hasslesstech
3766ddfdc1
Current implementation contains full support for: - transparent switching between direct and framebuffer rendering modes - writing characters to framebuffers - loading frame from memory to physical display As well as partial support for instruction writes including: - resetting the display (clears memory, sets cursor at 0:0, switches to increment mode) - switching between increment/decrement modes - setting cursor position
34 lines
996 B
C
34 lines
996 B
C
#ifndef __LCD
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#define __LCD
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#include <stdint.h>
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#define DISPLAY_RS ((uint16_t) (0x1U << 7))
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#define DISPLAY_RW ((uint16_t) (0x1U << 10))
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#define DISPLAY_ENA ((uint16_t) (0x1U << 11))
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#define DISPLAY_FRAMES_AVAILABLE 14
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#define DISPLAY_POLL_UNTIL_READY do { while (display_read_status() & 0x80) {} } while (0)
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#define DISPLAY_SET_INCREMENT do { display_write_instruction_byte(0x06); } while (0)
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#define DISPLAY_SET_DECREMENT do { display_write_instruction_byte(0x04); } while (0)
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#define DISPLAY_SET_CURSOR(line, position) do { display_write_instruction_byte(0x80 | (line << 6) | position); } while (0)
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#define DISPLAY_CLEAR do { display_write_instruction_byte(0x01); } while (0)
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struct Display_emu_state {
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size_t cursor_offset:5;
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size_t next:1;
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};
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void display_init(void);
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void display_write_instruction_byte(uint8_t code);
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void display_write_data_byte(uint8_t code);
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void display_write_data_seq(char *codes);
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void display_to_framebuffer(void);
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void display_to_direct(void);
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#endif
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