diff options
| -rw-r--r-- | tcl/target/pic32mx.cfg | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/tcl/target/pic32mx.cfg b/tcl/target/pic32mx.cfg index 0f1fa66c..d77c3a8c 100644 --- a/tcl/target/pic32mx.cfg +++ b/tcl/target/pic32mx.cfg @@ -18,14 +18,14 @@ if { [info exists CPUTAPID ] } { set _CPUTAPID 0x30938053 } -# working area is 16384 - 2048 -# loose first 2048 bytes due to BMXDKPBA reg +# default working area is 16384 if { [info exists WORKAREASIZE] } { set _WORKAREASIZE $WORKAREASIZE } else { - set _WORKAREASIZE [expr (16384 - 2048)] + set _WORKAREASIZE 0x4000 } + jtag_nsrst_delay 100 jtag_ntrst_delay 100 @@ -39,22 +39,35 @@ jtag newtap $_CHIPNAME cpu -irlen 5 -ircapture 0x1 -irmask 0x1f -expected-id $_C set _TARGETNAME $_CHIPNAME.cpu target create $_TARGETNAME mips_m4k -endian $_ENDIAN -chain-position $_TARGETNAME -$_TARGETNAME configure -work-area-phys 0xa0000800 -work-area-size $_WORKAREASIZE -work-area-backup 0 +# +# At reset the pic32mx does not allow code execution from RAM +# we have to setup the BMX registers to allow this. +# One limitation is that we loose the first 2k of RAM. +# + +global _PIC32MX_DATASIZE +global _PIC32MX_PROGSIZE +set _PIC32MX_DATASIZE 0x800 +set _PIC32MX_PROGSIZE [expr ($_WORKAREASIZE - $_PIC32MX_DATASIZE)] +$_TARGETNAME configure -work-area-phys 0xa0000800 -work-area-size $_PIC32MX_PROGSIZE -work-area-backup 0 $_TARGETNAME configure -event reset-init { # # from reset the pic32 cannot execute code in ram - enable ram execution # minimum offset from start of ram is 2k # + global _PIC32MX_DATASIZE + global _PIC32MX_PROGSIZE + # BMXCON mww 0xbf882000 0x001f0040 - # BMXDKPBA: 0xa0000800 - mww 0xbf882010 0x00000800 - # BMXDUDBA - mww 0xbf882020 0x00004000 - # BMXDUPBA - mww 0xbf882030 0x00004000 + # BMXDKPBA: 2k kernel data @ 0xa0000800 + mww 0xbf882010 $_PIC32MX_DATASIZE + # BMXDUDBA: 16k kernel program @ 0xa0000800 + mww 0xbf882020 $_PIC32MX_PROGSIZE + # BMXDUPBA: 0k user program + mww 0xbf882030 $_PIC32MX_PROGSIZE } set _FLASHNAME $_CHIPNAME.flash |