From bc6eb8c0fb6c41d7bc36b05e9da465b299937de8 Mon Sep 17 00:00:00 2001
From: Neel <neelgala@gmail.com>
Date: Tue, 13 Mar 2018 21:07:58 +0530
Subject: [PATCH] check for pin number consistency.

see #3.
Added check to see if the user input has screwed up the pin numbering in punmap.txt. This check detects for duplicate assignment to Pins or if some pins are missed out on assignment.
---
 src/parse.py | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/src/parse.py b/src/parse.py
index db7a48a..cd4a3fe 100644
--- a/src/parse.py
+++ b/src/parse.py
@@ -6,21 +6,31 @@ N_UART = 4
 N_SPI = 1
 N_TWI = 2
 # ================ #
+
+
+def missing_numbers(num_list):
+    original_list = [x for x in range(num_list[0], num_list[-1] + 1)]
+    num_list = set(num_list)
+    return (list(num_list ^ set(original_list)))
+
+
 # == capture the number of IO cells required == #
 pinmapfile = open('pinmap.txt', 'r')
 max_io = 0
 muxed_cells = []
 dedicated_cells = []
+pinnumbers = []
 for lineno, line in enumerate(pinmapfile):
     line1 = line.split()
     if(len(line1) > 1):
+        pinnumbers.append(int(line1[0]))
         if(len(line1) == 2):  # dedicated
             dedicated_cells.append(line1)
         if(len(line1) > 2):
             muxed_cells.append(line1)
 # ============================================= #
-
 # ======= Multiple checks to see if the user has not screwed ======#
+missing_pins = missing_numbers(pinnumbers)
 
 # Check-1: ensure that no pin is present in both muxed and dedicated pins
 for muxcell in muxed_cells:
@@ -29,6 +39,22 @@ for muxcell in muxed_cells:
             print("ERROR: " + str(dedcel[1]) + " present \
                                   in dedicated & muxed lists")
             exit(1)
+
+# Check-2: if pin numbering is consistent:
+if missing_pins:
+    print("ERROR: Following pins have no assignment: " +
+          str(missing_numbers(pinnumbers)))
+    exit(1)
+unique = set(pinnumbers)
+duplicate = False
+for each in unique:
+    count = pinnumbers.count(each)
+    if(count > 1):
+        print("ERROR: Multiple assignment for pin: " + str(each))
+        duplicate = True
+if(duplicate):
+    exit(1)
+
 # Check-2: confirm if N_* matches the instances in the pinmap
 # ============================================================== #
 
-- 
2.30.2