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pierremolinaro / acan2515

MCP2515 CAN Controller Driver for Arduino
MIT License
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can any one help to check the code.:only can read the sentCount and receiveCount. i dont know why the frame_rx.id is 18,and the data[] is 0 #18

Open giu-wxyao opened 4 years ago

giu-wxyao commented 4 years ago

// ACAN2515 Demo in loopback mode, for ESP32

ifndef ARDUINO_ARCH_ESP32

error "Select an ESP32 board"

endif

include

include

SPIClass hspi (HSPI) ;

static const byte MCP2515_SCK = 14 ; // SCK input of MCP2517 static const byte MCP2515_MOSI = 13 ; // SDI input of MCP2517
static const byte MCP2515_MISO = 12 ; // SDO output of MCP2517

static const byte MCP2515_CS = 15 ; // CS input of MCP2515 (adapt to your design) static const byte MCP2515_INT = 32 ; // INT output of MCP2515 (adapt to your design)

define LED_BUILTIN 33

// MCP2515 Driver object ACAN2515 can (MCP2515_CS, hspi, MCP2515_INT) ; // MCP2515 Quartz: adapt to your design static const uint32_t QUARTZ_FREQUENCY = 8UL 1000UL 1000UL ; // 20 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)) ; } //--- Begin SPI hspi.begin () ;//MCP2515_SCK, MCP2515_MISO,MCP2515_MOSI //--- Configure ACAN2515 Serial.println ("Configure ACAN2515") ; ACAN2515Settings settings (QUARTZ_FREQUENCY, 500UL * 1000UL) ; // CAN bit rate 125 kb/s settings.mRequestedMode = ACAN2515Settings::LoopBackMode ; // 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 () { // can.poll (); CANMessage frame_rx; CANMessage frame_tx; frame_tx.len = 8; frame_tx.ext = false; frame_tx.rtr = false; frame_tx.idx = 0; frame_tx.id = 0x12;

if (gBlinkLedDate < millis ()) { gBlinkLedDate += 1000 ; digitalWrite (LED_BUILTIN, !digitalRead (LED_BUILTIN)) ; const bool ok = can.tryToSend (frame_tx) ; if (ok) { gSentFrameCount += 1 ; Serial.print ("Sent: ") ; Serial.println (gSentFrameCount) ; }else{ Serial.println ("Send failure") ; } } if (can.available ()) { can.receive (frame_rx) ; gReceivedFrameCount ++ ; Serial.print ("Received: ") ; Serial.println (gReceivedFrameCount) ; Serial.println(frame_rx.id); Serial.println (frame_rx.data[0]) ; Serial.println (frame_rx.data[1]) ; Serial.println (frame_rx.data[2]) ; Serial.println (frame_rx.data[3]) ; Serial.println (frame_rx.data[4]) ; Serial.println (frame_rx.data[5]) ; Serial.println (frame_rx.data[6]) ; Serial.println (frame_rx.data[7]) ; } }

print result as below: only can read the sentCount and receiveCount. i dont know why the frame_rx.id is 18,and the data[] is 0

10:08:17.947 -> Sent: 443 10:08:17.947 -> Received: 443 10:08:17.947 -> 18 10:08:17.947 -> 0 10:08:17.947 -> 0 10:08:17.947 -> 0 10:08:17.947 -> 0 10:08:17.947 -> 0 10:08:17.947 -> 0 10:08:17.947 -> 0 10:08:17.947 -> 0

pierremolinaro commented 4 years ago

i dont know why the frame_rx.id is 18, …

You set frame.tx with: frame_tx.id = 0x12;

0x12 is 18 in decimal.

…,and the data[] is 0

You never set frame_tx.data[0], frame_tx.data[1], …, frame_tx.data[7] so we have their default value.

Le 24 mai 2020 à 04:15, giu-wxyao notifications@github.com a écrit :

// ACAN2515 Demo in loopback mode, for ESP32

ifndef ARDUINO_ARCH_ESP32

error "Select an ESP32 board"

endif

include

include

SPIClass hspi (HSPI) ;

static const byte MCP2515_SCK = 14 ; // SCK input of MCP2517 static const byte MCP2515_MOSI = 13 ; // SDI input of MCP2517 static const byte MCP2515_MISO = 12 ; // SDO output of MCP2517

static const byte MCP2515_CS = 15 ; // CS input of MCP2515 (adapt to your design) static const byte MCP2515_INT = 32 ; // INT output of MCP2515 (adapt to your design)

define LED_BUILTIN 33

// MCP2515 Driver object ACAN2515 can (MCP2515_CS, hspi, MCP2515_INT) ; // MCP2515 Quartz: adapt to your design static const uint32_t QUARTZ_FREQUENCY = 8UL 1000UL 1000UL ; // 20 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)) ; } //--- Begin SPI hspi.begin () ;//MCP2515_SCK, MCP2515_MISO,MCP2515_MOSI //--- Configure ACAN2515 Serial.println ("Configure ACAN2515") ; ACAN2515Settings settings (QUARTZ_FREQUENCY, 500UL * 1000UL) ; // CAN bit rate 125 kb/s settings.mRequestedMode = ACAN2515Settings::LoopBackMode ; // 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 () { // can.poll (); CANMessage frame_rx; CANMessage frame_tx; frame_tx.len = 8; frame_tx.ext = false; frame_tx.rtr = false; frame_tx.idx = 0; frame_tx.id = 0x12;

if (gBlinkLedDate < millis ()) { gBlinkLedDate += 1000 ; digitalWrite (LED_BUILTIN, !digitalRead (LED_BUILTIN)) ; const bool ok = can.tryToSend (frame_tx) ; if (ok) { gSentFrameCount += 1 ; Serial.print ("Sent: ") ; Serial.println (gSentFrameCount) ; }else{ Serial.println ("Send failure") ; } } if (can.available ()) { can.receive (frame_rx) ; gReceivedFrameCount ++ ; Serial.print ("Received: ") ; Serial.println (gReceivedFrameCount) ; Serial.println(frame_rx.id); Serial.println (frame_rx.data[0]) ; Serial.println (frame_rx.data[1]) ; Serial.println (frame_rx.data[2]) ; Serial.println (frame_rx.data[3]) ; Serial.println (frame_rx.data[4]) ; Serial.println (frame_rx.data[5]) ; Serial.println (frame_rx.data[6]) ; Serial.println (frame_rx.data[7]) ; } }

print result as below: only can read the sentCount and receiveCount. i dont know why the frame_rx.id is 18,and the data[] is 0

10:08:17.947 -> Sent: 443 10:08:17.947 -> Received: 443 10:08:17.947 -> 18 10:08:17.947 -> 0 10:08:17.947 -> 0 10:08:17.947 -> 0 10:08:17.947 -> 0 10:08:17.947 -> 0 10:08:17.947 -> 0 10:08:17.947 -> 0 10:08:17.947 -> 0

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giu-wxyao commented 4 years ago

thanks your reply，but i have another doubt. when i use a pcan_view software to send data[] to mcp2515. i can not receive the data[]. i use mcp2515 send data[] to pcan_view,also can not receiver the data. wish your help.. thanks.