caijie
7 years ago
committed by
Andrew Tridgell
4 changed files with 178 additions and 9 deletions
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/*
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NCP5623 I2C LED driver |
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*/ |
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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 3 of the License, or |
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(at your option) any later version. |
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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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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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#include "NCP5623.h" |
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#include <utility> |
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#include <AP_HAL/AP_HAL.h> |
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extern const AP_HAL::HAL& hal; |
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#define NCP5623_LED_BRIGHT 0x1f // full brightness
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#define NCP5623_LED_MEDIUM 0x18 // medium brightness
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#define NCP5623_LED_DIM 0x0f // dim
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#define NCP5623_LED_OFF 0x00 // off
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#define NCP5623_LED_I2C_ADDR 0x38 // default I2C bus address
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#define NCP5623_LED_PWM0 0x40 // pwm0 register
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#define NCP5623_LED_PWM1 0x60 // pwm1 register
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#define NCP5623_LED_PWM2 0x80 // pwm2 register
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#define NCP5623_LED_ENABLE 0x20 // enable register
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NCP5623::NCP5623(uint8_t bus) |
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: RGBLed(NCP5623_LED_OFF, NCP5623_LED_BRIGHT, NCP5623_LED_MEDIUM, NCP5623_LED_DIM) |
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, _bus(bus) |
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{ |
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} |
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bool NCP5623::write(uint8_t reg, uint8_t data) |
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{ |
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uint8_t msg[1] = { 0x00 }; |
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msg[0] = ((reg & 0xe0) | (data & 0x1f)); |
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bool ret = _dev->transfer(msg, 1, nullptr, 0); |
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return ret; |
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} |
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bool NCP5623::writes(uint8_t *data, uint8_t len) |
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{ |
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bool ret = 0; |
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uint8_t reg = data[0]; |
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for (uint8_t i = 0; i < (len - 1); i++) { |
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ret = write(reg, data[i + 1]); |
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if (!ret) { |
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return ret; |
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} |
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reg = reg + 0x20; |
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} |
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return ret; |
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} |
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bool NCP5623::hw_init(void) |
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{ |
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// first look for led on external bus
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_dev = std::move(hal.i2c_mgr->get_device(_bus, NCP5623_LED_I2C_ADDR)); |
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if (!_dev || !_dev->get_semaphore()->take(HAL_SEMAPHORE_BLOCK_FOREVER)) { |
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return false; |
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} |
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_dev->set_retries(10); |
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// enable the led
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bool ret = write(NCP5623_LED_ENABLE, 0x1f); |
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if (!ret) { |
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_dev->get_semaphore()->give(); |
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return false; |
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} |
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// update the red, green and blue values to zero
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uint8_t val[4] = { NCP5623_LED_PWM0, _led_off, _led_off, _led_off }; |
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ret = writes(val, sizeof(val)); |
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_dev->set_retries(1); |
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// give back i2c semaphore
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_dev->get_semaphore()->give(); |
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if (ret) { |
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_dev->register_periodic_callback(20000, FUNCTOR_BIND_MEMBER(&NCP5623::_timer, void)); |
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} |
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return ret; |
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} |
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// set_rgb - set color as a combination of red, green and blue values
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bool NCP5623::hw_set_rgb(uint8_t red, uint8_t green, uint8_t blue) |
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{ |
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rgb = { red, green, blue }; |
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_need_update = true; |
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return true; |
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} |
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void NCP5623::_timer(void) |
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{ |
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if (!_need_update) { |
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return; |
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} |
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_need_update = false; |
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/* 4-bit for each color */ |
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uint8_t val[4] = { NCP5623_LED_PWM0, rgb.r, rgb.g, rgb.b }; |
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writes(val, sizeof(val)); |
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} |
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@ -0,0 +1,39 @@ |
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/*
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NCP5623 Linux driver |
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*/ |
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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 3 of the License, or |
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(at your option) any later version. |
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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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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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#pragma once |
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#include <AP_HAL/I2CDevice.h> |
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#include "RGBLed.h" |
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class NCP5623 : public RGBLed { |
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public: |
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NCP5623(uint8_t bus); |
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protected: |
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bool hw_init(void) override; |
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bool hw_set_rgb(uint8_t r, uint8_t g, uint8_t b) override; |
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private: |
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AP_HAL::OwnPtr<AP_HAL::I2CDevice> _dev; |
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void _timer(void); |
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bool write(uint8_t reg, uint8_t data); |
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bool writes(uint8_t *data, uint8_t len); |
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bool _need_update; |
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struct { |
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uint8_t r, g, b; |
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} rgb; |
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uint8_t _bus; |
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}; |
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