108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
/*
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u8x8_display.c
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Abstraction layer for the graphics controller.
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Main goal is the placement of a 8x8 pixel block (tile) on the display.
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*/
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#include "u8x8.h"
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/*==========================================*/
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/* internal library function */
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/*
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this is a helper function for the U8X8_MSG_DISPLAY_SETUP_MEMORY function.
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It can be called within the display callback function to carry out the usual standard tasks.
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*/
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void u8x8_d_helper_display_setup_memory(u8x8_t *u8x8, const u8x8_display_info_t *display_info)
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{
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/* 1) set display info struct */
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u8x8->display_info = display_info;
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u8x8->x_offset = u8x8->display_info->default_x_offset;
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}
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/*
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this is a helper function for the U8X8_MSG_DISPLAY_INIT function.
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It can be called within the display callback function to carry out the usual standard tasks.
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*/
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void u8x8_d_helper_display_init(u8x8_t *u8x8)
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{
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/* 2) apply port directions to the GPIO lines and apply default values for the IO lines*/
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u8x8_gpio_Init(u8x8);
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u8x8_cad_Init(u8x8);
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/* 3) do reset */
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u8x8_gpio_SetReset(u8x8, 1);
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u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_MILLI, u8x8->display_info->reset_pulse_width_ms);
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u8x8_gpio_SetReset(u8x8, 0);
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u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_MILLI, u8x8->display_info->reset_pulse_width_ms);
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u8x8_gpio_SetReset(u8x8, 1);
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u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_MILLI, u8x8->display_info->post_reset_wait_ms);
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}
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/*==========================================*/
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/* official functions */
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uint8_t u8x8_display_DrawTile(u8x8_t *u8x8, uint8_t x, uint8_t y, uint8_t cnt, uint8_t *tile_ptr)
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{
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u8x8_tile_t tile;
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tile.x_pos = x;
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tile.y_pos = y;
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tile.cnt = cnt;
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tile.tile_ptr = tile_ptr;
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return u8x8->display_cb(u8x8, U8X8_MSG_DISPLAY_DRAW_TILE, 1, (void *)&tile);
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}
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/* should be implemented as macro */
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void u8x8_SetupMemory(u8x8_t *u8x8)
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{
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u8x8->display_cb(u8x8, U8X8_MSG_DISPLAY_SETUP_MEMORY, 0, NULL);
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}
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void u8x8_InitDisplay(u8x8_t *u8x8)
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{
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u8x8->display_cb(u8x8, U8X8_MSG_DISPLAY_INIT, 0, NULL);
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}
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void u8x8_SetPowerSave(u8x8_t *u8x8, uint8_t is_enable)
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{
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u8x8->display_cb(u8x8, U8X8_MSG_DISPLAY_SET_POWER_SAVE, is_enable, NULL);
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}
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void u8x8_SetFlipMode(u8x8_t *u8x8, uint8_t mode)
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{
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u8x8->display_cb(u8x8, U8X8_MSG_DISPLAY_SET_FLIP_MODE, mode, NULL);
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}
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void u8x8_display_SetContrast(u8x8_t *u8x8, uint8_t value)
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{
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u8x8->display_cb(u8x8, U8X8_MSG_DISPLAY_SET_CONTRAST, value, NULL);
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}
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void u8x8_display_ClearScreen(u8x8_t *u8x8)
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{
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uint8_t buf[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
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u8x8_tile_t tile;
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uint8_t h;
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tile.x_pos = 0;
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tile.cnt = 1;
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tile.tile_ptr = buf;
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h = u8x8->display_info->tile_height;
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tile.y_pos = 0;
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do
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{
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u8x8->display_cb(u8x8, U8X8_MSG_DISPLAY_DRAW_TILE, u8x8->display_info->tile_width, (void *)&tile);
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tile.y_pos++;
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} while( tile.y_pos < h );
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}
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