参数资料
型号: 20-151-0178
厂商: Rabbit Semiconductor
文件页数: 82/162页
文件大小: 0K
描述: CABLE CONVERTER RS-232 TO USB
标准包装: 1
附件类型: USB 至 RS232 适配器
适用于相关产品: 基于 Rabbit 的板
产品目录页面: 619 (CN2011-ZH PDF)
其它名称: 20-151-0178-ND
316-1181
The rest of this section will detail the main changes that have been made to this program. In fact, you
should delete the entire main while loop in speaker_tone.c, since we will be replacing it. For conve-
nience, here is the complete listing for the new while loop.
while (1) {
costate {
switch_pressed = NULL;
while (!switch_pressed) {
// Check for a switch pressed. When we detect one, then save off the pin structure
// for the switch pressed, the pin structure for the corresponding LED, and the number
// of the switch pressed.
if (flexDigIn(&flex_digin31)) {
switch_pressed = &flex_digin31;
led = &flex_digout32;
switchnum = 1;
}
else if (flexDigIn(&flex_digin33)) {
switch_pressed = &flex_digin33;
led = &flex_digout34;
switchnum = 2;
}
else if (flexDigIn(&flex_digin35)) {
switch_pressed = &flex_digin35;
led = &flex_digout36;
switchnum = 3;
}
else if (flexDigIn(&flex_digin37)) {
switch_pressed = &flex_digin37;
led = &flex_digout38;
switchnum = 4;
}
}
// Wait 50 ms to make sure the switch stays pressed (debouncing)
waitfor(DelayMs(50));
// Check if the switch is still pressed
if (flexDigIn(switch_pressed) == 1) {
// Light the corresponding output LED
flexDigOut(led, 0);
// Play the tone
flexToneLoad(tones[switchnum], tone_len[switchnum],
REPEAT_TONE);
76
Applications Programming
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