pynq.mmio Module¶

class pynq.mmio.MMIO(base_addr, length=4, device=None, **kwargs)[source]¶

Bases: object

This class exposes API for MMIO read and write.

base_addr¶

The base address, not necessarily page aligned.

Type:	int

length¶

The length in bytes of the address range.

Type:	int

array¶

A numpy view of the mapped range for efficient assignment

Type:	numpy.ndarray

device¶

A device that can interact with the PL server.

Type:	Device

read(offset=0, length=4, word_order='little')[source]¶

The method to read data from MMIO.

For the word_order parameter, it is only effective when operating 8 bytes. If it is little, from MSB to LSB, the bytes will be offset+4, offset+5, offset+6, offset+7, offset+0, offset+1, offset+2, offset+3. If it is big, from MSB to LSB, the bytes will be offset+0, offset+1, …, offset+7. This is different than the byte order (endianness); notice the endianness has not changed.

Parameters:	offset (int) – The read offset from the MMIO base address. length (int) – The length of the data in bytes. word_order (str) – The word order of the 8-byte reads.
Returns:	A list of data read out from MMIO
Return type:	list

write_mm(offset, data)[source]¶

The method to write data to MMIO.

Parameters:	offset (int) – The write offset from the MMIO base address. data (int / bytes) – The integer(s) to be written into MMIO.
Returns:
Return type:	None

write_reg(offset, data)[source]¶

The method to write data to MMIO.

Parameters:	offset (int) – The write offset from the MMIO base address. data (int / bytes) – The integer(s) to be written into MMIO.
Returns:
Return type:	None