From d00a6a30a2e020d629df2eec46840d6af247b607 Mon Sep 17 00:00:00 2001
From: Uwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de>
Date: Fri, 20 Jan 2012 17:25:01 +0100
Subject: [PATCH] F1 set_flash_cr_strt unconditionally set the PER bit and so
 mass erase didn't work

---
 src/stlink-common.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/stlink-common.c b/src/stlink-common.c
index 39a714b..b6e4a51 100644
--- a/src/stlink-common.c
+++ b/src/stlink-common.c
@@ -246,9 +246,9 @@ static void set_flash_cr_strt(stlink_t *sl) {
 		stlink_write_debug32(sl, FLASH_F4_CR, x);
 	}
 	else {
-		/* assume come on the flash_cr_per path */
-	    const uint32_t n = (1 << FLASH_CR_PER) | (1 << FLASH_CR_STRT);
-	    stlink_write_debug32(sl, FLASH_CR, n);
+	    stlink_write_debug32(
+                sl, FLASH_CR, 
+                stlink_read_debug32(sl,FLASH_CR) |(1 << FLASH_CR_STRT) );
 	}
 }
 
-- 
2.30.2