From 6af21e6a4f2251e71353562d5df7f376fdffc270 Mon Sep 17 00:00:00 2001 From: Freya Murphy Date: Tue, 25 Mar 2025 17:36:52 -0400 Subject: initial checkout from wrc --- user/progDE.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 user/progDE.c (limited to 'user/progDE.c') diff --git a/user/progDE.c b/user/progDE.c new file mode 100644 index 0000000..a1aa0b3 --- /dev/null +++ b/user/progDE.c @@ -0,0 +1,56 @@ +#include + +/** +** User function main #2: write +** +** Prints its ID, then loops N times delaying and printing, then returns +** without calling exit(). Verifies the return byte count from each call +** to write(). +** +** Invoked as: main2 x n +** where x is the ID character +** n is the iteration count +*/ + +USERMAIN( main ) { + int n; + int count = 30; // default iteration count + char ch = '2'; // default character to print + char buf[128]; + + // process the command-line arguments + switch( argc ) { + case 3: count = str2int( argv[2], 10 ); + // FALL THROUGH + case 2: ch = argv[1][0]; + break; + default: + sprint( buf, "main2: argc %d, args: ", argc ); + cwrites( buf ); + for( int i = 0; i <= argc; ++i ) { + sprint( buf, " %s", argv[argc] ? argv[argc] : "(null)" ); + cwrites( buf ); + } + cwrites( "\n" ); + } + + // announce our presence + n = swritech( ch ); + if( n != 1 ) { + sprint( buf, "== %c, write #1 returned %d\n", ch, n ); + cwrites( buf ); + } + + // iterate and print the required number of other characters + for( int i = 0; i < count; ++i ) { + DELAY(STD); + n = swritech( ch ); + if( n != 1 ) { + sprint( buf, "== %c, write #2 returned %d\n", ch, n ); + cwrites( buf ); + } + } + + // all done! + return( 0 ); +} -- cgit v1.2.3-freya