vibe-code wokwi display ch1115 integration

wokwi/Makefile

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+.PHONY: all auto native docker clean
+
+# Configuration
+SRC = ch1115.chip.c
+OUT = ch1115.chip.wasm
+
+# Check if wokwi-cli exists in PATH
+WOKWI_CLI := $(shell command -v wokwi-cli 2> /dev/null)
+
+HOST_UID := $(shell id -u)
+HOST_GID := $(shell id -g)
+
+# Default target runs the auto-detection
+all: auto
+
+auto:
+ifeq ($(WOKWI_CLI),)
+	@echo "wokwi-cli not found in PATH. Falling back to Docker build..."
+	$(MAKE) docker
+else
+	@echo "Found wokwi-cli at $(WOKWI_CLI). Using native build..."
+	$(MAKE) native
+endif
+
+native:
+	wokwi-cli chip compile $(SRC) -o $(OUT)
+
+docker:
+	docker run --rm -v $(CURDIR):/workspace -w /workspace ubuntu:latest \
+		bash -c "apt-get update && apt-get install -y --no-install-recommends curl ca-certificates && \
+		curl -L https://wokwi.com/ci/install.sh | sh && \
+		~/.wokwi/bin/wokwi-cli chip compile $(SRC) -o $(OUT) && \
+		chown $(HOST_UID):$(HOST_GID) $(OUT)"
+
+clean:
+	rm -f $(OUT)

wokwi/ch1115.chip.c

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+#include "wokwi-api.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+typedef struct {
+  pin_t cs, dc, res;
+  spi_dev_t spi;
+  buffer_t fb;
+  uint32_t width, height;
+  uint8_t spi_buffer[1];
+  uint8_t page;
+  uint8_t col;
+} chip_state_t;
+
+// Forward declarations
+static void on_cs_change(void *user_data, pin_t pin, uint32_t value);
+static void chip_spi_done(void *user_data, uint8_t *buffer, uint32_t count);
+
+void chip_init(void) {
+  printf("Initing CH1115 chip\n");
+  fflush(stdout);
+
+  chip_state_t *chip = malloc(sizeof(chip_state_t));
+  chip->fb = framebuffer_init(&chip->width, &chip->height);
+  
+  chip->cs = pin_init("CS", INPUT_PULLUP);
+  chip->dc = pin_init("DC", INPUT);
+  chip->res = pin_init("RES", INPUT_PULLUP);
+
+  const spi_config_t spi_cfg = {
+    .sck = pin_init("SCL", INPUT),
+    .mosi = pin_init("SDA", INPUT),
+    .miso = NO_PIN,
+    .mode = 0,
+    .done = chip_spi_done,
+    .user_data = chip,
+  };
+  chip->spi = spi_init(&spi_cfg);
+
+  const pin_watch_config_t cs_watch = {
+    .edge = BOTH,
+    .pin_change = on_cs_change,
+    .user_data = chip,
+  };
+  pin_watch(chip->cs, &cs_watch);
+}
+
+static void on_cs_change(void *user_data, pin_t pin, uint32_t value) {
+  chip_state_t *chip = (chip_state_t*)user_data;
+  if (value == LOW) {
+    // Start receiving 1 byte at a time
+    spi_start(chip->spi, chip->spi_buffer, 1);
+  } else {
+    spi_stop(chip->spi);
+  }
+}
+
+static void chip_spi_done(void *user_data, uint8_t *buffer, uint32_t count) {
+  chip_state_t *chip = (chip_state_t*)user_data;
+  if (!count) return;
+
+  uint8_t val = buffer[0];
+  bool is_data = pin_read(chip->dc) == HIGH;
+
+  if (is_data) {
+    // Write 8 vertical pixels to the Wokwi RGBA Framebuffer
+    for (int i = 0; i < 8; i++) {
+      // 0xFFFFFFFF = White, 0x000000FF = Black
+      uint32_t color = (val & (1 << i)) ? 0xFFFFFFFF : 0x000000FF; 
+      uint32_t y = (chip->page * 8) + i;
+      uint32_t offset = (y * chip->width + chip->col) * 4;
+      buffer_write(chip->fb, offset, &color, 4);
+    }
+    chip->col++; // Auto-increment column
+  } else {
+    // CH1115 Core Commands
+    if ((val & 0xB0) == 0xB0) chip->page = val & 0x0F; // Set Page Start
+    else if ((val & 0xF0) == 0x00) chip->col = (chip->col & 0xF0) | (val & 0x0F); // Lower Col
+    else if ((val & 0xF0) == 0x10) chip->col = (chip->col & 0x0F) | ((val & 0x0F) << 4); // Upper Col
+  }
+
+  // Continue receiving if CS is still active
+  if (pin_read(chip->cs) == LOW) {
+    spi_start(chip->spi, chip->spi_buffer, 1);
+  }
+}

wokwi/ch1115.chip.json

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+{
+  "name": "CH1115 OLED",
+  "author": "ede1998",
+  "pins": ["VCC", "GND", "CS", "RES", "DC", "SCL", "SDA"],
+  "display": {
+    "width": 128,
+    "height": 64
+  }
+}