pierremolinaro
commented
1 year ago Hello,
I think the STBY pin of the transceiver should be LOW for enabling it for receiving and transmitting frame. What is the reference of your transceiver ?
Pierre
Le 21 juin 2023 à 19:29, Nick Daria @.***> a écrit :
Sketch working in loopback mode just fine, however when I switch to NormalMode, it doesn't get any messages through, and it always starts having Message Send Failures after send # 17. Any thoughts?
Only major change was adding the STBY pin as mapped for the tranciever.
//—————————————————————————————————————————————————————————————————————————————— // ACAN2515 Demo in loopback mode, for ESP32 //——————————————————————————————————————————————————————————————————————————————
ifndef ARDUINO_ARCH_ESP32
error "Select an ESP32 board"
endif
//——————————————————————————————————————————————————————————————————————————————
include
//—————————————————————————————————————————————————————————————————————————————— // For using SPI on ESP32, see demo sketch SPI_Multiple_Buses // Two SPI busses are available in Arduino, HSPI and VSPI. // By default, Arduino SPI uses VSPI, leaving HSPI unused. // Default VSPI pins are: SCK=18, MISO=19, MOSI=23. // You can change the default pin with additional begin arguments // SPI.begin (MCP2515_SCK, MCP2515_MISO, MCP2515_MOSI) // CS input of MCP2515 should be connected to a digital output port // INT output of MCP2515 should be connected to a digital input port, with interrupt capability // Notes: // - GPIOs 34 to 39 are GPIs – input only pins. These pins don’t have internal pull-ups or // pull-down resistors. They can’t be used as outputs. // - some pins do not support INPUT_PULLUP (see https://www.esp32.com/viewtopic.php?t=439) // - All GPIOs can be configured as interrupts // See https://randomnerdtutorials.com/esp32-pinout-reference-gpios/ //——————————————————————————————————————————————————————————————————————————————
static const byte MCP2515_SCK = 8 ; // SCK input of MCP2515 static const byte MCP2515_MOSI = 10 ; // SDI input of MCP2515
static const byte MCP2515_MISO = 9 ; // SDO output of MCP2515static const byte MCP2515_CS = 2 ; // CS input of MCP2515 (adapt to your design) static const byte MCP2515_INT = 3 ; // INT output of MCP2515 (adapt to your design) static const byte MCP2515_RESET = 5 ; // RESET input of MCP2515 (adapt to your design) static const byte MCP2515_STBY = 4; // STBY input
//—————————————————————————————————————————————————————————————————————————————— // MCP2515 Driver object //——————————————————————————————————————————————————————————————————————————————
ACAN2515 can (MCP2515_CS, SPI, MCP2515_INT) ;
//—————————————————————————————————————————————————————————————————————————————— // MCP2515 Quartz: adapt to your design //——————————————————————————————————————————————————————————————————————————————
static const uint32_t QUARTZ_FREQUENCY = 20UL 1000UL 1000UL ; // 20 MHz
//—————————————————————————————————————————————————————————————————————————————— // SETUP //——————————————————————————————————————————————————————————————————————————————
void setup () { // STBY OFF pinMode(MCP2515_STBY, OUTPUT); digitalWrite(MCP2515_STBY, HIGH);
//--- RESET MCP2515 pinMode (MCP2515_RESET, OUTPUT) ; digitalWrite (MCP2515_RESET, LOW) ; delay (10) ; digitalWrite (MCP2515_RESET, HIGH) ; //--- Start serial Serial.begin (115200) ; //--- Wait for serial (blink led at 10 Hz during waiting) while (!Serial) { delay (50) ; } //--- Begin SPI SPI.begin (MCP2515_SCK, MCP2515_MISO, MCP2515_MOSI) ; //--- 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 printFrm(CANMessage frame) { Serial.print(frame.id, HEX); Serial.print(", "); for(uint8_t i = 0; i < 8; i++) { Serial.print(frame.data[i], HEX); Serial.print(" "); } }
void loop () { CANMessage frame; CANMessage frameRx; frame.id = 0x01; frame.len = 8; frame.ext = true; frame.data64 = 0xFF; if (gBlinkLedDate < millis ()) { gBlinkLedDate += 2000 ; const bool ok = can.tryToSend (frame) ; if (ok) { gSentFrameCount += 1 ; Serial.print ("Sent: ") ; Serial.println (gSentFrameCount) ; }else{ Serial.println ("Send failure") ; } } if (can.available ()) { can.receive (frameRx) ; printFrm(frameRx); gReceivedFrameCount ++ ; Serial.print ("Received: ") ; Serial.println (gReceivedFrameCount) ; } }
//——————————————————————————————————————————————————————————————————————————————
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nickdaria
Sketch working in loopback mode just fine, however when I switch to NormalMode, it doesn't get any messages through, and it always starts having Message Send Failures after send # 17. Any thoughts?
Only major change was adding the STBY pin as mapped for the tranciever.