C2000 CAN RX

5 次查看（过去 30 天）
Yusuf Selim KARATAS
回答： UDAYA PEDDIRAJU 2024-8-30
Dear All,
I am using Simulink to build a model to receive CAN messages. You can see diagram below. I am getting "error: expression must have struct or union type" error. Please help me. How can I solve that?
Thanks.
"ykarata1_BMS_C2000_RX_deneme.c", line 67: error: expression must have struct or union type
"ykarata1_BMS_C2000_RX_deneme.c", line 68: error: expression must have struct or union type
"ykarata1_BMS_C2000_RX_deneme.c", line 70: error: expression must have struct or union type
"ykarata1_BMS_C2000_RX_deneme.c", line 71: error: expression must have struct or union type
"ykarata1_BMS_C2000_RX_deneme.c", line 73: error: expression must have struct or union type
/* S-Function (scanunpack): '<S1>/CAN Unpack' */
65 {
66 /* S-Function (scanunpack): '<S1>/CAN Unpack' */
67 if ((1 == ykarata1_BMS_C2000_RX_deneme_B.eCANReceive_o2[0].Length) &&
68 (ykarata1_BMS_C2000_RX_deneme_B.eCANReceive_o2[0].ID != INVALID_CAN_ID)
69 ) {
70 if ((4 == ykarata1_BMS_C2000_RX_deneme_B.eCANReceive_o2[0].ID) && (0U ==
71 ykarata1_BMS_C2000_RX_deneme_B.eCANReceive_o2[0].Extended) ) {
72 (void) memcpy(&ykarata1_BMS_C2000_RX_deneme_B.CANUnpack,
73 ykarata1_BMS_C2000_RX_deneme_B.eCANReceive_o2[0].Data,
74 1 * sizeof(uint8_T));
75 }
76 }
77 }

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回答（1 个）

UDAYA PEDDIRAJU
UDAYA PEDDIRAJU 2024-8-30
Hi Yusuf,
The error "expression must have struct or union type" in your Simulink model indicates a mismatch in data types.
To resolving it:
  1. Ensure that ykarata1_BMS_C2000_RX_deneme_B.eCANReceive_o2[0] and ykarata1_BMS_C2000_RX_deneme_B.CANUnpack have compatible data structures.
  2. Double-check that you're using correct indices to access elements within the eCANReceive_o2 array.
  3. If necessary, cast data to the appropriate type using (struct *) or (union *).

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