86 lines
2.3 KiB
C++
86 lines
2.3 KiB
C++
#include "breakout_encoder.hpp"
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#include <algorithm>
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namespace pimoroni {
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bool BreakoutEncoder::init(bool skip_chip_id_check) {
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bool success = false;
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if(ioe.init(skip_chip_id_check)) {
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if(interrupt_pin != PIN_UNUSED)
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ioe.enable_interrupt_out(true);
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ioe.setup_rotary_encoder(ENC_CHANNEL, ENC_TERM_A, ENC_TERM_B, ENC_TERM_C);
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// Calculate a period large enough to get 0-255 steps at the desired brightness
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uint16_t period = (uint16_t)(255.0f / brightness);
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ioe.set_pwm_period(period);
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ioe.set_pwm_control(2); // PWM as fast as we can to avoid LED flicker
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ioe.set_mode(LED_R, IOExpander::PIN_PWM, false, INVERT_OUTPUT);
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ioe.set_mode(LED_G, IOExpander::PIN_PWM, false, INVERT_OUTPUT);
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ioe.set_mode(LED_B, IOExpander::PIN_PWM, false, INVERT_OUTPUT);
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success = true;
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}
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return success;
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}
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i2c_inst_t* BreakoutEncoder::get_i2c() const {
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return ioe.get_i2c();
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}
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int BreakoutEncoder::get_sda() const {
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return ioe.get_sda();
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}
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int BreakoutEncoder::get_scl() const {
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return ioe.get_scl();
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}
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int BreakoutEncoder::get_int() const {
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return ioe.get_int();
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}
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void BreakoutEncoder::set_addr(uint8_t i2c_addr) {
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ioe.set_addr(i2c_addr);
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}
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bool BreakoutEncoder::get_direction(void) {
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return direction_cw;
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}
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void BreakoutEncoder::set_direction(bool clockwise) {
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direction_cw = clockwise;
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}
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void BreakoutEncoder::set_brightness(float brightness) {
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this->brightness = std::min(std::max(brightness, 0.01f), 1.0f);
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// Calculate a period large enough to get 0-255 steps at the desired brightness
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uint16_t period = (uint16_t)(255.0f / this->brightness);
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ioe.set_pwm_period(period);
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}
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void BreakoutEncoder::set_led(uint8_t r, uint8_t g, uint8_t b) {
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ioe.output(LED_R, r, false); // Hold off pwm load until the last
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ioe.output(LED_G, g, false); // Hold off pwm load until the last
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ioe.output(LED_B, b); // Loads all 3 pwms
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}
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bool BreakoutEncoder::available() {
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return (ioe.get_interrupt_flag() > 0);
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}
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int16_t BreakoutEncoder::read() {
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int16_t count = ioe.read_rotary_encoder(ENC_CHANNEL);
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if(!direction_cw)
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count = 0 - count;
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ioe.clear_interrupt_flag();
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return count;
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}
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} |