on SPI3, no connection available.
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retvalue = false;
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_spi = NULL;
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finish:
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// if device is working register the global static read function to
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// be called at 1khz
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if( retvalue ) {
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hal.scheduler->register_timer_process( AP_OpticalFlow_ADNS3080::read );
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_spi_sem = _spi->get_semaphore();
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if (_spi_sem == NULL) {
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hal.scheduler->panic(PSTR("PANIC: Got SPI Driver, but did not "
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"get valid SPI semaphore in AP_Optflow_ADNS3080"));
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}
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}
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// resume timer
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hal.scheduler->resume_timer_procs();
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return retvalue;
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}
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// Read a register from the sensor
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uint8_t AP_OpticalFlow_ADNS3080::read_register(uint8_t address)
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{
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if (_spi == NULL) return 0;
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if (!_spi_sem->take_nonblocking()) {
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return 0;
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}
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_spi->cs_assert();
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// send the device the register you want to read:
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_spi->transfer(address);
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hal.scheduler->delay_microseconds(50);
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// send a value of 0 to read the first byte returned:
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uint8_t result = _spi->transfer(0x00);
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_spi->cs_release();
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_spi_sem->give();
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return result;
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}
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// write a value to one of the sensor's registers
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void AP_OpticalFlow_ADNS3080::write_register(uint8_t address, uint8_t value)
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{
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if (_spi == NULL) return;
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if (!_spi_sem->take_nonblocking()) {
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return;
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}
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_spi->cs_assert();
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// send register address
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_spi->transfer(address | 0x80 );
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hal.scheduler->delay_microseconds(50);
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// send data
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_spi->transfer(value);
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_spi->cs_release();
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_spi_sem->give();
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}
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// reset sensor by holding a pin high (or is it low?) for 10us.
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void
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AP_OpticalFlow_ADNS3080::reset()
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{
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// return immediately if the reset pin is not defined
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if( _reset_pin == 0)
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return;
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// reset sensor
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hal.gpio->write(_reset_pin, 1);
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hal.scheduler->delay_microseconds(10);
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// return sensor to normal
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hal.gpio->write(_reset_pin, 0);
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}
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// read latest values from sensor and fill in x,y and totals
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void
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AP_OpticalFlow_ADNS3080::update(uint32_t now)
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{
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uint8_t motion_reg;
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surface_quality = (uint16_t)read_register(ADNS3080_SQUAL);
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hal.scheduler->delay_microseconds(50);
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// check for movement, update x,y values
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motion_reg = read_register(ADNS3080_MOTION);
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// check if we've had an overflow
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_overflow = ((motion_reg & 0x10) != 0);
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if( (motion_reg & 0x80) != 0 ) {
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raw_dx = ((int8_t)read_register(ADNS3080_DELTA_X));
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hal.scheduler->delay_microseconds(50);
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raw_dy = ((int8_t)read_register(ADNS3080_DELTA_Y));
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_motion = true;
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}else{
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raw_dx = 0;
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raw_dy = 0;
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}
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last_update = hal.scheduler->millis();
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apply_orientation_matrix();
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}
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void
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AP_OpticalFlow_ADNS3080::disable_serial_pullup()
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{
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uint8_t regVal = read_register(ADNS3080_EXTENDED_CONFIG);
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regVal = (regVal | ADNS3080_SERIALNPU_OFF);
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hal.scheduler->delay_microseconds(50);
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write_register(ADNS3080_EXTENDED_CONFIG, regVal);
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}
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// get_led_always_on - returns true if LED is always on, false if only on
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// when required
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bool AP_OpticalFlow_ADNS3080::get_led_always_on()
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{
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return ( (read_register(ADNS3080_CONFIGURATION_BITS) & 0x40) > 0 );
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}
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// set_led_always_on - set parameter to true if you want LED always on,
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// otherwise false for only when required
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void AP_OpticalFlow_ADNS3080::set_led_always_on( bool alwaysOn )
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{
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uint8_t regVal = read_register(ADNS3080_CONFIGURATION_BITS);
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regVal = (regVal & 0xbf) | (alwaysOn << 6);
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hal.scheduler->delay_microseconds(50);
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write_register(ADNS3080_CONFIGURATION_BITS, regVal);
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}
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// returns resolution (either 400 or 1600 counts per inch)
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int16_t AP_OpticalFlow_ADNS3080::get_resolution()
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{
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if( (read_register(ADNS3080_CONFIGURATION_BITS) & 0x10) == 0 )
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return 400;
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else
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return 1600;
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}
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// set parameter to 400 or 1600 counts per inch
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void AP_OpticalFlow_ADNS3080::set_resolution(uint16_t resolution)
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{
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uint8_t regVal = read_register(ADNS3080_CONFIGURATION_BITS);
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if( resolution == ADNS3080_RESOLUTION_400 ) {
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regVal &= ~0x10;
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scaler = AP_OPTICALFLOW_ADNS3080_SCALER;
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}else if( resolution == ADNS3080_RESOLUTION_1600) {
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regVal |= 0x10;
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scaler = AP_OPTICALFLOW_ADNS3080_SCALER * 4;
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}
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hal.scheduler->delay_microseconds(50);
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write_register(ADNS3080_CONFIGURATION_BITS, regVal);
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// this will affect conversion factors so update them
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update_conversion_factors();
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}
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// get_frame_rate_auto - return whether frame rate is set to "auto" or manual
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bool AP_OpticalFlow_ADNS3080::get_frame_rate_auto()
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{
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uint8_t regVal = read_register(ADNS3080_EXTENDED_CONFIG);
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if( (regVal & 0x01) != 0 ) {
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return false;
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}else{
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return true;
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}
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}
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// set_frame_rate_auto - set frame rate to auto (true) or manual (false)
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void AP_OpticalFlow_ADNS3080::set_frame_rate_auto(bool auto_frame_rate)
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{
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uint8_t regVal = read_register(ADNS3080_EXTENDED_CONFIG);
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hal.scheduler->delay_microseconds(50);
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if( auto_frame_rate == true ) {
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// set specific frame period
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write_register(ADNS3080_FRAME_PERIOD_MAX_BOUND_LOWER,0xE0);
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hal.scheduler->delay_microseconds(50);
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write_register(ADNS3080_FRAME_PERIOD_MAX_BOUND_UPPER,0x1A);
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hal.scheduler->delay_microseconds(50);
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// decide what value to update in extended config
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regVal = (regVal & ~0x01);
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}else{
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// decide what value to update in extended config
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regVal = (regVal & ~0x01) | 0x01;
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}
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write_register(ADNS3080_EXTENDED_CONFIG, regVal);
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}
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// get frame period
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uint16_t AP_OpticalFlow_ADNS3080::get_frame_period()
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{
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NumericIntType aNum;
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aNum.byteValue[1] = read_register(ADNS3080_FRAME_PERIOD_UPPER);
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hal.scheduler->delay_microseconds(50);
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aNum.byteValue[0] = read_register(ADNS3080_FRAME_PERIOD_LOWER);
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return aNum.uintValue;
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}
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// set frame period
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void AP_OpticalFlow_ADNS3080::set_frame_period(uint16_t period)
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{
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NumericIntType aNum;
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aNum.uintValue = period;
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// set frame rate to manual
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set_frame_rate_auto(false);
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hal.scheduler->delay_microseconds(50);
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// set specific frame period
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write_register(ADNS3080_FRAME_PERIOD_MAX_BOUND_LOWER,aNum.byteValue[0]);
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hal.scheduler->delay_microseconds(50);
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write_register(ADNS3080_FRAME_PERIOD_MAX_BOUND_UPPER,aNum.byteValue[1]);
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}
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uint16_t AP_OpticalFlow_ADNS3080::get_frame_rate()
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{
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uint32_t clockSpeed = ADNS3080_CLOCK_SPEED;
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uint16_t rate = clockSpeed / get_frame_period();
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return rate;
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}
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void AP_OpticalFlow_ADNS3080::set_frame_rate(uint16_t rate)
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{
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uint32_t clockSpeed = ADNS3080_CLOCK_SPEED;
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uint16_t period = (uint16_t)(clockSpeed / (uint32_t)rate);
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set_frame_period(period);
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}
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// get_shutter_speed_auto - returns true if shutter speed is adjusted
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// automatically, false if manual
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bool AP_OpticalFlow_ADNS3080::get_shutter_speed_auto()
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{
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uint8_t regVal = read_register(ADNS3080_EXTENDED_CONFIG);
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if( (regVal & 0x02) > 0 ) {
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return false;
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}else{
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return true;
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}
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}
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// set_shutter_speed_auto - set shutter speed to auto (true), or manual (false)
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void AP_OpticalFlow_ADNS3080::set_shutter_speed_auto(bool auto_shutter_speed)
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{
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uint8_t regVal = read_register(ADNS3080_EXTENDED_CONFIG);
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hal.scheduler->delay_microseconds(50);
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if( auto_shutter_speed ) {
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// return shutter speed max to default
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write_register(ADNS3080_SHUTTER_MAX_BOUND_LOWER,0x8c);
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hal.scheduler->delay_microseconds(50);
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write_register(ADNS3080_SHUTTER_MAX_BOUND_UPPER,0x20);
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hal.scheduler->delay_microseconds(50);
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// determine value to put into extended config
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regVal &= ~0x02;
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}else{
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// determine value to put into extended config
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regVal |= 0x02;
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}
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write_register(ADNS3080_EXTENDED_CONFIG, regVal);
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hal.scheduler->delay_microseconds(50);
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}
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// get_shutter_speed_auto - returns true if shutter speed is adjusted
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// automatically, false if manual
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uint16_t AP_OpticalFlow_ADNS3080::get_shutter_speed()
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{
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NumericIntType aNum;
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aNum.byteValue[1] = read_register(ADNS3080_SHUTTER_UPPER);
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hal.scheduler->delay_microseconds(50);
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aNum.byteValue[0] = read_register(ADNS3080_SHUTTER_LOWER);
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return aNum.uintValue;
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}
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// set_shutter_speed_auto - set shutter speed to auto (true), or manual (false)
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void
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AP_OpticalFlow_ADNS3080::set_shutter_speed(uint16_t shutter_speed)
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{
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NumericIntType aNum;
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aNum.uintValue = shutter_speed;
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// set shutter speed to manual
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set_shutter_speed_auto(false);
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hal.scheduler->delay_microseconds(50);
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// set specific shutter speed
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write_register(ADNS3080_SHUTTER_MAX_BOUND_LOWER,aNum.byteValue[0]);
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hal.scheduler->delay_microseconds(50);
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write_register(ADNS3080_SHUTTER_MAX_BOUND_UPPER,aNum.byteValue[1]);
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hal.scheduler->delay_microseconds(50);
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// larger delay
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hal.scheduler->delay(50);
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// need to update frame period to cause shutter value to take effect
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aNum.byteValue[1] = read_register(ADNS3080_FRAME_PERIOD_UPPER);
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hal.scheduler->delay_microseconds(50);
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aNum.byteValue[0] = read_register(ADNS3080_FRAME_PERIOD_LOWER);
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hal.scheduler->delay_microseconds(50);
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write_register(ADNS3080_FRAME_PERIOD_MAX_BOUND_LOWER,aNum.byteValue[0]);
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hal.scheduler->delay_microseconds(50);
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write_register(ADNS3080_FRAME_PERIOD_MAX_BOUND_UPPER,aNum.byteValue[1]);
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hal.scheduler->delay_microseconds(50);
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}
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// clear_motion - will cause the Delta_X, Delta_Y, and internal motion
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// registers to be cleared
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void AP_OpticalFlow_ADNS3080::clear_motion()
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{
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// writing anything to this register will clear the sensor's motion
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// registers
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write_register(ADNS3080_MOTION_CLEAR,0xFF);
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x = 0;
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y = 0;
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dx = 0;
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dy = 0;
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_motion = false;
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}
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// get_pixel_data - captures an image from the sensor and stores it to the
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// pixe_data array
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void AP_OpticalFlow_ADNS3080::print_pixel_data()
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{
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int16_t i,j;
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bool isFirstPixel = true;
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uint8_t regValue;
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uint8_t pixelValue;
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// write to frame capture register to force capture of frame
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write_register(ADNS3080_FRAME_CAPTURE,0x83);
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// wait 3 frame periods + 10 nanoseconds for frame to be captured
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// min frame speed is 2000 frames/second so 1 frame = 500 nano seconds.
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// so 500 x 3 + 10 = 1510
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hal.scheduler->delay_microseconds(1510);
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// display the pixel data
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for( i=0; i<ADNS3080_PIXELS_Y; i++ ) {
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for( j=0; j<ADNS3080_PIXELS_X; j++ ) {
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regValue = read_register(ADNS3080_FRAME_CAPTURE);
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if( isFirstPixel && (regValue & 0x40) == 0 ) {
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hal.console->println_P(
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PSTR("Optflow: failed to find first pixel"));
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}
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isFirstPixel = false;
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pixelValue = ( regValue << 2 );
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hal.console->print(pixelValue,DEC);
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if( j!= ADNS3080_PIXELS_X-1 )
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hal.console->print_P(PSTR(","));
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hal.scheduler->delay_microseconds(50);
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}
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hal.console->println();
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}
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// hardware reset to restore sensor to normal operation
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reset();
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}
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