samples: drivers: i2s/i2s_codec: support case on rt700

put __16kHz16bit_stereo_sine_pcm buffer into nocache region
Do some settings for rt700 cm33_cpu0 core

Signed-off-by: Lucien Zhao <[email protected]>

Author: lucien-nxp

samples/drivers/i2s/i2s_codec/boards/mimxrt700_evk_mimxrt798s_cm33_cpu0.conf

@@ -0,0 +1,11 @@
+#
+# Copyright 2025 NXP
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+CONFIG_HEAP_MEM_POOL_SIZE=81920
+CONFIG_AUDIO_CODEC=y
+CONFIG_DMA_TCD_QUEUE_SIZE=4
+CONFIG_SAMPLE_FREQ=16000
+CONFIG_USE_DMIC=n

samples/drivers/i2s/i2s_codec/boards/mimxrt700_evk_mimxrt798s_cm33_cpu0.overlay

@@ -0,0 +1,9 @@
+/*
+ * Copyright 2025 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&sai0 {
+	mclk-output;
+};

samples/drivers/i2s/i2s_codec/sample.yaml

@@ -6,6 +6,7 @@ tests:
     platform_allow:
       - mimxrt595_evk/mimxrt595s/cm33
       - mimxrt1170_evk@B/mimxrt1176/cm7
+      - mimxrt700_evk/mimxrt798s/cm33_cpu0
     harness: console
     harness_config:
       type: one_line

samples/drivers/i2s/i2s_codec/src/sine.h

@@ -7,6 +7,15 @@
  #ifndef SINE_H_
  #define SINE_H_
 
+#if CONFIG_NOCACHE_MEMORY
+#define __NOCACHE	__attribute__((__section__(".nocache")))
+#elif defined(CONFIG_DT_DEFINED_NOCACHE)
+#define __NOCACHE	__attribute__((__section__(CONFIG_DT_DEFINED_NOCACHE_NAME)))
+#else /* CONFIG_NOCACHE_MEMORY */
+#define __NOCACHE
+#endif /* CONFIG_NOCACHE_MEMORY */
+
+unsigned char __16kHz16bit_stereo_sine_pcm[] __NOCACHE;
 unsigned char __16kHz16bit_stereo_sine_pcm[] = {
 	0x00, 0x00, 0x00, 0x00, 0x08, 0x0b, 0x08, 0x0b, 0xbb, 0x15, 0xbb, 0x15, 0xc9, 0x1f, 0xc9,
 	0x1f, 0xe4, 0x28, 0xe4, 0x28, 0xc8, 0x30, 0xc8, 0x30, 0x38, 0x37, 0x38, 0x37, 0x03, 0x3c,

samples/drivers/i2s/output/boards/mimxrt700_evk_mimxrt798s_cm33_cpu0.conf

@@ -0,0 +1,2 @@
+# Raise DMA TCD Queue size, as this is required by the I2S SAI driver
+CONFIG_DMA_TCD_QUEUE_SIZE=4