#include "u8g2_glue.h" #include #define CONTRAST_ERC 32 #define CONTRAST_MGG 28 uint8_t u8g2_gpio_and_delay_stm32(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr) { UNUSED(u8x8); UNUSED(arg_ptr); switch(msg) { case U8X8_MSG_GPIO_AND_DELAY_INIT: /* HAL initialization contains all what we need so we can skip this part. */ break; case U8X8_MSG_DELAY_MILLI: furi_delay_ms(arg_int); break; case U8X8_MSG_DELAY_10MICRO: furi_delay_us(10); break; case U8X8_MSG_DELAY_100NANO: asm("nop"); break; case U8X8_MSG_GPIO_RESET: furi_hal_gpio_write(&gpio_display_rst_n, arg_int); break; default: return 0; } return 1; } uint8_t u8x8_hw_spi_stm32(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr) { UNUSED(u8x8); switch(msg) { case U8X8_MSG_BYTE_SEND: furi_hal_spi_bus_tx(&furi_hal_spi_bus_handle_display, (uint8_t*)arg_ptr, arg_int, 10000); break; case U8X8_MSG_BYTE_SET_DC: furi_hal_gpio_write(&gpio_display_di, arg_int); break; case U8X8_MSG_BYTE_INIT: break; case U8X8_MSG_BYTE_START_TRANSFER: furi_hal_spi_acquire(&furi_hal_spi_bus_handle_display); break; case U8X8_MSG_BYTE_END_TRANSFER: furi_hal_spi_release(&furi_hal_spi_bus_handle_display); break; default: return 0; } return 1; } #define ST756X_CMD_ON_OFF 0b10101110 /**< 0:0 Switch Display ON/OFF: last bit */ #define ST756X_CMD_SET_LINE 0b01000000 /**< 0:0 Set Start Line: last 6 bits */ #define ST756X_CMD_SET_PAGE 0b10110000 /**< 0:0 Set Page address: last 4 bits */ #define ST756X_CMD_SET_COLUMN_MSB 0b00010000 /**< 0:0 Set Column MSB: last 4 bits */ #define ST756X_CMD_SET_COLUMN_LSB 0b00000000 /**< 0:0 Set Column LSB: last 4 bits */ #define ST756X_CMD_SEG_DIRECTION 0b10100000 /**< 0:0 Reverse scan direction of SEG: last bit */ #define ST756X_CMD_INVERSE_DISPLAY 0b10100110 /**< 0:0 Invert display: last bit */ #define ST756X_CMD_ALL_PIXEL_ON 0b10100100 /**< 0:0 Set all pixel on: last bit */ #define ST756X_CMD_BIAS_SELECT 0b10100010 /**< 0:0 Select 1/9(0) or 1/7(1) bias: last bit */ #define ST756X_CMD_R_M_W 0b11100000 /**< 0:0 Enter Read Modify Write mode: read+0, write+1 */ #define ST756X_CMD_END 0b11101110 /**< 0:0 Exit Read Modify Write mode */ #define ST756X_CMD_RESET 0b11100010 /**< 0:0 Software Reset */ #define ST756X_CMD_COM_DIRECTION 0b11000000 /**< 0:0 Com direction reverse: +0b1000 */ #define ST756X_CMD_POWER_CONTROL 0b00101000 /**< 0:0 Power control: last 3 bits VB:VR:VF */ #define ST756X_CMD_REGULATION_RATIO 0b00100000 /**< 0:0 Regulation resistor ration: last 3bits */ #define ST756X_CMD_SET_EV 0b10000001 /**< 0:0 Set electronic volume: 5 bits in next byte */ #define ST756X_CMD_SET_BOOSTER \ 0b11111000 /**< 0:0 Set Booster level, 4X(0) or 5X(1): last bit in next byte */ #define ST756X_CMD_NOP 0b11100011 /**< 0:0 No operation */ static const uint8_t u8x8_d_st756x_powersave0_seq[] = { U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */ U8X8_C(ST756X_CMD_ALL_PIXEL_ON | 0b0), /* all pixel off */ U8X8_C(ST756X_CMD_ON_OFF | 0b1), /* display on */ U8X8_END_TRANSFER(), /* disable chip */ U8X8_END() /* end of sequence */ }; static const uint8_t u8x8_d_st756x_powersave1_seq[] = { U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */ U8X8_C(ST756X_CMD_ON_OFF | 0b0), /* display off */ U8X8_C(ST756X_CMD_ALL_PIXEL_ON | 0b1), /* all pixel on */ U8X8_END_TRANSFER(), /* disable chip */ U8X8_END() /* end of sequence */ }; static const uint8_t u8x8_d_st756x_flip0_seq[] = { U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */ U8X8_C(0x0a1), /* segment remap a0/a1*/ U8X8_C(0x0c0), /* c0: scan dir normal, c8: reverse */ U8X8_END_TRANSFER(), /* disable chip */ U8X8_END() /* end of sequence */ }; static const uint8_t u8x8_d_st756x_flip1_seq[] = { U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */ U8X8_C(0x0a0), /* segment remap a0/a1*/ U8X8_C(0x0c8), /* c0: scan dir normal, c8: reverse */ U8X8_END_TRANSFER(), /* disable chip */ U8X8_END() /* end of sequence */ }; static const u8x8_display_info_t u8x8_st756x_128x64_display_info = { .chip_enable_level = 0, .chip_disable_level = 1, .post_chip_enable_wait_ns = 150, /* st7565 datasheet, table 26, tcsh */ .pre_chip_disable_wait_ns = 50, /* st7565 datasheet, table 26, tcss */ .reset_pulse_width_ms = 1, .post_reset_wait_ms = 1, .sda_setup_time_ns = 50, /* st7565 datasheet, table 26, tsds */ .sck_pulse_width_ns = 120, /* half of cycle time (100ns according to datasheet), AVR: below 70: 8 MHz, >= 70 --> 4MHz clock */ .sck_clock_hz = 4000000UL, /* since Arduino 1.6.0, the SPI bus speed in Hz. Should be 1000000000/sck_pulse_width_ns */ .spi_mode = 0, /* active high, rising edge */ .i2c_bus_clock_100kHz = 4, .data_setup_time_ns = 40, /* st7565 datasheet, table 24, tds8 */ .write_pulse_width_ns = 80, /* st7565 datasheet, table 24, tcclw */ .tile_width = 16, /* width of 16*8=128 pixel */ .tile_height = 8, .default_x_offset = 0, .flipmode_x_offset = 4, .pixel_width = 128, .pixel_height = 64}; uint8_t u8x8_d_st756x_common(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_DRAW_TILE: u8x8_cad_StartTransfer(u8x8); x = ((u8x8_tile_t*)arg_ptr)->x_pos; x *= 8; x += u8x8->x_offset; u8x8_cad_SendCmd(u8x8, 0x010 | (x >> 4)); u8x8_cad_SendCmd(u8x8, 0x000 | (x & 15)); u8x8_cad_SendCmd(u8x8, 0x0b0 | (((u8x8_tile_t*)arg_ptr)->y_pos)); c = ((u8x8_tile_t*)arg_ptr)->cnt; c *= 8; ptr = ((u8x8_tile_t*)arg_ptr)->tile_ptr; /* The following if condition checks the hardware limits of the st7565 controller: It is not allowed to write beyond the display limits. This is in fact an issue within flip mode. */ if(c + x > 132u) { c = 132u; c -= x; } 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; case U8X8_MSG_DISPLAY_SET_POWER_SAVE: if(arg_int == 0) u8x8_cad_SendSequence(u8x8, u8x8_d_st756x_powersave0_seq); else u8x8_cad_SendSequence(u8x8, u8x8_d_st756x_powersave1_seq); break; #ifdef U8X8_WITH_SET_CONTRAST case U8X8_MSG_DISPLAY_SET_CONTRAST: u8x8_cad_StartTransfer(u8x8); u8x8_cad_SendCmd(u8x8, ST756X_CMD_SET_EV); u8x8_cad_SendArg(u8x8, arg_int >> 2); /* st7565 has range from 0 to 63 */ u8x8_cad_EndTransfer(u8x8); break; #endif default: return 0; } return 1; } void u8x8_d_st756x_init(u8x8_t* u8x8, uint8_t contrast, uint8_t regulation_ratio, bool bias) { contrast = contrast & 0b00111111; regulation_ratio = regulation_ratio & 0b111; u8x8_cad_StartTransfer(u8x8); // Reset u8x8_cad_SendCmd(u8x8, ST756X_CMD_RESET); // Bias: 1/7(0b1) or 1/9(0b0) u8x8_cad_SendCmd(u8x8, ST756X_CMD_BIAS_SELECT | bias); // Page, Line and Segment config u8x8_cad_SendCmd(u8x8, ST756X_CMD_SEG_DIRECTION); u8x8_cad_SendCmd(u8x8, ST756X_CMD_COM_DIRECTION | 0b1000); u8x8_cad_SendCmd(u8x8, ST756X_CMD_SET_LINE); // Set Regulation Ratio u8x8_cad_SendCmd(u8x8, ST756X_CMD_REGULATION_RATIO | regulation_ratio); // Set EV u8x8_cad_SendCmd(u8x8, ST756X_CMD_SET_EV); u8x8_cad_SendArg(u8x8, contrast); // Enable power u8x8_cad_SendCmd(u8x8, ST756X_CMD_POWER_CONTROL | 0b111); u8x8_cad_EndTransfer(u8x8); } void u8x8_d_st756x_set_contrast(u8x8_t* u8x8, int8_t contrast_offset) { uint8_t contrast = (furi_hal_version_get_hw_display() == FuriHalVersionDisplayMgg) ? CONTRAST_MGG : CONTRAST_ERC; contrast += contrast_offset; contrast = contrast & 0b00111111; u8x8_cad_StartTransfer(u8x8); u8x8_cad_SendCmd(u8x8, ST756X_CMD_SET_EV); u8x8_cad_SendArg(u8x8, contrast); u8x8_cad_EndTransfer(u8x8); } uint8_t u8x8_d_st756x_flipper(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr) { /* call common procedure first and handle messages there */ if(u8x8_d_st756x_common(u8x8, msg, arg_int, arg_ptr) == 0) { /* msg not handled, then try here */ switch(msg) { case U8X8_MSG_DISPLAY_SETUP_MEMORY: u8x8_d_helper_display_setup_memory(u8x8, &u8x8_st756x_128x64_display_info); break; case U8X8_MSG_DISPLAY_INIT: u8x8_d_helper_display_init(u8x8); FuriHalVersionDisplay display = furi_hal_version_get_hw_display(); if(display == FuriHalVersionDisplayMgg) { /* MGG v0+(ST7567) * EV = 32 * RR = V0 / ((1 - (63 - EV) / 162) * 2.1) * RR = 10 / ((1 - (63 - 32) / 162) * 2.1) ~= 5.88 is 6 (0b110) * Bias = 1/9 (false) */ u8x8_d_st756x_init(u8x8, CONTRAST_MGG, 0b110, false); } else { /* ERC v1(ST7565) and v2(ST7567) * EV = 33 * RR = V0 / ((1 - (63 - EV) / 162) * 2.1) * RR = 9.3 / ((1 - (63 - 32) / 162) * 2.1) ~= 5.47 is 5.5 (0b101) * Bias = 1/9 (false) */ u8x8_d_st756x_init(u8x8, CONTRAST_ERC, 0b101, false); } break; case U8X8_MSG_DISPLAY_SET_FLIP_MODE: if(arg_int == 0) { u8x8_cad_SendSequence(u8x8, u8x8_d_st756x_flip1_seq); u8x8->x_offset = u8x8->display_info->default_x_offset; } else { u8x8_cad_SendSequence(u8x8, u8x8_d_st756x_flip0_seq); u8x8->x_offset = u8x8->display_info->flipmode_x_offset; } break; default: /* msg unknown */ return 0; } } return 1; } void u8g2_Setup_st756x_flipper( u8g2_t* u8g2, const u8g2_cb_t* rotation, u8x8_msg_cb byte_cb, u8x8_msg_cb gpio_and_delay_cb) { uint8_t tile_buf_height; uint8_t* buf; u8g2_SetupDisplay(u8g2, u8x8_d_st756x_flipper, u8x8_cad_001, byte_cb, gpio_and_delay_cb); buf = u8g2_m_16_8_f(&tile_buf_height); u8g2_SetupBuffer(u8g2, buf, tile_buf_height, u8g2_ll_hvline_vertical_top_lsb, rotation); }