33 lines
1.2 KiB
C
33 lines
1.2 KiB
C
// Copyright 2022 Stefan Kerkmann (KarlK90)
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// Copyright 2021 Alabastard (@Alabastard-64)
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// Copyright 2020 Christopher Courtney, aka Drashna Jael're (@drashna) <drashna@live.com>
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// Copyright 2019 Sunjun Kim
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// Copyright 2020 Ploopy Corporation
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "pmw33xx_common.h"
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#include "progmem.h"
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uint16_t pmw33xx_get_cpi(uint8_t sensor) {
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if (sensor >= pmw33xx_number_of_sensors) {
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return 0;
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}
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uint16_t cpival = (pmw33xx_read(sensor, REG_Resolution_H) << 8) | pmw33xx_read(sensor, REG_Resolution_L);
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return (uint16_t)((cpival + 1) & 0xFFFF) * PMW33XX_CPI_STEP;
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}
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void pmw33xx_set_cpi(uint8_t sensor, uint16_t cpi) {
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if (sensor >= pmw33xx_number_of_sensors) {
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return;
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}
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uint16_t cpival = CONSTRAIN((cpi / PMW33XX_CPI_STEP), (PMW33XX_CPI_MIN / PMW33XX_CPI_STEP), (PMW33XX_CPI_MAX / PMW33XX_CPI_STEP)) - 1U;
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// Sets upper byte first for more consistent setting of cpi
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pmw33xx_write(sensor, REG_Resolution_H, (cpival >> 8) & 0xFF);
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pmw33xx_write(sensor, REG_Resolution_L, cpival & 0xFF);
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}
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// PID, Inverse PID
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const uint8_t pmw33xx_firmware_signature[2] PROGMEM = {0x42, 0xBD};
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