ESP32 Some MCP2515 not response to ESP32

[UnknownPP]

I'm connecting 3 MCP2515 to esp32 each of which Initializing is done After that, some MCP2515 stops are available to esp32.
I measure single CS and INT during not a response to esp32, CS always HIGH and INT always LOW.

My setup
// Init CAN
SPI.begin();

ACAN2515Settings settings1(QUARTZ_FREQUENCY, 500UL * 1000UL); // 500 kpbs
ACAN2515Settings settings2(QUARTZ_FREQUENCY, 500UL * 1000UL); // 500 kpbs
ACAN2515Settings settings3(QUARTZ_FREQUENCY, 500UL * 1000UL); // 500 kpbs

settings1.mRequestedMode = ACAN2515Settings::NormalMode;
settings1.mReceiveBufferSize = 100;
uint16_t errorCode1 = can1.begin(settings1, []
                                 { can1.isr(); });

delay(50);

settings2.mRequestedMode = ACAN2515Settings::NormalMode;
settings2.mReceiveBufferSize = 100;
uint16_t errorCode2 = can2.begin(settings2, []
                                 { can2.isr(); });

delay(50);

settings3.mRequestedMode = ACAN2515Settings::NormalMode;
settings3.mReceiveBufferSize = 100;
uint16_t errorCode3 = can3.begin(settings3, []
                                 { can3.isr(); });

delay(50);

[pierremolinaro]

Hello, Does it work with one MCP2515, or two ? What are the pins you use for connections ? ESP32 has many restrictions on pin using. Note about your code : you can use the same ACAN2515Settings objet for the 3 MCP2515, unles they have different settings. Setting mRequestedMode is useless its default value is ACAN2515Settings::NormalMode. I think delay (50) is not required. So you can write: ACAN2515Settings settings(QUARTZ_FREQUENCY, 500UL * 1000UL); // 500 kpbs settings.mReceiveBufferSize = 100; uint16_t errorCode1 = can1.begin(settings, [] { can1.isr(); }); uint16_t errorCode2 = can2.begin(settings, [] { can2.isr(); }); uint16_t errorCode3 = can3.begin(settings, [] { can3.isr(); }); Kind Regards, Pierre

…

Le 20 mars 2022 à 05:42, UnknownPP ***@***.***> a écrit : I'm connecting 3 MCP2515 to esp32 each of which Initializing is done After that, some MCP2515 stops are available to esp32. I measure single CS and INT during not a response to esp32, CS always HIGH and INT always LOW. My setup // Init CAN SPI.begin(); ACAN2515Settings settings1(QUARTZ_FREQUENCY, 500UL * 1000UL); // 500 kpbs ACAN2515Settings settings2(QUARTZ_FREQUENCY, 500UL * 1000UL); // 500 kpbs ACAN2515Settings settings3(QUARTZ_FREQUENCY, 500UL * 1000UL); // 500 kpbs settings1.mRequestedMode = ACAN2515Settings::NormalMode; settings1.mReceiveBufferSize = 100; uint16_t errorCode1 = can1.begin(settings1, [] { can1.isr(); }); delay(50); settings2.mRequestedMode = ACAN2515Settings::NormalMode; settings2.mReceiveBufferSize = 100; uint16_t errorCode2 = can2.begin(settings2, [] { can2.isr(); }); delay(50); settings3.mRequestedMode = ACAN2515Settings::NormalMode; settings3.mReceiveBufferSize = 100; uint16_t errorCode3 = can3.begin(settings3, [] { can3.isr(); }); delay(50); — Reply to this email directly, view it on GitHub <#34>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AEWKZVBAGKWHIS4TT6ZHOL3VA2UEXANCNFSM5RE633OA>. Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>. You are receiving this because you are subscribed to this thread.

[UnknownPP]

Thank you for your response.

In the first step, I connect three MCP2515 to ESP32.

SPI Pin
MOSI 23
MISO 19
SCK 18

#define CAN1_CS 2
#define CAN2_CS 5
#define CAN3_CS 0
#define CAN1_INT 4
#define CAN2_INT 34
#define CAN3_INT 35

Second, It can be initialized.
Note: Why do I have three settings some devices that I want to logger data have three data lines and baud rates are not the same

ACAN2515Settings settings1(QUARTZ_FREQUENCY, 500UL * 1000UL); // 500 kpbs
ACAN2515Settings settings2(QUARTZ_FREQUENCY, 500UL * 1000UL); // 500 kpbs
ACAN2515Settings settings3(QUARTZ_FREQUENCY, 500UL * 1000UL); // 500 kpbs

uint16_t errorCode1 = can1.begin(settings1, []
{ can1.isr(); });
uint16_t errorCode2 = can2.begin(settings2, []
{ can2.isr(); });
uint16_t errorCode3 = can3.begin(settings3, []
{ can3.isr(); });

Third, It can run for a few minutes after that some MCP2515 does not respond to my ESP32. I measure signal pin CS and INT that do not respond to CS signal always HIGHT and INT signal always LOW.

And final, It has only one or two MCP2515 (usually only one) that responded to ESP32.

Thank you.

[pierremolinaro]

Hello, Handling ESP32 external interrupt can be tricky, may be there is a race condition. Having INT signal always LOW is a bug. It is difficult to solve because my sketches do not highlight this bug. I just reviewed my code, and I may have found a bug. But it's not possible to attach files to mail that goes through GitHub, can you write me directly to ***@***.*** so I can send you the modified ACAN2515.cpp and ACAN2515.h files? Pierre

…

Le 1 avr. 2022 à 04:55, UnknownPP ***@***.***> a écrit : Thank you for your response. In the first step, I connect three MCP2515 to ESP32. SPI Pin MOSI 23 MISO 19 SCK 18 #define CAN1_CS 2 #define CAN2_CS 5 #define CAN3_CS 0 #define CAN1_INT 4 #define CAN2_INT 34 #define CAN3_INT 35 Second, It can be initialized. Note: Why do I have three settings some devices that I want to logger data have three data lines and baud rates are not the same ACAN2515Settings settings1(QUARTZ_FREQUENCY, 500UL * 1000UL); // 500 kpbs ACAN2515Settings settings2(QUARTZ_FREQUENCY, 500UL * 1000UL); // 500 kpbs ACAN2515Settings settings3(QUARTZ_FREQUENCY, 500UL * 1000UL); // 500 kpbs uint16_t errorCode1 = can1.begin(settings1, [] { can1.isr(); }); uint16_t errorCode2 = can2.begin(settings2, [] { can2.isr(); }); uint16_t errorCode3 = can3.begin(settings3, [] { can3.isr(); }); Third, It can run for a few minutes after that some MCP2515 does not respond to my ESP32. It can run for a few minutes after that some MCP2515 does not respond to my ESP32. I measure signal pin CS and INT that do not respond to CS signal always HIGHT and INT signal always LOW. Thank you. — Reply to this email directly, view it on GitHub <#34 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AEWKZVGCKPHGLXPRUXILRH3VCZQSVANCNFSM5RE633OA>. You are receiving this because you commented.