feat: add some function

[PhoenixBit-AI]

add bitget and some function

[peter-jerry-ye-code-review]

Based on the provided git diff output, here are three potential issues or suggestions for improvement in the code changes:

1. Incorrect Function Call in set_draw_colors:

   • In the set_draw_colors function, the line let current_color = get_draw_colors(index) is changed to let current_color = load_u16(address_DRAW_COLORS). This change seems incorrect because it directly loads the value from memory without considering the index parameter. The original function call was correct as it retrieved the draw color at the specified index. The correct approach would be to use the get_draw_colors function to ensure the index is considered.

2. Bitwise Operation in get_draw_colors:

   • The get_draw_colors function has been modified to use a bitwise operation (bitget). This change seems appropriate as it correctly retrieves the draw color at the specified index. However, ensure that the bitget function implementation is correct and efficient for this purpose.

3. Range Check in get_frame_buffer:

   • The get_frame_buffer function includes a range check to ensure the index is within the valid range (0 to 160 * 160 - 1). This is a good practice to prevent out-of-bounds errors. However, consider adding a comment or error message that explicitly states the valid range, which helps other developers understand the constraints without needing to review the code.

Overall, the changes suggest improvements in memory management and bitwise operations, which are critical for performance and correctness in systems programming. However, the first issue with the incorrect function call in set_draw_colors needs to be addressed to maintain the intended functionality.