80 lines
1.7 KiB
C++
Executable File
80 lines
1.7 KiB
C++
Executable File
#include "pat9125.h"
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#include "swspi.h"
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#ifdef SWSPI_RPI
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// #include <bcm2835.h>
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#define DELAY(delay) usleep(delay)
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#endif //SWSPI_RPI
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#ifdef SWSPI_AVR
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#include "Arduino.h"
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#define DELAY(delay) delayMicroseconds(delay)
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#endif //SWSPI_AVR
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unsigned char ucPID1 = 0;
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unsigned char ucPID2 = 0;
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int pat9125_x = 0;
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int pat9125_y = 0;
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int pat9125_b = 0;
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int pat9125_init(unsigned char xres, unsigned char yres)
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{
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swspi_init();
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ucPID1 = pat9125_rd_reg(PAT9125_PID1);
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ucPID2 = pat9125_rd_reg(PAT9125_PID2);
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if ((ucPID1 != 0x31) || (ucPID2 != 0x91))
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{
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return 0;
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}
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pat9125_wr_reg(PAT9125_RES_X, xres);
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pat9125_wr_reg(PAT9125_RES_Y, yres);
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return 1;
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}
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int pat9125_update()
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{
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if ((ucPID1 == 0x31) && (ucPID2 == 0x91))
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{
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unsigned char ucMotion = pat9125_rd_reg(PAT9125_MOTION);
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pat9125_b = pat9125_rd_reg(PAT9125_FRAME);
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if (ucMotion & 0x80)
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{
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unsigned char ucXL = pat9125_rd_reg(PAT9125_DELTA_XL);
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unsigned char ucYL = pat9125_rd_reg(PAT9125_DELTA_YL);
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unsigned char ucXYH = pat9125_rd_reg(PAT9125_DELTA_XYH);
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int iDX = ucXL | ((ucXYH << 4) & 0xf00);
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int iDY = ucYL | ((ucXYH << 8) & 0xf00);
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if (iDX & 0x800) iDX -= 4096;
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if (iDY & 0x800) iDY -= 4096;
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// pat9125_x += iDX;
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pat9125_y += iDY;
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return 1;
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}
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}
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return 0;
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}
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unsigned char pat9125_rd_reg(unsigned char addr)
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{
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swspi_start();
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DELAY(100);
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swspi_tx(addr & 0x7f);
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DELAY(100);
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unsigned char data = swspi_rx();
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swspi_stop();
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DELAY(100);
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return data;
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}
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void pat9125_wr_reg(unsigned char addr, unsigned char data)
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{
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swspi_start();
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DELAY(100);
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swspi_tx(addr | 0x80);
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DELAY(100);
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swspi_tx(data);
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swspi_stop();
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DELAY(100);
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}
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