Fabio Fumi / Mbed 2 deprecated Sharp_ce140f_emul

Emulator for the Sharp CE-140F Diskette Driver

Dependencies:   mbed SDFileSystem

This is an attempt (for the time being, it isn't complete yet!) of emulating the Sharp CE-140F disk drive with a Nucleo board, attached to a Sharp Pocket Computer though its platform-proprietary 11-pin interface.

commands.cpp@8:70f13d97eb44, 21 months ago (annotated)

Committer:
ffxx68
Date:
Tue Jul 19 14:03:08 2022 +0000
Revision:
8:70f13d97eb44
Parent:
7:0243d36a655a 
minor change

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ffxx68 7:0243d36a655a 1 #include "commands.h"
ffxx68 7:0243d36a655a 2 #include "SDFileSystem.h"
ffxx68 7:0243d36a655a 3
ffxx68 7:0243d36a655a 4 volatile char inDataBuf[BUF_SIZE];
ffxx68 7:0243d36a655a 5 volatile char outDataBuf[BUF_SIZE];
ffxx68 7:0243d36a655a 6 volatile uint16_t inBufPosition;
ffxx68 7:0243d36a655a 7 volatile uint16_t outBufPosition;
ffxx68 7:0243d36a655a 8 volatile uint8_t checksum = 0;
ffxx68 7:0243d36a655a 9
ffxx68 7:0243d36a655a 10 extern void debug_log(const char *fmt, ...);
ffxx68 7:0243d36a655a 11 extern RawSerial pc;
ffxx68 7:0243d36a655a 12
ffxx68 7:0243d36a655a 13 int fileCount;
ffxx68 7:0243d36a655a 14
ffxx68 7:0243d36a655a 15 // SD Card
ffxx68 7:0243d36a655a 16 SDFileSystem sd(PB_5, PB_4, PB_3, PA_10, "sd"); // mosi, miso, sclk, cs
ffxx68 7:0243d36a655a 17
ffxx68 7:0243d36a655a 18
ffxx68 7:0243d36a655a 19 char CheckSum(char b) {
ffxx68 7:0243d36a655a 20 checksum = (checksum + b) & 0xff;
ffxx68 7:0243d36a655a 21 return b;
ffxx68 7:0243d36a655a 22 }
ffxx68 7:0243d36a655a 23
ffxx68 7:0243d36a655a 24 void outDataAppend(char b) {
ffxx68 7:0243d36a655a 25 // NB in case we're going to implement a circular output buffer...
ffxx68 7:0243d36a655a 26 // I expect functions appending data to be faster than the
ffxx68 7:0243d36a655a 27 // consumer (outNibbleSend, increasing outDataPointer every about 10 ms).
ffxx68 7:0243d36a655a 28 // We should wait here, when outBufPosition reaches outDataPointer,
ffxx68 7:0243d36a655a 29 // for outDataPointer to increase again
ffxx68 7:0243d36a655a 30 outDataBuf[ outBufPosition++ ] = b;
ffxx68 7:0243d36a655a 31 }
ffxx68 7:0243d36a655a 32
ffxx68 7:0243d36a655a 33 void sendString(char* s) {
ffxx68 7:0243d36a655a 34 for (int i=0;i<strlen(s);i++) {
ffxx68 7:0243d36a655a 35 outDataAppend(CheckSum(s[i]));
ffxx68 7:0243d36a655a 36 }
ffxx68 7:0243d36a655a 37 }
ffxx68 7:0243d36a655a 38
ffxx68 7:0243d36a655a 39 /*
ffxx68 7:0243d36a655a 40 QString cleanFileName(QString s) {
ffxx68 7:0243d36a655a 41 QString r = "X:";
ffxx68 7:0243d36a655a 42 r = r + s.left(s.indexOf(".")).leftJustified(8,' ',true) + s.mid(s.indexOf(".")).rightJustified(4,' ',true);
ffxx68 7:0243d36a655a 43 return r;
ffxx68 7:0243d36a655a 44 }
ffxx68 7:0243d36a655a 45 */
ffxx68 7:0243d36a655a 46
ffxx68 7:0243d36a655a 47
ffxx68 7:0243d36a655a 48 void process_FILES_LIST(int cmd) {
ffxx68 7:0243d36a655a 49 // QString fname;
ffxx68 7:0243d36a655a 50
ffxx68 7:0243d36a655a 51 pc.putc('l');
ffxx68 7:0243d36a655a 52 pc.putc(0x30+cmd);
ffxx68 7:0243d36a655a 53 debug_log ("FILES_LIST %d\n", cmd);
ffxx68 7:0243d36a655a 54 outDataAppend(0x00);
ffxx68 7:0243d36a655a 55 checksum=0;
ffxx68 7:0243d36a655a 56
ffxx68 7:0243d36a655a 57 switch (cmd) {
ffxx68 7:0243d36a655a 58 case 0:
ffxx68 7:0243d36a655a 59 fileCount++;
ffxx68 7:0243d36a655a 60 //fname = fileList.at(fileCount);
ffxx68 7:0243d36a655a 61 //debug_log ("*"+cleanFileName(fname)+"*\n");
ffxx68 7:0243d36a655a 62 // Send (cleaned-up) filenames
ffxx68 7:0243d36a655a 63 //sendString(cleanFileName(fname));
ffxx68 7:0243d36a655a 64 sendString("X:TEST .BAS ");
ffxx68 7:0243d36a655a 65 sendString(" ");
ffxx68 7:0243d36a655a 66 // Send CheckSum
ffxx68 7:0243d36a655a 67 outDataAppend(checksum);
ffxx68 7:0243d36a655a 68 break;
ffxx68 7:0243d36a655a 69
ffxx68 7:0243d36a655a 70 case 1:
ffxx68 7:0243d36a655a 71 fileCount--;
ffxx68 7:0243d36a655a 72 //fname = fileList.at(fileCount);
ffxx68 7:0243d36a655a 73 //debug_log ("*"+cleanFileName(fname)+"*\n");
ffxx68 7:0243d36a655a 74 // Send filenames
ffxx68 7:0243d36a655a 75 //sendString(cleanFileName(fname));
ffxx68 7:0243d36a655a 76 sendString("X:TEST .BAS ");
ffxx68 7:0243d36a655a 77 sendString(" ");
ffxx68 7:0243d36a655a 78 // Send CheckSum
ffxx68 7:0243d36a655a 79 outDataAppend(checksum);
ffxx68 7:0243d36a655a 80 break;
ffxx68 7:0243d36a655a 81 }
ffxx68 7:0243d36a655a 82 }
ffxx68 7:0243d36a655a 83
ffxx68 7:0243d36a655a 84
ffxx68 7:0243d36a655a 85 void process_FILES(void) {
ffxx68 7:0243d36a655a 86
ffxx68 7:0243d36a655a 87 struct dirent* ent;
ffxx68 7:0243d36a655a 88 DIR *dir;
ffxx68 7:0243d36a655a 89 char n_files = 0x00;
ffxx68 7:0243d36a655a 90 char *ext_pos;
ffxx68 7:0243d36a655a 91
ffxx68 7:0243d36a655a 92 debug_log ( "FILES\n" );
ffxx68 7:0243d36a655a 93 pc.putc('f');
ffxx68 7:0243d36a655a 94 outDataAppend(CheckSum(0x00));
ffxx68 7:0243d36a655a 95 // Send nb files, from specified dir (with wildcards)
ffxx68 7:0243d36a655a 96 /*
ffxx68 7:0243d36a655a 97 QString s ="";
ffxx68 7:0243d36a655a 98 for (int i =3;i< 15;i++) {
ffxx68 7:0243d36a655a 99 s.append(QChar(data.at(i)));
ffxx68 7:0243d36a655a 100 }
ffxx68 7:0243d36a655a 101 // s="*.BAS";
ffxx68 7:0243d36a655a 102 fileList = directory.entryList( QStringList() << s.replace(" ",""),QDir::Files);
ffxx68 7:0243d36a655a 103 outDataAppend(CheckSum(fileList.size()));
ffxx68 7:0243d36a655a 104 fileCount = -1;
ffxx68 7:0243d36a655a 105 */
ffxx68 7:0243d36a655a 106 if ((dir = opendir ("/sd/")) != NULL) { // ignore files other than BASIC
ffxx68 7:0243d36a655a 107 // print all the files and directories within directory
ffxx68 7:0243d36a655a 108 while ((ent = readdir (dir)) != NULL
ffxx68 7:0243d36a655a 109 && n_files < 0xFF ) { // max 255 files
ffxx68 7:0243d36a655a 110 debug_log("<%s>\n", ent->d_name);
ffxx68 7:0243d36a655a 111 // ignore files other than BASIC (for the timebeing...)
ffxx68 7:0243d36a655a 112 if ( (ext_pos = strstr (ent->d_name, ".BAS")) != 0 ) {
ffxx68 7:0243d36a655a 113 n_files++;
ffxx68 7:0243d36a655a 114 }
ffxx68 7:0243d36a655a 115 }
ffxx68 7:0243d36a655a 116 closedir (dir);
ffxx68 7:0243d36a655a 117 fileCount = -1;
ffxx68 7:0243d36a655a 118 debug_log("%d files\n", n_files);
ffxx68 7:0243d36a655a 119 outDataAppend(CheckSum(n_files));
ffxx68 7:0243d36a655a 120 outDataAppend(checksum);
ffxx68 7:0243d36a655a 121
ffxx68 8:70f13d97eb44 122 // process_FILES_LIST ( 0x00 ); // append first file name by default ?
ffxx68 7:0243d36a655a 123
ffxx68 7:0243d36a655a 124 } else {
ffxx68 7:0243d36a655a 125 // could not open directory
ffxx68 7:0243d36a655a 126 pc.putc('x');
ffxx68 7:0243d36a655a 127 pc.printf("Could not open SD directory\n");
ffxx68 7:0243d36a655a 128 }
ffxx68 7:0243d36a655a 129 }
ffxx68 7:0243d36a655a 130
ffxx68 7:0243d36a655a 131
ffxx68 7:0243d36a655a 132 void ProcessCommand ( void ) {
ffxx68 7:0243d36a655a 133
ffxx68 7:0243d36a655a 134 checksum=0;
ffxx68 7:0243d36a655a 135 outBufPosition = 0;
ffxx68 7:0243d36a655a 136
ffxx68 7:0243d36a655a 137 switch (inDataBuf[0]) {
ffxx68 7:0243d36a655a 138
ffxx68 7:0243d36a655a 139 case 0x05: process_FILES();break;
ffxx68 7:0243d36a655a 140 case 0x06: process_FILES_LIST(0);break;
ffxx68 7:0243d36a655a 141 case 0x07: process_FILES_LIST(1);break;
ffxx68 7:0243d36a655a 142
ffxx68 7:0243d36a655a 143 case 0x1D:
ffxx68 7:0243d36a655a 144 // case 0x1D: process_DSKF();
ffxx68 7:0243d36a655a 145 debug_log ( "DSKF\n" );
ffxx68 7:0243d36a655a 146 outDataAppend(CheckSum(0x00));
ffxx68 7:0243d36a655a 147 outDataAppend(CheckSum(0x02)); // number of byte
ffxx68 7:0243d36a655a 148 outDataAppend(CheckSum(0x50)); // number of 256Bytes free sectors
ffxx68 7:0243d36a655a 149 outDataAppend(CheckSum(0x00));
ffxx68 7:0243d36a655a 150 outDataAppend(0x52); // don't know yet. Perhaps a checksum ?
ffxx68 7:0243d36a655a 151 break;
ffxx68 7:0243d36a655a 152
ffxx68 7:0243d36a655a 153 default:
ffxx68 7:0243d36a655a 154 debug_log ( "Unsupported command (yet...)" );
ffxx68 7:0243d36a655a 155 break;
ffxx68 7:0243d36a655a 156 }
ffxx68 7:0243d36a655a 157
ffxx68 7:0243d36a655a 158 }