Other Parts Discussed in Thread: TCAN4550
Tool/software:
Hi,
I am struggling with sending frames on the CANFD using the SPI. Here is my configuration:
- Modes of Operation and Pin Configuration (h0800):
- WAKE_CONFIG = 0b11
- CLK_REF = 0b1
- GPO2_CONFIG = 0b00
- TEST_MODE_EN = 0b0
- nWKRQ_VOLTAGE = 0b0
- FAIL_SAFE_EN = 0b1
- GPO1_GPO_CONFIG = 0b00
- INH_DIS = 0b0
- nWKRQ_CONFIG = 0b0
- MODE_SEL = 0b10
- DEVICE_RESET = 0b0
- SWE_DIS = 0b1
- TEST_MODE_CONFIG = 0b1
- Nominal Bit Timing & Prescaler (h101C):
- NSJW = 0b0000011
- NBRP = 0x00
- NTSEG1 = 0x0A
- NTSEG2 = 0b0000011
- Tx Buffer Configuration (h10C0):
- TFQM = 0b0
- TFQS = 0b000001
- NDTB = 0b000001
- TBSA = 0x8000
- Tx Buffer Element Size Configuration (h10C8):
- TBDS = 0b000
- Tx Event FIFO Configuration (h10F0):
- EFWM = 0b000011
- EFS = 0b000011
- EFSA = 0x8050
- Data Bit Timing & Prescaler (h100C):
- TDC = 0b0
- DBRP = 0b00000
- DTSEG1 = 0b01010
- DTSEG2 = 0b0011
- DSJW = 0b0011
- Control Register (h1018):
- NISO = 0b0
- TXP = 0b0
- EFBI = 0b0
- PXHD = 0b0
- BRSE = 0b1
- FDOE = 0b1
- TEST = 0b0
- DAR = 0b0
- MON = 0b1
- CSR = 0b0
- CSA = 0b0
- ASM = 0b0
- CCE = 0b1
- INIT = 0b1
- Tx Buffer Configuration (h10C0):
- TFQS = 0b00001
- NDTB = 0b00001
- TBSA = 0x8000
The Tx start address is 0x8000 (MRAM). I am writing inside the MRAM at 0x8000 one word. Then I activate the Sending Register (h10D0), the Tx Buffer Request Pending should be 1, but the whole register is 0. If I understand well, that means the TCAN doesn't know it has to send the frame.
FWI: I can read a register I previously configured, meaning I can write and read inside the registers. I double-checked every configuration by reading them, everything is fine on this side.
Do you have any idea to what it can be due ?
Thank you by advance !
