262 lines
8.1 KiB
Python
262 lines
8.1 KiB
Python
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#!/usr/bin/env python
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"""Creates the pin file for the STM32F4xx."""
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from __future__ import print_function
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import argparse
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import sys
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import csv
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SUPPORTED_FN = {
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'TIM' : ['CH1', 'CH2', 'CH3', 'CH4',
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'CH1N', 'CH2N', 'CH3N', 'CH1_ETR', 'ETR', 'BKIN'],
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'I2C' : ['SDA', 'SCL'],
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'USART' : ['RX', 'TX', 'CTS', 'RTS', 'CK'],
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'UART' : ['RX', 'TX', 'CTS', 'RTS'],
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'SPI' : ['NSS', 'SCK', 'MISO', 'MOSI']
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}
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def parse_port_pin(name_str):
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"""Parses a string and returns a (port-num, pin-num) tuple."""
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if len(name_str) < 3:
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raise ValueError("Expecting pin name to be at least 3 charcters.")
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if name_str[0] != 'P':
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raise ValueError("Expecting pin name to start with P")
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if name_str[1] < 'A' or name_str[1] > 'J':
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raise ValueError("Expecting pin port to be between A and J")
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port = ord(name_str[1]) - ord('A')
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pin_str = name_str[2:]
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if not pin_str.isdigit():
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raise ValueError("Expecting numeric pin number.")
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return (port, int(pin_str))
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def split_name_num(name_num):
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num = None
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for num_idx in range(len(name_num) - 1, -1, -1):
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if not name_num[num_idx].isdigit():
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name = name_num[0:num_idx + 1]
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num_str = name_num[num_idx + 1:]
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if len(num_str) > 0:
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num = int(num_str)
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break
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return name, num
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class AlternateFunction(object):
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"""Holds the information associated with a pins alternate function."""
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def __init__(self, idx, af_str):
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self.idx = idx
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self.af_str = af_str
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self.func = ''
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self.fn_num = None
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self.pin_type = ''
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self.supported = False
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af_words = af_str.split('_', 1)
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self.func, self.fn_num = split_name_num(af_words[0])
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if len(af_words) > 1:
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self.pin_type = af_words[1]
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if self.func in SUPPORTED_FN:
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pin_types = SUPPORTED_FN[self.func]
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if self.pin_type in pin_types:
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self.supported = True
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def is_supported(self):
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return self.supported
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def ptr(self):
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"""Returns the numbered function (i.e. USART6) for this AF."""
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if self.fn_num is None:
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return self.func
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return '{:s}{:d}'.format(self.func, self.fn_num)
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def print(self):
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"""Prints the C representation of this AF."""
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if self.supported:
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print(' AF', end='')
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else:
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print(' //', end='')
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fn_num = self.fn_num
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if fn_num is None:
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fn_num = 0
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print('({:2d}, {:8s}, {:2d}, {:10s}, {:8s}), // {:s}'.format(self.idx,
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self.func, fn_num, self.pin_type, self.ptr(), self.af_str))
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class Pin(object):
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"""Holds the information associated with a pin."""
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def __init__(self, port, pin):
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self.port = port
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self.pin = pin
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self.alt_fn = []
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self.board_name = None
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self.alt_fn_count = 0
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def port_letter(self):
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return chr(self.port + ord('A'))
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def pin_name(self):
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return '{:s}{:d}'.format(self.port_letter(), self.pin)
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def parse_af(self, af_idx, af_strs_in):
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if len(af_strs_in) == 0:
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return
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# If there is a slash, then the slash separates 2 aliases for the
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# same alternate function.
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af_strs = af_strs_in.split('/')
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for af_str in af_strs:
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alt_fn = AlternateFunction(af_idx, af_str)
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self.alt_fn.append(alt_fn)
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if alt_fn.is_supported():
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self.alt_fn_count += 1
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def alt_fn_name(self):
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if self.alt_fn_count > 0:
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return 'pin_{:s}_af'.format(self.pin_name())
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return 'NULL'
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def print(self):
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if self.alt_fn_count == 0:
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print("// ", end='')
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print('const pin_af_obj_t {:s}[] = {{'.format(self.alt_fn_name()))
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for alt_fn in self.alt_fn:
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alt_fn.print()
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if self.alt_fn_count == 0:
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print("// ", end='')
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print('};')
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print('')
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print('const pin_obj_t pin_{:s} = PIN({:s}, {:d}, {:d}, {:s});'.format(
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self.pin_name(), self.port_letter(), self.pin,
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self.alt_fn_count, self.alt_fn_name()))
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print('')
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def print_header(self, hdr_file):
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hdr_file.write('extern const pin_obj_t pin_{:s};\n'.
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format(self.pin_name()))
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if self.alt_fn_count > 0:
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hdr_file.write('extern const pin_af_obj_t pin_{:s}_af[];\n'.
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format(self.pin_name()))
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class Pins(object):
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def __init__(self):
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self.pins = []
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self.board_pins = []
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def find_pin(self, port_num, pin_num):
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for pin in self.pins:
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if pin.port == port_num and pin.pin == pin_num:
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return pin
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def parse_af_file(self, filename, pinname_col, af_col):
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with open(filename, 'r') as csvfile:
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rows = csv.reader(csvfile)
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for row in rows:
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try:
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(port_num, pin_num) = parse_port_pin(row[pinname_col])
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except:
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continue
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pin = Pin(port_num, pin_num)
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for af_idx in range(af_col, len(row)):
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pin.parse_af(af_idx - af_col, row[af_idx])
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self.pins.append(pin)
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def parse_board_file(self, filename):
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with open(filename, 'r') as csvfile:
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rows = csv.reader(csvfile)
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for row in rows:
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try:
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(port_num, pin_num) = parse_port_pin(row[1])
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except:
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continue
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pin = self.find_pin(port_num, pin_num)
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if pin:
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pin.board_name = row[0]
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self.board_pins.append(pin)
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def print_named(self, label, pins):
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print('const pin_named_pin_t pin_{:s}_pins[] = {{'.format(label))
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for pin in pins:
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if pin.board_name:
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if label == 'board':
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pin_name = pin.board_name
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else:
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pin_name = pin.pin_name()
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print(' {{ "{:s}", &pin_{:s} }},'.format(pin_name, pin.pin_name()))
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print(' { NULL, NULL }')
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print('};')
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def print(self):
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for pin in self.pins:
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if pin.board_name:
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pin.print()
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self.print_named('cpu', self.pins)
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print('')
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self.print_named('board', self.board_pins)
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def print_header(self, hdr_filename):
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with open(hdr_filename, 'wt') as hdr_file:
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for pin in self.pins:
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if pin.board_name:
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pin.print_header(hdr_file)
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def main():
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parser = argparse.ArgumentParser(
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prog="make-pins.py",
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usage="%(prog)s [options] [command]",
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description="Generate board specific pin file"
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)
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parser.add_argument(
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"-a", "--af",
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dest="af_filename",
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help="Specifies the alternate function file for the chip",
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default="stm32f4xx-af.csv"
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)
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parser.add_argument(
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"-b", "--board",
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dest="board_filename",
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help="Specifies the board file",
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)
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parser.add_argument(
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"-p", "--prefix",
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dest="prefix_filename",
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help="Specifies beginning portion of generated pins file",
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default="stm32f4xx-prefix.c"
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)
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parser.add_argument(
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"-r", "--hdr",
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dest="hdr_filename",
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help="Specifies name of generated pin header file",
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default="build/pins.h"
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)
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args = parser.parse_args(sys.argv[1:])
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pins = Pins()
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print('// This file was automatically generated by make-pins.py')
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print('//')
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if args.af_filename:
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print('// --af {:s}'.format(args.af_filename))
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pins.parse_af_file(args.af_filename, 1, 2)
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if args.board_filename:
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print('// --board {:s}'.format(args.board_filename))
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pins.parse_board_file(args.board_filename)
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if args.prefix_filename:
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print('// --prefix {:s}'.format(args.prefix_filename))
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print('')
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with open(args.prefix_filename, 'r') as prefix_file:
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print(prefix_file.read())
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pins.print()
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pins.print_header(args.hdr_filename)
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if __name__ == "__main__":
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main()
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