From 94a6dc08d838d78eaf96c91f380e5c0fed3c1484 Mon Sep 17 00:00:00 2001
From: embeddedt <42941056+embeddedt@users.noreply.github.com>
Date: Mon, 21 Sep 2020 18:05:06 -0400
Subject: [PATCH] Check for a Cortex-M7 before calling cache functions (#1806)

---
 src/lv_gpu/lv_gpu_stm32_dma2d.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/lv_gpu/lv_gpu_stm32_dma2d.c b/src/lv_gpu/lv_gpu_stm32_dma2d.c
index f11c4c6a4..4fca9c322 100644
--- a/src/lv_gpu/lv_gpu_stm32_dma2d.c
+++ b/src/lv_gpu/lv_gpu_stm32_dma2d.c
@@ -219,8 +219,11 @@ static void invalidate_cache(void)
 {
     lv_disp_t * disp = _lv_refr_get_disp_refreshing();
     if(disp->driver.clean_dcache_cb) disp->driver.clean_dcache_cb(&disp->driver);
-    else
+    else {
+#if __CORTEX_M >= 0x07
         SCB_CleanInvalidateDCache();
+#endif
+    }
 }
 
 static void dma2d_wait(void)