早上好!最近我买了一块Arduino板,用来在我的房间里做一些“灯光控制”。这是我写的固件代码:
int control = 0;
int pin = 0;
void setup()
{
Serial.begin(9600);
for(pin = 0; pin <= 13; pin++) pinMode(pin, OUTPUT);
}
void loop()
{
control = Serial.read();
if (control > 0 && control <= 13) digitalWrite(control, HIGH);
if (control < 256 && control >= (256-13)) digitalWrite((256-control), LOW);
}
在那之后,我使用Python解释器中的pySerial来控制pin,一切正常。下面是一段解释器输出:
Python 2.6.5 (r265:79063, Apr 16 2010, 13:57:41)
[GCC 4.4.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import serial
>>> ser = serial.Serial('/dev/ttyUSB0', 9600)
>>> ser.write(chr(12))
>>> # The light turned on here
...
>>> ser.write(chr(256-12))
>>> # The light turned off here
...
然后我决定编写一个简单的Python脚本来完成同样的工作:
#!/usr/bin/env python
import serial
import time
ser = serial.Serial('/dev/ttyUSB0', 9600)
ser.write(chr(12))
time.sleep(1)
ser.write(chr(256-12))
但它根本不起作用!Arduino显示在我启动脚本的时候收到了一些东西,但是什么也没有发生。以下是脚本的strace输出:
open("/dev/ttyUSB0", O_RDWR|O_NOCTTY|O_NONBLOCK) = 3
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, {B9600 -opost -isig -icanon -echo ...}) = 0
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, {B9600 -opost -isig -icanon -echo ...}) = 0
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, {B9600 -opost -isig -icanon -echo ...}) = 0
ioctl(3, SNDCTL_TMR_START or TCSETS, {B9600 -opost -isig -icanon -echo ...}) = 0
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, {B9600 -opost -isig -icanon -echo ...}) = 0
open("/dev/ttyUSB0", O_RDWR|O_NOCTTY|O_NONBLOCK) = 4
ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B9600 -opost -isig -icanon -echo ...}) = 0
ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B9600 -opost -isig -icanon -echo ...}) = 0
ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B9600 -opost -isig -icanon -echo ...}) = 0
ioctl(4, SNDCTL_TMR_START or TCSETS, {B9600 -opost -isig -icanon -echo ...}) = 0
ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B9600 -opost -isig -icanon -echo ...}) = 0
write(4, "\f", 1) = 1
close(4) = 0
rt_sigaction(SIGINT, {SIG_DFL, [], SA_RESTORER, 0x7f45cf4c88f0}, {0x4d9820, [], SA_RESTORER, 0x7f45cf4c88f0}, 8) = 0
exit_group(0) = ?
看起来一切都应该很好,所以我不知道会有什么问题。如果您能帮忙,我将不胜感激,非常感谢!
PS当我在PDB下运行程序时,一切正常。海森虫。
更新:我让控制器将它接收到的数据发送给我,当我运行脚本时,它看起来没有接收到任何东西,但是当我从解释器发送数据时,它接收到了所有东西。固件的代码现在如下所示:
int control = 0;
int pin = 0;
void setup()
{
Serial.begin(9600);
for(pin = 0; pin <= 13; pin++) pinMode(pin, OUTPUT);
}
void loop()
{
if (Serial.available() > 0)
{
control = Serial.read();
if (control <= 13) digitalWrite(control, HIGH);
if (control < 256 && control >= (256-13)) digitalWrite((256-control), LOW);
Serial.println(control);
}
}
目前没有回答
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