Here is a patch that helps against the well known OVERRUN errors for Cortex-M3 ( the problem is even worse for Cortex-A8 )
Basically the patch adds a fixed number ( default 8 ) of extra tck clocks before every DR scan that accesses the target memory bus through the DAP_MEMAP. This makes it possible to increase the jtag_khz, tested with JLink at 12MHz, improving total speed. Contents: + change signature for adi_jtag_dp_scan and adi_jtag_dp_scan_u32 to use swjdp_common_t *swjdp instead of arm_jtag_t *jtag_info + change SWJDP_IR/DR_APACC to DAP_IR/DR_APACC to conform with ARM_ADI docs. + add swjdp->memaccess_tck field and code for extra tck clocks before accessing memory bus + Set default memaccess value to 8 for Cortex-M3 + Add dap memaccess command Tested with STM32 andOMAP3530 for several weeks, no known problems. This should apply and build cleanly against trunk. Regards Magnus _______________________________________________ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development
