diff options
Diffstat (limited to 'tcl')
| -rw-r--r-- | tcl/target/lpc1768.cfg | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/tcl/target/lpc1768.cfg b/tcl/target/lpc1768.cfg index ff92e4a7..07c5ab83 100644 --- a/tcl/target/lpc1768.cfg +++ b/tcl/target/lpc1768.cfg @@ -47,16 +47,18 @@ set _FLASHNAME $_CHIPNAME.flash flash bank $_FLASHNAME lpc2000 0x0 0x80000 0 0 $_TARGETNAME \ lpc1700 $_CCLK calc_checksum -# JTAG clock should be CCLK/6 (unless using adaptive clocking) -# CCLK is 4 MHz after reset, and until board-specific code (like -# a reset-init handler) speeds it up. -# # Although rclk "appears to work", it turns out that this yields # 4MHz whereas the "correct" rate is CCLK/6, which is not what # you get with rclk. -jtag_khz [ expr 4000 / 6 ] - - +# +# Also, crank down the frequency further as we're running of an +# RC oscillator instead of crystal. +# +# Setting up XTAL in the reset-init sequence could be worth +# the effort if you need to program the flash which is pretty +# big on these devices. +# +jtag_khz 100 $_TARGETNAME configure -event reset-init { # Do not remap 0x0000-0x0020 to anything but the flash (i.e. select |