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202 lines
7.0 KiB
202 lines
7.0 KiB
/*
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u8x8_d_ist7920.c
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this is NOT ST7920!
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Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/)
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Copyright (c) 2019, 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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*/
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#include "u8x8.h"
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static const uint8_t u8x8_d_ist7920_128x128_powersave0_seq[] = {
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U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
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U8X8_C(0x03d), /* display on */
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U8X8_END_TRANSFER(), /* disable chip */
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U8X8_END() /* end of sequence */
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};
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static const uint8_t u8x8_d_ist7920_128x128_powersave1_seq[] = {
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U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
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U8X8_C(0x03c), /* display off */
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U8X8_END_TRANSFER(), /* disable chip */
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U8X8_END() /* end of sequence */
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};
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static const uint8_t u8x8_d_ist7920_128x128_flip0_seq[] = {
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U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
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U8X8_C(0x064), /* Display Ctrl: Bit3: SHL 2:ADC 1:EON, 0:REV */
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U8X8_END_TRANSFER(), /* disable chip */
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U8X8_END() /* end of sequence */
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};
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static const uint8_t u8x8_d_ist7920_128x128_flip1_seq[] = {
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U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
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U8X8_C(0x068), /* Display Ctrl: Bit3: SHL 2:ADC 1:EON, 0:REV */
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U8X8_END_TRANSFER(), /* disable chip */
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U8X8_END() /* end of sequence */
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};
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static const u8x8_display_info_t u8x8_ist7920_128x128_display_info =
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{
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/* chip_enable_level = */ 0,
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/* chip_disable_level = */ 1,
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/* post_chip_enable_wait_ns = */ 90, /* IST7920 datasheet, page 48 */
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/* pre_chip_disable_wait_ns = */ 90, /* IST7920 datasheet, page 48 */
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/* reset_pulse_width_ms = */ 10,
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/* post_reset_wait_ms = */ 20, /* IST7920 Startup Seq.. */
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/* sda_setup_time_ns = */ 45, /* IST7920 datasheet, page 48 */
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/* sck_pulse_width_ns = */ 130, /* IST7920 datasheet, page 48 */
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/* sck_clock_hz = */ 3000000UL, /* IST7920 datasheet: 260ns */
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/* spi_mode = */ 0, /* active high, rising edge (not verified) */
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/* i2c_bus_clock_100kHz = */ 4, /* 400kHz according to IST7920 datasheet */
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/* data_setup_time_ns = */ 60, /* IST7920 datasheet, page 47 */
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/* write_pulse_width_ns = */ 150, /* IST7920 datasheet, page 47 */
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/* tile_width = */ 16, /* width of 16*8=128 pixel */
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/* tile_height = */ 16,
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/* default_x_offset = */ 0,
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/* flipmode_x_offset = */ 0,
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/* pixel_width = */ 128,
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/* pixel_height = */ 128
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};
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/* 1/128 Duty, 1/10 Bias, 128x128 round display */
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static const uint8_t u8x8_d_ist7920_128x128_init_seq[] = {
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U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
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U8X8_C(0x076), /* Software Reset */
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U8X8_DLY(50),
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U8X8_C(0x03c), /* display off */
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U8X8_CA(0x090, 128), /* Set Duty */
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//U8X8_CAA(0x0b2, 0x011, 0x00), /* Set Frame Control */
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U8X8_CA(0x030, 16), /* Set Bias 0: 1/8, 8: 1/9, 16: 1/10, 24: 1/11, 48: 1/12 ... */
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U8X8_CA(0x031, 0x03f), /* Set voltage generate clock(31H/11H) */
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//U8X8_CA(0x032, 0x015), /* Temperature compensation */
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U8X8_CA(0x033, 0x020), /* Power Control */
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U8X8_DLY(100),
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U8X8_CA(0x033, 0x02c), /* Power Control */
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U8X8_DLY(100),
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U8X8_C(0xfd), /* set booster */
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U8X8_DLY(100),
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U8X8_CA(0x033, 0x02f), /* Power Control */
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U8X8_DLY(200),
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U8X8_C(0x064), /* Display Ctrl: Bit3: SHL 2:ADC 1:EON, 0:REV */
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U8X8_CAA(0x074, 0x000, 0x00f), /* AY Window */
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U8X8_CAA(0x075, 0x000, 0x07f), /* AX Window */
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U8X8_CA(0x040, 64), /* Start line at 64 */
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U8X8_CA(0x0b1, 100), /* electronic volume */
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U8X8_END_TRANSFER(), /* disable chip */
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U8X8_END() /* end of sequence */
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};
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uint8_t u8x8_d_ist7920_128x128(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
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{
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uint8_t x, c;
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uint8_t *ptr;
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switch(msg)
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{
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case U8X8_MSG_DISPLAY_SETUP_MEMORY:
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u8x8_d_helper_display_setup_memory(u8x8, &u8x8_ist7920_128x128_display_info);
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break;
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case U8X8_MSG_DISPLAY_INIT:
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u8x8_d_helper_display_init(u8x8);
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u8x8_cad_SendSequence(u8x8, u8x8_d_ist7920_128x128_init_seq);
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break;
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case U8X8_MSG_DISPLAY_SET_POWER_SAVE:
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if ( arg_int == 0 )
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u8x8_cad_SendSequence(u8x8, u8x8_d_ist7920_128x128_powersave0_seq);
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else
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u8x8_cad_SendSequence(u8x8, u8x8_d_ist7920_128x128_powersave1_seq);
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break;
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case U8X8_MSG_DISPLAY_SET_FLIP_MODE:
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if ( arg_int == 0 )
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{
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u8x8_cad_SendSequence(u8x8, u8x8_d_ist7920_128x128_flip0_seq);
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u8x8->x_offset = u8x8->display_info->default_x_offset;
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}
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else
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{
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u8x8_cad_SendSequence(u8x8, u8x8_d_ist7920_128x128_flip1_seq);
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u8x8->x_offset = u8x8->display_info->flipmode_x_offset;
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}
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break;
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#ifdef U8X8_WITH_SET_CONTRAST
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case U8X8_MSG_DISPLAY_SET_CONTRAST:
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u8x8_cad_StartTransfer(u8x8);
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u8x8_cad_SendCmd(u8x8, 0x0b1 );
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u8x8_cad_SendArg(u8x8, arg_int ); /* st7920 has range from 0 to 255 */
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u8x8_cad_EndTransfer(u8x8);
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break;
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#endif
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case U8X8_MSG_DISPLAY_DRAW_TILE:
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u8x8_cad_StartTransfer(u8x8);
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x = ((u8x8_tile_t *)arg_ptr)->x_pos;
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x *= 8;
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x += u8x8->x_offset;
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u8x8_cad_SendCmd(u8x8, 0x0c0 );
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u8x8_cad_SendArg(u8x8, x );
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u8x8_cad_SendCmd(u8x8, 0x001 );
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u8x8_cad_SendArg(u8x8, (((u8x8_tile_t *)arg_ptr)->y_pos) );
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c = ((u8x8_tile_t *)arg_ptr)->cnt;
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c *= 8;
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ptr = ((u8x8_tile_t *)arg_ptr)->tile_ptr;
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do
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{
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u8x8_cad_SendData(u8x8, c, ptr); /* note: SendData can not handle more than 255 bytes */
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arg_int--;
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} while( arg_int > 0 );
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u8x8_cad_EndTransfer(u8x8);
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break;
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default:
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return 0;
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}
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return 1;
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}
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