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/*
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MY9291 LED Driver Arduino library 0.1.0 |
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Copyright (c) 2016 - 2026 MaiKe Labs |
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Copyright (C) 2017 - Xose Pérez (for the library) |
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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 "my9291.h"
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extern "C" { |
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void os_delay_us(unsigned int); |
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} |
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void my9291::_di_pulse(unsigned int times) { |
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unsigned int i; |
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for (i = 0; i < times; i++) { |
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digitalWrite(_pin_di, HIGH); |
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digitalWrite(_pin_di, LOW); |
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} |
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} |
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void my9291::_dcki_pulse(unsigned int times) { |
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unsigned int i; |
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for (i = 0; i < times; i++) { |
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digitalWrite(_pin_dcki, HIGH); |
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digitalWrite(_pin_dcki, LOW); |
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} |
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} |
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void my9291::_set_cmd(my9291_cmd_t command) { |
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unsigned char i; |
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unsigned char command_data = *(unsigned char *) (&command); |
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_command = command; |
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// ets_intr_lock();
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// TStop > 12us.
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os_delay_us(12); |
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// Send 12 DI pulse, after 6 pulse's falling edge store duty data, and 12
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// pulse's rising edge convert to command mode.
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_di_pulse(12); |
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// Delay >12us, begin send CMD data
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os_delay_us(12); |
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// Send CMD data
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for (i = 0; i < 4; i++) { |
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// DCK = 0;
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digitalWrite(_pin_dcki, LOW); |
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if (command_data & 0x80) { |
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// DI = 1;
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digitalWrite(_pin_di, HIGH); |
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} else { |
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// DI = 0;
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digitalWrite(_pin_di, LOW); |
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} |
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// DCK = 1;
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digitalWrite(_pin_dcki, HIGH); |
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command_data = command_data << 1; |
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if (command_data & 0x80) { |
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// DI = 1;
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digitalWrite(_pin_di, HIGH); |
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} else { |
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// DI = 0;
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digitalWrite(_pin_di, LOW); |
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} |
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// DCK = 0;
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digitalWrite(_pin_dcki, LOW); |
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// DI = 0;
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digitalWrite(_pin_di, LOW); |
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command_data = command_data << 1; |
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} |
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// TStart > 12us. Delay 12 us.
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os_delay_us(12); |
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// Send 16 DI pulse,at 14 pulse's falling edge store CMD data, and
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// at 16 pulse's falling edge convert to duty mode.
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_di_pulse(16); |
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// TStop > 12us.
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os_delay_us(12); |
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// ets_intr_unlock();
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} |
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void my9291::send(unsigned int duty_r, unsigned int duty_g, unsigned int duty_b, unsigned int duty_w) { |
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unsigned char i = 0; |
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unsigned char channel = 0; |
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unsigned char bit_length = 8; |
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unsigned int duty_current = 0; |
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// Definition for RGBW channels
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unsigned int duty[4] = { duty_r, duty_g, duty_b, duty_w }; |
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switch (_command.bit_width) { |
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case MY9291_CMD_BIT_WIDTH_16: |
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bit_length = 16; |
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break; |
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case MY9291_CMD_BIT_WIDTH_14: |
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bit_length = 14; |
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break; |
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case MY9291_CMD_BIT_WIDTH_12: |
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bit_length = 12; |
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break; |
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case MY9291_CMD_BIT_WIDTH_8: |
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bit_length = 8; |
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break; |
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default: |
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bit_length = 8; |
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break; |
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} |
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// ets_intr_lock();
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// TStop > 12us.
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os_delay_us(12); |
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for (channel = 0; channel < 4; channel++) { //RGBW 4CH
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// RGBW Channel
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duty_current = duty[channel]; |
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// Send 8bit/12bit/14bit/16bit Data
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for (i = 0; i < bit_length / 2; i++) { |
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// DCK = 0;
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digitalWrite(_pin_dcki, LOW); |
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if (duty_current & (0x01 << (bit_length - 1))) { |
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// DI = 1;
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digitalWrite(_pin_di, HIGH); |
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} else { |
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// DI = 0;
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digitalWrite(_pin_di, LOW); |
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} |
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// DCK = 1;
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digitalWrite(_pin_dcki, HIGH); |
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duty_current = duty_current << 1; |
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if (duty_current & (0x01 << (bit_length - 1))) { |
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// DI = 1;
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digitalWrite(_pin_di, HIGH); |
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} else { |
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// DI = 0;
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digitalWrite(_pin_di, LOW); |
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} |
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//DCK = 0;
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digitalWrite(_pin_dcki, LOW); |
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//DI = 0;
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digitalWrite(_pin_di, LOW); |
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duty_current = duty_current << 1; |
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} |
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} |
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// TStart > 12us. Ready for send DI pulse.
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os_delay_us(12); |
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// Send 8 DI pulse. After 8 pulse falling edge, store old data.
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_di_pulse(8); |
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// TStop > 12us.
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os_delay_us(12); |
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// ets_intr_unlock();
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} |
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my9291::my9291(unsigned char di, unsigned char dcki, my9291_cmd_t command) { |
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_pin_di = di; |
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_pin_dcki = dcki; |
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pinMode(_pin_di, OUTPUT); |
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pinMode(_pin_dcki, OUTPUT); |
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digitalWrite(_pin_di, LOW); |
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digitalWrite(_pin_dcki, LOW); |
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// Clear all duty register
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_dcki_pulse(64 / 2); |
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_set_cmd(command); |
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} |
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