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Finish device init

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mrumel 2022-06-17 11:36:49 -04:00
parent 11deae5454
commit 8febc6762e
1 changed files with 58 additions and 0 deletions
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src/TCAN4550-py/tcan4550.py
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@ -83,6 +83,64 @@ class TCAN4550:
self.MRAMConfiguration.TxEventFIFONumElements = 0 # TX Event FIFO number of elements
self.MRAMConfiguration.TxBufferNumElements = 2 # TX buffer number of elements
self.MRAMConfiguration.TxBufferElementSize = TCAN4x5x_MRAM_Element_Data_Size.MRAM_64_Byte_Data # TX buffer data payload size
/* Configure the MCAN core with the settings above, the changes in this block are write protected registers, *
* so it makes the most sense to do them all at once, so we only unlock and lock once */
TCAN4x5x_MCAN_EnableProtectedRegisters(); // Start by making protected registers accessible
TCAN4x5x_MCAN_ConfigureCCCRRegister(&cccrConfig); // Enable FD mode and Bit rate switching
TCAN4x5x_MCAN_ConfigureGlobalFilter(&gfc); // Configure the global filter configuration (Default CAN message behavior)
TCAN4x5x_MCAN_ConfigureNominalTiming_Simple(&TCANNomTiming);// Setup nominal/arbitration bit timing
TCAN4x5x_MCAN_ConfigureDataTiming_Simple(&TCANDataTiming); // Setup CAN FD timing
TCAN4x5x_MRAM_Clear(); // Clear all of MRAM (Writes 0's to all of it)
TCAN4x5x_MRAM_Configure(&MRAMConfiguration); // Set up the applicable registers related to MRAM configuration
TCAN4x5x_MCAN_DisableProtectedRegisters(); // Disable protected write and take device out of INIT mode
/* Set the interrupts we want to enable for MCAN */
TCAN4x5x_MCAN_Interrupt_Enable mcan_ie = {0}; // Remember to initialize to 0, or you'll get random garbage!
mcan_ie.RF0NE = 1; // RX FIFO 0 new message interrupt enable
TCAN4x5x_MCAN_ConfigureInterruptEnable(&mcan_ie); // Enable the appropriate registers
/* Setup filters, this filter will mark any message with ID 0x055 as a priority message */
TCAN4x5x_MCAN_SID_Filter SID_ID = {0};
SID_ID.SFT = TCAN4x5x_SID_SFT_CLASSIC; // SFT: Standard filter type. Configured as a classic filter
SID_ID.SFEC = TCAN4x5x_SID_SFEC_PRIORITYSTORERX0; // Standard filter element configuration, store it in RX fifo 0 as a priority message
SID_ID.SFID1 = 0x055; // SFID1 (Classic mode Filter)
SID_ID.SFID2 = 0x7FF; // SFID2 (Classic mode Mask)
TCAN4x5x_MCAN_WriteSIDFilter(0, &SID_ID); // Write to the MRAM
/* Store ID 0x12345678 as a priority message */
TCAN4x5x_MCAN_XID_Filter XID_ID = {0};
XID_ID.EFT = TCAN4x5x_XID_EFT_CLASSIC; // EFT
XID_ID.EFEC = TCAN4x5x_XID_EFEC_PRIORITYSTORERX0; // EFEC
XID_ID.EFID1 = 0x12345678; // EFID1 (Classic mode filter)
XID_ID.EFID2 = 0x1FFFFFFF; // EFID2 (Classic mode mask)
TCAN4x5x_MCAN_WriteXIDFilter(0, &XID_ID); // Write to the MRAM
/* Configure the TCAN4550 Non-CAN-related functions */
TCAN4x5x_DEV_CONFIG devConfig = {0}; // Remember to initialize to 0, or you'll get random garbage!
devConfig.SWE_DIS = 0; // Keep Sleep Wake Error Enabled (it's a disable bit, not an enable)
devConfig.DEVICE_RESET = 0; // Not requesting a software reset
devConfig.WD_EN = 0; // Watchdog disabled
devConfig.nWKRQ_CONFIG = 0; // Mirror INH function (default)
devConfig.INH_DIS = 0; // INH enabled (default)
devConfig.GPIO1_GPO_CONFIG = TCAN4x5x_DEV_CONFIG_GPO1_MCAN_INT1; // MCAN nINT 1 (default)
devConfig.FAIL_SAFE_EN = 0; // Failsafe disabled (default)
devConfig.GPIO1_CONFIG = TCAN4x5x_DEV_CONFIG_GPIO1_CONFIG_GPO; // GPIO set as GPO (Default)
devConfig.WD_ACTION = TCAN4x5x_DEV_CONFIG_WDT_ACTION_nINT; // Watchdog set an interrupt (default)
devConfig.WD_BIT_RESET = 0; // Don't reset the watchdog
devConfig.nWKRQ_VOLTAGE = 0; // Set nWKRQ to internal voltage rail (default)
devConfig.GPO2_CONFIG = TCAN4x5x_DEV_CONFIG_GPO2_NO_ACTION; // GPO2 has no behavior (default)
devConfig.CLK_REF = 1; // Input crystal is a 40 MHz crystal (default)
devConfig.WAKE_CONFIG = TCAN4x5x_DEV_CONFIG_WAKE_BOTH_EDGES;// Wake pin can be triggered by either edge (default)
TCAN4x5x_Device_Configure(&devConfig); // Configure the device with the above configuration
TCAN4x5x_Device_SetMode(TCAN4x5x_DEVICE_MODE_NORMAL); // Set to normal mode, since configuration is done. This line turns on the transceiver
TCAN4x5x_MCAN_ClearInterruptsAll(); // Resets all MCAN interrupts (does NOT include any SPIERR interrupts)
def TCAN4x5x_Device_ClearInterrupts(self, ir):
pass