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Improve terminal write usage message

This commit is contained in:
Stefan Rueger 2022-07-12 11:40:40 +01:00
parent 0b2f38c67d
commit ddffabe86a
1 changed files with 27 additions and 4 deletions
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31
src/term.c
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@ -523,10 +523,33 @@ static int cmd_write(PROGRAMMER * pgm, struct avrpart * p,
{
if (argc < 4) {
avrdude_message(MSG_INFO,
"Usage: write <memtype> <start addr> <data1> <data2> <dataN>\n"
" write <memtype> <start addr> <no. bytes> <data1> <dataN> <...>\n\n"
" Add a suffix to manually specify the size for each field:\n"
" HH/hh: 8-bit, H/h/S/s: 16-bit, L/l: 32-bit, LL/ll: 64-bit, F/f: 32-bit float\n");
"Usage: write <memory> <addr> <data>[,] {<data>[,]} \n"
" write <memory> <addr> <len> <data>[,] {<data>[,]} ...\n"
"\n"
"Ellipsis ... writes <len> bytes padded by repeating the last <data> item.\n"
"\n"
"<data> can be hexadecimal, octal or decimal integers, double, float or\n"
"C-style strings and chars. For numbers, an optional case-insensitive suffix\n"
"specifies the data size: HH: 8 bit, H/S: 16 bit, L: 32 bit, LL: 64 bit, F:\n"
"32-bit float. Hexadecimal floating point notation is supported. The\n"
"ambiguous trailing F in 0x1.8F makes the number be interpreted as double;\n"
"use a zero exponent as in 0x1.8p0F to denote a hexadecimal float.\n"
"\n"
"An optional U suffix makes a number unsigned. Ordinary 0x hex numbers are\n"
"always treated as unsigned. +0x or -0x hex numbers are treated as signed\n"
"unless they have a U suffix. Unsigned integers cannot be larger than 2^64-1.\n"
"If n is an unsigned integer then -n is also a valid unsigned integer as in C.\n"
"Signed integers must fall into the [-2^63, 2^63-1] range or a correspondingly\n"
"smaller range when a suffix specifies a smaller type. Out of range signed\n"
"numbers trigger a warning.\n"
"\n"
"Ordinary 0x hex numbers with n hex digits (counting leading zeros) use\n"
"the smallest size of 1, 2, 4 and 8 bytes that can accommodate any n-digit hex\n"
"number. If a suffix specifies a size explicitly the corresponding number of\n"
"least significant bytes are written. Otherwise, signed and unsigned integers\n"
"alike occupy the smallest of 1, 2, 4, or 8 bytes needed to accommodate them\n"
"in their respective representation.\n"
);
return -1;
}