libjaylink/libjaylink/jtag.c File Reference

JTAG functions. More...

Include dependency graph for libjaylink/libjaylink/jtag.c:

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Functions
JAYLINK_API int	jaylink_jtag_clear_trst (struct jaylink_device_handle *devh)
	Clear the JTAG test reset (TRST) signal. More...
JAYLINK_API int	jaylink_jtag_io (struct jaylink_device_handle *devh, const uint8_t *tms, const uint8_t *tdi, uint8_t *tdo, uint16_t length, enum jaylink_jtag_version version)
	Perform a JTAG I/O operation. More...
JAYLINK_API int	jaylink_jtag_set_trst (struct jaylink_device_handle *devh)
	Set the JTAG test reset (TRST) signal. More...

Detailed Description

JTAG functions.

Definition in file libjaylink/libjaylink/jtag.c.

Function Documentation

jaylink_jtag_clear_trst()

JAYLINK_API int jaylink_jtag_clear_trst

(

struct jaylink_device_handle *

devh

)

Clear the JTAG test reset (TRST) signal.

Parameters

[in,out]

devh

Device handle.

Return values

JAYLINK_OK	Success.
JAYLINK_ERR_ARG	Invalid arguments.
JAYLINK_ERR_TIMEOUT	A timeout occurred.
JAYLINK_ERR_IO	Input/output error.
JAYLINK_ERR	Other error conditions.

Since

0.1.0

Definition at line 186 of file libjaylink/libjaylink/jtag.c.

References jaylink_device::ctx, jaylink_device_handle::dev, JAYLINK_ERR_ARG, JAYLINK_OK, jaylink_strerror(), log_err(), transport_start_write(), and transport_write().

Referenced by jlink_reset().

jaylink_jtag_io()

JAYLINK_API int jaylink_jtag_io	(	struct jaylink_device_handle *	devh,
		const uint8_t *	tms,
		const uint8_t *	tdi,
		uint8_t *	tdo,
		uint16_t	length,
		enum jaylink_jtag_version	version
	)

Perform a JTAG I/O operation.

Note

This function must only be used if the JAYLINK_TIF_JTAG interface is available and selected. Nevertheless, this function can be used if the device doesn't have the JAYLINK_DEV_CAP_SELECT_TIF capability.

Parameters

[in,out]	devh	Device handle.
[in]	tms	Buffer to read TMS data from.
[in]	tdi	Buffer to read TDI data from.
[out]	tdo	Buffer to store TDO data on success. Its content is undefined on failure. The buffer must be large enough to contain at least the specified number of bits to transfer.
[in]	length	Number of bits to transfer.
[in]	version	Version of the JTAG command to use.

Return values

JAYLINK_OK	Success.
JAYLINK_ERR_ARG	Invalid arguments.
JAYLINK_ERR_TIMEOUT	A timeout occurred.
JAYLINK_ERR_IO	Input/output error.
JAYLINK_ERR_DEV_NO_MEMORY	Not enough memory on the device to perform the operation.
JAYLINK_ERR_DEV	Unspecified device error.
JAYLINK_ERR	Other error conditions.

See also

jaylink_select_interface()

jaylink_set_speed()

Since

0.1.0

Definition at line 75 of file libjaylink/libjaylink/jtag.c.

References buffer_set_u16(), jaylink_device::ctx, jaylink_device_handle::dev, JAYLINK_ERR_ARG, JAYLINK_ERR_DEV, JAYLINK_ERR_DEV_NO_MEMORY, JAYLINK_JTAG_VERSION_2, JAYLINK_JTAG_VERSION_3, JAYLINK_OK, jaylink_strerror(), log_err(), transport_read(), transport_start_write_read(), and transport_write().

Referenced by jlink_flush().

jaylink_jtag_set_trst()

JAYLINK_API int jaylink_jtag_set_trst

(

struct jaylink_device_handle *

devh

)

Set the JTAG test reset (TRST) signal.

Parameters

[in,out]

devh

Device handle.

Return values

JAYLINK_OK	Success.
JAYLINK_ERR_ARG	Invalid arguments.
JAYLINK_ERR_TIMEOUT	A timeout occurred.
JAYLINK_ERR_IO	Input/output error.
JAYLINK_ERR	Other error conditions.

Since

0.1.0

Definition at line 230 of file libjaylink/libjaylink/jtag.c.

References jaylink_device::ctx, jaylink_device_handle::dev, JAYLINK_ERR_ARG, JAYLINK_OK, jaylink_strerror(), log_err(), transport_start_write(), and transport_write().

Referenced by jlink_reset().