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
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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 ***@***.***> a écrit :
// ACAN2515 Demo in loopback mode, for ESP32
#ifndef ARDUINO_ARCH_ESP32
#error "Select an ESP32 board"
#endif
#include <ACAN2515.h>
#include <SPI.h>
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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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.. |
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// ACAN2515 Demo in loopback mode, for ESP32
#ifndef ARDUINO_ARCH_ESP32
#error "Select an ESP32 board"
#endif
#include <ACAN2515.h>
#include <SPI.h>
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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