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97 lines
2.7 KiB
97 lines
2.7 KiB
/* |
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ToshibaLED I2C 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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/* LED driver for TCA62724FMG */ |
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#include "ToshibaLED_I2C.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 TOSHIBA_LED_BRIGHT 0xFF // full brightness |
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#define TOSHIBA_LED_MEDIUM 0x80 // medium brightness |
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#define TOSHIBA_LED_DIM 0x11 // dim |
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#define TOSHIBA_LED_OFF 0x00 // off |
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#define TOSHIBA_LED_I2C_ADDR 0x55 // default I2C bus address |
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#define TOSHIBA_LED_PWM0 0x01 // pwm0 register |
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#define TOSHIBA_LED_PWM1 0x02 // pwm1 register |
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#define TOSHIBA_LED_PWM2 0x03 // pwm2 register |
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#define TOSHIBA_LED_ENABLE 0x04 // enable register |
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ToshibaLED_I2C::ToshibaLED_I2C(uint8_t bus) |
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: RGBLed(TOSHIBA_LED_OFF, TOSHIBA_LED_BRIGHT, TOSHIBA_LED_MEDIUM, TOSHIBA_LED_DIM) |
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, _bus(bus) |
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{ |
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} |
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bool ToshibaLED_I2C::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, TOSHIBA_LED_I2C_ADDR)); |
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if (!_dev) { |
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return false; |
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} |
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WITH_SEMAPHORE(_dev->get_semaphore()); |
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_dev->set_retries(10); |
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// enable the led |
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bool ret = _dev->write_register(TOSHIBA_LED_ENABLE, 0x03); |
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if (!ret) { |
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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] = { TOSHIBA_LED_PWM0, _led_off, _led_off, _led_off }; |
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ret = _dev->transfer(val, sizeof(val), nullptr, 0); |
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_dev->set_retries(1); |
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if (ret) { |
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_dev->register_periodic_callback(20000, FUNCTOR_BIND_MEMBER(&ToshibaLED_I2C::_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 ToshibaLED_I2C::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 ToshibaLED_I2C::_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] = { TOSHIBA_LED_PWM0, (uint8_t)(rgb.b >> 4), |
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(uint8_t)(rgb.g / 16), (uint8_t)(rgb.r / 16) }; |
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_dev->transfer(val, sizeof(val), nullptr, 0); |
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}
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