Hi, inspired by this post, I created a reset-init script that initializes the system clock for the STM32F107 (connectivity line) and sets the JTAG speed to 6 MHz.
<https://lists.berlios.de/pipermail/openocd-development/2010-October/016709.html> Currently, I source it in my custom configuration script, but it would be nice to have this included into to the OpenOCD distribution. source [find interface/arm-jtag-ew.cfg] source [find board/olimex_stm32_h107.cfg] source [find stm32f10x_cl_72MHz.cfg] init reset init This JTAG speed yields flash programming at 13.6 kb/s, and stepping is also pretty smooth. Some further benchmarks (OpenOCD compiled without any additional logging): @ 32 KHz: 1.9 kb/s @ 64 KHz: 3.4 kb/s @ 125 KHz: 5.6 kb/s @ 250 KHz: 8.1 kb/s @ 500 KHz: 10.2 kb/s @ 1MHz: 11.8 kb/s @ 2MHz: 12.9 kb/s @ 4MHz: 13.4 kb/s @ 6MHz: 13.6 kb/s Next, I will try out the async. write patch mentioned here: <https://lists.berlios.de/pipermail/openocd-development/2011-July/020261.html> (and related posts). Best regards, Simon
# Enable PLL2 and PLL (as in CMSIS system_stm32f10x.c) # and clock system with 72 Mhz # # Set JTAG clock to 6 MHz $_TARGETNAME configure -event reset-init { # RCC_CR reset value: 0x??83 # RCC_CR -> RCC_CR_HSEON mww 0x40021000 0x10083 sleep 10 # FLASH_ACR reset value: 0x30 # FLASH_ACR -> FLASH_ACR_PRFTBE, FLASH_ACR_LATENCY_2 mww 0x40022000 0x32 # RCC_CFGR reset value: 0x0 # RCC_CFGR -> RCC_CFGR_HPRE_DIV1, RCC_CFGR_PPRE2_DIV1, RCC_CFGR_PPRE1_DIV2 mww 0x40021004 0x400 # RCC_CFGR2 reset value: 0x0 # RCC_CFGR2 -> RCC_CFGR2_PREDIV2_DIV5, RCC_CFGR2_PLL2MUL8, # RCC_CFGR2_PREDIV1SRC_PLL2, RCC_CFGR2_PREDIV1_DIV5 mww 0x4002102c 0x10644 # RCC_CR -> RCC_CR_PLL2ON mww 0x40021000 0x4010083 sleep 10 # RCC_CFGR -> PLLCLK = PREDIV1 * 9 = 72 MHz mww 0x40021004 0x1d0400 # RCC_CR -> RCC_CR_PLLON mww 0x40021000 0x5010083 sleep 10 # RCC_CR -> RCC_CFGR_SW_PLL mww 0x40021004 0x1d0402 sleep 10 adapter_khz 6000 }
_______________________________________________ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development