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以下是一些常用的波形生成函数,适用于多种应用场景。这些函数可以根据需求进行参数调整,生成不同类型的波形。
int GenSineWave(int numElements, float64 amplitude, float64 frequency, float64 *phase, float64 *sineWave) { int i = 1; for(; i <= numElements; ++i) { sineWave[i-1] = amplitude * sin(PI/180.0 * (*phase + 360.0 * frequency * i)); } *phase = fmod(*phase + frequency * 360.0 * numElements, 360.0); return 0;} 注意:frequency = 1 / numElements。
int GenSquareWave(int numElements, float64 amplitude, float64 frequency, float64 *phase, float64 dutyCycle, float64 *squareWave) { int i = 0; for(; i < numElements; ++i) { float64 phase_i = fmod(*phase + 360.0 * frequency * i, 360.0); squareWave[i] = (phase_i / 360.0) <= dutyCycle / 100.0 ? amplitude : -amplitude; } *phase = fmod(*phase + frequency * 360.0 * numElements, 360.0); return 0;} int GenSawtoothWave(int numElements, float64 amplitude, float64 frequency, float64 *phase, float64 *sawtoothWave) { int i = 0; for(; i < numElements; ++i) { float64 phase_i = fmod(*phase + 360.0 * frequency * i, 360.0); float64 percentPeriod = phase_i / 360.0; float64 dat = amplitude * 2.0 * percentPeriod; sawtoothWave[i] = percentPeriod <= 0.5 ? dat : dat - 2.0 * amplitude; } *phase = fmod(*phase + frequency * 360.0 * numElements, 360.0); return 0;} int GenTriangleWave(int numElements, float64 amplitude, float64 frequency, float64 *phase, float64 *triangleWave) { int i = 0; for(; i < numElements; ++i) { float64 phase_i = fmod(*phase + 360.0 * frequency * i, 360.0); float64 percentPeriod = phase_i / 360.0; float64 dat = amplitude * 4.0 * percentPeriod; if (percentPeriod <= 0.25) { triangleWave[i] = dat; } else if (percentPeriod <= 0.75) { triangleWave[i] = 2.0 * amplitude - dat; } else { triangleWave[i] = dat - 4.0 * amplitude; } } *phase = fmod(*phase + frequency * 360.0 * numElements, 360.0); return 0;} 这些函数可以根据具体需求进行调整,例如改变频率、幅度和相位等参数,生成不同类型的波形。确保输入参数合理,避免超出范围。
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