Pic32mx.cfg: Change system clock to 8Mhz after reset-init.

As for openocd 0.6.0-rc2 the function mips32_pracc_fastdata_xfer()
should now work at a scan frequency up to 1200Khz.
Mainly usefull to increase programming speed.

Also verify_image should be slightly faster.

Change-Id: I1e9b2be73690a4597e2f6ba069c1205026850f07
Signed-off-by: Salvador Arroyo <sarroyofdez@yahoo.es>
Reviewed-on: http://openocd.zylin.com/805
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

diff --git a/tcl/target/pic32mx.cfg b/tcl/target/pic32mx.cfg
index 598c905cf49e4fdde71b3f9d70e0b2ceb6217247..8a8eea0ebc54660873a3fe8d021b0656f3d71974 100644 (file)
--- a/tcl/target/pic32mx.cfg
+++ b/tcl/target/pic32mx.cfg
@@ -62,6 +62,20 @@ $_TARGETNAME configure -event reset-init {
        mww 0xbf882020 $_WORKAREASIZE
        # BMXDUPBA: 0k user program - (BMXDUPBA - BMXDUDBA)
        mww 0xbf882030 $_WORKAREASIZE
+
+       #
+       # Set system clock to 8Mhz if the default clock configuration is set
+       #
+
+       # SYSKEY register, make sure OSCCON is locked
+       mww 0xbf80f230 0x0
+       # SYSKEY register, write unlock sequence
+       mww 0xbf80f230 0xaa996655
+       mww 0xbf80f230 0x556699aa
+       # OSCCON register + 4, clear OSCCON FRCDIV bits: 24, 25 and 26, divided by 1
+       mww 0xbf80f004 0x07000000
+       # SYSKEY register, relock OSCCON
+       mww 0xbf80f230 0x0
 }
 
 set _FLASHNAME $_CHIPNAME.flash0