Hello NXP team !
I'm working on devBoard S32K3x4EVB-Q172 and I'm trying to figure out how FlexCAN does work.
I have a question regarding FlexCAN_Ip_ConfigRxMb() function.
Of what I've read so far and of what I've tested so far I understand that FlexCAN_Ip_ConfigRxMb() function does set-up the receive message buffer.
But I can not find what role does the uint32 msg_id parameter have.As far I can understand that it is used to filter the ID of a frame in order to read or not a frame.
1. Is there any option to disable this feature ?
2. Is there any way to read all incoming CAN frames without filtering by their CAN-ID ?
3. Is there any documentation or training matterial regarding the FlexCAN ?
My configuration setup is as simple as it can get. I'm attaching the code that I'm using in order to test and validate CAN functionality.
#include "Mcal.h"
#include "Clock_Ip.h"
#include "FlexCAN_Ip.h"
#include "IntCtrl_Ip.h"
#include "Siul2_Dio_Ip.h"
#include "Siul2_Port_Ip.h"
#define MSG_ID 0x601//20u
#define RX_MB_IDX 1U
#define TX_MB_IDX 0U
volatile int exit_code = 0;
uint8 dummyData[8] = {1,2,3,4,5,6,7};
volatile uint8_t i = 0;
extern void CAN0_ORED_0_31_MB_IRQHandler(void);
int main(void)
{
/* Write your code here */
Clock_Ip_Init(&Clock_Ip_aClockConfig[0]);
Siul2_Port_Ip_Init(NUM_OF_CONFIGURED_PINS0, g_pin_mux_InitConfigArr0);
//Put the transeiver to Normal Mode
Siul2_Dio_Ip_WritePin(CAN_EN_PORT , CAN_EN_PIN , 1);
Siul2_Dio_Ip_WritePin(CAN_nSTB_PORT, CAN_nSTB_PIN, 1);
IntCtrl_Ip_EnableIrq(FlexCAN0_1_IRQn);
IntCtrl_Ip_InstallHandler(FlexCAN0_1_IRQn, CAN0_ORED_0_31_MB_IRQHandler, NULL_PTR);
Flexcan_Ip_DataInfoType rx_info = {
.msg_id_type = FLEXCAN_MSG_ID_STD,
.data_length = 8u,
.is_polling = TRUE,
.is_remote = FALSE
};
Flexcan_Ip_MsgBuffType rxData;
FlexCAN_Ip_Init(INST_FLEXCAN_0, &FlexCAN_State0, &FlexCAN_Config0);
FlexCAN_Ip_SetStartMode(INST_FLEXCAN_0);
FlexCAN_Ip_ConfigRxMb(INST_FLEXCAN_0, RX_MB_IDX, &rx_info, 0);
rx_info.is_polling = FALSE;
while(1)
{
// FlexCAN_Ip_Send(INST_FLEXCAN_0, TX_MB_IDX, &rx_info, MSG_ID, (uint8 *)&dummyData);
FlexCAN_Ip_Receive(INST_FLEXCAN_0, RX_MB_IDX, &rxData, TRUE);
if(FlexCAN_Ip_GetTransferStatus(INST_FLEXCAN_0, RX_MB_IDX) != FLEXCAN_STATUS_SUCCESS)
{
__asm__ ("nop");
FlexCAN_Ip_MainFunctionRead(INST_FLEXCAN_0, RX_MB_IDX);
}
// for (i= 0; i < 7; i++)
// {
// dummyData[i]+= 1;
// }
}
FlexCAN_Ip_SetStopMode(INST_FLEXCAN_0);
FlexCAN_Ip_Deinit(INST_FLEXCAN_0);
return 0;
}
My peripheral configurations are located in the image bellow:
Kind regards,
kyf
