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RL-RTX RL-FlashFS RL-TCPnet RL-CAN Example Programs Library Reference Data Types
BIT BOOL CAN_ERROR CAN_msg FILE S8 S16 S32 S64 U8 U16 U32 U64 Include Files can_cfg.h can_error.h file_config.h net_config.h rtl.h rtx_can.h rtx_config.h stdio.h Reference _alloc_box _calloc_box _declare_box _declare_box8 _free_box _init_box _init_box8 arp_cache_ip CAN_init CAN_receive CAN_request CAN_rx_object CAN_send CAN_set CAN_start CAN_tx_object cgi_func cgi_process_data cgi_process_var com_getchar com_putchar com_tx_active dhcp_disable fanalyse fcheck fclose fdefrag fdelete feof ferror ffind fflush fformat ffree fgetc fgets finit fopen fprintf fputc fputs fread frename fs_EraseSector fs_get_date fs_get_time fs_Init fs_ProgramPage fs_spi_EraseSector fs_spi_Init fs_spi_ProgramPage fs_spi_ReadData fscanf fseek ftell fwrite get_host_by_name http_get_info http_get_lang http_get_session http_get_var igmp_join igmp_leave init_ethernet init_modem init_serial init_TcpNet int_disable_eth int_enable_eth interrupt_ethernet isr_evt_set isr_mbx_check isr_mbx_receive isr_mbx_send isr_sem_send main_TcpNet mci_init mci_read_config mci_read_sect mci_write_sect modem_dial modem_hangup modem_listen modem_online modem_process modem_run os_dly_wait os_evt_clr os_evt_get os_evt_set os_evt_wait_and os_evt_wait_or os_itv_set os_itv_wait os_mbx_check os_mbx_declare os_mbx_init os_mbx_send os_mbx_wait os_mut_init os_mut_release os_mut_wait os_sem_init os_sem_send os_sem_wait os_sys_init os_sys_init_prio os_sys_init_user os_tmr_call os_tmr_create os_tmr_kill os_tsk_create os_tsk_create_ex os_tsk_create_user os_tsk_create_user_ex os_tsk_delete os_tsk_delete_self os_tsk_pass os_tsk_prio os_tsk_prio_self os_tsk_self poll_ethernet ppp_close ppp_connect ppp_is_up ppp_listen rewind send_frame slip_close slip_connect slip_is_up slip_listen smtp_cbfunc smtp_connect spi_hi_speed spi_init spi_send spi_ss tcp_abort tcp_check_send tcp_close tcp_connect tcp_get_buf tcp_get_socket tcp_get_state tcp_listen tcp_max_dsize tcp_release_socket tcp_reset_window tcp_send tftp_fclose tftp_fopen tftp_fread tftp_fwrite timer_tick tnet_cbfunc tnet_ccmp tnet_get_info tnet_msg_poll tnet_process_cmd tnet_set_delay tsk_lock tsk_unlock udp_close udp_get_buf udp_get_socket udp_mcast_ttl udp_open udp_release_socket udp_send ungetc Library Files AppendixCAN_receive
| Summary |
#include <rtx_can.h> CAN_ERROR CAN_receive ( U32 ctrl, /* CAN Controller */ CAN_msg *msg, /* CAN Message */ U16 timeout); /* Time to Wait */ | |||||||||
| Description | The CAN_receive function receives a message on the CAN controller specified by ctrl and copies it into msg. The CAN_receive function does not clear hardware message FIFOs. So, if a message was received prior to invoking CAN_receive, that message is returned immediately. If the message FIFO is empty, CAN_receive waits (up to the specified timeout) for a message to be received.
If a message is not received by the specified time, an error is returned. The CAN_receive function executes quickly since all data transfers use software buffers. Only in situations where the FIFO is empty is the CAN_receive function delayed. The CAN_receive function is part of RL-CAN. The prototype is defined in rtx_can.h. | |||||||||
| Return Value | The CAN_receive function returns one of the following manifest constants.
| |||||||||
| See Also | CAN_send | |||||||||
| Example |
#include <rtx_can.h>
void task_rece_CAN (void) __task
{
CAN_msg msg_buf;
for (;;)
{
// Wait to receive a message.
// When the message arrives
// activate LEDs using data[0]
if (CAN_receive (1, &msg_buf, 0) == 0)
{
LED_Byte (msg_buf.data[0]);
}
}
}
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