STM32F103裸机实现30秒录音播放（无SD卡/无RTOS）
2026/10/17 11:53:55
见https://math.stackexchange.com/questions/1136352/numerical-integration-in-2d-over-a-triangle-quadrature-formula
Numerical integration in 2D over a triangle - Quadrature formula
见https://math.stackexchange.com/questions/1136352/numerical-integration-in-2d-over-a-triangle-quadrature-formula