Get the priority for transmitted messages
#include <sys/can_dcmd.h> #define CAN_DEVCTL_GET_PRIO __DIOF(_DCMD_MISC, CAN_CMD_CODE + 4, uint32_t)
| Argument | Value |
|---|---|
| filedes | A file descriptor that you obtained by opening the device. This must be for a transmit mailbox (e.g., /dev/can1/tx3). |
| dcmd | CAN_DEVCTL_GET_PRIO |
| dev_data_ptr | A pointer to a uint32_t |
| n_bytes | sizeof(uint32_t) |
| dev_info_ptr | NULL |
This command gets the priority of messages for a transmit mailbox.
None.
The priority.
int ret;
uint32_t val;
if( (fd = open( "/dev/can1/tx3", O_RDWR)) == -1 )
{
printf("open of %s failed \n", devname);
exit(EXIT_FAILURE);
}
if(EOK != (ret = devctl(fd, CAN_DEVCTL_GET_PRIO, &val, sizeof(val), NULL)))
{
fprintf(stderr, "devctl CAN_DEVCTL_GET_PRIO: %s\n", strerror(ret));
} else {
printf("GET_PRIO = %u\n", val);
}