openMV连接mega,arduino串口监视器一般收不到信号,偶尔能收到,openMV一般能收到。
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openMV的测试程序:# UART Control
This example shows how to use the serial port on your OpenMV Cam. Attach pin
P4 to the serial input of a serial LCD screen to see "Hello World!" printed
on the serial LCD display.
import time
from pyb import UARTAlways pass UART 3 for the UART number for your OpenMV Cam.
The second argument is the UART baud rate. For a more advanced UART control
example see the BLE-Shield driver.
uart = UART(3, 19200)
while(True):
uart.write("Hello World!\r")
time.sleep(1000)mega程序:
int incomingByte;
void setup() {
Serial.begin(19200);
}void loop() {
incomingByte=Serial.read(); Serial.println(incomingByte);
}
接线按照教程里接的,没有问题,求解释,感激感激,跟ttl信号电压有关吗?
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OpenMV 是3.3v的电压,但是接收到5v会认为是1而不会烧毁。
Arduino mega是5v电压,接收到3.3v的电压,一般会认为是1。
建议用示波器看一下具体的信号。
不过还是建议加一个3.3v转5v的转换电路。
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感谢,我用due也试了一下,效果感觉也不好,我明天再去琢磨一下,感谢感谢
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@kidswong999 感谢,我用due也试了一下,效果感觉也不好,我明天再去琢磨一下,感谢感谢