diff options
Diffstat (limited to 'examples/4_fir_pro.cpp')
| -rw-r--r-- | examples/4_fir_pro.cpp | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/examples/4_fir_pro.cpp b/examples/4_fir_pro.cpp index b1a6832..1771cd5 100644 --- a/examples/4_fir_pro.cpp +++ b/examples/4_fir_pro.cpp @@ -10,7 +10,7 @@ typedef struct static void arm_fir_f32(const arm_fir_instance_f32 * S, float32_t * pSrc, float32_t * pDst, uint32_t blockSize); -Sample *process_data(Samples samples) +Sample* process_data(Samples samples) { // 1. Define our array sizes (Be sure to set Run > Set buffer size... to below value!) constexpr unsigned int buffer_size = 500; @@ -34,18 +34,18 @@ Sample *process_data(Samples samples) static float working[buffer_size + filter_size]; // 3. Scale 0-4095 interger sample values to +/- 1.0 floats - for (unsigned int i = 0; i < samples.size(); i++) + for (unsigned int i = 0; i < SIZE; i++) input[i] = (samples[i] - 2048) / 2048.f; // 4. Compute the FIR arm_fir_instance_f32 fir { filter_size, working, filter }; - arm_fir_f32(&fir, input, output, samples.size()); + arm_fir_f32(&fir, input, output, SIZE); // 5. Convert float results back to 0-4095 range for output - for (unsigned int i = 0; i < samples.size(); i++) + for (unsigned int i = 0; i < SIZE; i++) samples[i] = output[i] * 2048.f + 2048; - return samples.data(); + return samples; } // Below taken from the CMSIS DSP Library (find it on GitHub) |