sl-firmware
fa75c442a7
Archive STM32 firmware to legacy/stm32/: - src/, include/, lib/USB_CDC/, platformio.ini, test stubs, flash_firmware.py - test/test_battery_adc.c, test_hw_button.c, test_pid_schedule.c, test_vesc_can.c, test_can_watchdog.c - USB_CDC_BUG.md Rename: stm32_protocol → esp32_protocol, mamba_protocol → balance_protocol, stm32_cmd_node → esp32_cmd_node, stm32_cmd_params → esp32_cmd_params, stm32_cmd.launch.py → esp32_cmd.launch.py, test_stm32_protocol → test_esp32_protocol, test_stm32_cmd_node → test_esp32_cmd_node Content cleanup across all files: - Mamba F722S → ESP32-S3 BALANCE - BlackPill → ESP32-S3 IO - STM32F722/F7xx → ESP32-S3 - stm32Mode/Version/Port → esp32Mode/Version/Port - STM32 State/Mode labels → ESP32 State/Mode - Jetson Nano → Jetson Orin Nano Super - /dev/stm32 → /dev/esp32 - stm32_bridge → esp32_bridge - STM32 HAL → ESP-IDF docs/SALTYLAB.md: - Update "Drone FC Details" to describe ESP32-S3 BALANCE board (Waveshare ESP32-S3 Touch LCD 1.28) - Replace verbose "Self-Balancing Control" STM32 section with brief note pointing to SAUL-TEE-SYSTEM-REFERENCE.md TEAM.md: Update Embedded Firmware Engineer role to ESP32-S3 / ESP-IDF No new functionality — cleanup only. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
117 lines
3.5 KiB
C
117 lines
3.5 KiB
C
/*
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* face_lcd.h — STM32 LCD Display Driver for Face Animations
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*
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* Low-level abstraction for driving a small LCD/OLED display via SPI or I2C.
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* Supports pixel/line drawing primitives and full framebuffer operations.
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*
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* HOW IT WORKS:
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* - Initializes display (SPI/I2C, resolution, rotation)
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* - Provides framebuffer (in RAM or on-device)
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* - Exposes primitives: draw_pixel, draw_line, draw_circle, fill_rect
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* - Implements vsync-driven 30Hz refresh from systick
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* - Non-blocking DMA transfers for rapid display updates
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*
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* HARDWARE ASSUMPTIONS:
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* - SPI2 or I2C (configurable via #define LCD_INTERFACE)
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* - Typical sizes: 128×64, 240×135, 320×240
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* - Pixel depth: 1-bit (monochrome) or 16-bit (RGB565)
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* - Controller: SSD1306, ILI9341, ST7789, etc.
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*
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* API:
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* - face_lcd_init(width, height, bpp) — Initialize display
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* - face_lcd_clear() — Clear framebuffer
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* - face_lcd_pixel(x, y, color) — Set pixel
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* - face_lcd_line(x0, y0, x1, y1, color) — Draw line (Bresenham)
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* - face_lcd_circle(cx, cy, r, color) — Draw circle
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* - face_lcd_fill_rect(x, y, w, h, color) — Filled rectangle
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* - face_lcd_flush() — Push framebuffer to display (async via DMA)
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* - face_lcd_is_busy() — Check if transfer in progress
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* - face_lcd_tick() — Called by systick ISR for 30Hz vsync
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*/
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#ifndef FACE_LCD_H
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#define FACE_LCD_H
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#include <stdint.h>
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#include <stdbool.h>
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/* === Configuration === */
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#define LCD_INTERFACE SPI /* SPI or I2C */
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#define LCD_WIDTH 128 /* pixels */
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#define LCD_HEIGHT 64 /* pixels */
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#define LCD_BPP 1 /* bits per pixel (1=mono, 16=RGB565) */
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#define LCD_REFRESH_HZ 30 /* target refresh rate */
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#if LCD_BPP == 1
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typedef uint8_t lcd_color_t;
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#define LCD_BLACK 0x00
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#define LCD_WHITE 0x01
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#define LCD_FBSIZE (LCD_WIDTH * LCD_HEIGHT / 8) /* 1024 bytes */
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#else /* RGB565 */
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typedef uint16_t lcd_color_t;
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#define LCD_BLACK 0x0000
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#define LCD_WHITE 0xFFFF
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#define LCD_FBSIZE (LCD_WIDTH * LCD_HEIGHT * 2) /* 16384 bytes */
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#endif
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/* === Public API === */
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/**
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* Initialize LCD display and framebuffer.
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* Called once at startup.
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*/
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void face_lcd_init(void);
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/**
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* Clear entire framebuffer to black.
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*/
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void face_lcd_clear(void);
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/**
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* Set a single pixel in the framebuffer.
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* (Does NOT push to display immediately.)
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*/
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void face_lcd_pixel(uint16_t x, uint16_t y, lcd_color_t color);
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/**
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* Draw a line from (x0,y0) to (x1,y1) using Bresenham algorithm.
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*/
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void face_lcd_line(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1,
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lcd_color_t color);
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/**
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* Draw a circle with center (cx, cy) and radius r.
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*/
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void face_lcd_circle(uint16_t cx, uint16_t cy, uint16_t r, lcd_color_t color);
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/**
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* Fill a rectangle at (x, y) with width w and height h.
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*/
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void face_lcd_fill_rect(uint16_t x, uint16_t y, uint16_t w, uint16_t h,
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lcd_color_t color);
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/**
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* Push framebuffer to display (async via DMA if available).
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* Returns immediately; transfer happens in background.
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*/
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void face_lcd_flush(void);
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/**
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* Check if a display transfer is currently in progress.
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* Returns true if DMA/SPI is busy, false if idle.
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*/
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bool face_lcd_is_busy(void);
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/**
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* Called by systick ISR (~30Hz) to drive vsync and maintain refresh.
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* Updates frame counter and triggers flush if a new frame is needed.
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*/
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void face_lcd_tick(void);
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/**
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* Get framebuffer address (for direct access if needed).
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*/
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uint8_t *face_lcd_get_fb(void);
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#endif // FACE_LCD_H
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