Hi everyone,
i’m trying to connection Seeeduino Stalker 1.2 + Seeed CAN Bus Shield v1.2 + GPS + and a custom board for Air quality.
The CAN bus Shield use SPI communication with pins 2 (INT), 9 (SS), the other pins of MCP2515 are connected to ICSP (MISO, MOSI, SCK)
The Air Quality board communicate with Stalker by a SoftSerial on pins 2 (TX) and 3 (RX).
My PCAN Exlorer Software sends messages to CAN Bus Shield with BitRate = 250 kbit/s, messages ID extended and Cycle Time from 20ms to 1000ms.
Specifically, only 3 messages have a Cycle Time of 20 ms, the other of 300ms, 500ms and 1000ms.
When I use only Stalker and one Shield all works, when I trying to use CAN bus shield with Air Quality nothing work.
Because of shared pin 2, I wanted to pause the CAN bus shield, acquired Air quality data every 5s and then acquire again CAN messages.
I tried:
- to disable interrupts, read Air quality data, and enable it.
- to disable SPI communication, read Air quality, and enable it.
- to use delay
but everything is not succesfull. Can anyone tell me what’s wrong? The code is in the attached file.
Here what I read in the serial monitor with CAN network active, lack environmental data:
CAN BUS Shield init ok!
Time: 79 - ID: 18FF8F03
Time: 147 - ID: 18FF8F03
Time: 217 - ID: 18FF8F03
Time: 284 - ID: 18FF8F03
Time: 354 - ID: 18FF8F03
Time: 421 - ID: 18FF8F03
Time: 489 - ID: 18FF8F03
Time: 559 - ID: 18FF1027
Time: 626 - ID: 18FF8F03
Time: 696 - ID: 18FF8F03
Time: 763 - ID: 18FF8F03
Time: 833 - ID: 18FF8F03
Time: 901 - ID: 18FF9F1E
Time: 970 - ID: 18FF8F03
Time: 1038 - ID: 18FF8F03
Time: 1107 - ID: 18FF9F1E
Time: 1175 - ID: 18FF8F03
Time: 1245 - ID: 18FF8F03
Time: 1312 - ID: 18FF9F1E
Time: 1382 - ID: 18FF8F03
Time: 1449 - ID: 18FF8F03
Time: 1519 - ID: 18FF8F03
Time: 1587 - ID: 18FF8F03
Time: 1656 - ID: 18FF8F03
Time: 1724 - ID: 18FF8F03
Time: 1794 - ID: 18FF8F03
Time: 1861 - ID: 18FF8F03
Time: 1931 - ID: 18FF8F03
Time: 1998 - ID: 18FF8F03
Time: 2068 - ID: 18FF8F03
Time: 2136 - ID: 18FF8F03
Time: 2205 - ID: CFF3F27
Time: 2273 - ID: 18FF8F03
Time: 2342 - ID: 18FF8F03
Time: 2410 - ID: 18FF9F1E
Time: 2480 - ID: 18FF8F03
Time: 2547 - ID: 18FF1027
Time: 2617 - ID: 18FF8F03
Time: 2684 - ID: 18FF8F03
Time: 2754 - ID: 18FF8F03
Time: 2822 - ID: 18FF8F03
Time: 2891 - ID: 18FF8F03
Time: 2961 - ID: 18FF8F03
Time: 3028 - ID: 18FF8F03
Time: 3098 - ID: 18FF8F03
Time: 3166 - ID: 18FF8F03
Time: 3235 - ID: 18FF8F03
Time: 3303 - ID: 18F0010B
Time: 3373 - ID: 18FF8F03
Time: 3440 - ID: 18FF8F03
Time: 3510 - ID: 18FF9F1E
Time: 3577 - ID: 18FF8F03
Time: 3647 - ID: 18FF8F03
Time: 3715 - ID: 18FF8F03
Time: 3784 - ID: 18FF8F03
Time: 3852 - ID: 18FF8F03
Time: 3921 - ID: 18FF8F03
Time: 3989 - ID: 18FF8F03
Time: 4059 - ID: 18FF1027
Time: 4126 - ID: 18FF8F03
Time: 4196 - ID: 18FF8F03
Time: 4263 - ID: 18FF8F03
Time: 4333 - ID: 18FF8F03
Time: 4401 - ID: 18FF9F1E
Time: 4470 - ID: 18FF8F03
Time: 4538 - ID: 18FF8F03
Time: 4608 - ID: CFF3F27
Time: 4675 - ID: 18FF8F03
Time: 4745 - ID: 18FF8F03
Time: 4812 - ID: 18FF9F1E
Time: 4882 - ID: 18FF8F03
Time: 4950 - ID: 18FF8F03
Time: 5019 - ID: 18FF8F03
Time: 5087 - ID: 18FF8F03
Time: 5156 - ID: 18FF8F03
Time: 5224 - ID: 18FF8F03
Time: 5294 - ID: 18FF8F03
Time: 5361 - ID: 18FF8F03
Time: 5431 - ID: 18FF8F03
Here the code without CAN network:
CAN BUS Shield init ok!
Time: 0 - Ambiental data: 0740, 0242, 0455, 000017068, 0016, 0267, 0000, 0196, 0000005, 0740, 0242,000
CAN Message EVCU1_DICO: 000000000
Time: 5000 - Ambiental data: 0740, 0242, 0455, 000017392, 0016, 0265, 0000, 0195, 0000004, 0740, 0242, 0455, 10007
CAN Message EVCU1_DICO: 000000000
Time: 10000 - Ambiental data: 0739, 0242, 0454, 000019903, 0016, 0265, 0000, 0198, 0000006, 0739, 0242, 04662 0
CAN Message EVCU1_DICO: 000000000
Time: 15000 - Ambiental data: 0737, 0242, 0454, 000017946, 0016, 0265, 0000, 0196, 0000004, 0737, 0242, 0401000
CAN Message EVCU1_DICO: 000000000
CAN_e_Ambiente.zip (2.05 KB)