281 lines
8.4 KiB
C
281 lines
8.4 KiB
C
/*
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u8g_dev_ht1632.c
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1-Bit (BW) Driver for HT1632 controller
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Universal 8bit Graphics Library
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Copyright (c) 2013, olikraus@gmail.com
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this list
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of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice, this
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list of conditions and the following disclaimer in the documentation and/or other
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materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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U8G_PIN_NONE can be used as argument
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uint8_t u8g_InitSPI(u8g_t *u8g, u8g_dev_t *dev, uint8_t sck, uint8_t mosi, uint8_t cs, uint8_t a0, uint8_t reset)
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{
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...
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u8g->pin_list[U8G_PI_SCK] = sck;
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u8g->pin_list[U8G_PI_MOSI] = mosi;
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u8g->pin_list[U8G_PI_CS] = cs;
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u8g->pin_list[U8G_PI_A0] = a0;
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u8g->pin_list[U8G_PI_RESET] = reset;
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mapping
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#define DATA_PIN --> U8G_PI_MOSI
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#define WR_PIN --> U8G_PI_SCK
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#define CS_PIN --> U8G_PI_CS
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U8G_PI_A0 --> not used
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U8G_PI_RESET --> not used
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Usage:
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u8g_InitSPI(&u8g, &u8g_dev_ht1632_24x16, WR_PIN, DATA_IN, CS_PIN, U8G_PIN_NONE, U8G_PIN_NONE)
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*/
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#include "u8g.h"
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#define WIDTH 24
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#define HEIGHT 16
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#define PAGE_HEIGHT 16
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/* http://forum.arduino.cc/index.php?topic=168537.0 */
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#define HT1632_CMD_SYSDIS 0x00 // CMD= 0000-0000-x Turn off oscil
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#define HT1632_CMD_SYSON 0x01 // CMD= 0000-0001-x Enable system oscil
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#define HT1632_CMD_LEDOFF 0x02 // CMD= 0000-0010-x LED duty cycle gen off
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#define HT1632_CMD_LEDON 0x03 // CMD= 0000-0011-x LEDs ON
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#define HT1632_CMD_BLOFF 0x08 // CMD= 0000-1000-x Blink OFF
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#define HT1632_CMD_BLON 0x09 // CMD= 0000-1001-x Blink On
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#define HT1632_CMD_SLVMD 0x10 // CMD= 0001-00xx-x Slave Mode
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#define HT1632_CMD_MSTMD 0x14 // CMD= 0001-01xx-x Master Mode
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#define HT1632_CMD_RCCLK 0x18 // CMD= 0001-10xx-x Use on-chip clock
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#define HT1632_CMD_EXTCLK 0x1C // CMD= 0001-11xx-x Use external clock
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#define HT1632_CMD_COMS00 0x20 // CMD= 0010-ABxx-x commons options
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#define HT1632_CMD_COMS01 0x24 // CMD= 0010-ABxx-x commons options
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#define HT1632_CMD_COMS10 0x28 // CMD= 0010-ABxx-x commons options
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#define HT1632_CMD_COMS11 0x2C // P-MOS OUTPUT AND 16COMMON OPTION
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#define HT1632_CMD_PWM 0xA0 // CMD= 101x-PPPP-x PWM duty cycle
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#define HT1632_ID_CMD 4 /* ID = 100 - Commands */
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#define HT1632_ID_RD 6 /* ID = 110 - Read RAM */
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#define HT1632_ID_WR 5 /* ID = 101 - Write RAM */
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#define HT1632_ID_LEN 3 // IDs are 3 bits
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#define HT1632_CMD_LEN 8 // CMDs are 8 bits
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#define HT1632_DATA_LEN 8 // Data are 4*2 bits
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#define HT1632_ADDR_LEN 7 // Address are 7 bits
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#if defined(ARDUINO)
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#if ARDUINO < 100
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#include <WProgram.h>
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#else
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#include <Arduino.h>
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#endif
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//#define WR_PIN 3
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//#define DATA_PIN 2
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//#define CS_PIN 4
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void ht1632_write_data_MSB(u8g_t *u8g, uint8_t cnt, uint8_t data, uint8_t extra)
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{
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int8_t i;
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uint8_t data_pin = u8g->pin_list[U8G_PI_MOSI];
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uint8_t wr_pin = u8g->pin_list[U8G_PI_SCK];
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for(i = cnt - 1; i >= 0; i--)
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{
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if ((data >> i) & 1)
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{
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digitalWrite(data_pin, HIGH);
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}
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else
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{
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digitalWrite(data_pin, LOW);
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}
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digitalWrite(wr_pin, LOW);
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u8g_MicroDelay();
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digitalWrite(wr_pin, HIGH);
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u8g_MicroDelay();
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}
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// Send an extra bit
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if (extra)
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{
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digitalWrite(data_pin, HIGH);
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digitalWrite(wr_pin, LOW);
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u8g_MicroDelay();
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digitalWrite(wr_pin, HIGH);
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u8g_MicroDelay();
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}
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}
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void ht1632_write_data(u8g_t *u8g, uint8_t cnt, uint8_t data)
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{
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uint8_t i;
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uint8_t data_pin = u8g->pin_list[U8G_PI_MOSI];
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uint8_t wr_pin = u8g->pin_list[U8G_PI_SCK];
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for (i = 0; i < cnt; i++)
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{
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if ((data >> i) & 1) {
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digitalWrite(data_pin, HIGH);
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}
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else {
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digitalWrite(data_pin, LOW);
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}
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digitalWrite(wr_pin, LOW);
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u8g_MicroDelay();
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digitalWrite(wr_pin, HIGH);
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u8g_MicroDelay();
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}
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}
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void ht1632_init(u8g_t *u8g)
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{
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//uint8_t i;
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uint8_t data_pin = u8g->pin_list[U8G_PI_MOSI];
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uint8_t wr_pin = u8g->pin_list[U8G_PI_SCK];
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uint8_t cs_pin = u8g->pin_list[U8G_PI_CS];
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pinMode(data_pin, OUTPUT);
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pinMode(wr_pin, OUTPUT);
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pinMode(cs_pin, OUTPUT);
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digitalWrite(data_pin, HIGH);
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digitalWrite(wr_pin, HIGH);
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digitalWrite(cs_pin, HIGH);
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digitalWrite(cs_pin, LOW);
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/* init display once after startup */
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ht1632_write_data_MSB(u8g, 3, HT1632_ID_CMD, false); // IDs are 3 bits
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ht1632_write_data_MSB(u8g, 8, HT1632_CMD_SYSDIS, true); // 8 bits
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ht1632_write_data_MSB(u8g, 8, HT1632_CMD_SYSON, true); // 8 bits
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ht1632_write_data_MSB(u8g, 8, HT1632_CMD_COMS11, true); // 8 bits
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ht1632_write_data_MSB(u8g, 8, HT1632_CMD_LEDON, true); // 8 bits
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ht1632_write_data_MSB(u8g, 8, HT1632_CMD_BLOFF, true); // 8 bits
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ht1632_write_data_MSB(u8g, 8, HT1632_CMD_PWM+15, true); // 8 bits
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digitalWrite(cs_pin, HIGH);
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/* removed following (debug) code */
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/*
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digitalWrite(cs_pin, LOW);
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ht1632_write_data_MSB(u8g, 3, HT1632_ID_WR, false); // Send "write to display" command
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ht1632_write_data_MSB(u8g, 7, 0, false);
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for(i = 0; i<48; ++i)
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{
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ht1632_write_data(u8g, 8, 0xFF);
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}
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digitalWrite(cs_pin, HIGH);
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*/
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}
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/*
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page: 0=data contain lines 0..16, 1=data contain lines 16..32 (a 24x16 display will only have page 0)
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cnt: width of the display
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data: pointer to a buffer with 2*cnt bytes.
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*/
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void ht1632_transfer_data(u8g_t *u8g, uint8_t page, uint8_t cnt, uint8_t *data)
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{
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uint8_t addr;
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uint8_t cs_pin = u8g->pin_list[U8G_PI_CS];
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/* send data to the ht1632 */
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digitalWrite(cs_pin, LOW);
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ht1632_write_data_MSB(u8g, 3, HT1632_ID_WR, false); // Send "write to display" command
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ht1632_write_data_MSB(u8g, 7, page*2*cnt, false);
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// Operating in progressive addressing mode
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for (addr = 0; addr < cnt; addr++)
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{
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ht1632_write_data(u8g, 8, data[addr]);
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ht1632_write_data(u8g, 8, data[addr+cnt]);
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}
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digitalWrite(cs_pin, HIGH);
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}
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/* value is between 0...15 */
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void ht1632_set_contrast(u8g_t *u8g, uint8_t value)
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{
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uint8_t cs_pin = u8g->pin_list[U8G_PI_CS];
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digitalWrite(cs_pin, LOW);
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ht1632_write_data_MSB(u8g, 3, HT1632_ID_CMD, false);
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ht1632_write_data_MSB(u8g, 8, HT1632_CMD_PWM + value, false);
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digitalWrite(cs_pin, HIGH);
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}
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#else
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void ht1632_init(u8g_t *u8g)
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{
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}
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void ht1632_transfer_data(u8g_t *u8g, uint8_t page, uint8_t cnt, uint8_t *data)
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{
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}
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void ht1632_set_contrast(u8g_t *u8g, uint8_t value)
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{
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}
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#endif /* ARDUINO */
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uint8_t u8g_dev_ht1632_24x16_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg)
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{
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switch(msg)
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{
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case U8G_DEV_MSG_INIT:
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ht1632_init(u8g);
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break;
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case U8G_DEV_MSG_STOP:
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break;
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case U8G_DEV_MSG_PAGE_NEXT:
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{
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u8g_pb_t *pb = (u8g_pb_t *)(dev->dev_mem);
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/* current page: pb->p.page */
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/* ptr to the buffer: pb->buf */
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ht1632_transfer_data(u8g, pb->p.page, WIDTH, pb->buf);
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}
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break;
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case U8G_DEV_MSG_CONTRAST:
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/* values passed to SetContrast() are between 0 and 255, scale down to 0...15 */
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ht1632_set_contrast(u8g, (*(uint8_t *)arg) >> 4);
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return 1;
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}
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return u8g_dev_pb16v1_base_fn(u8g, dev, msg, arg);
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}
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uint8_t u8g_dev_ht1632_24x16_buf[WIDTH*2] U8G_NOCOMMON ;
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u8g_pb_t u8g_dev_ht1632_24x16_pb = { {16, HEIGHT, 0, 0, 0}, WIDTH, u8g_dev_ht1632_24x16_buf};
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u8g_dev_t u8g_dev_ht1632_24x16 = { u8g_dev_ht1632_24x16_fn, &u8g_dev_ht1632_24x16_pb, u8g_com_null_fn };
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