--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/components/u8g2/csrc/u8x8_d_ist7920.c Tue Oct 08 12:00:31 2019 +0200
@@ -0,0 +1,202 @@
+/*
+
+ u8x8_d_ist7920.c
+
+ this is NOT ST7920!
+
+ Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/)
+
+ Copyright (c) 2019, olikraus@gmail.com
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without modification,
+ are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice, this list
+ of conditions and the following disclaimer.
+
+ * Redistributions in binary form must reproduce the above copyright notice, this
+ list of conditions and the following disclaimer in the documentation and/or other
+ materials provided with the distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+ CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+*/
+#include "u8x8.h"
+
+
+
+
+static const uint8_t u8x8_d_ist7920_128x128_powersave0_seq[] = {
+ U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
+ U8X8_C(0x03d), /* display on */
+ U8X8_END_TRANSFER(), /* disable chip */
+ U8X8_END() /* end of sequence */
+};
+
+static const uint8_t u8x8_d_ist7920_128x128_powersave1_seq[] = {
+ U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
+ U8X8_C(0x03c), /* display off */
+ U8X8_END_TRANSFER(), /* disable chip */
+ U8X8_END() /* end of sequence */
+};
+
+static const uint8_t u8x8_d_ist7920_128x128_flip0_seq[] = {
+ U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
+ U8X8_C(0x064), /* Display Ctrl: Bit3: SHL 2:ADC 1:EON, 0:REV */
+ U8X8_END_TRANSFER(), /* disable chip */
+ U8X8_END() /* end of sequence */
+};
+
+static const uint8_t u8x8_d_ist7920_128x128_flip1_seq[] = {
+ U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
+ U8X8_C(0x068), /* Display Ctrl: Bit3: SHL 2:ADC 1:EON, 0:REV */
+ U8X8_END_TRANSFER(), /* disable chip */
+ U8X8_END() /* end of sequence */
+};
+
+
+static const u8x8_display_info_t u8x8_ist7920_128x128_display_info =
+{
+ /* chip_enable_level = */ 0,
+ /* chip_disable_level = */ 1,
+
+ /* post_chip_enable_wait_ns = */ 90, /* IST7920 datasheet, page 48 */
+ /* pre_chip_disable_wait_ns = */ 90, /* IST7920 datasheet, page 48 */
+ /* reset_pulse_width_ms = */ 10,
+ /* post_reset_wait_ms = */ 20, /* IST7920 Startup Seq.. */
+ /* sda_setup_time_ns = */ 45, /* IST7920 datasheet, page 48 */
+ /* sck_pulse_width_ns = */ 130, /* IST7920 datasheet, page 48 */
+ /* sck_clock_hz = */ 3000000UL, /* IST7920 datasheet: 260ns */
+ /* spi_mode = */ 0, /* active high, rising edge (not verified) */
+ /* i2c_bus_clock_100kHz = */ 4, /* 400kHz according to IST7920 datasheet */
+ /* data_setup_time_ns = */ 60, /* IST7920 datasheet, page 47 */
+ /* write_pulse_width_ns = */ 150, /* IST7920 datasheet, page 47 */
+ /* tile_width = */ 16, /* width of 16*8=128 pixel */
+ /* tile_hight = */ 16,
+ /* default_x_offset = */ 0,
+ /* flipmode_x_offset = */ 0,
+ /* pixel_width = */ 128,
+ /* pixel_height = */ 128
+};
+
+/* 1/128 Duty, 1/10 Bias, 128x128 round display */
+static const uint8_t u8x8_d_ist7920_128x128_init_seq[] = {
+
+ U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
+
+ U8X8_C(0x076), /* Software Reset */
+ U8X8_DLY(50),
+ U8X8_C(0x03c), /* display off */
+
+
+ U8X8_CA(0x090, 128), /* Set Duty */
+ //U8X8_CAA(0x0b2, 0x011, 0x00), /* Set Frame Control */
+
+ U8X8_CA(0x030, 16), /* Set Bias 0: 1/8, 8: 1/9, 16: 1/10, 24: 1/11, 48: 1/12 ... */
+ U8X8_CA(0x031, 0x03f), /* Set voltage generate clock(31H/11H) */
+ //U8X8_CA(0x032, 0x015), /* Temperature compensation */
+ U8X8_CA(0x033, 0x020), /* Power Control */
+ U8X8_DLY(100),
+ U8X8_CA(0x033, 0x02c), /* Power Control */
+ U8X8_DLY(100),
+ U8X8_C(0xfd), /* set booster */
+ U8X8_DLY(100),
+ U8X8_CA(0x033, 0x02f), /* Power Control */
+ U8X8_DLY(200),
+
+ U8X8_C(0x064), /* Display Ctrl: Bit3: SHL 2:ADC 1:EON, 0:REV */
+
+ U8X8_CAA(0x074, 0x000, 0x00f), /* AY Window */
+ U8X8_CAA(0x075, 0x000, 0x07f), /* AX Window */
+
+ U8X8_CA(0x040, 64), /* Start line at 64 */
+
+ U8X8_CA(0x0b1, 100), /* electronic volume */
+
+
+ U8X8_END_TRANSFER(), /* disable chip */
+ U8X8_END() /* end of sequence */
+};
+
+uint8_t u8x8_d_ist7920_128x128(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
+{
+ uint8_t x, c;
+ uint8_t *ptr;
+ switch(msg)
+ {
+ case U8X8_MSG_DISPLAY_SETUP_MEMORY:
+ u8x8_d_helper_display_setup_memory(u8x8, &u8x8_ist7920_128x128_display_info);
+ break;
+ case U8X8_MSG_DISPLAY_INIT:
+ u8x8_d_helper_display_init(u8x8);
+ u8x8_cad_SendSequence(u8x8, u8x8_d_ist7920_128x128_init_seq);
+ break;
+ case U8X8_MSG_DISPLAY_SET_POWER_SAVE:
+ if ( arg_int == 0 )
+ u8x8_cad_SendSequence(u8x8, u8x8_d_ist7920_128x128_powersave0_seq);
+ else
+ u8x8_cad_SendSequence(u8x8, u8x8_d_ist7920_128x128_powersave1_seq);
+ break;
+ case U8X8_MSG_DISPLAY_SET_FLIP_MODE:
+ if ( arg_int == 0 )
+ {
+ u8x8_cad_SendSequence(u8x8, u8x8_d_ist7920_128x128_flip0_seq);
+ u8x8->x_offset = u8x8->display_info->default_x_offset;
+ }
+ else
+ {
+ u8x8_cad_SendSequence(u8x8, u8x8_d_ist7920_128x128_flip1_seq);
+ u8x8->x_offset = u8x8->display_info->flipmode_x_offset;
+ }
+ break;
+#ifdef U8X8_WITH_SET_CONTRAST
+ case U8X8_MSG_DISPLAY_SET_CONTRAST:
+ u8x8_cad_StartTransfer(u8x8);
+ u8x8_cad_SendCmd(u8x8, 0x0b1 );
+ u8x8_cad_SendArg(u8x8, arg_int ); /* st7920 has range from 0 to 255 */
+ u8x8_cad_EndTransfer(u8x8);
+ break;
+#endif
+ case U8X8_MSG_DISPLAY_DRAW_TILE:
+ u8x8_cad_StartTransfer(u8x8);
+
+ x = ((u8x8_tile_t *)arg_ptr)->x_pos;
+ x *= 8;
+ x += u8x8->x_offset;
+ u8x8_cad_SendCmd(u8x8, 0x0c0 );
+ u8x8_cad_SendArg(u8x8, x );
+ u8x8_cad_SendCmd(u8x8, 0x001 );
+ u8x8_cad_SendArg(u8x8, (((u8x8_tile_t *)arg_ptr)->y_pos) );
+
+ c = ((u8x8_tile_t *)arg_ptr)->cnt;
+ c *= 8;
+ ptr = ((u8x8_tile_t *)arg_ptr)->tile_ptr;
+ do
+ {
+ u8x8_cad_SendData(u8x8, c, ptr); /* note: SendData can not handle more than 255 bytes */
+ arg_int--;
+ } while( arg_int > 0 );
+
+ u8x8_cad_EndTransfer(u8x8);
+ break;
+ default:
+ return 0;
+ }
+ return 1;
+}
+
+