[Openocd-development] Clock setup script for STM32F107
Dear list, I have already posted the attached script some weeks ago. It enables the PLL of the STM32F107 and thus configures the MCU to run at 72 MHz which allows for higher JTAG speeds. Since this should be useful for everybody, I would like to contribute it to OpenOCD. However, I am not sure how to integrate it. One idea is to conditionally call it from scripts/target /stm32f1x.cfg. Comments and alternative suggestions are highly appreciated. 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
Re: [Openocd-development] Clock setup script for STM32F107
Am 10/09/2011 12:37 PM, schrieb Simon Barner: > Dear list, > > I have already posted the attached script some weeks ago. > > It enables the PLL of the STM32F107 and thus configures > the MCU to run at 72 MHz which allows for higher JTAG speeds. > > Since this should be useful for everybody, I would like to > contribute it to OpenOCD. However, I am not sure how to integrate > it. One idea is to conditionally call it from scripts/target > /stm32f1x.cfg. Comments and alternative suggestions are highly > appreciated. How about moving this to a function that can be called from the board config file? cu Michael ___ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development
Re: [Openocd-development] Clock setup script for STM32F107
On Sun, Oct 9, 2011 at 12:37 PM, Simon Barner wrote: > Dear list, > > I have already posted the attached script some weeks ago. > > It enables the PLL of the STM32F107 and thus configures > the MCU to run at 72 MHz which allows for higher JTAG speeds. > > Since this should be useful for everybody, I would like to > contribute it to OpenOCD. However, I am not sure how to integrate > it. One idea is to conditionally call it from scripts/target > /stm32f1x.cfg. Comments and alternative suggestions are highly > appreciated. > First of all, it's better to run off of the HSI instead. Not everyone has a crystal attached, or it could be another frequency. For example, I have this in my config files (for STM32F103, I don't know what differs): $_TARGETNAME configure -event reset-init { mww 0x40022000 0x32 mww 0x40021004 0x3c0400 mww 0x40021000 0x01000883 sleep 10 mww 0x40021004 0x3c0402 sleep 10 adapter_khz 3000 } As Michael said, it's probably best to put in in a tcl procedure that the user can choose to call from the reset-init hook. Don't put the adapter_khz in that procedure. If the settings are the same for all devices in the family, the procedure probably belongs in target/stm32f1x.cfg. /Andreas ___ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development