uhd::rfnoc::multichan_register_iface Class Reference

#include <uhd/rfnoc/multichan_register_iface.hpp>

Public Types
using	sptr = std::shared_ptr< multichan_register_iface >

Public Member Functions
	multichan_register_iface (register_iface_holder &reg_iface_holder, const uint32_t block_base_addr, const size_t block_size)
	~multichan_register_iface ()=default
void	poke32 (uint32_t addr, uint32_t data, const size_t instance=0, uhd::time_spec_t time=uhd::time_spec_t::ASAP, bool ack=false)
void	poke64 (uint32_t addr, uint64_t data, const size_t instance=0, time_spec_t time=uhd::time_spec_t::ASAP, bool ack=false)
void	multi_poke32 (const std::vector< uint32_t > addrs, const std::vector< uint32_t > data, const size_t instance=0, uhd::time_spec_t time=uhd::time_spec_t::ASAP, bool ack=false)
void	block_poke32 (uint32_t first_addr, const std::vector< uint32_t > data, const size_t instance=0, uhd::time_spec_t time=uhd::time_spec_t::ASAP, bool ack=false)
uint32_t	peek32 (uint32_t addr, const size_t instance=0, time_spec_t time=uhd::time_spec_t::ASAP)
uint64_t	peek64 (uint32_t addr, const size_t instance=0, time_spec_t time=uhd::time_spec_t::ASAP)
std::vector< uint32_t >	block_peek32 (uint32_t first_addr, size_t length, const size_t instance=0, time_spec_t time=uhd::time_spec_t::ASAP)
void	poll32 (uint32_t addr, uint32_t data, uint32_t mask, time_spec_t timeout, const size_t instance=0, time_spec_t time=uhd::time_spec_t::ASAP, bool ack=false)

Detailed Description

A software interface to access low-level registers in a NoC block, which automatically handles address translation between multiple consecutive instances of the block. (For instance, accessing registers from multiple channels in hardware).

This interface supports the following:

• Writing and reading registers
• Hardware timed delays (for time sequencing operations)

Member Typedef Documentation

sptr

using uhd::rfnoc::multichan_register_iface::sptr = std::shared_ptr<multichan_register_iface>

Constructor & Destructor Documentation

multichan_register_iface()

uhd::rfnoc::multichan_register_iface::multichan_register_iface ( register_iface_holder &  reg_iface_holder, const uint32_t  block_base_addr, const size_t  block_size  )

inline

~multichan_register_iface()

uhd::rfnoc::multichan_register_iface::~multichan_register_iface ( )

default

Member Function Documentation

block_peek32()

std::vector< uint32_t > uhd::rfnoc::multichan_register_iface::block_peek32 ( uint32_t  first_addr, size_t  length, const size_t  instance = 0, time_spec_t  time = uhd::time_spec_t::ASAP  )

inline

Read multiple 32-bit consecutive registers implemented in the NoC block.

Parameters

first_addr	The byte address of the first register to read from (truncated to 20 bits).
length	The number of 32-bit values to read
instance	The index of the block of registers to which the reads apply.
time	The time at which the transaction should be executed.

Returns

data New value of this register.

Example: If first_addr is set to 0, and length is 8, then this function will return a vector of length 8, with the content of registers at addresses 0, 4, 8, 12, 16, 20, 24, and 28 respectively.

Note: There is no guarantee that under the hood, the implementation won't separate the reads.

Exceptions

op_failed	if the transaction fails
op_timeout	if no response is received
op_seqerr	if a sequence error occurs

block_poke32()

void uhd::rfnoc::multichan_register_iface::block_poke32 ( uint32_t  first_addr, const std::vector< uint32_t >  data, const size_t  instance = 0, uhd::time_spec_t  time = uhd::time_spec_t::ASAP, bool  ack = false  )

inline

Write multiple consecutive 32-bit registers implemented in the NoC block.

This function will only allow writes to adjacent registers, in increasing order. If addr is set to 0, and the length of data is 8, then this method triggers eight writes, in order, to addresses 0, 4, 8, 12, 16, 20, 24, 28. For arbitrary addresses, cf. multi_poke32().

Note: There is no guarantee that under the hood, the implementation won't separate the writes.

Parameters

first_addr	The byte addresses of the first register to write
data	New values of these registers
instance	The index of the block of registers to which the writes apply.
time	The time at which the first transaction should be executed.
ack	Should transaction completion be acknowledged?

Exceptions

op_failed	if an ACK is requested and the transaction fails
op_timeout	if an ACK is requested and no response is received
op_seqerr	if an ACK is requested and a sequence error occurs
op_timeerr	if an ACK is requested and a time error occurs (late command)

multi_poke32()

void uhd::rfnoc::multichan_register_iface::multi_poke32 ( const std::vector< uint32_t >  addrs, const std::vector< uint32_t >  data, const size_t  instance = 0, uhd::time_spec_t  time = uhd::time_spec_t::ASAP, bool  ack = false  )

inline

Write multiple 32-bit registers implemented in the NoC block.

This method should be called when multiple writes need to happen that are at non-consecutive addresses. For consecutive writes, cf. block_poke32().

Parameters

addrs	The byte addresses of the registers to write to (each truncated to 20 bits).
data	New values of these registers. The lengths of data and addr must match.
instance	The index of the block of registers to which the writes apply.
time	The time at which the first transaction should be executed.
ack	Should transaction completion be acknowledged?

Exceptions

uhd::value_error	if lengths of data and addr don't match
op_failed	if an ACK is requested and the transaction fails
op_timeout	if an ACK is requested and no response is received
op_seqerr	if an ACK is requested and a sequence error occurs
op_timeerr	if an ACK is requested and a time error occurs (late command)

peek32()

uint32_t uhd::rfnoc::multichan_register_iface::peek32 ( uint32_t  addr, const size_t  instance = 0, time_spec_t  time = uhd::time_spec_t::ASAP  )

inline

Read a 32-bit register implemented in the NoC block.

Parameters

addr	The byte address of the register to read from (truncated to 20 bits).
instance	The index of the block of registers to which the read applies.
time	The time at which the transaction should be executed.

Exceptions

op_failed	if the transaction fails
op_timeout	if no response is received
op_seqerr	if a sequence error occurs

peek64()

uint64_t uhd::rfnoc::multichan_register_iface::peek64 ( uint32_t  addr, const size_t  instance = 0, time_spec_t  time = uhd::time_spec_t::ASAP  )

inline

Read two consecutive 32-bit registers implemented in the NoC block and return them as one 64-bit value.

Note: This is a convenience call, because all register peeks are 32-bits. This will concatenate two peeks in a block peek, and then return the combined result of the two peeks.

Parameters

addr	The byte address of the lower 32-bit register to read from (truncated to 20 bits).
instance	The index of the block of registers to which the reads apply.
time	The time at which the transaction should be executed.

Exceptions

op_failed	if the transaction fails
op_timeout	if no response is received
op_seqerr	if a sequence error occurs

poke32()

void uhd::rfnoc::multichan_register_iface::poke32 ( uint32_t  addr, uint32_t  data, const size_t  instance = 0, uhd::time_spec_t  time = uhd::time_spec_t::ASAP, bool  ack = false  )

inline

Write a 32-bit register implemented in the NoC block.

Parameters

addr	The byte address of the register to write to (truncated to 20 bits).
data	New value of this register.
instance	The index of the block of registers to which the write applies
time	The time at which the transaction should be executed.
ack	Should transaction completion be acknowledged?

Exceptions

op_failed	if an ACK is requested and the transaction fails
op_timeout	if an ACK is requested and no response is received
op_seqerr	if an ACK is requested and a sequence error occurs
op_timeerr	if an ACK is requested and a time error occurs (late command)

poke64()

void uhd::rfnoc::multichan_register_iface::poke64 ( uint32_t  addr, uint64_t  data, const size_t  instance = 0, time_spec_t  time = uhd::time_spec_t::ASAP, bool  ack = false  )

inline

Write two consecutive 32-bit registers implemented in the NoC block from one 64-bit value.

Note: This is a convenience call, because all register pokes are 32-bits. This will concatenate two pokes in a block poke, and then return the combined result of the two pokes.

Parameters

addr	The byte address of the lower 32-bit register to read from (truncated to 20 bits).
data	New value of the register(s).
instance	The index of the block of registers to which the writes apply.
time	The time at which the transaction should be executed.
ack	Should transaction completion be acknowledged?

Exceptions

op_failed	if the transaction fails
op_timeout	if no response is received
op_seqerr	if a sequence error occurs

poll32()

void uhd::rfnoc::multichan_register_iface::poll32 ( uint32_t  addr, uint32_t  data, uint32_t  mask, time_spec_t  timeout, const size_t  instance = 0, time_spec_t  time = uhd::time_spec_t::ASAP, bool  ack = false  )

inline

Poll a 32-bit register until its value for all bits in mask match data&mask

This will insert a command into the command queue to wait until a register is of a certain value. This can be used, e.g., to poll for a lock pin before executing the next command. It is related to sleep(), except it has a condition to wait on, rather than an unconditional stall duration. The timeout is hardware-timed. If the register does not attain the requested value within the requested duration, ${something bad happens}.

Example: Assume readback register 16 is a status register, and bit 0 indicates a lock is in place (i.e., we want it to be 1) and bit 1 is an error flag (i.e., we want it to be 0). The previous command can modify the state of the block, so we give it 1ms to settle. In that case, the call would be thus:

// iface is a multichan_register_iface::sptr:
iface->poll32(16, 0x1, 0x3, 1e-3);

Parameters

addr	The byte address of the register to read from (truncated to 20 bits).
data	The values that the register must have
mask	The bitmask that is applied before checking the readback value
timeout	The max duration that the register is allowed to take before reaching its new state.
instance	The index of the block of registers to which the poll applies.
time	When the poll should be executed
ack	Should transaction completion be acknowledged? This is typically only necessary if the software needs a condition to be fulfilled before continueing, or during debugging.

Exceptions

op_failed	if an ACK is requested and the transaction fails
op_timeout	if an ACK is requested and no response is received
op_seqerr	if an ACK is requested and a sequence error occurs
op_timeerr	if an ACK is requested and a time error occurs (late command)

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The documentation for this class was generated from the following file:

• multichan_register_iface.hpp