Get CAN statistics
#include <sys/can_dcmd.h> #define CAN_DEVCTL_GET_STATS __DIOF(_DCMD_MISC, CAN_CMD_CODE + 100, struct can_devctl_stats)
| Argument | Value |
|---|---|
| filedes | A file descriptor that you obtained by opening the device |
| dcmd | CAN_DEVCTL_GET_STATS |
| dev_data_ptr | A pointer to a struct can_devctl_stats |
| n_bytes | sizeof(struct can_devctl_stats) |
| dev_info_ptr | NULL |
This command gets CAN statistics, including some that you can use to monitor CAN bus issues.
None.
A filled-in struct can_devctl_stats, which is defined in <sys/can_dcmd.h> as follows:
typedef struct can_devctl_stats
{
uint32_t transmitted_frames;
uint32_t received_frames;
uint32_t missing_ack;
uint32_t total_frame_errors;
uint32_t stuff_errors;
uint32_t form_errors;
uint32_t dom_bit_recess_errors;
uint32_t recess_bit_dom_errors;
uint32_t parity_errors;
uint32_t crc_errors;
uint32_t hw_receive_overflows;
uint32_t sw_receive_q_full;
uint32_t error_warning_state_count;
uint32_t error_passive_state_count;
uint32_t bus_off_state_count;
uint32_t bus_idle_count;
uint32_t power_down_count;
uint32_t wake_up_count;
uint32_t rx_interrupts;
uint32_t tx_interrupts;
uint32_t total_interrupts;
} CAN_DEVCTL_STATS;