Source code for pynq.lib.rpi.rpi

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import os
from pynq.lib import PynqMicroblaze
from pynq.lib.pynqmicroblaze import add_bsp
from . import MAILBOX_OFFSET
from . import MAILBOX_PY2IOP_CMD_OFFSET
from . import BIN_LOCATION
from . import BSP_LOCATION


__author__ = "Yun Rock Qu"
__copyright__ = "Copyright 2016, Xilinx"
__email__ = "yunq@xilinx.com"


[docs]class Rpi(PynqMicroblaze): """This class controls the Raspberry Pi Microblaze instances in the system. This class inherits from the PynqMicroblaze class. It extends PynqMicroblaze with capability to control Raspberry Pi devices. Attributes ---------- ip_name : str The name of the IP corresponding to the Microblaze. rst_name : str The name of the reset pin for the Microblaze. mb_program : str The absolute path of the Microblaze program. state : str The status (IDLE, RUNNING, or STOPPED) of the Microblaze. reset_pin : GPIO The reset pin associated with the Microblaze. mmio : MMIO The MMIO instance associated with the Microblaze. interrupt : Event An asyncio.Event-like class for waiting on and clearing interrupts. """ def __init__(self, mb_info, mb_program): """Create a new Microblaze object. This method leverages the initialization method of its parent. It also deals with relative / absolute path of the program. Parameters ---------- mb_info : dict A dictionary storing Microblaze information, such as the IP name and the reset name. mb_program : str The Microblaze program loaded for the processor. Examples -------- The `mb_info` is a dictionary storing Microblaze information: >>> mb_info = {'ip_name': 'mb_bram_ctrl_1', 'rst_name': 'mb_reset_1', 'intr_pin_name': 'iop1/dff_en_reset_0/q', 'intr_ack_name': 'mb_1_intr_ack'} """ if not os.path.isabs(mb_program): mb_program = os.path.join(BIN_LOCATION, mb_program) super().__init__(mb_info, mb_program)
[docs] def write_mailbox(self, data_offset, data): """This method write data into the mailbox of the Microblaze. Parameters ---------- data_offset : int The offset for mailbox data, 0,4,... for MAILBOX 0,1,... data : int/list A list of 32b words to be written into the mailbox. Returns ------- None """ offset = MAILBOX_OFFSET + data_offset self.write(offset, data)
[docs] def read_mailbox(self, data_offset, num_words=1): """This method reads mailbox data from the Microblaze. Parameters ---------- data_offset : int The offset for mailbox data, 0,4,... for MAILBOX 0,1,... num_words : int Number of 32b words to read from Microblaze mailbox. Returns ------- int/list An int of a list of data read from the mailbox. """ offset = MAILBOX_OFFSET + data_offset return self.read(offset, num_words)
[docs] def write_blocking_command(self, command): """This method writes a blocking command to the Microblaze. The program waits in the loop until the command is cleared by the Microblaze. Parameters ---------- command : int The command to write to the Microblaze. Returns ------- None """ self.write(MAILBOX_OFFSET + MAILBOX_PY2IOP_CMD_OFFSET, command) while self.read(MAILBOX_OFFSET + MAILBOX_PY2IOP_CMD_OFFSET) != 0: pass
[docs] def write_non_blocking_command(self, command): """This method writes a non-blocking command to the Microblaze. The program will just send the command and returns the control immediately. Parameters ---------- command : int The command to write to the Microblaze. Returns ------- None """ self.write(MAILBOX_OFFSET + MAILBOX_PY2IOP_CMD_OFFSET, command)
add_bsp(BSP_LOCATION)