I have tested the SWJ support to STM32, implemented in vsprog. I'll then prepare to implement it in OpenOCD. Most operation is the same as JTAG, but DP accesses are not posted.
For multiple interface, I'll add a "swd_mode" command to select SWD interface. Add corresponding SWD driver. I find a patch about SWD support, but there is some BUG in the SWD implementation in that patch. SWJ interfaces functions: SWJ_SeqOut: used to output a sequence, eg: output JTAG_TO_SWD sequence SWJ_Transact: do the SWD RW operation SWJ interfaces parameters: SWJ_Trn: turnaround cycles, for STM32, default is 2 SWJ_Dly: delay in us for each bit Below is the vsprog log when programming STM32 through SWD: VSProg debug version (Oct 22 2009) MSVC express 2008 SP1:0000 CopyRight(c) 2008-2009 by SimonQian URL: http://www.SimonQian.com/en/Versaloon<http://www.simonqian.com/en/Versaloon> mail: __N/A__ Info: Versaloon(0x13)by Simon(compiled on Oct 24 2009) Warning:5 is invalid for hex type, current line ignored!! Info: VSLLink_20080905 by Simon(compiled on Oct 24 2009) Info: SWJ_ID read is 0x1BA01477. <<<<<<<<<<++++++++++ SWJ_ID ++++++++++>>>>>>>>>> Info: AHB-AP_ID: 0x14770011 Info: ROM_ADDRESS: 0xE00FF003 Info: CFG: 0x00000000, Small-endian Info: CORTEX-M3 processor detected Info: CPUID: 0x411FC231 Info: STM32 MCU_ID: 0x20016410 Info: STM32 revision: Z Info: STM32 type: medium-density device Info: STM32 flash_size: 32K Bytes Info: STM32 sram_size: 6K Bytes Info: Target halted. Info: erasing chip erasing chip |========================================%100| 0.03s used Info: chip erased Info: Target halted. Info: programming flash_loader writing flash_loader |========================================%100| 0.00s used Info: flash_loader programmed for 120bytes Info: verifying flash_loader reading flash_loader |========================================%100| 0.00s used Info: flash_loader verified for 120bytes Info: Target running. Info: programming flash writing flash |========================================%100| 0.52s used Info: flash programmed for 15456bytes Info: verifying flash reading flash |========================================%100| 0.36s used Info: flash verified for 15456bytes -- Best Regards, SimonQian http://www.SimonQian.com
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