pierremolinaro
commented
9 months ago Hi,
First thank you for making this library!
Thank you! Unfortunately, I'm not able to send more than one data frame.
The pin settings are ok, can you try in loop back mode ?
I receive always the first frame, and then nothing more. The sender (pi pico) then fails after the 17th iteration (full send buffer). So it seems, there is never a receive ack. I would be very happy for any ideas or hints as I have stared at my code for quite same time now.
Can you observe the CAN bus with a logic analyzer ? This can be usefull for finding what is going wrong.
Note you send frames with increasing identifier :
frame.id = gSentFrameCount + 1; //iterate id The priority of the frames are decreasing with identifier values. Is the other CAN tries also to send frames ? Pierre
Le 17 nov. 2023 à 22:16, omitron @.***> a écrit :
Hi!
First thank you for making this library!
Unfortunately, I'm not able to send more than one data frame. My setup: Sender: raspberry pi pico with an MCP 2015 (https://joy-it.net/en/products/SBC-CAN01, handles 2 voltages) Receiver: CANable 2.0 USB Stick / Arduino with CAN-BUS Shield V2.0 (https://wiki.seeedstudio.com/CAN-BUS_Shield_V2.0/) / Arduino MCP 2015
My sketch:
//—————————————————————————————————————————————————————————————————————————————— // ACAN2515 Demo in loopback mode, for the Raspberry Pi Pico // Thanks to Duncan Greenwood for providing this sample sketch //——————————————————————————————————————————————————————————————————————————————
ifndef ARDUINO_ARCH_RP2040
error "Select a Raspberry Pi Pico board"
endif
//——————————————————————————————————————————————————————————————————————————————
include
include
//—————————————————————————————————————————————————————————————————————————————— // The Pico has two SPI peripherals, SPI and SPI1. Either (or both) can be used. // The are no default pin assignments so they must be set explicitly. // Testing was done with Earle Philhower's arduino-pico core: // https://github.com/earlephilhower/arduino-pico //——————————————————————————————————————————————————————————————————————————————
static const byte MCP2515_SCK = 2 ; // SCK input of MCP2515 static const byte MCP2515_MOSI = 3 ; // SDI input of MCP2515 static const byte MCP2515_MISO = 4 ; // SDO output of MCP2515
static const byte MCP2515_CS = 5 ; // CS input of MCP2515 (adapt to your design) static const byte MCP2515_INT = 1 ; // INT output of MCP2515 (adapt to your design)
//—————————————————————————————————————————————————————————————————————————————— // MCP2515 Driver object //——————————————————————————————————————————————————————————————————————————————
ACAN2515 can (MCP2515_CS, SPI, MCP2515_INT) ;
//—————————————————————————————————————————————————————————————————————————————— // MCP2515 Quartz: adapt to your design //——————————————————————————————————————————————————————————————————————————————
static const uint32_t QUARTZ_FREQUENCY = 16UL 1000UL 1000UL ; // 16 MHz
//—————————————————————————————————————————————————————————————————————————————— // SETUP //——————————————————————————————————————————————————————————————————————————————
void setup () { //--- Switch on builtin led pinMode (LED_BUILTIN, OUTPUT) ; digitalWrite (LED_BUILTIN, HIGH) ; //--- Start serial Serial.begin (115200) ; //--- Wait for serial (blink led at 10 Hz during waiting) while (!Serial) { delay (50) ; digitalWrite (LED_BUILTIN, !digitalRead (LED_BUILTIN)) ; } //--- There are no default SPI pins so they must be explicitly assigned SPI.setSCK(MCP2515_SCK); SPI.setTX(MCP2515_MOSI); SPI.setRX(MCP2515_MISO); SPI.setCS(MCP2515_CS); //--- Begin SPI SPI.begin () ; //--- Configure ACAN2515 Serial.println ("Configure ACAN2515") ; ACAN2515Settings settings (QUARTZ_FREQUENCY, 500UL * 1000UL) ; // CAN bit rate 500 kb/s settings.mRequestedMode = ACAN2515Settings::NormalMode ; // Select loopback mode const uint16_t errorCode = can.begin (settings, [] { can.isr () ; }) ; if (errorCode == 0) { Serial.print ("Bit Rate prescaler: ") ; Serial.println (settings.mBitRatePrescaler) ; Serial.print ("Propagation Segment: ") ; Serial.println (settings.mPropagationSegment) ; Serial.print ("Phase segment 1: ") ; Serial.println (settings.mPhaseSegment1) ; Serial.print ("Phase segment 2: ") ; Serial.println (settings.mPhaseSegment2) ; Serial.print ("SJW: ") ; Serial.println (settings.mSJW) ; Serial.print ("Triple Sampling: ") ; Serial.println (settings.mTripleSampling ? "yes" : "no") ; Serial.print ("Actual bit rate: ") ; Serial.print (settings.actualBitRate ()) ; Serial.println (" bit/s") ; Serial.print ("Exact bit rate ? ") ; Serial.println (settings.exactBitRate () ? "yes" : "no") ; Serial.print ("Sample point: ") ; Serial.print (settings.samplePointFromBitStart ()) ; Serial.println ("%") ; } else { Serial.print ("Configuration error 0x") ; Serial.println (errorCode, HEX) ; } }
//----------------------------------------------------------------------------------------------------------------------
static uint32_t gBlinkLedDate = 0 ; static uint32_t gReceivedFrameCount = 0 ; static uint32_t gSentFrameCount = 0 ;
//——————————————————————————————————————————————————————————————————————————————
void loop () { CANMessage frame ; if (gBlinkLedDate < millis ()) { frame.len = 4; frame.data[0] = 42; frame.data[2] = 0; frame.data[3] = 42; frame.data[4] = 1;
frame.id = gSentFrameCount + 1; //iterate id
gBlinkLedDate += 2000 ; digitalWrite (LED_BUILTIN, !digitalRead (LED_BUILTIN)) ; const bool ok = can.tryToSend (frame) ; if (ok) {
gSentFrameCount += 1 ; Serial.print ("Sent: ") ; Serial.print (gSentFrameCount) ; Serial.print (" - ") ; Serial.println (frame.id) ;
} else { Serial.println ("Send failure") ; } }
}
//——————————————————————————————————————————————————————————————————————————————
I receive always the first frame, and then nothing more. The sender (pi pico) then fails after the 17th iteration (full send buffer). So it seems, there is never a receive ack. I would be very happy for any ideas or hints as I have stared at my code for quite same time now.
thank you!
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nsghub
omitron
Hi!
First thank you for making this library!
Unfortunately, I'm not able to send more than one data frame. My setup: Sender: raspberry pi pico with an MCP 2015 (https://joy-it.net/en/products/SBC-CAN01, handles 2 voltages) Receiver: CANable 2.0 USB Stick / Arduino with CAN-BUS Shield V2.0 (https://wiki.seeedstudio.com/CAN-BUS_Shield_V2.0/) / Arduino MCP 2015
My sketch:
//—————————————————————————————————————————————————————————————————————————————— // ACAN2515 Demo in loopback mode, for the Raspberry Pi Pico // Thanks to Duncan Greenwood for providing this sample sketch //——————————————————————————————————————————————————————————————————————————————
ifndef ARDUINO_ARCH_RP2040
error "Select a Raspberry Pi Pico board"
endif
//——————————————————————————————————————————————————————————————————————————————
include
include
//—————————————————————————————————————————————————————————————————————————————— // The Pico has two SPI peripherals, SPI and SPI1. Either (or both) can be used. // The are no default pin assignments so they must be set explicitly. // Testing was done with Earle Philhower's arduino-pico core: // https://github.com/earlephilhower/arduino-pico //——————————————————————————————————————————————————————————————————————————————
static const byte MCP2515_SCK = 2 ; // SCK input of MCP2515 static const byte MCP2515_MOSI = 3 ; // SDI input of MCP2515 static const byte MCP2515_MISO = 4 ; // SDO output of MCP2515
static const byte MCP2515_CS = 5 ; // CS input of MCP2515 (adapt to your design) static const byte MCP2515_INT = 1 ; // INT output of MCP2515 (adapt to your design)
//—————————————————————————————————————————————————————————————————————————————— // MCP2515 Driver object //——————————————————————————————————————————————————————————————————————————————
ACAN2515 can (MCP2515_CS, SPI, MCP2515_INT) ;
//—————————————————————————————————————————————————————————————————————————————— // MCP2515 Quartz: adapt to your design //——————————————————————————————————————————————————————————————————————————————
static const uint32_t QUARTZ_FREQUENCY = 16UL 1000UL 1000UL ; // 16 MHz
//—————————————————————————————————————————————————————————————————————————————— // SETUP //——————————————————————————————————————————————————————————————————————————————
void setup () { //--- Switch on builtin led pinMode (LED_BUILTIN, OUTPUT) ; digitalWrite (LED_BUILTIN, HIGH) ; //--- Start serial Serial.begin (115200) ; //--- Wait for serial (blink led at 10 Hz during waiting) while (!Serial) { delay (50) ; digitalWrite (LED_BUILTIN, !digitalRead (LED_BUILTIN)) ; } //--- There are no default SPI pins so they must be explicitly assigned SPI.setSCK(MCP2515_SCK); SPI.setTX(MCP2515_MOSI); SPI.setRX(MCP2515_MISO); SPI.setCS(MCP2515_CS); //--- Begin SPI SPI.begin () ; //--- Configure ACAN2515 Serial.println ("Configure ACAN2515") ; ACAN2515Settings settings (QUARTZ_FREQUENCY, 500UL * 1000UL) ; // CAN bit rate 500 kb/s settings.mRequestedMode = ACAN2515Settings::NormalMode ; // Select loopback mode const uint16_t errorCode = can.begin (settings, [] { can.isr () ; }) ; if (errorCode == 0) { Serial.print ("Bit Rate prescaler: ") ; Serial.println (settings.mBitRatePrescaler) ; Serial.print ("Propagation Segment: ") ; Serial.println (settings.mPropagationSegment) ; Serial.print ("Phase segment 1: ") ; Serial.println (settings.mPhaseSegment1) ; Serial.print ("Phase segment 2: ") ; Serial.println (settings.mPhaseSegment2) ; Serial.print ("SJW: ") ; Serial.println (settings.mSJW) ; Serial.print ("Triple Sampling: ") ; Serial.println (settings.mTripleSampling ? "yes" : "no") ; Serial.print ("Actual bit rate: ") ; Serial.print (settings.actualBitRate ()) ; Serial.println (" bit/s") ; Serial.print ("Exact bit rate ? ") ; Serial.println (settings.exactBitRate () ? "yes" : "no") ; Serial.print ("Sample point: ") ; Serial.print (settings.samplePointFromBitStart ()) ; Serial.println ("%") ; } else { Serial.print ("Configuration error 0x") ; Serial.println (errorCode, HEX) ; } }
//----------------------------------------------------------------------------------------------------------------------
static uint32_t gBlinkLedDate = 0 ; static uint32_t gReceivedFrameCount = 0 ; static uint32_t gSentFrameCount = 0 ;
//——————————————————————————————————————————————————————————————————————————————
void loop () { CANMessage frame ; if (gBlinkLedDate < millis ()) { frame.len = 4; frame.data[0] = 42; frame.data[2] = 0; frame.data[3] = 42; frame.data[4] = 1;
}
}
//——————————————————————————————————————————————————————————————————————————————
I receive always the first frame, and then nothing more. The sender (pi pico) then fails after the 17th iteration (full send buffer). So it seems, there is never a receive ack. I would be very happy for any ideas or hints as I have stared at my code for quite some time now.
thank you!