summaryrefslogtreecommitdiff
path: root/drivers/sensors/paw3204.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/sensors/paw3204.c')
-rw-r--r--drivers/sensors/paw3204.c172
1 files changed, 172 insertions, 0 deletions
diff --git a/drivers/sensors/paw3204.c b/drivers/sensors/paw3204.c
new file mode 100644
index 0000000000..a13753dd6f
--- /dev/null
+++ b/drivers/sensors/paw3204.c
@@ -0,0 +1,172 @@
+/* Copyright 2021 Gompa (@Gompa)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+// https://github.com/shinoaliceKabocha/choco60_track/tree/master/keymaps/default
+
+#include "paw3204.h"
+#include "wait.h"
+#include "debug.h"
+#include "gpio.h"
+
+#define REG_PID1 0x00
+#define REG_PID2 0x01
+#define REG_STAT 0x02
+#define REG_X 0x03
+#define REG_Y 0x04
+
+#define REG_SETUP 0x06
+#define REG_IMGQUAL 0x07
+#define REG_IMGREC 0x0E
+#define REG_IMGTRASH 0x0D
+
+#define constrain(amt, low, high) ((amt) < (low) ? (low) : ((amt) > (high) ? (high) : (amt)))
+
+// CPI values
+enum cpi_values {
+ CPI400, // 0b000
+ CPI500, // 0b001
+ CPI600, // 0b010
+ CPI800, // 0b011
+ CPI1000, // 0b100
+ CPI1200, // 0b101
+ CPI1600, // 0b110
+};
+
+uint8_t paw3204_serial_read(void);
+void paw3204_serial_write(uint8_t reg_addr);
+uint8_t paw3204_read_reg(uint8_t reg_addr);
+void paw3204_write_reg(uint8_t reg_addr, uint8_t data);
+
+void paw3204_init(void) {
+ setPinOutput(PAW3204_SCLK_PIN); // setclockpin to output
+ setPinInputHigh(PAW3204_SDIO_PIN); // set datapin input high
+
+ paw3204_write_reg(REG_SETUP, 0x86); // reset sensor and set 1600cpi
+ wait_us(5);
+
+ paw3204_read_reg(0x00); // read id
+ paw3204_read_reg(0x01); // read id2
+ // PAW3204_write_reg(REG_SETUP,0x06); // dont reset sensor and set cpi 1600
+ paw3204_write_reg(REG_IMGTRASH, 0x32); // write image trashhold
+}
+
+uint8_t paw3204_serial_read(void) {
+ setPinInput(PAW3204_SDIO_PIN);
+ uint8_t byte = 0;
+
+ for (uint8_t i = 0; i < 8; ++i) {
+ writePinLow(PAW3204_SCLK_PIN);
+ wait_us(1);
+
+ byte = (byte << 1) | readPin(PAW3204_SDIO_PIN);
+
+ writePinHigh(PAW3204_SCLK_PIN);
+ wait_us(1);
+ }
+
+ return byte;
+}
+
+void paw3204_serial_write(uint8_t data) {
+ writePinLow(PAW3204_SDIO_PIN);
+ setPinOutput(PAW3204_SDIO_PIN);
+
+ for (int8_t b = 7; b >= 0; b--) {
+ writePinLow(PAW3204_SCLK_PIN);
+ if (data & (1 << b)) {
+ writePinHigh(PAW3204_SDIO_PIN);
+ } else {
+ writePinLow(PAW3204_SDIO_PIN);
+ }
+ writePinHigh(PAW3204_SCLK_PIN);
+ }
+
+ wait_us(4);
+}
+
+report_paw3204_t paw3204_read(void) {
+ report_paw3204_t data = {0};
+
+ data.isMotion = paw3204_read_reg(REG_STAT) & (1 << 7); // check for motion only (bit 7 in field)
+ data.x = (int8_t)paw3204_read_reg(REG_X);
+ data.y = (int8_t)paw3204_read_reg(REG_Y);
+
+ return data;
+}
+
+void paw3204_write_reg(uint8_t reg_addr, uint8_t data) {
+ paw3204_serial_write(0b10000000 | reg_addr);
+ paw3204_serial_write(data);
+}
+
+uint8_t paw3204_read_reg(uint8_t reg_addr) {
+ paw3204_serial_write(reg_addr);
+ wait_us(5);
+ return paw3204_serial_read();
+}
+
+void paw3204_set_cpi(uint16_t cpi) {
+ uint8_t cpival = CPI1000;
+ if (cpi <= 450) {
+ cpival = CPI400;
+ } else if (cpi <= 550) {
+ cpival = CPI500;
+ } else if (cpi <= 700) {
+ cpival = CPI600;
+ } else if (cpi <= 900) {
+ cpival = CPI800;
+ } else if (cpi <= 1100) {
+ cpival = CPI1000;
+ } else if (cpi <= 1400) {
+ cpival = CPI1200;
+ } else if (cpi > 1400) {
+ cpival = CPI1600;
+ }
+ paw3204_write_reg(REG_SETUP, cpival);
+}
+
+uint16_t paw3204_get_cpi(void) {
+ uint16_t cpival = 1000;
+
+ switch (paw3204_read_reg(REG_SETUP) & 0b111) {
+ case CPI400:
+ cpival = 400;
+ break;
+ case CPI500:
+ cpival = 500;
+ break;
+ case CPI600:
+ cpival = 600;
+ break;
+ case CPI800:
+ cpival = 800;
+ break;
+ case CPI1000:
+ cpival = 1000;
+ break;
+ case CPI1200:
+ cpival = 1200;
+ break;
+ case CPI1600:
+ cpival = 1600;
+ break;
+ }
+ return cpival;
+}
+
+uint8_t read_pid_paw3204(void) {
+ return paw3204_read_reg(REG_PID1);
+}