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target: mbedos5: Modify generate_pins.py #2524

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Merged
merged 1 commit into from
Nov 20, 2018
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target: mbedos5: Modify generate_pins.py #2524

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54 changes: 14 additions & 40 deletions targets/mbedos5/tools/generate_pins.py
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,7 @@
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Generate pins.js for a specified target, using target definitions from the
Generate pins.cpp for a specified target, using target definitions from the
mbed OS source tree.

It's expecting to be run from the targets/mbedos5 directory.
Expand All @@ -28,9 +28,8 @@
import sys
import os

from simpleeval import SimpleEval, DEFAULT_OPERATORS
from pycparserext.ext_c_parser import GnuCParser
from pycparser import parse_file, c_ast, c_generator
from pycparser import parse_file, c_ast

# import mbed tools
sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'mbed-os'))
Expand Down Expand Up @@ -113,27 +112,7 @@ def visit_typedecl(self, node):
Visit a node.
"""
if node.declname in self.names:
c_gen = c_generator.CGenerator()
pins = {}

operators = DEFAULT_OPERATORS
operators[ast.BitOr] = lambda a, b: a | b
operators[ast.LShift] = lambda a, b: a << b
operators[ast.RShift] = lambda a, b: a << b
evaluator = SimpleEval(DEFAULT_OPERATORS)

for pin in node.type.values.enumerators:
expr = c_gen.visit(pin.value)

if "(int)" in expr:
expr = expr.replace('(int)', '')

if expr in pins:
pins[pin.name] = pins[expr]
else:
pins[pin.name] = evaluator.eval(expr.strip())

return pins
return [pin.name for pin in node.type.values.enumerators]


def enumerate_pins(c_source_file, include_dirs, definitions):
Expand All @@ -158,39 +137,39 @@ def enumerate_pins(c_source_file, include_dirs, definitions):
return visitor.visit(parsed_ast)


def write_pins_to_files(pins, out_js_file, out_cpp_file):
def write_pins_to_file(pins, pins_file, out_cpp_file):
"""
Write the generated pins for a specified mbed board into the output JS and C++ files.
Write the generated pins for a specified mbed board into the output C++ file.
"""
out_js = '\r\n'.join(['var %s = %s;' % pin for pin in pins])
out_js_file.write(out_js)

include = '\n#include "../{}"'.format(pins_file)

count = '''
unsigned int jsmbed_js_magic_string_count = {};
'''.format(len(pins))

lengths = ',\n '.join(str(len(pin[0])) for pin in pins)
lengths = ',\n '.join(str(len(pin)) for pin in pins)
lenghts_source = '''
unsigned int jsmbed_js_magic_string_lengths[] = {
%s
};
''' % lengths

magic_values = ',\n '.join(str(pin[1]) for pin in pins)
magic_values = ',\n '.join(pins)
magic_source = '''
unsigned int jsmbed_js_magic_string_values[] = {
%s
};
''' % magic_values

magic_strings = ',\n '.join('"' + pin[0] + '"' for pin in pins)
magic_strings = ',\n '.join('"' + pin + '"' for pin in pins)
magic_string_source = '''
const char * jsmbed_js_magic_strings[] = {
%s
};
''' % magic_strings

out_cpp_file.write(LICENSE + count + lenghts_source + magic_source + magic_string_source)
out_cpp_file.write(LICENSE + include + count + lenghts_source + magic_source + magic_string_source)


def main():
Expand All @@ -203,17 +182,13 @@ def main():
sys.exit(1)

description = """
Generate pins.js for a specified mbed board, using target definitions from the
Generate pins.cpp for a specified mbed board, using target definitions from the
mbed OS source tree.
"""

parser = argparse.ArgumentParser(description=description)

parser.add_argument('board', help='mbed board name')
parser.add_argument('-o',
help='Output JavaScript file (default: %(default)s)',
default='js/pins.js',
type=argparse.FileType('w'))
parser.add_argument('-c',
help='Output C++ file (default: %(default)s)',
default='source/pins.cpp',
Expand All @@ -237,10 +212,9 @@ def main():
pins = enumerate_pins(pins_file, ['./tools'] + list(includes), defines)

# first sort alphabetically, then by length.
pins = [(x, pins[x]) for x in pins] # turn dict into tuples, which can be sorted
pins = sorted(pins, key=lambda x: (len(x[0]), x[0].lower()))
pins = sorted(pins, key=lambda x: (len(x), x.lower()))

write_pins_to_files(pins, args.o, args.c)
write_pins_to_file(pins, pins_file, args.c)


if __name__ == "__main__":
Expand Down