cc3200: Add cc3200 port of MicroPython.

The port currently implements support for GPIO, RTC, ExtInt and the WiFi
subsystem. A small file system is available in the serial flash. A
bootloader which makes OTA updates possible, is also part of this initial
implementation.

1 files changed, 182 insertions, 0 deletions

diff --git a/cc3200/boards/make-pins.py b/cc3200/boards/make-pins.py
new file mode 100644
index 000000000..ad0c9b7b8
--- /dev/null
+++ b/cc3200/boards/make-pins.py
@@ -0,0 +1,182 @@
+#!/usr/bin/env python
+"""Creates the pin file for the CC3200."""
+
+from __future__ import print_function
+
+import argparse
+import sys
+import csv
+
+
+def parse_port_pin(name_str):
+    """Parses a string and returns a (port, gpio_bit) tuple."""
+    if len(name_str) < 5:
+        raise ValueError("Expecting pin name to be at least 5 characters")
+    if name_str[:4] != 'GPIO':
+        raise ValueError("Expecting pin name to start with GPIO")
+    if not name_str[4:].isdigit():
+        raise ValueError("Expecting numeric GPIO number")
+    port = int(int(name_str[4:]) / 8)
+    gpio_bit = 1 << int(int(name_str[4:]) % 8)
+    return (port, gpio_bit)
+
+
+class Pin(object):
+    """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
+
+    def cpu_pin_name(self):
+        return self.name  
+        
+    def is_board_pin(self):
+        return self.board_pin
+
+    def set_is_board_pin(self):
+        self.board_pin = True
+        
+    def print(self):
+        print('const gpio_obj_t pin_{:6s} = GPIO({:6s}, {:1d}, {:3d}, {:2d});'.format(
+               self.name, self.name, self.port, self.gpio_bit, self.pin_num))
+
+    def print_header(self, hdr_file):
+        hdr_file.write('extern const gpio_obj_t pin_{:s};\n'.
+                       format(self.name))
+
+
+class Pins(object):
+
+    def __init__(self):
+        self.cpu_pins = []   # list of pin objects
+
+    def find_pin(self, port, gpio_bit):
+        for pin in self.cpu_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.cpu_pins:
+            if pin.pin_num == pin_num:
+                return pin
+
+    def parse_af_file(self, filename, pin_col, pinname_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.cpu_pins.append(pin)
+                
+    def parse_board_file(self, filename, cpu_pin_num_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
+                pin = self.find_pin_by_num(int(row[cpu_pin_num_col]) - 1)
+                if pin:
+                    pin.set_is_board_pin()
+
+    def print_named(self, label, pins):
+        print('')
+        print('STATIC const mp_map_elem_t gpio_{:s}_pins_locals_dict_table[] = {{'.format(label))
+        for pin in pins:
+            if pin.is_board_pin():
+                print('  {{ MP_OBJ_NEW_QSTR(MP_QSTR_{:6s}), (mp_obj_t)&pin_{:6s} }},'.format(pin.cpu_pin_name(),  pin.cpu_pin_name()))
+        print('};')
+        print('MP_DEFINE_CONST_DICT(gpio_{:s}_pins_locals_dict, gpio_{:s}_pins_locals_dict_table);'.format(label, label));
+
+    def print(self):
+        for pin in self.cpu_pins:
+            if pin.is_board_pin():
+                pin.print()
+        self.print_named('cpu', self.cpu_pins)
+        print('')
+
+    def print_header(self, hdr_filename):
+        with open(hdr_filename, 'wt') as hdr_file:
+            for pin in self.cpu_pins:
+                if pin.is_board_pin():
+                    pin.print_header(hdr_file)
+
+    def print_qstr(self, qstr_filename):
+        with open(qstr_filename, 'wt') as qstr_file:
+            qstr_set = set([])
+            for pin in self.cpu_pins:
+                if pin.is_board_pin():
+                    qstr_set |= set([pin.cpu_pin_name()])
+            for qstr in sorted(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)
+
+    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()