kopia lustrzana https://github.com/stlink-org/stlink
Merge pull request #851 from olikraus/master
added several comments on the stlink software structurepull/866/head
Nightwalker-87
GitHub
commit
39dc7db763
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=== Target Identification ===
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The following information is available about the target:
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- chip id: 0xE0042000 or 0x40015800, primary information to derive flash and sram architection
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- core id: Result from the STLINK_DEBUGREADCOREID call, additionally used for flash/sram architection
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- cpu id: 0xE000ED00 (CMSIS System Control Block CPU ID), not used in stlink
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=== Backend ===
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The "backend" implements the interface to the adapter hardware.
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There are two backends for two different adapters: "sg" (stlink v1?) and "usb" (stlink v2?).
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Include stlink/backend.h
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typedef struct _stlink_backend {
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void (*close) (stlink_t * sl);
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int (*exit_debug_mode) (stlink_t * sl);
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int (*enter_swd_mode) (stlink_t * sl);
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int (*enter_jtag_mode) (stlink_t * stl);
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int (*exit_dfu_mode) (stlink_t * stl);
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int (*core_id) (stlink_t * stl);
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int (*reset) (stlink_t * stl);
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int (*jtag_reset) (stlink_t * stl, int value);
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int (*run) (stlink_t * stl);
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int (*status) (stlink_t * stl);
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int (*version) (stlink_t *sl);
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int (*read_debug32) (stlink_t *sl, uint32_t addr, uint32_t *data);
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int (*read_mem32) (stlink_t *sl, uint32_t addr, uint16_t len);
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int (*write_debug32) (stlink_t *sl, uint32_t addr, uint32_t data);
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int (*write_mem32) (stlink_t *sl, uint32_t addr, uint16_t len);
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int (*write_mem8) (stlink_t *sl, uint32_t addr, uint16_t len);
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int (*read_all_regs) (stlink_t *sl, struct stlink_reg * regp);
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int (*read_reg) (stlink_t *sl, int r_idx, struct stlink_reg * regp);
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int (*read_all_unsupported_regs) (stlink_t *sl, struct stlink_reg *regp);
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int (*read_unsupported_reg) (stlink_t *sl, int r_idx, struct stlink_reg *regp);
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int (*write_unsupported_reg) (stlink_t *sl, uint32_t value, int idx, struct stlink_reg *regp);
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int (*write_reg) (stlink_t *sl, uint32_t reg, int idx);
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int (*step) (stlink_t * stl);
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int (*current_mode) (stlink_t * stl);
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int (*force_debug) (stlink_t *sl);
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int32_t (*target_voltage) (stlink_t *sl);
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int (*set_swdclk) (stlink_t * stl, uint16_t divisor);
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} stlink_backend_t;
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Descriptions below describe the actions of the usb.h backend:
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void (*close) (stlink_t * sl);
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int (*exit_debug_mode) (stlink_t * sl);
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__stlink_usb_exit_debug_mode: Send STLINK_DEBUG_EXIT
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returns -1 or 0
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int (*enter_swd_mode) (stlink_t * sl);
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_stlink_usb_enter_swd_mode: Send STLINK_DEBUG_ENTER+STLINK_DEBUG_ENTER_SWD
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returns -1 or 0
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int (*enter_jtag_mode) (stlink_t * stl);
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int (*exit_dfu_mode) (stlink_t * stl);
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_stlink_usb_exit_dfu_mode: Send STLINK_DFU_EXIT
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returns -1 or 0
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int (*core_id) (stlink_t * stl);
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_stlink_usb_core_id: Assign the result from STLINK_DEBUG_READCOREID to stl->core_id
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returns -1 or 0
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int (*reset) (stlink_t * stl);
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_stlink_usb_reset: Send STLINK_DEBUG_RESETSYS and reset via AIRCR
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AIRCR is part of the CMSIS System Control Block (SCB), which is located in
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the System Control Space at 0xE000ED0C
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returns -1 or 0 ?
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int (*jtag_reset) (stlink_t * stl, int value);
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_stlink_usb_jtag_reset: Send STLINK_JTAG_DRIVE_NRST.
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"value" is sent as argument for STLINK_JTAG_DRIVE_NRST and probably contains
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the status of the NRST line (0: low, 1: high). Also the value 2 is used in the software.
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returns -1 or 0
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int (*run) (stlink_t * stl);
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_stlink_usb_run: Send STLINK_DEBUG_RUNCORE
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returns -1 or 0
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int (*status) (stlink_t * stl);
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_stlink_usb_status: Assign the result from STLINK_DEBUG_GETSTATUS to stl->q_len
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returns -1 or 0
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int (*version) (stlink_t *sl);
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_stlink_usb_version: Read version with STLINK_GET_VERSION.
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Result is stored in sl->q_buf (6 bytes????)
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returns -1 or 0
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int (*read_debug32) (stlink_t *sl, uint32_t addr, uint32_t *data);
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_stlink_usb_read_debug32: Send STLINK_JTAG_READDEBUG_32BIT
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to read 32 bits from "addr". The result data is stored at "*data".
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returns -1 or 0
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int (*read_mem32) (stlink_t *sl, uint32_t addr, uint16_t len);
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_stlink_usb_read_mem32: Use STLINK_DEBUG_READMEM_32BIT
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to read "len" bytes from "addr"
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Result is returned in sl->q_buf, sl->q_len returns the size of the data (should be
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equal to "len"???).
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returns -1 or 0
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int (*write_debug32) (stlink_t *sl, uint32_t addr, uint32_t data);
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_stlink_usb_write_debug32: Use STLINK_JTAG_WRITEDEBUG_32BIT
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to store "data" at "addr"
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returns -1 or 0
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int (*write_mem32) (stlink_t *sl, uint32_t addr, uint16_t len);
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_stlink_usb_write_mem32: Use STLINK_DEBUG_WRITEMEM_32BIT to
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send data stored in sl->q_buf to the target at "addr".
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"len" is the size data (???? not clear whether this are bytes )
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returns -1 or 0
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int (*write_mem8) (stlink_t *sl, uint32_t addr, uint16_t len);
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_stlink_usb_write_mem8: Use STLINK_DEBUG_WRITEMEM_8BIT to
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send data stored in sl->q_buf to the target at "addr".
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"len" is the size in bytes (probably).
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returns -1 or 0
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int (*read_all_regs) (stlink_t *sl, struct stlink_reg * regp);
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_stlink_usb_read_all_regs: Send STLINK_DEBUG_READALLREGS to read
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all register values and store them into *regp;
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returns -1 or 0
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int (*read_reg) (stlink_t *sl, int r_idx, struct stlink_reg * regp);
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_stlink_usb_read_reg: Send STLINK_DEBUG_READREG to read specific register "r_idx".
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The result is then stored in *regp in the correct register.
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Example if "r_idx" is 18, then the result is stored in regp->process_sp
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returns -1 or 0
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int (*read_all_unsupported_regs) (stlink_t *sl, struct stlink_reg *regp);
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_stlink_usb_read_all_unsupported_regs: Calls "_stlink_usb_read_unsupported_reg"
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(see below) to read all registers.
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returns -1 or 0
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int (*read_unsupported_reg) (stlink_t *sl, int r_idx, struct stlink_reg *regp);
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_stlink_usb_read_unsupported_reg Use DCRSR and DCRDR to access some
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of the internal registers (primask, basepri, faultmask, control, fpscr).
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Also will fill regp->s (???) for some specific "r_idx" values.
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WARNING: Some r_idx values may lead to a out of array bound problem in C.
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returns -1 or 0
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int (*write_unsupported_reg) (stlink_t *sl, uint32_t value, int idx, struct stlink_reg *regp);
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_stlink_usb_write_unsupported_reg:
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Updates one of the following registers:
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primask (idx=0x1c), basepri (idx=0x1d), faultmask (idx=0x1e), control (idx=0x1f)
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The new value is given as "value" as fn argument.
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Corresponding values are refreshed in regp, however the old value for is kept in regp:
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If basepri has to be updated (idx=0x1d), then all register values are fetched and
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basepri is updated in the core, but not in *regp (BUG???).
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returns -1 or 0
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int (*write_reg) (stlink_t *sl, uint32_t reg, int idx);
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_stlink_usb_write_reg: Use STLINK_DEBUG_WRITEREG to update register "idx"
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with value "reg".
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returns -1 or 0
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int (*step) (stlink_t * stl);
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_stlink_usb_step: Send STLINK_DEBUG_STEPCORE
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returns -1 or 0
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int (*current_mode) (stlink_t * stl);
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_stlink_usb_current_mode: Send STLINK_GET_CURRENT_MODE and return
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the current mode.
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returns -1 or the value for the current mode.
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Modes probably are:
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STLINK_DEV_DFU_MODE 0x00
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STLINK_DEV_MASS_MODE 0x01
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STLINK_DEV_DEBUG_MODE 0x02
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int (*force_debug) (stlink_t *sl);
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_stlink_usb_force_debug: Sends STLINK_DEBUG_FORCEDEBUG. No other side effects
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returns -1 or 0
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int32_t (*target_voltage) (stlink_t *sl);
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_stlink_usb_target_voltage: Send STLINK_GET_TARGET_VOLTAGE
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returns -1 or the target voltage. (??? dimension is not clear...)
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int (*set_swdclk) (stlink_t * stl, uint16_t divisor);
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_stlink_usb_set_swdclk: Send STLINK_DEBUG_APIV2_SWD_SET_FREQ and "divisor" value
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returns -1 or 0
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=== Other Functions ===
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Include: stlink.h
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Prototype: void stlink_close(stlink_t *sl);
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Include: inc/stlink.h
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Definition: src/common.c
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Description:
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Calls the backend "close" procedure and frees 'sl'
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Backend: "close"
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Arguments:
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sl: Pointer to the stlink data structure, returned by stlink_v1_open() or stlink_open_usb()
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Return: -
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Include: inc/stlink.h
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Prototype: int stlink_core_id(stlink_t *sl);
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Definition: src/common.c
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Description:
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Calls the backend "core_id", calls stlink_print_data() on higher verbose levels.
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Assigns the core id returned by STLINK_DEBUGREADCOREID to sl->core_id
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Only some specific core ids are used: See include/stm32.h
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Usage includes the selection of the correct flash algorithm.
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Backend: "core_id"
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Arguments:
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sl: Pointer to the stlink data structure, returned by stlink_v1_open() or stlink_open_usb()
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Return: -1 for error. 0 for success.
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Include: inc/stlink.h
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Prototype: int stlink_reset(stlink_t *sl);
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Definition: src/common.c
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Description:
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Just calls the backend "reset" procedure (reset via STLINK_DEBUG_RESETSYS
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and reset via AIRCR register at 0xE000ED0C)
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Backend: "reset"
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Arguments:
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sl: Pointer to the stlink data structure, returned by stlink_v1_open() or stlink_open_usb()
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Return: -1 for error. 0 for success.
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Include: inc/stlink.h
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Prototype: int stlink_jtag_reset(stlink_t *sl, int value);
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Definition: src/common.c
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Description:
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Just calls the backend "jtag_reset" procedure
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Backend: "jtag_reset"
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Arguments:
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sl: Pointer to the stlink data structure, returned by stlink_v1_open() or stlink_open_usb()
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value: 0: drive low, 1: drive high, 2: ????
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Return: -1 for error. 0 for success.
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Include: inc/stlink.h
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Prototype: int stlink_run(stlink_t *sl);
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Definition: src/common.c
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Description:
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Just calls the backend "run" procedure.
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Backend: "run"
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Arguments:
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sl: Pointer to the stlink data structure, returned by stlink_v1_open() or stlink_open_usb()
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Return: -1 for error. 0 for success.
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Include: inc/stlink.h
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Prototype: int stlink_status(stlink_t *sl);
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Definition: src/common.c
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Description:
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Calls the backend "status" procedure and the procedure "stlink_core_stat()" to
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store the status in "sl->core_stat". Possible value for "sl->core_stat" are:
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STLINK_CORE_RUNNING
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STLINK_CORE_HALTED
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STLINK_CORE_STAT_UNKNOWN
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Backend: "status"
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Arguments:
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sl: Pointer to the stlink data structure, returned by stlink_v1_open() or stlink_open_usb()
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Return: -1 for error. 0 for success.
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Include: inc/stlink.h
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Prototype: int stlink_version(stlink_t *sl);
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Definition: src/common.c
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Description:
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Calls the backend "version" procedure, parses the result and puts the result into sl->version
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This version probably refers to the version of the adapter.
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Backend: "version"
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Arguments:
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sl: Pointer to the stlink data structure, returned by stlink_v1_open() or stlink_open_usb()
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Return: -1 for error. 0 for success.
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int stlink_read_debug32(stlink_t *sl, uint32_t addr, uint32_t *data);
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int stlink_read_mem32(stlink_t *sl, uint32_t addr, uint16_t len);
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int stlink_write_debug32(stlink_t *sl, uint32_t addr, uint32_t data);
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int stlink_write_mem32(stlink_t *sl, uint32_t addr, uint16_t len);
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int stlink_write_mem8(stlink_t *sl, uint32_t addr, uint16_t len);
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int stlink_read_all_regs(stlink_t *sl, struct stlink_reg *regp);
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int stlink_read_all_unsupported_regs(stlink_t *sl, struct stlink_reg *regp);
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int stlink_read_reg(stlink_t *sl, int r_idx, struct stlink_reg *regp);
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int stlink_read_unsupported_reg(stlink_t *sl, int r_idx, struct stlink_reg *regp);
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int stlink_write_unsupported_reg(stlink_t *sl, uint32_t value, int r_idx, struct stlink_reg *regp);
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int stlink_write_reg(stlink_t *sl, uint32_t reg, int idx);
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int stlink_step(stlink_t *sl);
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int stlink_current_mode(stlink_t *sl);
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int stlink_force_debug(stlink_t *sl);
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int stlink_target_voltage(stlink_t *sl);
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int stlink_set_swdclk(stlink_t *sl, uint16_t divisor);
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int stlink_erase_flash_mass(stlink_t* sl);
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int stlink_write_flash(stlink_t* sl, stm32_addr_t address, uint8_t* data, uint32_t length, uint8_t eraseonly);
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int stlink_parse_ihex(const char* path, uint8_t erased_pattern, uint8_t * * mem, size_t * size, uint32_t * begin);
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uint8_t stlink_get_erased_pattern(stlink_t *sl);
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int stlink_mwrite_flash(stlink_t *sl, uint8_t* data, uint32_t length, stm32_addr_t addr);
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int stlink_fwrite_flash(stlink_t *sl, const char* path, stm32_addr_t addr);
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int stlink_fwrite_option_bytes(stlink_t *sl, const char* path, stm32_addr_t addr);
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int stlink_fwrite_option_bytes_32bit(stlink_t *sl,uint32_t val);
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int stlink_mwrite_sram(stlink_t *sl, uint8_t* data, uint32_t length, stm32_addr_t addr);
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int stlink_fwrite_sram(stlink_t *sl, const char* path, stm32_addr_t addr);
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int stlink_verify_write_flash(stlink_t *sl, stm32_addr_t address, uint8_t *data, uint32_t length);
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Include: inc/stlink.h
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Prototype: int stlink_chip_id(stlink_t *sl, uint32_t *chip_id);
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Definition: src/common.c
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Description:
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Tries to read out the chip id via memory read from the device.
|
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Note: sl->chip_id is NOT updated by this procedure. Instead this happens in stlink_load_device_params():
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Do not call this function, but instead call stlink_load_device_params()
|
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Backend: -
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Arguments:
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sl: Pointer to the stlink data structure, returned by stlink_v1_open() or stlink_open_usb()
|
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chip_id: Pointer. Result is stored via this pointer.
|
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Return: -1 for error. 0 for success.
|
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Include: inc/stlink.h
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Prototype: int stlink_cpu_id(stlink_t *sl, cortex_m3_cpuid_t *cpuid);
|
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Definition: src/common.c
|
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Description:
|
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Reads the CPU id from STLINK_REG_CM3_CPUID (0xE000ED00, first value of
|
||||
the SCB, system control block) and splits this into
|
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cpuid->implementer_id
|
||||
cpuid->variant
|
||||
cpuid->part
|
||||
cpuid->revision
|
||||
The result is not used in the tools, but only in the usb test program.
|
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Backend: -
|
||||
Arguments:
|
||||
sl: Pointer to the stlink data structure, returned by stlink_v1_open() or stlink_open_usb()
|
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cpuid: Pointer. Result is stored via this pointer.
|
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Return: -1 for error. 0 for success.
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|
||||
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||||
|
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|
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int stlink_erase_flash_page(stlink_t* sl, stm32_addr_t flashaddr);
|
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uint32_t stlink_calculate_pagesize(stlink_t *sl, uint32_t flashaddr);
|
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uint16_t read_uint16(const unsigned char *c, const int pt);
|
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void stlink_core_stat(stlink_t *sl);
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||||
|
||||
|
||||
Include: inc/stlink.h
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Prototype: void stlink_print_data(stlink_t *sl);
|
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Definition: src/common.c
|
||||
Description:
|
||||
If debug logging is enabled: Print the HEX content of the q_buf array.
|
||||
q_buf will contain the result of the last "backend" command.
|
||||
Backend: -
|
||||
Arguments:
|
||||
sl: Pointer to the stlink data structure, returned by stlink_v1_open() or stlink_open_usb()
|
||||
Return: -
|
||||
|
||||
|
||||
unsigned int is_bigendian(void);
|
||||
uint32_t read_uint32(const unsigned char *c, const int pt);
|
||||
void write_uint32(unsigned char* buf, uint32_t ui);
|
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void write_uint16(unsigned char* buf, uint16_t ui);
|
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bool stlink_is_core_halted(stlink_t *sl);
|
||||
int write_buffer_to_sram(stlink_t *sl, flash_loader_t* fl, const uint8_t* buf, size_t size);
|
||||
int write_loader_to_sram(stlink_t *sl, stm32_addr_t* addr, size_t* size);
|
||||
int stlink_fread(stlink_t* sl, const char* path, bool is_ihex, stm32_addr_t addr, size_t size);
|
||||
|
||||
|
||||
Include: inc/stlink.h
|
||||
Prototype: int stlink_load_device_params(stlink_t *sl);
|
||||
Definition: src/common.c
|
||||
Description:
|
||||
This is one of the most important procedures. It will get all the device info
|
||||
and store the results in the "sl" structure. Many other procedures will depend
|
||||
on this information.
|
||||
The identification is based on the stlink_chip_id() result and the flash_size register value
|
||||
Backend: -
|
||||
Arguments:
|
||||
sl: Pointer to the stlink data structure, returned by stlink_v1_open() or stlink_open_usb()
|
||||
Return: -1 for error. 0 for success.
|
||||
|
||||
int stlink_read_option_bytes_f2(stlink_t *sl, uint32_t* option_byte);
|
||||
int stlink_read_option_bytes_f4(stlink_t *sl, uint32_t* option_byte);
|
||||
|
||||
|
||||
Include "flash_loader.h"
|
||||
|
||||
int stlink_flash_loader_init(stlink_t *sl, flash_loader_t* fl);
|
||||
int stlink_flash_loader_write_to_sram(stlink_t *sl, stm32_addr_t* addr, size_t* size);
|
||||
int stlink_flash_loader_run(stlink_t *sl, flash_loader_t* fl, stm32_addr_t target, const uint8_t* buf, size_t size);
|
||||
|
||||
|
||||
Inlcude "sg.h"
|
||||
stlink_t* stlink_v1_open(const int verbose, int reset);
|
||||
|
||||
Include "usb.h"
|
||||
|
||||
stlink_t *stlink_open_usb(enum ugly_loglevel verbose, bool reset, char serial[STLINK_SERIAL_MAX_SIZE]);
|
||||
size_t stlink_probe_usb(stlink_t **stdevs[]);
|
||||
void stlink_probe_usb_free(stlink_t **stdevs[], size_t size);
|
||||
|
|
@ -142,25 +142,27 @@ typedef struct flash_loader {
|
|||
|
||||
// transport layer verboseness: 0 for no debug info, 10 for lots
|
||||
int verbose;
|
||||
uint32_t core_id;
|
||||
uint32_t chip_id;
|
||||
int core_stat;
|
||||
uint32_t core_id; // set by stlink_core_id(), result from STLINK_DEBUGREADCOREID
|
||||
uint32_t chip_id; // set by stlink_load_device_params(), used to identify flash and sram
|
||||
int core_stat; // set by stlink_status(), values STLINK_CORE_xxxxx
|
||||
|
||||
char serial[STLINK_SERIAL_MAX_SIZE];
|
||||
int serial_size;
|
||||
|
||||
enum stlink_flash_type flash_type;
|
||||
stm32_addr_t flash_base;
|
||||
size_t flash_size;
|
||||
size_t flash_pgsz;
|
||||
enum stlink_flash_type flash_type; // stlink_chipid_params.flash_type, set by stlink_load_device_params(), values: STLINK_FLASH_TYPE_xxx
|
||||
stm32_addr_t flash_base; // STM32_FLASH_BASE, set by stlink_load_device_params()
|
||||
size_t flash_size; // calculated by stlink_load_device_params()
|
||||
size_t flash_pgsz; // stlink_chipid_params.flash_pagesize, set by stlink_load_device_params()
|
||||
|
||||
/* sram settings */
|
||||
stm32_addr_t sram_base;
|
||||
size_t sram_size;
|
||||
stm32_addr_t sram_base; // STM32_SRAM_BASE, set by stlink_load_device_params()
|
||||
size_t sram_size; // stlink_chipid_params.sram_size, set by stlink_load_device_params()
|
||||
|
||||
// bootloader
|
||||
stm32_addr_t sys_base;
|
||||
size_t sys_size;
|
||||
// sys_base and sys_size are not used by the tools, but are only there to
|
||||
// download the bootloader code (see tests/sg.c)
|
||||
stm32_addr_t sys_base; // stlink_chipid_params.bootrom_base, set by stlink_load_device_params()
|
||||
size_t sys_size; // stlink_chipid_params.bootrom_size, set by stlink_load_device_params()
|
||||
|
||||
struct stlink_version_ version;
|
||||
};
|
||||
|
|
|
|||
|
|
@ -748,6 +748,8 @@ int stlink_core_id(stlink_t *sl) {
|
|||
return ret;
|
||||
}
|
||||
|
||||
// stlink_chip_id() is called by stlink_load_device_params()
|
||||
// do not call this procedure directly.
|
||||
int stlink_chip_id(stlink_t *sl, uint32_t *chip_id) {
|
||||
int ret;
|
||||
|
||||
|
|
@ -801,7 +803,7 @@ int stlink_load_device_params(stlink_t *sl) {
|
|||
sl->chip_id = 0x413;
|
||||
}
|
||||
|
||||
params = stlink_chipid_get_params(sl->chip_id);
|
||||
params = stlink_chipid_get_params(sl->chip_id); // chipid.c
|
||||
if (params == NULL) {
|
||||
WLOG("unknown chip id! %#x\n", chip_id);
|
||||
return -1;
|
||||
|
|
@ -1134,6 +1136,9 @@ void stlink_run_at(stlink_t *sl, stm32_addr_t addr) {
|
|||
usleep(3000000);
|
||||
}
|
||||
|
||||
|
||||
// this function is called by stlink_status()
|
||||
// do not call stlink_core_stat() directly, always use stlink_status()
|
||||
void stlink_core_stat(stlink_t *sl) {
|
||||
if (sl->q_len <= 0)
|
||||
return;
|
||||
|
|
|
|||
Ładowanie…
Reference in New Issue