87 lines
2.6 KiB
Python
87 lines
2.6 KiB
Python
import time
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from machine import UART
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from config import ttl_tx, ttl_rx
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from printer_driver import TsplPrinter
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def print_bitmap(printer, data, width, height, x_offset=0, y_offset=0, invert=False):
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"""
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发送位图数据到打印机
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:param printer: TsplPrinter 对象
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:param data: 位图数据 (bytes), 每一位代表一个像素 (1=print/黑, 0=no print/白)
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:param width: 图像宽度 (dots)
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:param height: 图像高度 (dots)
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:param x_offset: X轴偏移
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:param y_offset: Y轴偏移
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:param invert: 是否反色打印 (默认False)
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"""
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if invert:
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# 反转每一个字节
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data = bytearray([~b & 0xFF for b in data])
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width_bytes = (width + 7) // 8
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# TSPL BITMAP 指令
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# BITMAP x, y, width_bytes, height, mode, data
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# mode=0: 正常模式
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header = f"BITMAP {x_offset},{y_offset},{width_bytes},{height},0,".encode('utf-8')
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printer.uart.write(header)
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# 分段发送数据，防止串口缓冲区溢出
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chunk_size = 128
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for i in range(0, len(data), chunk_size):
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printer.uart.write(data[i : i + chunk_size])
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# 简单的流控，防止发送太快
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time.sleep(0.005)
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printer.uart.write(b'\r\n')
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def print_raw_image_file(file_path, width, height):
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"""
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直接打印存储在文件系统中的原始位图数据 (.bin)
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该文件应包含预处理好的二进制像素数据 (1 bit per pixel)
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:param file_path: 文件路径
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:param width: 图片宽度 (dots)
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:param height: 图片高度 (dots)
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"""
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try:
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with open(file_path, 'rb') as f:
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data = f.read()
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except OSError:
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print(f"错误: 无法打开文件 {file_path}")
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return
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# 初始化打印机
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uart = UART(1, baudrate=115200, tx=ttl_tx, rx=ttl_rx)
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printer = TsplPrinter(uart)
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print("=== 开始打印图片 ===")
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# 基础设置
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printer.cls()
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printer.size(48, 30) # 默认 48x30mm
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printer.gap(2, 0)
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# 计算居中位置 (假设标签纸最大宽度 384 dots, 高度 240 dots)
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MAX_WIDTH = 384
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MAX_HEIGHT = 240
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x_offset = (MAX_WIDTH - width) // 2
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y_offset = (MAX_HEIGHT - height) // 2
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if x_offset < 0: x_offset = 0
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if y_offset < 0: y_offset = 0
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print(f"正在发送图片数据 ({len(data)} bytes)...")
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print_bitmap(printer, data, width, height, x_offset, y_offset)
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# 打印出纸
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printer.print_out(1)
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print("打印完成")
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# 示例用法
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if __name__ == "__main__":
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# 假设有一个预处理好的 384x240 的二进制文件
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# print_raw_image_file("image_data.bin", 384, 240)
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pass
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