To access and retrieve information from a device using the HID API, follow these steps:
Import the HIDAPI library into your project.
Open the HID device using the hid_open() function. This function will return a handle to the device, which you can use to communicate with it.
Send data to the device using the hid_write() function. This function takes the handle to the device and a pointer to the data you want to send.
Receive data from the device using the hid_read() function. This function takes the handle to the device and a buffer to receive the data. The function will block until data is received.
When you are finished communicating with the device, close the handle using the hid_close() function.
Here is an example code snippet that demonstrates how to access and retrieve information from a USB HID device using the HIDAPI library:
#include <hidapi/hidapi.h>
int main(int argc, char* argv[])
{
unsigned char buf[65];
hid_device* handle;
// Open the HID device
handle = hid_open(0x1234, 0x5678, NULL);
// Send data to the device
buf[0] = 0x00;
buf[1] = 0x01;
hid_write(handle, buf, sizeof(buf));
// Receive data from the device
hid_read(handle, buf, sizeof(buf));
// Close the handle
hid_close(handle);
return 0;
}
Asked: 2023-06-12 09:19:11 +0000
Seen: 18 times
Last updated: Jun 12 '23