223 lines
8.4 KiB
C
223 lines
8.4 KiB
C
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#include "u8g2_glue.h"
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#include <furi-hal.h>
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static FuriHalSpiDevice* u8g2_periphery_display = NULL;
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uint8_t u8g2_gpio_and_delay_stm32(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr) {
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switch(msg) {
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case U8X8_MSG_GPIO_AND_DELAY_INIT:
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/* HAL initialization contains all what we need so we can skip this part. */
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break;
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case U8X8_MSG_DELAY_MILLI:
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delay(arg_int);
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break;
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case U8X8_MSG_DELAY_10MICRO:
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delay_us(10);
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break;
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case U8X8_MSG_DELAY_100NANO:
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asm("nop");
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break;
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case U8X8_MSG_GPIO_RESET:
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hal_gpio_write(&gpio_display_rst, arg_int);
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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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uint8_t u8x8_hw_spi_stm32(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr) {
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switch(msg) {
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case U8X8_MSG_BYTE_SEND:
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furi_hal_spi_bus_tx(u8g2_periphery_display->bus, (uint8_t*)arg_ptr, arg_int, 10000);
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break;
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case U8X8_MSG_BYTE_SET_DC:
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hal_gpio_write(&gpio_display_di, arg_int);
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break;
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case U8X8_MSG_BYTE_INIT:
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break;
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case U8X8_MSG_BYTE_START_TRANSFER:
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furi_assert(u8g2_periphery_display == NULL);
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u8g2_periphery_display =
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(FuriHalSpiDevice*)furi_hal_spi_device_get(FuriHalSpiDeviceIdDisplay);
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hal_gpio_write(u8g2_periphery_display->chip_select, false);
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break;
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case U8X8_MSG_BYTE_END_TRANSFER:
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furi_assert(u8g2_periphery_display);
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hal_gpio_write(u8g2_periphery_display->chip_select, true);
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furi_hal_spi_device_return(u8g2_periphery_display);
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u8g2_periphery_display = NULL;
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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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static const uint8_t u8x8_d_st7565_powersave0_seq[] = {
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U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
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U8X8_C(0x0a4), /* all pixel off, issue 142 */
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U8X8_C(0x0af), /* 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_st7565_powersave1_seq[] = {
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U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
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U8X8_C(0x0ae), /* display off */
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U8X8_C(0x0a5), /* enter powersafe: all pixel on, issue 142 */
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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_st7565_flip0_seq[] = {
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U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
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U8X8_C(0x0a1), /* segment remap a0/a1*/
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U8X8_C(0x0c0), /* c0: scan dir normal, c8: reverse */
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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_st7565_flip1_seq[] = {
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U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
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U8X8_C(0x0a0), /* segment remap a0/a1*/
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U8X8_C(0x0c8), /* c0: scan dir normal, c8: reverse */
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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_st756x_128x64_display_info = {
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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 = 150, /* st7565 datasheet, table 26, tcsh */
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.pre_chip_disable_wait_ns = 50, /* st7565 datasheet, table 26, tcss */
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.reset_pulse_width_ms = 1,
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.post_reset_wait_ms = 1,
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.sda_setup_time_ns = 50, /* st7565 datasheet, table 26, tsds */
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.sck_pulse_width_ns = 120, /* half of cycle time (100ns according to datasheet), AVR: below 70: 8 MHz, >= 70 --> 4MHz clock */
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.sck_clock_hz = 4000000UL, /* since Arduino 1.6.0, the SPI bus speed in Hz. Should be 1000000000/sck_pulse_width_ns */
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.spi_mode = 0, /* active high, rising edge */
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.i2c_bus_clock_100kHz = 4,
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.data_setup_time_ns = 40, /* st7565 datasheet, table 24, tds8 */
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.write_pulse_width_ns = 80, /* st7565 datasheet, table 24, tcclw */
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.tile_width = 16, /* width of 16*8=128 pixel */
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.tile_height = 8,
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.default_x_offset = 0,
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.flipmode_x_offset = 4,
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.pixel_width = 128,
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.pixel_height = 64
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};
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uint8_t u8x8_d_st7565_common(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr) {
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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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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, 0x010 | (x>>4) );
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u8x8_cad_SendCmd(u8x8, 0x000 | ((x&15)));
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u8x8_cad_SendCmd(u8x8, 0x0b0 | (((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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/*
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The following if condition checks the hardware limits of the st7565
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controller: It is not allowed to write beyond the display limits.
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This is in fact an issue within flip mode.
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*/
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if ( c + x > 132u ) {
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c = 132u;
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c -= x;
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}
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do {
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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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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_st7565_powersave0_seq);
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else
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u8x8_cad_SendSequence(u8x8, u8x8_d_st7565_powersave1_seq);
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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, 0x081 );
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u8x8_cad_SendArg(u8x8, arg_int >> 2 ); /* st7565 has range from 0 to 63 */
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u8x8_cad_EndTransfer(u8x8);
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break;
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#endif
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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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static const uint8_t u8x8_d_st756x_erc_init_seq[] = {
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U8X8_START_TRANSFER(),
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U8X8_C(0x0e2), // soft reset
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U8X8_C(0xA3), // CMD_SET_BIAS_7
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U8X8_C(0xA0), // CMD_SET_ADC_NORMAL
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U8X8_C(0xC8), // CMD_SET_COM_REVERSE
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U8X8_C(0x40), // CMD_SET_DISP_START_LINE
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U8X8_C(0x28 | 0x4), // CMD_SET_POWER_CONTROL | 0x4
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U8X8_DLY(50),
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U8X8_C(0x28 | 0x6), // CMD_SET_POWER_CONTROL | 0x6
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U8X8_DLY(50),
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U8X8_C(0x28 | 0x7), // CMD_SET_POWER_CONTROL | 0x7
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U8X8_DLY(50),
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U8X8_C(0x20 | 0x6), // CMD_SET_RESISTOR_RATIO | 0x6
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U8X8_END_TRANSFER(),
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U8X8_END() // end of sequence
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};
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uint8_t u8x8_d_st756x_erc(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr) {
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/* call common procedure first and handle messages there */
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if (u8x8_d_st7565_common(u8x8, msg, arg_int, arg_ptr) == 0) {
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/* msg not handled, then try here */
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switch(msg){
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case U8X8_MSG_DISPLAY_SETUP_MEMORY:
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u8x8_d_helper_display_setup_memory(u8x8, &u8x8_st756x_128x64_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_st756x_erc_init_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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u8x8_cad_SendSequence(u8x8, u8x8_d_st7565_flip1_seq);
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u8x8->x_offset = u8x8->display_info->default_x_offset;
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} else {
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u8x8_cad_SendSequence(u8x8, u8x8_d_st7565_flip0_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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default:
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/* msg unknown */
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return 0;
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}
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}
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return 1;
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}
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void u8g2_Setup_st756x_erc(u8g2_t *u8g2, const u8g2_cb_t *rotation, u8x8_msg_cb byte_cb, u8x8_msg_cb gpio_and_delay_cb) {
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uint8_t tile_buf_height;
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uint8_t *buf;
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u8g2_SetupDisplay(u8g2, u8x8_d_st756x_erc, u8x8_cad_001, byte_cb, gpio_and_delay_cb);
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buf = u8g2_m_16_8_f(&tile_buf_height);
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u8g2_SetupBuffer(u8g2, buf, tile_buf_height, u8g2_ll_hvline_vertical_top_lsb, rotation);
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}
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