120 lines
3.9 KiB
Python
120 lines
3.9 KiB
Python
# This file is part of Fast Servo Software Package.
|
|
#
|
|
# Copyright (C) 2023 Jakub Matyas
|
|
# Warsaw University of Technology <jakubk.m@gmail.com>
|
|
# SPDX-License-Identifier: GPL-3.0-or-later
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
import os
|
|
import mmap
|
|
|
|
CSR_SIZE = 0x800
|
|
MAP_SIZE = 0x1000
|
|
MAP_MASK = 0xFFF
|
|
PAGESIZE = 0x1000
|
|
|
|
# LINIEN_OFFSET = 0x0
|
|
LINIEN_OFFSET = 0x300000
|
|
|
|
# ----------------------------------------------------------------
|
|
# FRONT PANEL LEDS REGISTER ADDRESSES
|
|
LED0_BASE_ADDR = 0x40005000 + LINIEN_OFFSET
|
|
LED1_BASE_ADDR = 0x40005800 + LINIEN_OFFSET
|
|
LED2_BASE_ADDR = 0x40006000 + LINIEN_OFFSET
|
|
LED3_BASE_ADDR = 0x40006800 + LINIEN_OFFSET
|
|
|
|
|
|
# ----------------------------------------------------------------
|
|
# DAC REGISTER ADDRESSES
|
|
ADC_BASE_ADDR = 0x40004800 + LINIEN_OFFSET
|
|
ADC_FRAME_OFFSET = 0x0
|
|
ADC_CH0_HIGH_OFFSET = 0x4
|
|
ADC_CH0_LOW_OFFSET = 0x8
|
|
ADC_CH1_HIGH_OFFSET = 0xC
|
|
ADC_CH1_LOW_OFFSET = 0x10
|
|
ADC_TAP_DELAY_OFFSET = 0x14
|
|
ADC_BITSLIP_OFFSET = 0x18
|
|
ADC_AFE_CTRL_OFFSET = 0x1C
|
|
|
|
|
|
ADC_FRAME_ADDR = ADC_BASE_ADDR + ADC_FRAME_OFFSET
|
|
ADC_CH0_HIGH_ADDR = ADC_BASE_ADDR + ADC_CH0_HIGH_OFFSET
|
|
ADC_CH0_LOW_ADDR = ADC_BASE_ADDR + ADC_CH0_LOW_OFFSET
|
|
ADC_CH1_HIGH_ADDR = ADC_BASE_ADDR + ADC_CH1_HIGH_OFFSET
|
|
ADC_CH1_LOW_ADDR = ADC_BASE_ADDR + ADC_CH1_LOW_OFFSET
|
|
ADC_DELAY_ADDR = ADC_BASE_ADDR + ADC_TAP_DELAY_OFFSET
|
|
ADC_BITSLIP_ADDR = ADC_BASE_ADDR + ADC_BITSLIP_OFFSET
|
|
ADC_AFE_CTRL_ADDR = ADC_BASE_ADDR + ADC_AFE_CTRL_OFFSET
|
|
|
|
AUX_ADC_ADDR = 0x40007800 + LINIEN_OFFSET
|
|
|
|
|
|
# ----------------------------------------------------------------
|
|
# DAC REGISTER ADDRESSES
|
|
DAC_BASE_ADDR = 0x40007000 + LINIEN_OFFSET
|
|
CTRL_OFFSET = 0x0
|
|
CH0_HIGH_WORD_OFFSET = 0x4
|
|
CH0_LOW_WORD_OFFSET = 0x8
|
|
CH1_HIGH_WORD_OFFSET = 0xC
|
|
CH1_LOW_WORD_OFFSET = 0x10
|
|
|
|
CTRL_ADDR = DAC_BASE_ADDR + CTRL_OFFSET
|
|
CH0_HIGH_WORD_ADDR = DAC_BASE_ADDR + CH0_HIGH_WORD_OFFSET
|
|
CH0_LOW_WORD_ADDR = DAC_BASE_ADDR + CH0_LOW_WORD_OFFSET
|
|
CH1_HIGH_WORD_ADDR = DAC_BASE_ADDR + CH1_HIGH_WORD_OFFSET
|
|
CH1_LOW_WORD_ADDR = DAC_BASE_ADDR + CH1_LOW_WORD_OFFSET
|
|
|
|
|
|
def read_from_memory(address, n_bytes):
|
|
assert n_bytes <= 4
|
|
addr = address
|
|
|
|
try:
|
|
f = os.open("/dev/mem", os.O_SYNC | os.O_RDWR)
|
|
with mmap.mmap(
|
|
f,
|
|
PAGESIZE,
|
|
mmap.MAP_SHARED,
|
|
mmap.PROT_READ | mmap.PROT_WRITE,
|
|
offset=addr & ~MAP_MASK,
|
|
) as mem:
|
|
start_addr = addr & MAP_MASK
|
|
stop_addr = start_addr + 4
|
|
contents = mem[start_addr:stop_addr]
|
|
read_value = list(contents)[:n_bytes]
|
|
finally:
|
|
os.close(f)
|
|
|
|
return read_value
|
|
|
|
def write_to_memory(address, value):
|
|
value_bytes = value.to_bytes(4, "little")
|
|
addr = address
|
|
|
|
try:
|
|
f = os.open("/dev/mem", os.O_SYNC | os.O_RDWR)
|
|
with mmap.mmap(
|
|
f,
|
|
PAGESIZE,
|
|
mmap.MAP_SHARED,
|
|
mmap.PROT_READ | mmap.PROT_WRITE,
|
|
offset=addr & ~MAP_MASK,
|
|
) as mem:
|
|
start_addr = addr & MAP_MASK
|
|
stop_addr = start_addr + 4
|
|
mem[start_addr:stop_addr] = value_bytes
|
|
contents = mem[start_addr:stop_addr]
|
|
finally:
|
|
os.close(f) |