95 lines
3.1 KiB
C
95 lines
3.1 KiB
C
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/* Copyright 2020 Jay Greco
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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 2 of the License, or
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* (at your option) any later version.
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*
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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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*
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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 <quantum.h>
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#include <stdint.h>
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#include <i2c_master.h>
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#include <progmem.h>
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#define I2C_TIMEOUT 100
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#define OSC_ENABLED 0x01
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#define OSC_DISABLED 0x00
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#define HT16K33_DISP_ON 0x01
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#define HT16K33_DISP_OFF 0x01
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#define HT16K33_BLINK_OFF 0x00
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#define HT16K33_BLINK_ON 0x01
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#define HT16K33_BLINK_2HZ 0x01
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#define HT16K33_BLINK_1HZ 0x02
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#define HT16K33_BLINK_HALFHZ 0x03
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#define HT16K33_CMD_DISP 0x00
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#define HT16K33_CMD_ENABLE 0x20
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#define HT16K33_CMD_BLINK 0x80
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#define HT16K33_CMD_BRIGHTNESS 0xE0
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#define HT16K33_BRIGHTNESS_MIN 0x00
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#define HT16K33_BRIGHTNESS_MAX 0x0F
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void ht16K33_init(uint8_t addr),
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ht16K33_setBlinkMode(uint8_t addr, uint8_t mode),
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ht16K33_setBrightness(uint8_t addr, uint8_t brightness),
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ht16K33_refresh(uint8_t addr, uint16_t *displayBuffer, uint8_t bufLen);
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#if defined(__AVR__)
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static i2c_status_t i2c_transmit_P(uint8_t address, const uint8_t *data, uint16_t length, uint16_t timeout) {
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i2c_status_t status = i2c_start(address | I2C_WRITE, timeout);
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for (uint16_t i = 0; i < length && status >= 0; i++) {
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status = i2c_write(pgm_read_byte((const char *)data++), timeout);
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if (status) break;
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}
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i2c_stop();
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return status;
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}
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#endif
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void ht16K33_init(uint8_t addr) {
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i2c_init();
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static const uint8_t PROGMEM data[] = {HT16K33_CMD_ENABLE | OSC_ENABLED};
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i2c_transmit_P((addr << 1), &data[0], sizeof(data), I2C_TIMEOUT);
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ht16K33_setBrightness(addr, HT16K33_BRIGHTNESS_MIN);
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ht16K33_setBlinkMode(addr, HT16K33_BLINK_OFF);
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}
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void ht16K33_setBlinkMode(uint8_t addr, uint8_t mode) {
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if ((mode < HT16K33_BLINK_OFF)|(mode > HT16K33_BLINK_HALFHZ)) {
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mode = HT16K33_BLINK_OFF;
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}
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uint8_t data[] = {(HT16K33_CMD_BLINK | mode << 1 | HT16K33_DISP_ON)};
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i2c_transmit((addr << 1), &data[0], sizeof(data), I2C_TIMEOUT);
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}
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void ht16K33_setBrightness(uint8_t addr, uint8_t brightness) {
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uint8_t data[] = {(HT16K33_CMD_BRIGHTNESS | brightness)};
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i2c_transmit((addr << 1), &data[0], sizeof(data), I2C_TIMEOUT);
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}
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void ht16K33_refresh(uint8_t addr, uint16_t *displayBuffer, uint8_t bufLen) {
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i2c_start((addr << 1), I2C_TIMEOUT);
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i2c_write((uint8_t)HT16K33_CMD_DISP, I2C_TIMEOUT);
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for (int i = 0; i < bufLen; i++) {
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i2c_write((displayBuffer[i] & 0xFF), I2C_TIMEOUT);
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i2c_write((displayBuffer[i] >> 8), I2C_TIMEOUT);
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}
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i2c_stop();
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}
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