From: A Sheaff <sheaff@traveler.eece.maine.edu>
Date: Wed, 9 Jan 2013 22:00:52 +0000 (-0500)
Subject: Clears DMA config registers for Discovery F4 board
X-Git-Url: https://git.gag.com/?a=commitdiff_plain;h=0ed3907;p=fw%2Fstlink

Clears DMA config registers for Discovery F4 board
to allow flash programming.  See texane/stlink issue #74.
---

diff --git a/flash/main.c b/flash/main.c
index 4716b66..1d616ae 100644
--- a/flash/main.c
+++ b/flash/main.c
@@ -123,6 +123,14 @@ int main(int ac, char** av)
   if (stlink_current_mode(sl) != STLINK_DEV_DEBUG_MODE)
     stlink_enter_swd_mode(sl);
 
+// Disable DMA - Set All DMA CCR Registers to zero. - AKS 1/7/2013
+    memset(sl->q_buf,0,4);
+	for (int i=0;i<8;i++) {
+	    stlink_write_mem32(sl,0x40026000+0x10+0x18*i,4);
+	    stlink_write_mem32(sl,0x40026400+0x10+0x18*i,4);
+	    stlink_write_mem32(sl,0x40026000+0x24+0x18*i,4);
+	    stlink_write_mem32(sl,0x40026400+0x24+0x18*i,4);
+	}
   if (o.cmd == DO_WRITE) /* write */
   {
     if ((o.addr >= sl->flash_base) &&