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author | Salvador Arroyo <sarroyofdez@yahoo.es> | 2013-02-23 20:00:21 +0100 |
---|---|---|
committer | Spencer Oliver <spen@spen-soft.co.uk> | 2013-04-02 15:12:44 +0000 |
commit | 1d040adb0dd838f4d49b87573ee912d5bc917886 (patch) | |
tree | 8e44c50d2c18f628a96c9134346d866553063396 /src/helper/list.h | |
parent | c185a5b72437594a79894dccd7ef8851b5789307 (diff) |
pic32mx: 0 wait state option
By default pic32mx starts after any reset with 1 wait state for RAM access/exec.
It can be changed to 0 wait states by clearing the BMXWSDRM bit (bit 6) in BMXCON register.
With 0 wait states near doubles the execution speed. CRC check sum can be done much faster
increasing verify_image speed. Fast data transfer also works with a bit higher scan rate, up to 1500 Khz.
This option can be set at any time with
mww 0xbf882004 0x40
or cleared with
mww 0xbf882008 0x40.
Some numbers for FTDI/HS with current devel code and a elf file:
Core clock / wait states verify_image speed
------------------------------------|------------------------------
4 Mhz / 1 21 KiB/s
4 Mhz / 0 36 KiB/s
8 Mhz / 1 37 KiB/s
8 Mhz / 0 57 KiB/s
Change-Id: I4092ad0f3753f72f77108718d0ed3a3ab84e3b23
Signed-off-by: Salvador Arroyo <sarroyofdez@yahoo.es>
Reviewed-on: http://openocd.zylin.com/1141
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-by: Xiaofan <xiaofanc@gmail.com>
Diffstat (limited to 'src/helper/list.h')
0 files changed, 0 insertions, 0 deletions