Choose Cycle Transmit Flexray Frame

Kartoon67 — Thu, 29 Oct 2020 09:02:42 GMT

Hi,

I'm using an MCU 16-bit MC9S12XF512MLM. I have two Freescale developement tool card with the MCU. I would like to transmit an Flexray Frame in 2 or 3 different cycle :

I Explain, for example : I have a frame using slot ID 4, length 16, with data 0x00FF. I would like to send this frame just on the cycle 3 and 10.

You know that there is 64 communication cycle in the flexray protocol, and in my case i would like to send this frame on the same ID but in two different cycle.

Do you know how i can do that? Because with the freescale example which I use with my development tool card, i can't do it.

Here the définition of the configuration of an transmit frame :

const Fr_transmit_buffer_config_type Fr_tx_buffer_slot_01_cfg ={   1,                           // Transmit frame ID   242,                         // Header CRC   16,                          // Payload length   FR_DOUBLE_TRANSMIT_BUFFER,   // Transmit MB buffering   FR_STATE_TRANSMISSION_MODE,  // Transmission mode   FR_STREAMING_COMMIT_MODE,    // Transmission commit mode   FR_CHANNEL_AB,               // Transmit channels   FALSE,                       // Payload preamble   FALSE,                       // Transmit cycle counter filter enable   0,                           // Transmit cycle counter filter value   0,                           // Transmit cycle counter filter mask   TRUE,                        // Transmit MB interrupt enable   TRUE                         // FALSE - interrupt is enabled at commit side, TRUE - interrupt is enabled at transmit side};

And here, the function to tranmist a flexray frame :

Fr_tx_MB_status_type Fr_transmit_data(uint16 Fr_buffer_idx, const uint16 *Fr_data_ptr, uint8 Fr_data_length){    volatile uint16 * FR_DATA_FAR header_MB_ptr;        // Message buffer header pointer    volatile uint16 * FR_DATA_FAR Fr_CC_data_ptr;       // Reference to data array    volatile uint16 temp_value_1 = 0, temp_value_2 = 0; // Temporary variables used for bit operation    volatile uint16 Fr_MB_registers_offset_add_temp; // Temporary offset adress of message buffer registers    uint16 Fr_p;                                        // Temporary counter used for copying        // Temporary offset address of MB registers    Fr_MB_registers_offset_add_temp = Fr_buffer_idx * 4;    // Read the MB Configuration, Control and Status reg.    // Load MBCCSRn register and select only necessary bits    temp_value_1 = (Fr_CC_reg_ptr[FrMBCCSR0 + Fr_MB_registers_offset_add_temp] & 0xF900);    temp_value_1 |= FrMBCCSR_LCKT;              // Set Lock Trigger bit    Fr_CC_reg_ptr[FrMBCCSR0 + Fr_MB_registers_offset_add_temp] = temp_value_1;  // Lock MB        // Read the MB again for checking if the MB is locked    temp_value_2 = Fr_CC_reg_ptr[FrMBCCSR0 + Fr_MB_registers_offset_add_temp];      if(temp_value_2 & FrMBCCSR_LCKS)            // Is the MB locked?    {                                           // Yes        // Clear Transmit Buffer Interrupt Flag            temp_value_2 &= 0xF900;                 // Select only necessary bits            temp_value_2 |= FrMBCCSR_MBIF;          // Set MBIF flag - clear TX MB interrupt flag         Fr_CC_reg_ptr[FrMBCCSR0 + Fr_MB_registers_offset_add_temp] = temp_value_2;  // Clear Transmit Buffer Interrupt Flag        // Load current MB index        Fr_buffer_idx = Fr_CC_reg_ptr[FrMBIDXR0 + Fr_MB_registers_offset_add_temp];        // Calculate the message buffer header         header_MB_ptr = ((volatile uint16 * FR_DATA_FAR)(Fr_HW_config_ptr->CC_FlexRay_memory_base_address) + Fr_buffer_idx * 5);                // Calculate MB Data pointer        Fr_CC_data_ptr = ((volatile uint16 * FR_DATA_FAR)(Fr_HW_config_ptr->CC_FlexRay_memory_base_address) + \                         (header_MB_ptr[3] / 2));        // Test if given data length is not zero, then read length from         if(Fr_data_length == 0)        {            Fr_data_length = (uint8)(header_MB_ptr[1] & 0x007F);   // Load the data payload length value from Frame header register        }                // Copy data        for(Fr_p = 0; Fr_p < Fr_data_length; Fr_p++)        {            Fr_CC_data_ptr[Fr_p] = Fr_data_ptr[Fr_p];   // Copy all items        }                // Set MB to commit        // Load MBCCSRn register and select only necessary bits        temp_value_1 = (Fr_CC_reg_ptr[FrMBCCSR0 + Fr_MB_registers_offset_add_temp] & 0xF900);        temp_value_1 |= FrMBCCSR_CMT;        Fr_CC_reg_ptr[FrMBCCSR0 + Fr_MB_registers_offset_add_temp] = temp_value_1;                // Attempt to unlock MB        // Load MBCCSRn register and select only necessary bits        temp_value_1 = (Fr_CC_reg_ptr[FrMBCCSR0 + Fr_MB_registers_offset_add_temp] & 0xF900);        temp_value_1 |= FrMBCCSR_LCKT;      // Trigger lock/unlock        Fr_CC_reg_ptr[FrMBCCSR0 + Fr_MB_registers_offset_add_temp] = temp_value_1;    }    else    {        // Clear Transmit Buffer Interrupt Flag            // Read MBCCSRn and select only necessary bits        temp_value_2 = (Fr_CC_reg_ptr[FrMBCCSR0 + Fr_MB_registers_offset_add_temp] & 0xF900);        temp_value_2 |= FrMBCCSR_MBIF;          // Set MBIF flag - clear TX MB interrupt flag         Fr_CC_reg_ptr[FrMBCCSR0 + Fr_MB_registers_offset_add_temp] = temp_value_2;  // Clear Transmit Buffer Interrupt Flag        return FR_TXMB_NO_ACCESS;       // The transmit MB has not been successfully locked    }    return FR_TXMB_UPDATED;                 // The transmit MB has been updated with new data}

Thank you in advance,

Best Regards,

Re: Choose Cycle Transmit Flexray Frame

Kartoon67 — Thu, 29 Oct 2020 09:02:44 GMT

Nobody can help me?

I just want to specify the CYCLE for each frame I use:

For example, I have a frame in SLOT 4, which is sending in cycle 0 and the second frame in SLOT 4 too is sending in cycle 3.

I have this configuration frame done by FREESCALE :

const Fr_transmit_buffer_config_type Fr_tx_buffer_slot_01_cfg ={   1,                           // Transmit frame ID   242,                         // Header CRC   16,                          // Payload length   FR_DOUBLE_TRANSMIT_BUFFER,   // Transmit MB buffering   FR_STATE_TRANSMISSION_MODE,  // Transmission mode   FR_STREAMING_COMMIT_MODE,    // Transmission commit mode   FR_CHANNEL_AB,               // Transmit channels   FALSE,                       // Payload preamble   FALSE,                       // Transmit cycle counter filter enable   0,                           // Transmit cycle counter filter value   0,                           // Transmit cycle counter filter mask   TRUE,                        // Transmit MB interrupt enable   TRUE                         // FALSE - interrupt is enabled at commit side, TRUE - interrupt is enabled at transmit side};

Do i have to specify the cycle into this configuration : "0, // Transmit cycle counter filter value"?

What is the purpose of the cycle counter mask??

I really need some help about that, because the freescale documentation can't give me the knowledge I need understanf that.

Thanks in advance,

Regards,

Re: Choose Cycle Transmit Flexray Frame

Kartoon67 — Thu, 29 Oct 2020 09:02:45 GMT

I don't know why but even if I configure Cycle Value. The Freescale example software continu to send my frame in all cycle :

const Fr_transmit_buffer_config_type Fr_tx_buffer_slot_01_cfg ={   1,                           // Transmit frame ID   0x0F2,                        // Header CRC   16,                          // Payload length   FR_SINGLE_TRANSMIT_BUFFER,   // Transmit MB buffering   FR_STATE_TRANSMISSION_MODE,  // Transmission mode   FR_IMMEDIATE_COMMIT_MODE,    // Transmission commit mode   FR_CHANNEL_AB,               // Transmit channels   FALSE,                       // Payload preamble   FALSE,                       // Transmit cycle counter filter enable   0x11,                        // Transmit cycle counter filter value   0x22,                        // Transmit cycle counter filter mask   FALSE,                       // Transmit MB interrupt enable   FALSE                        // FALSE - interrupt is enabled at commit side, TRUE - interrupt is enabled at transmit side};

I'm really disapointed that nobody have an idea to resolve that...

Re: Choose Cycle Transmit Flexray Frame

Lyn — Thu, 19 May 2022 13:59:44 GMT

I encounter the same problem. Do you resolve it?

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