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172 lines
4.5 KiB
172 lines
4.5 KiB
/* Copyright 2021 Gompa (@Gompa)
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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// https://github.com/shinoaliceKabocha/choco60_track/tree/master/keymaps/default
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#include "paw3204.h"
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#include "wait.h"
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#include "debug.h"
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#include "gpio.h"
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#define REG_PID1 0x00
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#define REG_PID2 0x01
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#define REG_STAT 0x02
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#define REG_X 0x03
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#define REG_Y 0x04
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#define REG_SETUP 0x06
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#define REG_IMGQUAL 0x07
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#define REG_IMGREC 0x0E
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#define REG_IMGTRASH 0x0D
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#define constrain(amt, low, high) ((amt) < (low) ? (low) : ((amt) > (high) ? (high) : (amt)))
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// CPI values
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enum cpi_values {
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CPI400, // 0b000
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CPI500, // 0b001
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CPI600, // 0b010
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CPI800, // 0b011
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CPI1000, // 0b100
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CPI1200, // 0b101
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CPI1600, // 0b110
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};
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uint8_t paw3204_serial_read(void);
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void paw3204_serial_write(uint8_t reg_addr);
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uint8_t paw3204_read_reg(uint8_t reg_addr);
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void paw3204_write_reg(uint8_t reg_addr, uint8_t data);
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void paw3204_init(void) {
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gpio_set_pin_output(PAW3204_SCLK_PIN); // setclockpin to output
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gpio_set_pin_input_high(PAW3204_SDIO_PIN); // set datapin input high
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paw3204_write_reg(REG_SETUP, 0x86); // reset sensor and set 1600cpi
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wait_us(5);
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paw3204_read_reg(0x00); // read id
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paw3204_read_reg(0x01); // read id2
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// PAW3204_write_reg(REG_SETUP,0x06); // dont reset sensor and set cpi 1600
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paw3204_write_reg(REG_IMGTRASH, 0x32); // write image trashhold
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}
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uint8_t paw3204_serial_read(void) {
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gpio_set_pin_input(PAW3204_SDIO_PIN);
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uint8_t byte = 0;
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for (uint8_t i = 0; i < 8; ++i) {
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gpio_write_pin_low(PAW3204_SCLK_PIN);
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wait_us(1);
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byte = (byte << 1) | gpio_read_pin(PAW3204_SDIO_PIN);
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gpio_write_pin_high(PAW3204_SCLK_PIN);
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wait_us(1);
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}
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return byte;
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}
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void paw3204_serial_write(uint8_t data) {
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gpio_write_pin_low(PAW3204_SDIO_PIN);
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gpio_set_pin_output(PAW3204_SDIO_PIN);
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for (int8_t b = 7; b >= 0; b--) {
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gpio_write_pin_low(PAW3204_SCLK_PIN);
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if (data & (1 << b)) {
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gpio_write_pin_high(PAW3204_SDIO_PIN);
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} else {
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gpio_write_pin_low(PAW3204_SDIO_PIN);
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}
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gpio_write_pin_high(PAW3204_SCLK_PIN);
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}
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wait_us(4);
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}
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report_paw3204_t paw3204_read(void) {
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report_paw3204_t data = {0};
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data.isMotion = paw3204_read_reg(REG_STAT) & (1 << 7); // check for motion only (bit 7 in field)
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data.x = (int8_t)paw3204_read_reg(REG_X);
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data.y = (int8_t)paw3204_read_reg(REG_Y);
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return data;
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}
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void paw3204_write_reg(uint8_t reg_addr, uint8_t data) {
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paw3204_serial_write(0b10000000 | reg_addr);
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paw3204_serial_write(data);
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}
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uint8_t paw3204_read_reg(uint8_t reg_addr) {
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paw3204_serial_write(reg_addr);
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wait_us(5);
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return paw3204_serial_read();
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}
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void paw3204_set_cpi(uint16_t cpi) {
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uint8_t cpival = CPI1000;
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if (cpi <= 450) {
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cpival = CPI400;
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} else if (cpi <= 550) {
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cpival = CPI500;
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} else if (cpi <= 700) {
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cpival = CPI600;
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} else if (cpi <= 900) {
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cpival = CPI800;
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} else if (cpi <= 1100) {
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cpival = CPI1000;
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} else if (cpi <= 1400) {
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cpival = CPI1200;
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} else if (cpi > 1400) {
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cpival = CPI1600;
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}
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paw3204_write_reg(REG_SETUP, cpival);
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}
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uint16_t paw3204_get_cpi(void) {
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uint16_t cpival = 1000;
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switch (paw3204_read_reg(REG_SETUP) & 0b111) {
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case CPI400:
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cpival = 400;
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break;
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case CPI500:
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cpival = 500;
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break;
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case CPI600:
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cpival = 600;
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break;
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case CPI800:
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cpival = 800;
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break;
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case CPI1000:
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cpival = 1000;
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break;
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case CPI1200:
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cpival = 1200;
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break;
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case CPI1600:
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cpival = 1600;
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break;
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}
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return cpival;
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}
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uint8_t read_pid_paw3204(void) {
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return paw3204_read_reg(REG_PID1);
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}
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