nam taek moo / Mbed OS mbed-os-snippet-Serial_LEDControl

a

main.cpp@0:e08f7610c886, 2020-11-19 (annotated)

Committer:
tmnam0
Date:
Thu Nov 19 06:59:11 2020 +0000
Revision:
0:e08f7610c886
a

Who changed what in which revision?

UserRevisionLine numberNew contents of line
tmnam0 0:e08f7610c886 1 /*
tmnam0 0:e08f7610c886 2 * Copyright (c) 2006-2020 Arm Limited and affiliates.
tmnam0 0:e08f7610c886 3 * SPDX-License-Identifier: Apache-2.0
tmnam0 0:e08f7610c886 4 */
tmnam0 0:e08f7610c886 5
tmnam0 0:e08f7610c886 6 #include "mbed.h"
tmnam0 0:e08f7610c886 7
tmnam0 0:e08f7610c886 8 static BufferedSerial pc(USBTX, USBRX); // tx, rx
tmnam0 0:e08f7610c886 9 PwmOut led(LED1);
tmnam0 0:e08f7610c886 10
tmnam0 0:e08f7610c886 11 float brightness = 0.0;
tmnam0 0:e08f7610c886 12
tmnam0 0:e08f7610c886 13 int main()
tmnam0 0:e08f7610c886 14 {
tmnam0 0:e08f7610c886 15 char msg[] = "Press 'u' to turn LED1 brightness up, 'd' to turn it down\n";
tmnam0 0:e08f7610c886 16 char *c = new char[1];
tmnam0 0:e08f7610c886 17 pc.write(msg, sizeof(msg));
tmnam0 0:e08f7610c886 18
tmnam0 0:e08f7610c886 19 while (1) {
tmnam0 0:e08f7610c886 20 pc.read(c, sizeof(c));
tmnam0 0:e08f7610c886 21 pc.write(c, sizeof(c));
tmnam0 0:e08f7610c886 22 if ((*c == 'u') && (brightness < 0.5)) {
tmnam0 0:e08f7610c886 23 brightness += 0.01;
tmnam0 0:e08f7610c886 24 led = brightness;
tmnam0 0:e08f7610c886 25 }
tmnam0 0:e08f7610c886 26 if ((*c == 'd') && (brightness > 0.0)) {
tmnam0 0:e08f7610c886 27 brightness -= 0.01;
tmnam0 0:e08f7610c886 28 led = brightness;
tmnam0 0:e08f7610c886 29 }
tmnam0 0:e08f7610c886 30 }
tmnam0 0:e08f7610c886 31
tmnam0 0:e08f7610c886 32 }