From aa38e5c1f48e31213ee349aa5cd6f06c85bda70d Mon Sep 17 00:00:00 2001
From: android <android@lingyun.com>
Date: Tue, 25 Jun 2024 21:49:39 +0800
Subject: [PATCH] Add GD32F103RCT6 ADC converter board SDK source code
---
mcu_sdk/gd32f103/rk_eFire/Board/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/TransformFunctions/dct4.c | 89 ++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 89 insertions(+), 0 deletions(-)
diff --git a/mcu_sdk/gd32f103/rk_eFire/Board/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/TransformFunctions/dct4.c b/mcu_sdk/gd32f103/rk_eFire/Board/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/TransformFunctions/dct4.c
new file mode 100644
index 0000000..9c1f207
--- /dev/null
+++ b/mcu_sdk/gd32f103/rk_eFire/Board/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/TransformFunctions/dct4.c
@@ -0,0 +1,89 @@
+#include "ref.h"
+
+void ref_dct4_f32(
+ const arm_dct4_instance_f32 * S,
+ float32_t * pState,
+ float32_t * pInlineBuffer)
+{
+ uint32_t n,k;
+ float32_t sum;
+ float32_t pi_by_N = 3.14159265358979f / (float32_t)S->N;
+ float32_t tmp;
+ float32_t normalize = sqrtf(2.0f / (float32_t)S->N);
+
+ for(k=0;k<S->N;k++)
+ {
+ sum=0.0f;
+ tmp = ((float32_t)k + 0.5f)*pi_by_N;
+ for(n=0;n<S->N;n++)
+ {
+ sum += pInlineBuffer[n] * cosf(tmp * ((float32_t)n + 0.5f));
+ }
+ scratchArray[k] = normalize * sum;
+ }
+
+ for(k=0;k<S->N;k++)
+ {
+ pInlineBuffer[k] = scratchArray[k];
+ }
+}
+
+void ref_dct4_q31(
+ const arm_dct4_instance_q31 * S,
+ q31_t * pState,
+ q31_t * pInlineBuffer)
+{
+ arm_dct4_instance_f32 SS;
+ float32_t *fSrc = (float32_t*)pInlineBuffer;
+ uint32_t i;
+
+ SS.N = S->N;
+
+ for(i=0;i<S->N;i++)
+ {
+ //read the q31 data, cast to float, scale down for float
+ fSrc[i] = (float32_t)pInlineBuffer[i] / 2147483648.0f;
+ }
+
+ ref_dct4_f32(&SS,(float32_t*)0,fSrc);
+
+ for(i=0;i<S->N;i++)
+ {
+ fSrc[i] = fSrc[i] * 2147483648.0f / (float32_t)S->N ;
+ fSrc[i] += (fSrc[i] > 0) ? 0.5f : -0.5f;
+ pInlineBuffer[i] = (q31_t)fSrc[i];
+ }
+}
+
+void ref_dct4_q15(
+ const arm_dct4_instance_q15 * S,
+ q15_t * pState,
+ q15_t * pInlineBuffer)
+{
+ arm_dct4_instance_f32 SS;
+ float32_t *fSrc = (float32_t*)pInlineBuffer;
+ uint32_t i;
+
+ SS.N = S->N;
+
+ for(i=0;i<S->N;i++)
+ {
+ //read the q15 data, cast to float, scale down for float, place in temporary buffer
+ scratchArray[i] = (float32_t)pInlineBuffer[i] / 32768.0f;
+ }
+
+ for(i=0;i<S->N;i++)
+ {
+ //copy from temp buffer to final buffer
+ fSrc[i] = scratchArray[i];
+ }
+
+ ref_dct4_f32(&SS,(float32_t*)0,fSrc);
+
+ for(i=0;i<S->N;i++)
+ {
+ fSrc[i] = fSrc[i] * 32768.0f / (float32_t)S->N;
+ fSrc[i] += (fSrc[i] > 0) ? 0.5f : -0.5f;
+ pInlineBuffer[i] = (q15_t)fSrc[i];
+ }
+}
--
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