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SPI read Pixi Cam V1
Diff: TPixy.h
- Revision:
- 5:d109b094d4bb
- Parent:
- 4:478d4d9193a1
--- a/TPixy.h Mon Aug 23 11:26:37 2021 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,304 +0,0 @@ -// -// begin license header -// -// This file is part of Pixy CMUcam5 or "Pixy" for short -// -// All Pixy source code is provided under the terms of the -// GNU General Public License v2 (http://www.gnu.org/licenses/gpl-2.0.html). -// Those wishing to use Pixy source code, software and/or -// technologies under different licensing terms should contact us at -// cmucam@cs.cmu.edu. Such licensing terms are available for -// all portions of the Pixy codebase presented here. -// -// end license header -// -// This file is for defining the Block struct and the Pixy template class. -// (TPixy). TPixy takes a communication link as a template parameter so that -// all communication modes (SPI, I2C and UART) can share the same code. -// - -#ifndef _TPIXY_H -#define _TPIXY_H - -#include "mbed.h" -#include "TPixyInterface.h" - -// Communication/misc parameters -#define PIXY_INITIAL_ARRAYSIZE 30 -#define PIXY_MAXIMUM_ARRAYSIZE 130 -#define PIXY_START_WORD 0xaa55 -#define PIXY_START_WORD_CC 0xaa56 -#define PIXY_START_WORDX 0x55aa -#define PIXY_MAX_SIGNATURE 7 -#define PIXY_DEFAULT_ARGVAL 0xffff - -// Pixy x-y position values -#define PIXY_MIN_X 0L -#define PIXY_MAX_X 319L -#define PIXY_MIN_Y 0L -#define PIXY_MAX_Y 199L - -// RC-servo values -#define PIXY_RCS_MIN_POS 0L -#define PIXY_RCS_MAX_POS 1000L -#define PIXY_RCS_CENTER_POS ((PIXY_RCS_MAX_POS-PIXY_RCS_MIN_POS)/2) - -enum BlockType { - NORMAL_BLOCK, - CC_BLOCK -}; - -/** A structure for containing Block data - * signature the signature of the block - * x the x position of the block on the screen - * y the y position of the block on the screen - * width the width of the block on the screen - * height the height of the block on the screen - * angle the angle of the block - */ -struct Block { - uint16_t signature; - uint16_t x; - uint16_t y; - uint16_t width; - uint16_t height; - uint16_t angle; -}; - -/** The superclass handler for the Pixy camera from a given connection handler (SPI, I2C, etc) - * Used for instantiating a Pixy object that interfaces via an abtritrary connection handler - */ -template <class TPixyInterface> class TPixy -{ -public: - BufferedSerial* serial; - Block *blocks; - - /** Creates a TPixy object with a given connection handler - * @param type the pointer to the interface connection handler - * @param serialOut the optional serial output pointer to print out Pixy camera data - * @param arg an optional integer argument used for custom implementations of the Pixy library - */ - TPixy(TPixyInterface* type, BufferedSerial* serialOut = NULL, uint16_t arg = PIXY_DEFAULT_ARGVAL); - ~TPixy(); - - /** Prints the given Block out to the given serial port - * @param &block the Block to print - */ - void printBlock(Block &block); - /** Returns the number of Blocks found in the current view and updates all Blocks' info - * @param maxBlocks the maximum number of Blocks to search for - * @return the number of Blocks found - */ - uint16_t getBlocks(uint16_t maxBlocks = 1000); - /** Sets the PWM value of the Pixy servos - * @param s0 the value of the left servo - * @param s1 the value of the right servo - * @return the interface return value for sending the servo command - */ - int8_t setServos(uint16_t s0, uint16_t s1); - /** Sets the brightness of the Pixy RGB LED - * @param brightness the brightness of the LED - * @return the interface return value for sending the brightness command - */ - int8_t setBrightness(uint8_t brightness); - /** Sets the color of the Pixy RGB LED - * @param r the red color value - * @param g the green color value - * @param b the blue color value - */ - int8_t setLED(uint8_t r, uint8_t g, uint8_t b); - /** Initializes the Pixy - */ - void init(); - -private: - TPixyInterface* link; - BlockType blockType; - /** Returns if the Pixy is ready to receive/send a message - */ - bool getStart(); - /** Resizes the block array to add an additional block - */ - void resize(); - bool skipStart; - uint16_t blockCount; - uint16_t blockArraySize; -}; - -template <class TPixyInterface> void TPixy<TPixyInterface>::init() -{ - link->init(); -} - - -template <class TPixyInterface> TPixy<TPixyInterface>::TPixy(TPixyInterface* type, BufferedSerial* serialOut, uint16_t arg) : serial(serialOut), link(type) -{ - skipStart = false; - blockCount = 0; - blockArraySize = PIXY_INITIAL_ARRAYSIZE; - blocks = (Block *)malloc(sizeof(Block)*blockArraySize); - link->setArg(arg); -} - -template <class TPixyInterface> void TPixy<TPixyInterface>::printBlock(Block &block) -{ - int i, j; - char sig[6], d; - bool flag; - if (block.signature > PIXY_MAX_SIGNATURE) { // color code! (CC) - // convert signature number to an octal string - for (i = 12, j = 0, flag = false; i >= 0; i -= 3) { - d = (block.signature >> i) & 0x07; - if (d > 0 && !flag) { - flag = true; - } - if (flag) { - sig[j++] = d + '0'; - } - } - sig[j] = '\0'; - { - printf("CC block! sig: %s (%d decimal) x: %d y: %d width: %d height: %d angle %d\n", sig, block.signature, block.x, block.y, block.width, block.height, block.angle); - } - } //else {}// regular block. Note, angle is always zero, so no need to print - printf("sig: %d x: %d y: %d width: %d height: %d\n", block.signature, block.x, block.y, block.width, block.height); -} - -template <class TPixyInterface> TPixy<TPixyInterface>::~TPixy() -{ - free(blocks); -} - -template <class TPixyInterface> bool TPixy<TPixyInterface>::getStart() -{ - uint16_t w, lastw; - lastw = 0xffff; - while(true) { - w = link->getWord(); - if (w == 0 && lastw == 0) { - ThisThread::sleep_for(10); - return false; - } else if (w == PIXY_START_WORD && lastw == PIXY_START_WORD) { - blockType = NORMAL_BLOCK; - return true; - } else if (w == PIXY_START_WORD_CC && lastw == PIXY_START_WORD) { - blockType = CC_BLOCK; - return true; - } else if (w == PIXY_START_WORDX) { - if (serial != NULL) { - printf("reorder"); - } - link->getByte(); // resync - } - lastw = w; - } -} - -template <class TPixyInterface> void TPixy<TPixyInterface>::resize() -{ - blockArraySize += PIXY_INITIAL_ARRAYSIZE; - blocks = (Block *)realloc(blocks, sizeof(Block)*blockArraySize); -} - -template <class TPixyInterface> uint16_t TPixy<TPixyInterface>::getBlocks(uint16_t maxBlocks) -{ - uint8_t i; - uint16_t w, checksum, sum; - Block *block; - - if (!skipStart) { - if (getStart() == false) { - printf("- 0 -\r\n"); - return 0; - } - } else { - skipStart = false; - } - for(blockCount = 0; blockCount < maxBlocks && blockCount < PIXY_MAXIMUM_ARRAYSIZE;) - { - checksum = link->getWord(); - if (checksum == PIXY_START_WORD) { // we've reached the beginning of the next frame - skipStart = true; - blockType = NORMAL_BLOCK; - if(1) { - printf("skip"); - } - printf("- 1 -\r\n"); - return blockCount; - } else if (checksum == PIXY_START_WORD_CC) { - skipStart = true; - blockType = CC_BLOCK; - printf("- 2 -\r\n"); - return blockCount; - } else if (checksum == 0) { - printf("- 3 -\r\n"); - return blockCount; - } - if (blockCount > blockArraySize) { - resize(); - } - block = blocks + blockCount; - - for (i = 0, sum = 0; i < sizeof(Block)/sizeof(uint16_t); i++) { - if (blockType == NORMAL_BLOCK && i >= 5) { // skip - block->angle = 0; - break; - } - w = link->getWord(); - sum += w; - *((uint16_t *)block + i) = w; - } - - if (checksum == sum) { - blockCount++; - } else { - w = link->getWord(); - if (serial != NULL) { - printf("cs error"); - } - } - if (w == PIXY_START_WORD) { - blockType = NORMAL_BLOCK; - } else if (w == PIXY_START_WORD_CC) { - blockType = CC_BLOCK; - } else { - printf("- 4 -\r\n"); - return blockCount; - } - } - printf("- 5 -\r\n"); - return blockCount; -} - -template <class TPixyInterface> int8_t TPixy<TPixyInterface>::setServos(uint16_t s0, uint16_t s1) -{ - uint8_t outBuf[6]; - outBuf[0] = 0x00; - outBuf[1] = 0xff; - *(uint16_t *)(outBuf + 2) = s0; - *(uint16_t *)(outBuf + 4) = s1; - return link->send(outBuf, 6); -} - -template <class TPixyInterface> int8_t TPixy<TPixyInterface>::setBrightness(uint8_t brightness) -{ - uint8_t outBuf[3]; - outBuf[0] = 0x00; - outBuf[1] = 0xfe; - outBuf[2] = brightness; - return link->send(outBuf, 3); -} - -template <class TPixyInterface> int8_t TPixy<TPixyInterface>::setLED(uint8_t r, uint8_t g, uint8_t b) -{ - uint8_t outBuf[5]; - outBuf[0] = 0x00; - outBuf[1] = 0xfd; - outBuf[2] = r; - outBuf[3] = g; - outBuf[4] = b; - return link->send(outBuf, 5); -} - -#endif \ No newline at end of file