# script for stm32f7x family # # stm32f7 devices support both JTAG and SWD transports. # source [find target/swj-dp.tcl] source [find mem_helper.tcl] if { [info exists CHIPNAME] } { set _CHIPNAME $CHIPNAME } else { set _CHIPNAME stm32f7x } set _ENDIAN little # Work-area is a space in RAM used for flash programming # By default use 128kB if { [info exists WORKAREASIZE] } { set _WORKAREASIZE $WORKAREASIZE } else { set _WORKAREASIZE 0x20000 } #jtag scan chain if { [info exists CPUTAPID] } { set _CPUTAPID $CPUTAPID } else { if { [using_jtag] } { # See STM Document RM0385 # Section 40.6.3 - corresponds to Cortex-M7 with FPU r0p0 set _CPUTAPID 0x5ba00477 } { set _CPUTAPID 0x5ba02477 } } swj_newdap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID dap create $_CHIPNAME.dap -chain-position $_CHIPNAME.cpu if {[using_jtag]} { jtag newtap $_CHIPNAME bs -irlen 5 } set _TARGETNAME $_CHIPNAME.cpu target create $_TARGETNAME cortex_m -endian $_ENDIAN -dap $_CHIPNAME.dap $_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE -work-area-backup 0 set _FLASHNAME $_CHIPNAME.flash flash bank $_FLASHNAME stm32f2x 0 0 0 0 $_TARGETNAME # adapter speed should be <= F_CPU/6. F_CPU after reset is 16MHz, so use F_JTAG = 2MHz adapter_khz 2000 adapter_nsrst_delay 100 if {[using_jtag]} { jtag_ntrst_delay 100 } # Use hardware reset. # # This target is compatible with connect_assert_srst, which may be set in a # board file. reset_config srst_only srst_nogate if {![using_hla]} { # if srst is not fitted use SYSRESETREQ to # perform a soft reset cortex_m reset_config sysresetreq # Set CSW[27], which according to ARM ADI v5 appendix E1.4 maps to AHB signal # HPROT[3], which according to AMBA AHB/ASB/APB specification chapter 3.7.3 # makes the data access cacheable. This allows reading and writing data in the # CPU cache from the debugger, which is far more useful than going straight to # RAM when operating on typical variables, and is generally no worse when # operating on special memory locations. $_CHIPNAME.dap apcsw 0x08000000 0x08000000 } $_TARGETNAME configure -event examine-end { # DBGMCU_CR |= DBG_STANDBY | DBG_STOP | DBG_SLEEP mmw 0xE0042004 0x00000007 0 # Stop watchdog counters during halt # DBGMCU_APB1_FZ |= DBG_IWDG_STOP | DBG_WWDG_STOP mmw 0xE0042008 0x00001800 0 } $_TARGETNAME configure -event trace-config { # Set TRACE_IOEN; TRACE_MODE is set to async; when using sync # change this value accordingly to configure trace pins # assignment mmw 0xE0042004 0x00000020 0 } $_TARGETNAME configure -event reset-init { # If the HSE was previously enabled and the external clock source # disappeared, RCC_CR.HSERDY can get stuck at 1 and the PLL cannot be # properly switched back to HSI. This situation persists even over a system # reset, including a pin reset via SRST. However, activating the clock # security system will detect the problem and clear HSERDY to 0, which in # turn allows the PLL to switch back to HSI properly. Since we just came # out of reset, HSEON should be 0. If HSERDY is 1, then this situation must # have happened; in that case, activate the clock security system to clear # HSERDY. if {[mrw 0x40023800] & 0x00020000} { mmw 0x40023800 0x00090000 0 ;# RCC_CR = CSSON | HSEON sleep 10 ;# Wait for CSS to fire, if it wants to mmw 0x40023800 0 0x00090000 ;# RCC_CR &= ~CSSON & ~HSEON mww 0x4002380C 0x00800000 ;# RCC_CIR = CSSC sleep 1 ;# Wait for CSSF to clear } # If the clock security system fired, it will pend an NMI. A pending NMI # will cause a bad time for any subsequent executing code, such as a # programming algorithm. if {[mrw 0xE000ED04] & 0x80000000} { # ICSR.NMIPENDSET reads as 1. Need to clear it. A pending NMI can’t be # cleared by any normal means (such as ICSR or NVIC). It can only be # cleared by entering the NMI handler or by resetting the processor. echo "[target current]: Clock security system generated NMI. Clearing." # Keep the old DEMCR value. set old [mrw 0xE000EDFC] # Enable vector catch on reset. mww 0xE000EDFC 0x01000001 # Issue local reset via AIRCR. mww 0xE000ED0C 0x05FA0001 # Restore old DEMCR value. mww 0xE000EDFC $old } # Configure PLL to boost clock to HSI x 10 (160 MHz) mww 0x40023804 0x08002808 ;# RCC_PLLCFGR 16 Mhz /10 (M) * 128 (N) /2(P) mww 0x40023C00 0x00000107 ;# FLASH_ACR = PRFTBE | 7(Latency) mmw 0x40023800 0x01000000 0 ;# RCC_CR |= PLLON sleep 10 ;# Wait for PLL to lock mww 0x40023808 0x00009400 ;# RCC_CFGR_PPRE1 = 5(div 4), PPRE2 = 4(div 2) mmw 0x40023808 0x00000002 0 ;# RCC_CFGR |= RCC_CFGR_SW_PLL # Boost SWD frequency # Do not boost JTAG frequency and slow down JTAG memory access or flash write algo # suffers from DAP WAITs if {[using_jtag]} { [[target current] cget -dap] memaccess 16 } { adapter_khz 8000 } } $_TARGETNAME configure -event reset-start { # Reduce speed since CPU speed will slow down to 16MHz with the reset adapter_khz 2000 }