Bruno Allaire-Lemay / Mbed 2 deprecated APP1test

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Dependencies:   mbed

Fork of APP1 by Team APP

HomemadeMbed.cpp@21:a111be2582be, 2017-01-18 (annotated)

Committer:
dupm2216
Date:
Wed Jan 18 02:38:05 2017 +0000
Revision:
21:a111be2582be
Parent:
16:c77e34bc69bc 
Add code header

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dupm2216 21:a111be2582be 1 /////////////////////////////////////////////////////////////
dupm2216 21:a111be2582be 2 // APP 1: Systèmes à microprocesseurs //
dupm2216 21:a111be2582be 3 // //
dupm2216 21:a111be2582be 4 // Université de Sherbrooke //
dupm2216 21:a111be2582be 5 // Génie informatique //
dupm2216 21:a111be2582be 6 // Session 5, Hiver 2017 //
dupm2216 21:a111be2582be 7 // //
dupm2216 21:a111be2582be 8 // Date: 17 janvier 2017 //
dupm2216 21:a111be2582be 9 // //
dupm2216 21:a111be2582be 10 // Auteurs: Maxime Dupuis, dupm2216 //
dupm2216 21:a111be2582be 11 // Bruno Allaire-Lemay, allb2701 //
dupm2216 21:a111be2582be 12 /////////////////////////////////////////////////////////////
dupm2216 21:a111be2582be 13
GaiSensei 13:bb9669053eb3 14 #include "HomemadeMbed.hpp"
GaiSensei 13:bb9669053eb3 15 #include "Utility.hpp"
dupm2216 15:b38d9d210e32 16 #include <cassert>
dupm2216 15:b38d9d210e32 17 #include "mbed.h"
GaiSensei 13:bb9669053eb3 18
GaiSensei 13:bb9669053eb3 19 namespace homemade_mbed
GaiSensei 13:bb9669053eb3 20 {
GaiSensei 14:2f89279586cb 21 unsigned int read_bits(unsigned int* address_4_bytes, const int start_bit, const int stop_bit)
GaiSensei 13:bb9669053eb3 22 {
GaiSensei 13:bb9669053eb3 23 const unsigned int all_4_bytes = *address_4_bytes;
GaiSensei 13:bb9669053eb3 24 const unsigned int left_shifted = all_4_bytes << (31 - stop_bit);
GaiSensei 13:bb9669053eb3 25 const unsigned int right_shifted = left_shifted >> (31 - stop_bit + start_bit);
GaiSensei 13:bb9669053eb3 26 return right_shifted;
GaiSensei 13:bb9669053eb3 27 }
GaiSensei 13:bb9669053eb3 28
GaiSensei 14:2f89279586cb 29 void write_bits(unsigned int* address_4_bytes, const int start_bit, const int stop_bit, const unsigned int new_value)
GaiSensei 13:bb9669053eb3 30 {
GaiSensei 13:bb9669053eb3 31 const unsigned int all_4_bytes = *address_4_bytes;
dupm2216 15:b38d9d210e32 32 const unsigned int reserved_bits_mask = get_reserved_bits_mask(address_4_bytes);
dupm2216 15:b38d9d210e32 33 const unsigned int new_bits = utility::update_bits(all_4_bytes, start_bit, stop_bit, reserved_bits_mask, new_value);
GaiSensei 13:bb9669053eb3 34 *address_4_bytes = new_bits;
dupm2216 15:b38d9d210e32 35
dupm2216 15:b38d9d210e32 36 assert(new_value == homemade_mbed::read_bits(address_4_bytes, start_bit, stop_bit));
dupm2216 15:b38d9d210e32 37 }
dupm2216 15:b38d9d210e32 38
dupm2216 15:b38d9d210e32 39 unsigned int get_reserved_bits_mask(unsigned int* address_4_bytes)
dupm2216 15:b38d9d210e32 40 {
dupm2216 15:b38d9d210e32 41 switch((unsigned int)address_4_bytes)
dupm2216 15:b38d9d210e32 42 {
dupm2216 15:b38d9d210e32 43 case 0x400FC1C8: return 0x000003FF;
dupm2216 15:b38d9d210e32 44 case 0x400FC0C4: return 0xEFEFF7DE;
dupm2216 15:b38d9d210e32 45 case 0x4000C000: return 0x000000FF;
dupm2216 15:b38d9d210e32 46 case 0x40098000: return 0x000000FF;
dupm2216 15:b38d9d210e32 47 case 0x4009C000: return 0x000000FF;
dupm2216 15:b38d9d210e32 48 case 0x4009800C: return 0x000000FF;
dupm2216 15:b38d9d210e32 49 case 0x4009C00C: return 0x000000FF;
dupm2216 15:b38d9d210e32 50 case 0x4000C00C: return 0x000000FF;
dupm2216 15:b38d9d210e32 51 case 0x400FC088: return 0x07FF7FFF;
dupm2216 15:b38d9d210e32 52 case 0x4000C008: return 0x000003CF;
dupm2216 15:b38d9d210e32 53 case 0x40098008: return 0x000003CF;
dupm2216 15:b38d9d210e32 54 case 0x4007C008: return 0x000000CF;
dupm2216 16:c77e34bc69bc 55 case 0x4001000C: return 0x000000FF;
dupm2216 16:c77e34bc69bc 56 case 0x40010000: return 0x000000FF;
dupm2216 16:c77e34bc69bc 57 case 0x40010004: return 0x000000FF;
dupm2216 16:c77e34bc69bc 58 case 0x400FC1A8: return 0xFFF3F3FF;
dupm2216 16:c77e34bc69bc 59 case 0x40010008: return 0x000000CF;
dupm2216 16:c77e34bc69bc 60 case 0x4002C000: return 0xFFFFFFFF;
dupm2216 15:b38d9d210e32 61 default: break; //Unknown address. Should never happen
dupm2216 15:b38d9d210e32 62 }
dupm2216 15:b38d9d210e32 63
dupm2216 15:b38d9d210e32 64 //Crash
dupm2216 15:b38d9d210e32 65 printf("Unknown address: %d\r\n", (unsigned int)address_4_bytes);
dupm2216 16:c77e34bc69bc 66 utility::blink();
dupm2216 16:c77e34bc69bc 67 return 0x00000000;
GaiSensei 13:bb9669053eb3 68 }
GaiSensei 13:bb9669053eb3 69 }