Standard I/O Pins of the CMSIS-DAP Hardware Debug Port support standard JTAG mode and Serial Wire Debug (SWD) mode.
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static __inline void | PORT_JTAG_SETUP (void) |
| Setup JTAG I/O pins: TCK, TMS, TDI, TDO, nTRST, and nRESET.
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static __inline void | PORT_SWD_SETUP (void) |
| Setup SWD I/O pins: SWCLK, SWDIO, and nRESET.
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static __inline void | PORT_OFF (void) |
| Disable JTAG/SWD I/O Pins.
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static __forceinline uint32_t | PIN_SWCLK_TCK_IN (void) |
| SWCLK/TCK I/O pin: Get Input.
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static __forceinline void | PIN_SWCLK_TCK_SET (void) |
| SWCLK/TCK I/O pin: Set Output to High.
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static __forceinline void | PIN_SWCLK_TCK_CLR (void) |
| SWCLK/TCK I/O pin: Set Output to Low.
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static __forceinline uint32_t | PIN_SWDIO_TMS_IN (void) |
| SWDIO/TMS I/O pin: Get Input.
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static __forceinline void | PIN_SWDIO_TMS_SET (void) |
| SWDIO/TMS I/O pin: Set Output to High.
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static __forceinline void | PIN_SWDIO_TMS_CLR (void) |
| SWDIO/TMS I/O pin: Set Output to Low.
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static __forceinline uint32_t | PIN_SWDIO_IN (void) |
| SWDIO I/O pin: Get Input (used in SWD mode only).
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static __forceinline void | PIN_SWDIO_OUT (uint32_t bit) |
| SWDIO I/O pin: Set Output (used in SWD mode only).
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static __forceinline void | PIN_SWDIO_OUT_ENABLE (void) |
| SWDIO I/O pin: Switch to Output mode (used in SWD mode only).
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static __forceinline void | PIN_SWDIO_OUT_DISABLE (void) |
| SWDIO I/O pin: Switch to Input mode (used in SWD mode only).
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static __forceinline uint32_t | PIN_TDI_IN (void) |
| TDI I/O pin: Get Input.
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static __forceinline void | PIN_TDI_OUT (uint32_t bit) |
| TDI I/O pin: Set Output.
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static __forceinline uint32_t | PIN_TDO_IN (void) |
| TDO I/O pin: Get Input.
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static __forceinline uint32_t | PIN_nTRST_IN (void) |
| nTRST I/O pin: Get Input.
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static __forceinline void | PIN_nTRST_OUT (uint32_t bit) |
| nTRST I/O pin: Set Output.
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static __forceinline uint32_t | PIN_nRESET_IN (void) |
| nRESET I/O pin: Get Input.
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static __forceinline void | PIN_nRESET_OUT (uint32_t bit) |
| nRESET I/O pin: Set Output.
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Standard I/O Pins of the CMSIS-DAP Hardware Debug Port support standard JTAG mode and Serial Wire Debug (SWD) mode.
In SWD mode only 2 pins are required to implement the debug interface of a device. The following I/O Pins are provided:
JTAG I/O Pin | SWD I/O Pin | CMSIS-DAP Hardware pin mode |
TCK: Test Clock | SWCLK: Clock | Output Push/Pull |
TMS: Test Mode Select | SWDIO: Data I/O | Output Push/Pull; Input (for receiving data) |
TDI: Test Data Input | | Output Push/Pull |
TDO: Test Data Output | | Input |
nTRST: Test Reset (optional) | | Output Open Drain with pull-up resistor |
nRESET: Device Reset | nRESET: Device Reset | Output Open Drain with pull-up resistor |
DAP Hardware I/O Pin Access Functions
The various I/O Pins are accessed by functions that implement the Read, Write, Set, or Clear to these I/O Pins.
For the SWDIO I/O Pin there are additional functions that are called in SWD I/O mode only. This functions are provided to achieve faster I/O that is possible with some advanced GPIO peripherals that can independently write/read a single I/O pin without affecting any other pins of the same I/O port. The following SWDIO I/O Pin functions are provided:
static __forceinline uint32_t PIN_nRESET_IN |
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void |
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nRESET I/O pin: Get Input.
- Returns
- Current status of the nRESET DAP hardware I/O pin.
static __forceinline void PIN_nRESET_OUT |
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uint32_t |
bit | ) |
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static |
nRESET I/O pin: Set Output.
- Parameters
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bit | target device hardware reset pin status:
- 0: issue a device hardware reset.
- 1: release device hardware reset.
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static __forceinline uint32_t PIN_nTRST_IN |
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void |
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nTRST I/O pin: Get Input.
- Returns
- Current status of the nTRST DAP hardware I/O pin.
static __forceinline void PIN_nTRST_OUT |
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uint32_t |
bit | ) |
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static |
nTRST I/O pin: Set Output.
- Parameters
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bit | JTAG TRST Test Reset pin status:
- 0: issue a JTAG TRST Test Reset.
- 1: release JTAG TRST Test Reset.
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static __forceinline void PIN_SWCLK_TCK_CLR |
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void |
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SWCLK/TCK I/O pin: Set Output to Low.
Set the SWCLK/TCK DAP hardware I/O pin to low level.
static __forceinline uint32_t PIN_SWCLK_TCK_IN |
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void |
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SWCLK/TCK I/O pin: Get Input.
- Returns
- Current status of the SWCLK/TCK DAP hardware I/O pin.
static __forceinline void PIN_SWCLK_TCK_SET |
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void |
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SWCLK/TCK I/O pin: Set Output to High.
Set the SWCLK/TCK DAP hardware I/O pin to high level.
static __forceinline uint32_t PIN_SWDIO_IN |
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void |
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SWDIO I/O pin: Get Input (used in SWD mode only).
- Returns
- Current status of the SWDIO DAP hardware I/O pin.
static __forceinline void PIN_SWDIO_OUT |
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uint32_t |
bit | ) |
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static |
SWDIO I/O pin: Set Output (used in SWD mode only).
- Parameters
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bit | Output value for the SWDIO DAP hardware I/O pin. |
static __forceinline void PIN_SWDIO_OUT_DISABLE |
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void |
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SWDIO I/O pin: Switch to Input mode (used in SWD mode only).
Configure the SWDIO DAP hardware I/O pin to input mode. This function is called prior PIN_SWDIO_IN function calls.
static __forceinline void PIN_SWDIO_OUT_ENABLE |
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void |
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SWDIO I/O pin: Switch to Output mode (used in SWD mode only).
Configure the SWDIO DAP hardware I/O pin to output mode. This function is called prior PIN_SWDIO_OUT function calls.
static __forceinline void PIN_SWDIO_TMS_CLR |
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void |
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SWDIO/TMS I/O pin: Set Output to Low.
Set the SWDIO/TMS DAP hardware I/O pin to low level.
static __forceinline uint32_t PIN_SWDIO_TMS_IN |
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void |
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SWDIO/TMS I/O pin: Get Input.
- Returns
- Current status of the SWDIO/TMS DAP hardware I/O pin.
static __forceinline void PIN_SWDIO_TMS_SET |
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void |
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SWDIO/TMS I/O pin: Set Output to High.
Set the SWDIO/TMS DAP hardware I/O pin to high level.
static __forceinline uint32_t PIN_TDI_IN |
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void |
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TDI I/O pin: Get Input.
- Returns
- Current status of the TDI DAP hardware I/O pin.
static __forceinline void PIN_TDI_OUT |
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uint32_t |
bit | ) |
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TDI I/O pin: Set Output.
- Parameters
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bit | Output value for the TDI DAP hardware I/O pin. |
static __forceinline uint32_t PIN_TDO_IN |
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void |
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TDO I/O pin: Get Input.
- Returns
- Current status of the TDO DAP hardware I/O pin.
static __inline void PORT_JTAG_SETUP |
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void |
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Setup JTAG I/O pins: TCK, TMS, TDI, TDO, nTRST, and nRESET.
Configures the DAP Hardware I/O pins for JTAG mode:
- TCK, TMS, TDI, nTRST, nRESET to output mode and set to high level.
- TDO to input mode.
static __inline void PORT_OFF |
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void |
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Disable JTAG/SWD I/O Pins.
Disables the DAP Hardware I/O pins which configures:
- TCK/SWCLK, TMS/SWDIO, TDI, TDO, nTRST, nRESET to High-Z mode.
static __inline void PORT_SWD_SETUP |
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void |
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Setup SWD I/O pins: SWCLK, SWDIO, and nRESET.
Configures the DAP Hardware I/O pins for Serial Wire Debug (SWD) mode:
- SWCLK, SWDIO, nRESET to output mode and set to default high level.
- TDI, nTRST to HighZ mode (pins are unused in SWD mode).