CAN_DEVCTL_DEBUG_INFO
QNX SDP8.0Devctl and Ioctl CommandsDeveloper
Get debugging information
Synopsis:
#include <sys/can_dcmd.h>
#define CAN_DEVCTL_DEBUG_INFO __DION(_DCMD_MISC, CAN_CMD_CODE + 101)
Arguments to devctl():
| Argument | Value |
|---|---|
| filedes | A file descriptor that you obtained by opening the device |
| dcmd | CAN_DEVCTL_DEBUG_INFO |
| dev_data_ptr | NULL |
| n_bytes | 0 |
| dev_info_ptr | NULL |
Description:
This command asks the driver to display debugging information. The information depends on the type of device, but typically includes the registers and mailbox memory, and is sent to stderr. For more information, see src/hardware/can/board_name/board_namecan.readme in your Board Support Package.
Input:
None.
Output:
None.
Example:
int ret;
if( (fd = open( "/dev/can1/rx0", O_RDWR)) == -1 )
{
printf("open of %s failed \n", devname);
exit(EXIT_FAILURE);
}
if (EOK != (ret = devctl(fd, CAN_DEVCTL_DEBUG_INFO, NULL, 0, NULL)))
{
fprintf(stderr, "devctl CAN_DEVCTL_DEBUG_INFO: %s\n", strerror(ret));
}
See also:
devctl() in the QNX OS C Library Reference
canctl in the Utilities Reference
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