circuitpython/ports/stm32/boards/make-pins.py

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#!/usr/bin/env python
"""Creates the pin file for the STM32F4xx."""
from __future__ import print_function
import argparse
import sys
import csv
SUPPORTED_FN = {
'TIM' : ['CH1', 'CH2', 'CH3', 'CH4',
'CH1N', 'CH2N', 'CH3N', 'CH1_ETR', 'ETR', 'BKIN'],
'I2C' : ['SDA', 'SCL'],
'I2S' : ['CK', 'MCK', 'SD', 'WS', 'EXTSD'],
'USART' : ['RX', 'TX', 'CTS', 'RTS', 'CK'],
'UART' : ['RX', 'TX', 'CTS', 'RTS'],
'SPI' : ['NSS', 'SCK', 'MISO', 'MOSI'],
'SDMMC' : ['CK', 'CMD', 'D0', 'D1', 'D2', 'D3'],
}
CONDITIONAL_VAR = {
'I2C' : 'MICROPY_HW_I2C{num}_SCL',
'I2S' : 'MICROPY_HW_ENABLE_I2S{num}',
'SPI' : 'MICROPY_HW_SPI{num}_SCK',
'UART' : 'MICROPY_HW_UART{num}_TX',
'USART' : 'MICROPY_HW_UART{num}_TX',
'SDMMC' : 'MICROPY_HW_SDMMC{num}_CK',
}
def parse_port_pin(name_str):
"""Parses a string and returns a (port-num, pin-num) tuple."""
if len(name_str) < 3:
raise ValueError("Expecting pin name to be at least 3 charcters.")
if name_str[0] != 'P':
raise ValueError("Expecting pin name to start with P")
if name_str[1] < 'A' or name_str[1] > 'K':
raise ValueError("Expecting pin port to be between A and K")
port = ord(name_str[1]) - ord('A')
pin_str = name_str[2:]
if not pin_str.isdigit():
raise ValueError("Expecting numeric pin number.")
return (port, int(pin_str))
def split_name_num(name_num):
num = None
for num_idx in range(len(name_num) - 1, -1, -1):
if not name_num[num_idx].isdigit():
name = name_num[0:num_idx + 1]
num_str = name_num[num_idx + 1:]
if len(num_str) > 0:
num = int(num_str)
break
return name, num
def conditional_var(name_num):
# Try the specific instance first. For example, if name_num is UART4_RX
# then try UART4 first, and then try UART second.
name, num = split_name_num(name_num)
var = []
if name in CONDITIONAL_VAR:
var.append(CONDITIONAL_VAR[name].format(num=num))
if name_num in CONDITIONAL_VAR:
var.append(CONDITIONAL_VAR[name_num])
return var
def print_conditional_if(cond_var, file=None):
if cond_var:
cond_str = []
for var in cond_var:
if var.find('ENABLE') >= 0:
cond_str.append('(defined({0}) && {0})'.format(var))
else:
cond_str.append('defined({0})'.format(var))
print('#if ' + ' || '.join(cond_str), file=file)
def print_conditional_endif(cond_var, file=None):
if cond_var:
print('#endif', file=file)
class AlternateFunction(object):
"""Holds the information associated with a pins alternate function."""
def __init__(self, idx, af_str):
self.idx = idx
# Special case. We change I2S2ext_SD into I2S2_EXTSD so that it parses
# the same way the other peripherals do.
af_str = af_str.replace('ext_', '_EXT')
self.af_str = af_str
self.func = ''
self.fn_num = None
self.pin_type = ''
self.supported = False
af_words = af_str.split('_', 1)
self.func, self.fn_num = split_name_num(af_words[0])
if len(af_words) > 1:
self.pin_type = af_words[1]
if self.func in SUPPORTED_FN:
pin_types = SUPPORTED_FN[self.func]
if self.pin_type in pin_types:
self.supported = True
def is_supported(self):
return self.supported
def ptr(self):
"""Returns the numbered function (i.e. USART6) for this AF."""
if self.fn_num is None:
return self.func
return '{:s}{:d}'.format(self.func, self.fn_num)
def mux_name(self):
return 'AF{:d}_{:s}'.format(self.idx, self.ptr())
def print(self):
"""Prints the C representation of this AF."""
cond_var = None
if self.supported:
cond_var = conditional_var('{}{}'.format(self.func, self.fn_num))
print_conditional_if(cond_var)
print(' AF', end='')
else:
print(' //', end='')
fn_num = self.fn_num
if fn_num is None:
fn_num = 0
print('({:2d}, {:8s}, {:2d}, {:10s}, {:8s}), // {:s}'.format(self.idx,
self.func, fn_num, self.pin_type, self.ptr(), self.af_str))
print_conditional_endif(cond_var)
def qstr_list(self):
return [self.mux_name()]
class Pin(object):
"""Holds the information associated with a pin."""
def __init__(self, port, pin):
self.port = port
self.pin = pin
self.alt_fn = []
self.alt_fn_count = 0
self.adc_num = 0
self.adc_channel = 0
self.board_pin = False
def port_letter(self):
return chr(self.port + ord('A'))
def cpu_pin_name(self):
return '{:s}{:d}'.format(self.port_letter(), self.pin)
def is_board_pin(self):
return self.board_pin
def set_is_board_pin(self):
self.board_pin = True
def parse_adc(self, adc_str):
if (adc_str[:3] != 'ADC'):
return
(adc,channel) = adc_str.split('_')
for idx in range(3, len(adc)):
adc_num = int(adc[idx]) # 1, 2, or 3
self.adc_num |= (1 << (adc_num - 1))
self.adc_channel = int(channel[2:])
def parse_af(self, af_idx, af_strs_in):
if len(af_strs_in) == 0:
return
# If there is a slash, then the slash separates 2 aliases for the
# same alternate function.
af_strs = af_strs_in.split('/')
for af_str in af_strs:
alt_fn = AlternateFunction(af_idx, af_str)
self.alt_fn.append(alt_fn)
if alt_fn.is_supported():
self.alt_fn_count += 1
def alt_fn_name(self, null_if_0=False):
if null_if_0 and self.alt_fn_count == 0:
return 'NULL'
return 'pin_{:s}_af'.format(self.cpu_pin_name())
def adc_num_str(self):
str = ''
for adc_num in range(1,4):
if self.adc_num & (1 << (adc_num - 1)):
if len(str) > 0:
str += ' | '
str += 'PIN_ADC'
str += chr(ord('0') + adc_num)
if len(str) == 0:
str = '0'
return str
def print(self):
if self.alt_fn_count == 0:
print("// ", end='')
print('const pin_af_obj_t {:s}[] = {{'.format(self.alt_fn_name()))
for alt_fn in self.alt_fn:
alt_fn.print()
if self.alt_fn_count == 0:
print("// ", end='')
print('};')
print('')
print('const pin_obj_t pin_{:s} = PIN({:s}, {:d}, {:s}, {:s}, {:d});'.format(
self.cpu_pin_name(), self.port_letter(), self.pin,
self.alt_fn_name(null_if_0=True),
self.adc_num_str(), self.adc_channel))
print('')
def print_header(self, hdr_file):
hdr_file.write('extern const pin_obj_t pin_{:s};\n'.
format(self.cpu_pin_name()))
if self.alt_fn_count > 0:
hdr_file.write('extern const pin_af_obj_t pin_{:s}_af[];\n'.
format(self.cpu_pin_name()))
def qstr_list(self):
result = []
for alt_fn in self.alt_fn:
if alt_fn.is_supported():
result += alt_fn.qstr_list()
return result
class NamedPin(object):
def __init__(self, name, pin):
self._name = name
self._pin = pin
def pin(self):
return self._pin
def name(self):
return self._name
class Pins(object):
def __init__(self):
self.cpu_pins = [] # list of NamedPin objects
self.board_pins = [] # list of NamedPin objects
def find_pin(self, port_num, pin_num):
for named_pin in self.cpu_pins:
pin = named_pin.pin()
if pin.port == port_num and pin.pin == pin_num:
return pin
def parse_af_file(self, filename, pinname_col, af_col):
with open(filename, 'r') as csvfile:
rows = csv.reader(csvfile)
for row in rows:
try:
(port_num, pin_num) = parse_port_pin(row[pinname_col])
except:
continue
pin = Pin(port_num, pin_num)
for af_idx in range(af_col, len(row)):
if af_idx < af_col + 16:
pin.parse_af(af_idx - af_col, row[af_idx])
elif af_idx == af_col + 16:
pin.parse_adc(row[af_idx])
self.cpu_pins.append(NamedPin(pin.cpu_pin_name(), pin))
def parse_board_file(self, filename):
with open(filename, 'r') as csvfile:
rows = csv.reader(csvfile)
for row in rows:
try:
(port_num, pin_num) = parse_port_pin(row[1])
except:
continue
pin = self.find_pin(port_num, pin_num)
if pin:
pin.set_is_board_pin()
self.board_pins.append(NamedPin(row[0], pin))
def print_named(self, label, named_pins):
print('STATIC const mp_rom_map_elem_t pin_{:s}_pins_locals_dict_table[] = {{'.format(label))
for named_pin in named_pins:
pin = named_pin.pin()
if pin.is_board_pin():
print(' {{ MP_ROM_QSTR(MP_QSTR_{:s}), MP_ROM_PTR(&pin_{:s}) }},'.format(named_pin.name(), pin.cpu_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 named_pin in self.cpu_pins:
pin = named_pin.pin()
if pin.is_board_pin():
pin.print()
self.print_named('cpu', self.cpu_pins)
print('')
self.print_named('board', self.board_pins)
def print_adc(self, adc_num):
print('');
print('const pin_obj_t * const pin_adc{:d}[] = {{'.format(adc_num))
for channel in range(17):
if channel == 16:
print('#if defined(STM32L4)')
adc_found = False
for named_pin in self.cpu_pins:
pin = named_pin.pin()
if (pin.is_board_pin() and
(pin.adc_num & (1 << (adc_num - 1))) and (pin.adc_channel == channel)):
print(' &pin_{:s}, // {:d}'.format(pin.cpu_pin_name(), channel))
adc_found = True
break
if not adc_found:
print(' NULL, // {:d}'.format(channel))
if channel == 16:
print('#endif')
print('};')
def print_header(self, hdr_filename):
with open(hdr_filename, 'wt') as hdr_file:
for named_pin in self.cpu_pins:
pin = named_pin.pin()
if pin.is_board_pin():
pin.print_header(hdr_file)
hdr_file.write('extern const pin_obj_t * const pin_adc1[];\n')
hdr_file.write('extern const pin_obj_t * const pin_adc2[];\n')
hdr_file.write('extern const pin_obj_t * const pin_adc3[];\n')
# provide #define's mapping board to cpu name
for named_pin in self.board_pins:
hdr_file.write("#define pyb_pin_{:s} pin_{:s}\n".format(named_pin.name(), named_pin.pin().cpu_pin_name()))
def print_qstr(self, qstr_filename):
with open(qstr_filename, 'wt') as qstr_file:
qstr_set = set([])
for named_pin in self.cpu_pins:
pin = named_pin.pin()
if pin.is_board_pin():
qstr_set |= set(pin.qstr_list())
qstr_set |= set([named_pin.name()])
for named_pin in self.board_pins:
qstr_set |= set([named_pin.name()])
for qstr in sorted(qstr_set):
cond_var = None
if qstr.startswith('AF'):
af_words = qstr.split('_')
cond_var = conditional_var(af_words[1])
print_conditional_if(cond_var, file=qstr_file)
print('Q({})'.format(qstr), file=qstr_file)
print_conditional_endif(cond_var, file=qstr_file)
def print_af_hdr(self, af_const_filename):
with open(af_const_filename, 'wt') as af_const_file:
af_hdr_set = set([])
mux_name_width = 0
for named_pin in self.cpu_pins:
pin = named_pin.pin()
if pin.is_board_pin():
for af in pin.alt_fn:
if af.is_supported():
mux_name = af.mux_name()
af_hdr_set |= set([mux_name])
if len(mux_name) > mux_name_width:
mux_name_width = len(mux_name)
for mux_name in sorted(af_hdr_set):
af_words = mux_name.split('_') # ex mux_name: AF9_I2C2
cond_var = conditional_var(af_words[1])
print_conditional_if(cond_var, file=af_const_file)
key = 'MP_ROM_QSTR(MP_QSTR_{}),'.format(mux_name)
val = 'MP_ROM_INT(GPIO_{})'.format(mux_name)
print(' { %-*s %s },' % (mux_name_width + 26, key, val),
file=af_const_file)
print_conditional_endif(cond_var, file=af_const_file)
def print_af_py(self, af_py_filename):
with open(af_py_filename, 'wt') as af_py_file:
print('PINS_AF = (', file=af_py_file);
for named_pin in self.board_pins:
print(" ('%s', " % named_pin.name(), end='', file=af_py_file)
for af in named_pin.pin().alt_fn:
if af.is_supported():
print("(%d, '%s'), " % (af.idx, af.af_str), end='', file=af_py_file)
print('),', file=af_py_file)
print(')', file=af_py_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="stm32f4xx_af.csv"
)
parser.add_argument(
"--af-const",
dest="af_const_filename",
help="Specifies header file for alternate function constants.",
default="build/pins_af_const.h"
)
parser.add_argument(
"--af-py",
dest="af_py_filename",
help="Specifies the filename for the python alternate function mappings.",
default="build/pins_af.py"
)
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="stm32f4xx_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, 1, 2)
if args.board_filename:
print('// --board {:s}'.format(args.board_filename))
pins.parse_board_file(args.board_filename)
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_adc(1)
pins.print_adc(2)
pins.print_adc(3)
pins.print_header(args.hdr_filename)
pins.print_qstr(args.qstr_filename)
pins.print_af_hdr(args.af_const_filename)
pins.print_af_py(args.af_py_filename)
if __name__ == "__main__":
main()