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DigitalInput1.cpp
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1 #include <stdio.h>
2 #include <unistd.h>
3 
4 #include "../hubolib.h"
5 #include "../hubocfg.h" // Required for changing default I2C device.
6 
7 using namespace HuboLib;
8 
9 /*
10 Compile and link:
11  g++ DigitalInput1.cpp -L../ -lhubo -lpthread -lrt -o DigitalInput1.out
12 Run:
13  sudo ./DigitalInput1.out
14 Purpose:
15  Read digital inputs 0 and 1 and display them in the console.
16  The program will not terminate. Press Ctr-C to exit.
17 */
18 
19 int main(void)
20 {
21  // If required - set the I2C device to work with. The Raspberry Pi uses "/dev/i2c-1" which is default, the Banana Pi uses "/dev/i2c-0"
22  #ifdef BPI
23  g_I2CConfig.m_sI2CDevice = "/dev/i2c-0";
24  #endif
25 
26  // Initialize the library once in your program.
27  Initialize();
28 
29  while (1)
30  {
31  bool bState = false;
32 
33  // Read digital input number 0.
34  Get_DI_Channel(0, bState);
35  printf ("Digital input 0 = %s ", bState ? "ON " : "OFF");
36 
37  // Read digital input number 1.
38  Get_DI_Channel(1, bState);
39  printf ("Digital input 1 = %s \n", bState ? "ON " : "OFF");
40 
41  usleep (1000L * 10L);
42  }
43 
44  // We won't get here - press Ctrl-C to terminate.
45  return 0;
46 }
47 
const char * m_sI2CDevice
Definition: hubocfg.h:48
bool Initialize()
Initializes the library.
int main(void)
I2C_Config g_I2CConfig
bool Get_DI_Channel(int channel, bool &bValue)
Retrieves the value of one digital input.