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pins.py
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#!/usr/bin/env python3
import os
import sys
import json
import csv
import re
from dotmap import DotMap
# ------------------------------------------------------------------------------
adc_channel = {
"F7": "47",
"F6": "46",
"F5": "45",
"F4": "44",
"F3": "43",
"F2": "42",
"F1": "41",
"F0": "40",
"E2": "34",
"E1": "33",
"E0": "32",
"D7": "31",
"D6": "30",
"D5": "29",
"D4": "28",
"D3": "27",
"D2": "26",
"D1": "25",
"D0": "24",
"C7": "23",
"C6": "22",
"C5": "21",
"C4": "20",
"C3": "19",
"C2": "18",
"C1": "17",
"C0": "16",
"B7": "15",
"B6": "14",
"B5": "13",
"B4": "12",
"B3": "11",
"B2": "10",
"B1": "9",
"B0": "8",
"A7": "7",
"A6": "6",
"A5": "5",
"A4": "4",
"A3": "3",
"A2": "2",
"A1": "1",
"A0": "0",
}
def GPIO_read_function_signature(pin_name):
return "bool " + "read_" + pin_name + "(void)"
def GPIO_write_function_signature(pin_name):
return "void " + "set_" + pin_name + "(bool value)"
# ------------------------------------------------------------------------------
def pin_declarations():
pins = load_pins_from_file()
text = [""]
line = text.append
gpio_pins = [p for p in pins if "gpio" in p.tags]
line("// GPIO read functions")
gpio_input_pins = [p for p in gpio_pins if "input" in p.tags]
if not gpio_input_pins:
line("// none")
for p in gpio_input_pins:
line(f"extern {GPIO_read_function_signature(p.name)};")
line("")
line("// GPIO write functions")
gpio_output_pins = [p for p in gpio_pins if "output" in p.tags]
if not gpio_output_pins:
line("// none")
for p in gpio_output_pins:
line(f"extern {GPIO_write_function_signature(p.name)};")
line("")
line("// PPS initialization macros")
pps_pins = [p for p in pins if "pps" in p.tags]
if not pps_pins:
line("// none")
for p in pps_pins:
if "input" in p.tags:
line(f"#define PPS_{p.name} PPS_INPUT({p.pin[0]}, {p.pin[1]})")
elif "output" in p.tags:
line(f"#define PPS_{p.name} PPS_OUTPUT({p.pin[0]}, {p.pin[1]})")
line("")
line("// ADC Channel Select macros")
analog_pins = [p for p in pins if "analog" in p.tags]
if not analog_pins:
line("// none")
for p in analog_pins:
line(f"#define ADC_{p.name} {adc_channel[p.pin]}")
line("")
return "\n".join(text)
# ------------------------------------------------------------------------------
def pin_definitions():
pins = load_pins_from_file()
text = [""]
line = text.append
gpio_pins = [p for p in pins if "gpio" in p.tags]
line("// GPIO read functions")
gpio_input_pins = [p for p in gpio_pins if "input" in p.tags]
if not gpio_input_pins:
line("// none")
for p in gpio_input_pins:
line(GPIO_read_function_signature(p.name) + " { ")
line(f" return PORT{p.pin[0]}bits.R{p.pin};")
line("}")
line("")
line("// GPIO write functions")
gpio_output_pins = [p for p in gpio_pins if "output" in p.tags]
if not gpio_output_pins:
line("// none")
for p in gpio_output_pins:
line(GPIO_write_function_signature(p.name) + " { ")
line(f" LAT{p.pin[0]}bits.LAT{p.pin} = value;" )
line("}")
line("")
return "\n".join(text)
def pins_init():
pins = load_pins_from_file()
text = [""]
line = text.append
line("void pins_init(void) {")
for p in pins:
line(f" // {p.name}")
if "input" in p.tags:
line(f" TRIS{p.pin[0]}bits.TRIS{p.pin} = 1;")
elif "output" in p.tags:
line(f" TRIS{p.pin[0]}bits.TRIS{p.pin} = 0;")
if "analog" in p.tags:
line(f" ANSEL{p.pin[0]}bits.ANSEL{p.pin} = 1;")
if "button" in p.tags:
line(f" WPU{p.pin[0]}bits.WPU{p.pin} = 1;")
line("")
line("}")
return "\n".join(text)
# ------------------------------------------------------------------------------
def skip_comments(lines):
for line in lines:
line = re.sub(r'\s*#.*$', '', line).strip()
if line:
yield line
def load_pins_from_file():
with open('pins.csv', 'r') as f:
csv.register_dialect('pincsv', skipinitialspace=True)
reader = csv.DictReader(skip_comments(f), dialect='pincsv')
pins = [DotMap(r) for r in reader if r['name']]
for p in pins:
p.tags = p.tags.split(" ")
return pins