Flexcan implementation in K66f microcontroller - c

Question

I am trying to implement a flexcan communication using a k66f micro controller. As an initial step I just want to send a message through the tx pin. I am basing my program on an example from NXP.
I am very new to C and specially to micro controller programming. The code I run gets stuck in the following line:
/* Wait until CAN Message send out. */
while (!FLEXCAN_GetMbStatusFlags(base, 1 << mbIdx))
{
}
I don't know how exactly the meaning of the code since as I understand, FLEXCAN_GetMbStatusFlags is not a function.
Thanks in advance.
the micro controller is nxp's k66f.
Edit: This is the example
#include "fsl_debug_console.h"
#include "fsl_flexcan.h"
#include "board.h"
#include "pin_mux.h"
#include "clock_config.h"
/*******************************************************************************
* Definitions
******************************************************************************/
#define EXAMPLE_CAN CAN0
#define EXAMPLE_CAN_CLKSRC kCLOCK_BusClk
#define EXAMPLE_FLEXCAN_IRQn CAN0_ORed_Message_buffer_IRQn
#define EXAMPLE_FLEXCAN_IRQHandler CAN0_ORed_Message_buffer_IRQHandler
#define RX_MESSAGE_BUFFER_NUM (8)
#define TX_MESSAGE_BUFFER_NUM (9)
int status;
/*******************************************************************************
* Prototypes
******************************************************************************/
/*******************************************************************************
* Variables
******************************************************************************/
volatile bool rxComplete = false;
flexcan_frame_t txFrame, rxFrame;
/*******************************************************************************
* Code
******************************************************************************/
/*!
* #brief Main function
*/
int main(void)
{
flexcan_config_t flexcanConfig;
flexcan_rx_mb_config_t mbConfig;
/* Initialize board hardware. */
BOARD_InitPins();
BOARD_BootClockRUN();
BOARD_InitDebugConsole();
PRINTF("\r\n==FlexCAN loopback functional example -- Start.==\r\n\r\n");
/* Init FlexCAN module. */
/*
* flexcanConfig.clkSrc = kFLEXCAN_ClkSrcOsc;
* flexcanConfig.baudRate = 125000U;
* flexcanConfig.maxMbNum = 16;
* flexcanConfig.enableLoopBack = false;
* flexcanConfig.enableSelfWakeup = false;
* flexcanConfig.enableIndividMask = false;
* flexcanConfig.enableDoze = false;
*/
FLEXCAN_GetDefaultConfig(&flexcanConfig);
flexcanConfig.clkSrc = kFLEXCAN_ClkSrcPeri;
//flexcanConfig.enableLoopBack = true;
FLEXCAN_Init(EXAMPLE_CAN, &flexcanConfig, CLOCK_GetFreq(EXAMPLE_CAN_CLKSRC));
/* Setup Rx Message Buffer. */
mbConfig.format = kFLEXCAN_FrameFormatStandard;
mbConfig.type = kFLEXCAN_FrameTypeData;
mbConfig.id = FLEXCAN_ID_STD(0x123);
FLEXCAN_SetRxMbConfig(EXAMPLE_CAN, RX_MESSAGE_BUFFER_NUM, &mbConfig, true);
/* Setup Tx Message Buffer. */
FLEXCAN_SetTxMbConfig(EXAMPLE_CAN, TX_MESSAGE_BUFFER_NUM, true);
/* Enable Rx Message Buffer interrupt. */
FLEXCAN_EnableMbInterrupts(EXAMPLE_CAN, 1 << RX_MESSAGE_BUFFER_NUM);
EnableIRQ(EXAMPLE_FLEXCAN_IRQn);
/* Prepare Tx Frame for sending. */
txFrame.format = kFLEXCAN_FrameFormatStandard;
txFrame.type = kFLEXCAN_FrameTypeData;
txFrame.id = FLEXCAN_ID_STD(0x123);
txFrame.length = 8;
txFrame.dataWord0 = CAN_WORD0_DATA_BYTE_0(0x11) | CAN_WORD0_DATA_BYTE_1(0x22) | CAN_WORD0_DATA_BYTE_2(0x33) |
CAN_WORD0_DATA_BYTE_3(0x44);
txFrame.dataWord1 = CAN_WORD1_DATA_BYTE_4(0x55) | CAN_WORD1_DATA_BYTE_5(0x66) | CAN_WORD1_DATA_BYTE_6(0x77) |
CAN_WORD1_DATA_BYTE_7(0x88);
/* Send data through Tx Message Buffer using polling function. */
status=FlEXCAN_TransferSendBlocking(EXAMPLE_CAN, TX_MESSAGE_BUFFER_NUM, &txFrame);
PRINTF("status= %d \r\n", status);
PRINTF("Send message from MB%d to MB%d\r\n", TX_MESSAGE_BUFFER_NUM, RX_MESSAGE_BUFFER_NUM);
PRINTF("tx word0 = 0x%x\r\n", txFrame.dataWord0);
PRINTF("tx word1 = 0x%x\r\n", txFrame.dataWord1);
/* Waiting for Message receive finish. */
while (!rxComplete)
{
}
PRINTF("\r\nReceved message from MB%d\r\n", RX_MESSAGE_BUFFER_NUM);
PRINTF("rx word0 = 0x%x\r\n", rxFrame.dataWord0);
PRINTF("rx word1 = 0x%x\r\n", rxFrame.dataWord1);
/* Stop FlexCAN Send & Receive. */
FLEXCAN_DisableMbInterrupts(EXAMPLE_CAN, 1 << RX_MESSAGE_BUFFER_NUM);
PRINTF("\r\n==FlexCAN loopback functional example -- Finish.==\r\n");
while (1)
{
__WFI();
}
}
void EXAMPLE_FLEXCAN_IRQHandler(void)
{
/* If new data arrived. */
if (FLEXCAN_GetMbStatusFlags(EXAMPLE_CAN, 1 << RX_MESSAGE_BUFFER_NUM))
{
FLEXCAN_ClearMbStatusFlags(EXAMPLE_CAN, 1 << RX_MESSAGE_BUFFER_NUM);
FLEXCAN_ReadRxMb(EXAMPLE_CAN, RX_MESSAGE_BUFFER_NUM, &rxFrame);
rxComplete = true;
}
}