TC397 ASCLIN_LIN DMA

[xiaoxuan]

Hello,

I am trying to use DMA to communicate with ASCLIN_LIN. I have met some difficulties and need help.

Failed to receive or send LIN data, and failed to enter the interrupt function

Can you help me see what's wrong with the program

DMA_Init

{
/* Initialize one instance of IfxAsclin_Lin_Config with default values */
IfxAsclin_Lin_Config linMasterConfig1;
IfxAsclin_Lin_initModuleConfig(&linMasterConfig1, &MODULE_ASCLIN1);
linMasterConfig1.linMode = IfxAsclin_LinMode_master; /* Set the LIN mode of operation */
linMasterConfig1.brg.baudrate = EC_LINB_BRT; /* Set the desired baud rate */
linMasterConfig1.data.checksum = EC_LINB_CheckSumType; /* Checksum Type*/
linMasterConfig1.isInterruptMode = TRUE;
linMasterConfig1.interrupt.rxPriority = IFX_INTPRIO_ASCLIN1_RX;
linMasterConfig1.interrupt.txPriority = IFX_INTPRIO_ASCLIN1_TX;
linMasterConfig1.interrupt.typeOfService = IfxSrc_Tos_cpu0 ;
const IfxAsclin_Lin_Pins pins =
{
&LIN_B_RX_PIN, IfxPort_InputMode_pullUp, /* RX port pin */
&LIN_B_TX_PIN, IfxPort_OutputMode_pushPull, /* TX port pin */
IfxPort_PadDriver_cmosAutomotiveSpeed4
};
linMasterConfig1.pins = &pins; /* Port pins configuration */
/* Initialize module */
IfxCpu_Irq_installInterruptHandler(&DMA_ISR_LinB_rx, IFX_INTPRIO_ASCLIN1_RX);
IfxCpu_Irq_installInterruptHandler(&DMA_ISR_LinB_tx, IFX_INTPRIO_ASCLIN1_RX);
IfxAsclin_Lin_initModule(&g_linMaster1, &linMasterConfig1);
volatile Ifx_SRC_SRCR *src=IfxAsclin_getSrcPointerRx(linMasterConfig1.asclin);
IfxSrc_init(src, IfxSrc_Tos_dma, IFX_INTPRIO_ASCLIN1_RX);
IfxSrc_enable(src);
volatile Ifx_SRC_SRCR * src1 = IfxAsclin_getSrcPointerTx(linMasterConfig1.asclin);
IfxSrc_init(src1, IfxSrc_Tos_dma, IFX_INTPRIO_ASCLIN1_TX);
IfxAsclin_enableRxFifoFillLevelFlag(linMasterConfig1.asclin, TRUE);
IfxSrc_enable(src1);
}

LIN_Init

{
/* Initialize one instance of IfxAsclin_Lin_Config with default values */
IfxAsclin_Lin_Config linMasterConfig1;
IfxAsclin_Lin_initModuleConfig(&linMasterConfig1, &MODULE_ASCLIN1);
linMasterConfig1.linMode = IfxAsclin_LinMode_master; /* Set the LIN mode of operation */
linMasterConfig1.brg.baudrate = EC_LINB_BRT; /* Set the desired baud rate */
linMasterConfig1.data.checksum = EC_LINB_CheckSumType; /* Checksum Type*/
linMasterConfig1.isInterruptMode = TRUE;
linMasterConfig1.interrupt.rxPriority = IFX_INTPRIO_ASCLIN1_RX;
linMasterConfig1.interrupt.txPriority = IFX_INTPRIO_ASCLIN1_TX;
linMasterConfig1.interrupt.typeOfService = IfxSrc_Tos_cpu0 ;
const IfxAsclin_Lin_Pins pins =
{
&LIN_B_RX_PIN, IfxPort_InputMode_pullUp, /* RX port pin */
&LIN_B_TX_PIN, IfxPort_OutputMode_pushPull, /* TX port pin */
IfxPort_PadDriver_cmosAutomotiveSpeed4
};
linMasterConfig1.pins = &pins; /* Port pins configuration */
/* Initialize module */
IfxCpu_Irq_installInterruptHandler(&DMA_ISR_LinB_rx, IFX_INTPRIO_ASCLIN1_RX);
IfxCpu_Irq_installInterruptHandler(&DMA_ISR_LinB_tx, IFX_INTPRIO_ASCLIN1_RX);
IfxAsclin_Lin_initModule(&g_linMaster1, &linMasterConfig1);
volatile Ifx_SRC_SRCR *src=IfxAsclin_getSrcPointerRx(linMasterConfig1.asclin);
IfxSrc_init(src, IfxSrc_Tos_dma, IFX_INTPRIO_ASCLIN1_RX);
IfxSrc_enable(src);
volatile Ifx_SRC_SRCR * src1 = IfxAsclin_getSrcPointerTx(linMasterConfig1.asclin);
IfxSrc_init(src1, IfxSrc_Tos_dma, IFX_INTPRIO_ASCLIN1_TX);
IfxAsclin_enableRxFifoFillLevelFlag(linMasterConfig1.asclin, TRUE);
IfxSrc_enable(src1);
}

[Prudhvi_E]

Hello,

Please refer to below code examples:

https://github.com/Infineon/AURIX_code_examples/tree/master/code_examples/ASCLIN_LIN_Master_1_KIT_TC...

https://github.com/Infineon/AURIX_code_examples/tree/master/code_examples/UART_DMA_Transfer_1_KIT_TC...

Please use the first one for ASCLIN_LIN Initialization followed by the second example for DMA. You may adapt the second example to use LIN instead of UART.

Regards,

Prudhvi.

[xiaoxuan]

Thank you very much  

But the initialization of the first example, ASCLIN_LIN, has no setting for interrupts.  DMA initialization in the second example is using a hardware interrupt, please use hardware interrupt just below the  CFG.HardwareRequestEnabled = TRUE;  Is that enough?  How is a hardware interrupt triggered? 

[Prudhvi_E]

Hello,

Setting the "CFG.HardwareRequestEnabled" alone to "TRUE" is not enough, please analyze the complete DMA Init function and wherever the UART  specific configurations are done, it shall be adapted accordingly with LIN.

Regards,

Prudhvi.