From c2f69f4d1ee5108d325860f8b7cfb2c580ee3743 Mon Sep 17 00:00:00 2001
From: Charlie Birks <charlie@daft.games>
Date: Sun, 12 Jun 2022 16:55:44 +0100
Subject: [PATCH] stm32: simplify flash size calculation

Can't use the new header here (this is C code), but can definitly do better than something that expands to inline assembly
---
 32blit-stm32/Inc/quadspi.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/32blit-stm32/Inc/quadspi.h b/32blit-stm32/Inc/quadspi.h
index 81b7bd79a..3e9e69bfc 100644
--- a/32blit-stm32/Inc/quadspi.h
+++ b/32blit-stm32/Inc/quadspi.h
@@ -36,7 +36,7 @@ extern QSPI_HandleTypeDef hqspi;
 #define APPLICATION_ADDRESS                  QSPI_BASE
 
 // Flash example
-#define QSPI_FLASH_SIZE                      POSITION_VAL(0x2000000)-1
+#define QSPI_FLASH_SIZE                      __builtin_ctz(0x2000000)-1
 #define QSPI_PAGE_SIZE                       256
 
 /* Reset Operations */