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#!/usr/bin/env python
"""Generates the pins file for the CC3200."""
from __future__ import print_function
import argparse
import sys
import csv
SUPPORTED_AFS = { 'UART': ('TX', 'RX', 'RTS', 'CTS'),
'SPI': ('CLK', 'MOSI', 'MISO', 'CS0'),
#'I2S': ('CLK', 'FS', 'DAT0', 'DAT1'),
'I2C': ('SDA', 'SCL'),
'TIM': ('PWM0', 'PWM1', 'CC0', 'CC1'),
'SD': ('CLK', 'CMD', 'DAT0'),
'ADC': ('CH0', 'CH1', 'CH2', 'CH3')
}
def parse_port_pin(name_str):
"""Parses a string and returns a (port, gpio_bit) tuple."""
if len(name_str) < 3:
raise ValueError("Expecting pin name to be at least 3 characters")
if name_str[:2] != 'GP':
raise ValueError("Expecting pin name to start with GP")
if not name_str[2:].isdigit():
raise ValueError("Expecting numeric GPIO number")
port = int(int(name_str[2:]) / 8)
gpio_bit = 1 << int(int(name_str[2:]) % 8)
return (port, gpio_bit)
class AF:
"""Holds the description of an alternate function"""
def __init__(self, name, idx, fn, unit, type):
self.name = name
self.idx = idx
if self.idx > 15:
self.idx = -1
self.fn = fn
self.unit = unit
self.type = type
def print(self):
print (' AF({:16s}, {:4d}, {:8s}, {:4d}, {:8s}), // {}'.format(self.name, self.idx, self.fn, self.unit, self.type, self.name))
class Pin:
"""Holds the information associated with a pin."""
def __init__(self, name, port, gpio_bit, pin_num):
self.name = name
self.port = port
self.gpio_bit = gpio_bit
self.pin_num = pin_num
self.board_pin = False
self.afs = []
def add_af(self, af):
self.afs.append(af)
def print(self):
print('// {}'.format(self.name))
if len(self.afs):
print('const pin_af_t pin_{}_af[] = {{'.format(self.name))
for af in self.afs:
af.print()
print('};')
print('pin_obj_t pin_{:4s} = PIN({:6s}, {:1d}, {:3d}, {:2d}, pin_{}_af, {});\n'.format(
self.name, self.name, self.port, self.gpio_bit, self.pin_num, self.name, len(self.afs)))
else:
print('pin_obj_t pin_{:4s} = PIN({:6s}, {:1d}, {:3d}, {:2d}, NULL, 0);\n'.format(
self.name, self.name, self.port, self.gpio_bit, self.pin_num))
def print_header(self, hdr_file):
hdr_file.write('extern pin_obj_t pin_{:s};\n'.format(self.name))
class Pins:
def __init__(self):
self.board_pins = [] # list of pin objects
def find_pin(self, port, gpio_bit):
for pin in self.board_pins:
if pin.port == port and pin.gpio_bit == gpio_bit:
return pin
def find_pin_by_num(self, pin_num):
for pin in self.board_pins:
if pin.pin_num == pin_num:
return pin
def find_pin_by_name(self, name):
for pin in self.board_pins:
if pin.name == name:
return pin
def parse_af_file(self, filename, pin_col, pinname_col, af_start_col):
with open(filename, 'r') as csvfile:
rows = csv.reader(csvfile)
for row in rows:
try:
(port_num, gpio_bit) = parse_port_pin(row[pinname_col])
except:
continue
if not row[pin_col].isdigit():
raise ValueError("Invalid pin number {:s} in row {:s}".format(row[pin_col]), row)
# Pin numbers must start from 0 when used with the TI API
pin_num = int(row[pin_col]) - 1;
pin = Pin(row[pinname_col], port_num, gpio_bit, pin_num)
self.board_pins.append(pin)
af_idx = 0
for af in row[af_start_col:]:
af_splitted = af.split('_')
fn_name = af_splitted[0].rstrip('0123456789')
if fn_name in SUPPORTED_AFS:
type_name = af_splitted[1]
if type_name in SUPPORTED_AFS[fn_name]:
unit_idx = af_splitted[0][-1]
pin.add_af(AF(af, af_idx, fn_name, int(unit_idx), type_name))
af_idx += 1
def parse_board_file(self, filename, cpu_pin_col):
with open(filename, 'r') as csvfile:
rows = csv.reader(csvfile)
for row in rows:
# Pin numbers must start from 0 when used with the TI API
if row[cpu_pin_col].isdigit():
pin = self.find_pin_by_num(int(row[cpu_pin_col]) - 1)
else:
pin = self.find_pin_by_name(row[cpu_pin_col])
if pin:
pin.board_pin = True
def print_named(self, label, pins):
print('')
print('STATIC const mp_map_elem_t pin_{:s}_pins_locals_dict_table[] = {{'.format(label))
for pin in pins:
if pin.board_pin:
print(' {{ MP_OBJ_NEW_QSTR(MP_QSTR_{:6s}), (mp_obj_t)&pin_{:6s} }},'.format(pin.name, pin.name))
print('};')
print('MP_DEFINE_CONST_DICT(pin_{:s}_pins_locals_dict, pin_{:s}_pins_locals_dict_table);'.format(label, label));
def print(self):
for pin in self.board_pins:
if pin.board_pin:
pin.print()
self.print_named('board', self.board_pins)
print('')
def print_header(self, hdr_filename):
with open(hdr_filename, 'wt') as hdr_file:
for pin in self.board_pins:
if pin.board_pin:
pin.print_header(hdr_file)
def print_qstr(self, qstr_filename):
with open(qstr_filename, 'wt') as qstr_file:
pin_qstr_set = set([])
af_qstr_set = set([])
for pin in self.board_pins:
if pin.board_pin:
pin_qstr_set |= set([pin.name])
for af in pin.afs:
af_qstr_set |= set([af.name])
print('// Board pins', file=qstr_file)
for qstr in sorted(pin_qstr_set):
print('Q({})'.format(qstr), file=qstr_file)
print('\n// Pin AFs', file=qstr_file)
for qstr in sorted(af_qstr_set):
print('Q({})'.format(qstr), file=qstr_file)
def main():
parser = argparse.ArgumentParser(
prog="make-pins.py",
usage="%(prog)s [options] [command]",
description="Generate board specific pin file"
)
parser.add_argument(
"-a", "--af",
dest="af_filename",
help="Specifies the alternate function file for the chip",
default="cc3200_af.csv"
)
parser.add_argument(
"-b", "--board",
dest="board_filename",
help="Specifies the board file",
)
parser.add_argument(
"-p", "--prefix",
dest="prefix_filename",
help="Specifies beginning portion of generated pins file",
default="cc3200_prefix.c"
)
parser.add_argument(
"-q", "--qstr",
dest="qstr_filename",
help="Specifies name of generated qstr header file",
default="build/pins_qstr.h"
)
parser.add_argument(
"-r", "--hdr",
dest="hdr_filename",
help="Specifies name of generated pin header file",
default="build/pins.h"
)
args = parser.parse_args(sys.argv[1:])
pins = Pins()
print('// This file was automatically generated by make-pins.py')
print('//')
if args.af_filename:
print('// --af {:s}'.format(args.af_filename))
pins.parse_af_file(args.af_filename, 0, 1, 3)
if args.board_filename:
print('// --board {:s}'.format(args.board_filename))
pins.parse_board_file(args.board_filename, 1)
if args.prefix_filename:
print('// --prefix {:s}'.format(args.prefix_filename))
print('')
with open(args.prefix_filename, 'r') as prefix_file:
print(prefix_file.read())
pins.print()
pins.print_qstr(args.qstr_filename)
pins.print_header(args.hdr_filename)
if __name__ == "__main__":
main()
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