From 612b905d7dc704fb34fd9856aa3b3eedcf73c7d2 Mon Sep 17 00:00:00 2001
From: Marek Matej <marek.matej@espressif.com>
Date: Wed, 14 May 2025 12:54:46 +0200
Subject: [PATCH] samples: boards: espressif: extend SPIRAM test

Add byte, word, and dword test patterns to SPIRAM test.

Signed-off-by: Marek Matej <marek.matej@espressif.com>
---
 .../boards/espressif/spiram_test/src/main.c   | 63 ++++++++++++++++++-
 1 file changed, 60 insertions(+), 3 deletions(-)

diff --git a/samples/boards/espressif/spiram_test/src/main.c b/samples/boards/espressif/spiram_test/src/main.c
index dcd3bad8983..2638c6d36d8 100644
--- a/samples/boards/espressif/spiram_test/src/main.c
+++ b/samples/boards/espressif/spiram_test/src/main.c
@@ -9,13 +9,70 @@
 #include <soc/soc_memory_layout.h>
 #include <zephyr/multi_heap/shared_multi_heap.h>
 
+#define BUF_SIZE (4096*8)
+#define BYTE_PAT 0xa5
+#define WORD_PAT 0xaa55
+#define DWORD_PAT 0xaaaa5555
+
 int main(void)
 {
-	int *m_ext, *m_int;
+	uint32_t *m_ext, *m_int;
+	uint16_t *m_ext_w;
+	uint8_t *m_ext_b;
+	int err_b, err_w, err_dw;
+	int i;
 
-	m_ext = shared_multi_heap_aligned_alloc(SMH_REG_ATTR_EXTERNAL, 32, 4096);
+	m_ext = shared_multi_heap_aligned_alloc(SMH_REG_ATTR_EXTERNAL, 32, BUF_SIZE);
+	m_ext_b = (uint8_t *) m_ext;
+	m_ext_w = (uint16_t *) m_ext;
+	err_b = err_w = err_dw = 0;
 
-	if (!esp_ptr_external_ram(m_ext)) {
+	/* Byte access */
+	for (i = 0; i < BUF_SIZE; i++) {
+		m_ext_b[i] = BYTE_PAT;
+	}
+
+	for (i = 0; i < BUF_SIZE; i++) {
+		if (m_ext_b[i] != BYTE_PAT) {
+			err_b++;
+		}
+	}
+
+	if (err_b) {
+		printk("Byte access errors: %d\n", err_b);
+	}
+
+	/* Word access */
+	for (i = 0; i < BUF_SIZE / 2; i++) {
+		m_ext_w[i] = WORD_PAT;
+	}
+
+	for (i = 0; i < BUF_SIZE / 2; i++) {
+		if (m_ext_w[i] != WORD_PAT) {
+			err_w++;
+		}
+	}
+
+	if (err_w) {
+		printk("Word access errors: %d\n", err_w);
+	}
+
+	/* DWord access */
+	for (i = 0; i < BUF_SIZE / 4; i++) {
+		m_ext[i] = DWORD_PAT;
+	}
+
+	for (i = 0; i < BUF_SIZE / 4; i++) {
+		if (m_ext[i] != DWORD_PAT) {
+			err_dw++;
+		}
+	}
+
+	if (err_dw) {
+		printk("DWord access errors: %d\n", err_dw);
+	}
+
+	if (!esp_ptr_external_ram(m_ext) && !err_b && !err_w && !err_dw) {
 		printk("SPIRAM mem test failed\n");
 	} else {
 		printk("SPIRAM mem test pass\n");