2 * SysEx message encoder for Roland MT-32
3 * Copyright © 2020 František Kučera (Frantovo.cz, GlobalCode.info)
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, version 3 of the License.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 * Translates text from standard input to a hex-formatted System Exclusive (SysEx) message for Roland MT-32,
22 * which instructs the unit to show given text on the display.
24 * Roland MT-32 is capable to display 20 characters.
25 * Longer messages are silently truncated by the MT-32 unit (this software does not check the length).
27 * The SysEx message contains a checksum.
28 * If the checksum is wrong, the MT-32 unit shows the "Exc. Checksum error" message for few seconds
29 * and then returns back to the default screen.
31 * Only printable ASCII characters are supported. Other characters (bytes) are replaced by "."
33 * Some characters are displayed differently:
39 * amidi --port="hw:2,0,0" --send-hex="$(echo -n ' Run GNU/Linux ' | ./mt-32-display )"
40 * while read message; do amidi --port="hw:2,0,0" --send-hex="$(echo -n "$message" | ./mt-32-display )"; done
46 int main(int argc, char**argv) {
47 std::cout << "f0 41 10 16 12 20 00 00 ";
48 std::cout << std::hex << std::setfill('0');
52 // 20 00 00 = display message
57 for (char ch; std::cin.read(&ch, 1).good();) {
58 if (ch < 32 || ch > 126) ch = '.';
59 std::cout << std::setw(2) << ((int) ch) << " ";
65 std::cout << std::setw(2) << sum;
68 std::cout << std::endl;