From bdd8c21fcfff8041ea94a972903ce42e58c2a5c2 Mon Sep 17 00:00:00 2001
From: ozpv <39195175+ozpv@users.noreply.github.com>
Date: Sat, 29 Aug 2026 23:04:49 -0500
Subject: add retain

---
 Core/Src/cs4272.c | 45 ++++++++++++---------------------------------
 1 file changed, 12 insertions(+), 33 deletions(-)

(limited to 'Core/Src/cs4272.c')

diff --git a/Core/Src/cs4272.c b/Core/Src/cs4272.c
index 9a7f0d1..8ba9885 100755
--- a/Core/Src/cs4272.c
+++ b/Core/Src/cs4272.c
@@ -8,18 +8,10 @@
 #include "i2c.h"
 #include "cs4272.h"
 #include "ringmod.h"
+#include "retain.h"
 
-const struct RingModParams params = {
-    0.40f,
-    156.0f,
-    6.90f,
-    0.18f,
-    true,
-};
-
-volatile int32_t rx_buffer[BUFFER_SIZE] __attribute__((section(".audio_buffers")));
-volatile int32_t tx_buffer[BUFFER_SIZE] __attribute__((section(".audio_buffers")));
-volatile float samples[BUFFER_SIZE] __attribute__((section(".sdram")));
+__attribute__((section(".audio_buffers"))) int32_t rx_buffer[BUFFER_SIZE];
+__attribute__((section(".audio_buffers"))) int32_t tx_buffer[BUFFER_SIZE];
 
 const uint8_t CS4272_CONFIG[7] = {
         /* MODE CONTROL 1
@@ -58,35 +50,22 @@ const uint8_t CS4272_CONFIG[7] = {
         0b00000010,
 };
 
-inline void int32_t_to_float(int32_t *in, float *out, const size_t range_min, const size_t range_max) {
-    for (size_t i = range_min; i < range_max; ++i) {
-        out[i] = ((float)(in[i] << 8)) / ((float)INT32_MAX);
-    }
-}
-
-inline void float_to_int32_t(float *in, int32_t *out, const size_t range_min, const size_t range_max) {
-    for (size_t i = range_min; i < range_max; ++i) {
-        out[i] = ((int32_t)(in[i] * ((float)INT32_MAX))) >> 8;
-    }
-}
+//const struct RingModParams params = {
+//    0.40f,
+//    156.0f,
+//    16.90f,
+//    0.18f,
+//    false,
+//};
 
 void HAL_SAI_RxHalfCpltCallback(SAI_HandleTypeDef *hsai) {
-    int32_t_to_float((int32_t *)rx_buffer, (float *)samples, 0, BUFFER_SIZE / 2);
-
-    ringmod((float *)samples, 0, BUFFER_SIZE / 2, &params);
-
-    float_to_int32_t((float *)samples, (int32_t *)tx_buffer, 0, BUFFER_SIZE / 2);
+    retain(rx_buffer, tx_buffer, 0, BUFFER_SIZE / 2, MONO);
 }
 
 void HAL_SAI_RxCpltCallback(SAI_HandleTypeDef *hsai) {
-    int32_t_to_float((int32_t *)rx_buffer, (float *)samples, BUFFER_SIZE / 2, BUFFER_SIZE);
-
-    ringmod((float *)samples, BUFFER_SIZE / 2, BUFFER_SIZE, &params);
-
-    float_to_int32_t((float *)samples, (int32_t *)tx_buffer, BUFFER_SIZE / 2, BUFFER_SIZE);
+    retain(rx_buffer, tx_buffer, BUFFER_SIZE / 2, BUFFER_SIZE, MONO);
 }
 
-
 HAL_StatusTypeDef CS4272_ReadRegister(const uint8_t addr, uint8_t *data) {
     return HAL_I2C_Mem_Read(&hi2c4, CS4272_I2C_ADDR, addr, I2C_MEMADD_SIZE_8BIT, data, 1, HAL_MAX_DELAY);
 }
-- 
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