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examples/LoopBackDemoESP32NoInt/LoopBackDemoESP32NoInt.ino
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| //—————————————————————————————————————————————————————————————————————————————— | ||
| // ACAN2517FD Demo in loopback mode, for ESP32, no interrupt pin | ||
| //—————————————————————————————————————————————————————————————————————————————— | ||
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| #ifndef ARDUINO_ARCH_ESP32 | ||
| #error "Select an ESP32 board" | ||
| #endif | ||
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| //—————————————————————————————————————————————————————————————————————————————— | ||
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| #include <ACAN2517FD.h> | ||
| #include <SPI.h> | ||
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| //—————————————————————————————————————————————————————————————————————————————— | ||
| // 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 use 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 (MCP2517_SCK, MCP2517_MISO, MCP2517_MOSI) | ||
| // CS input of MCP2517 should be connected to a digital output port | ||
| // 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) | ||
| // See https://randomnerdtutorials.com/esp32-pinout-reference-gpios/ | ||
| //—————————————————————————————————————————————————————————————————————————————— | ||
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| static const byte MCP2517_SCK = 26 ; // SCK input of MCP2517 | ||
| static const byte MCP2517_MOSI = 19 ; // SDI input of MCP2517 | ||
| static const byte MCP2517_MISO = 18 ; // SDO output of MCP2517 | ||
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| static const byte MCP2517_CS = 16 ; // CS input of MCP2517 | ||
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| //—————————————————————————————————————————————————————————————————————————————— | ||
| // ACAN2517FD Driver object | ||
| //—————————————————————————————————————————————————————————————————————————————— | ||
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| ACAN2517FD can (MCP2517_CS, SPI, 255) ; // Last argument is 255 -> no interrupt pin | ||
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| //—————————————————————————————————————————————————————————————————————————————— | ||
| // SETUP | ||
| //—————————————————————————————————————————————————————————————————————————————— | ||
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| 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 | ||
| SPI.begin (MCP2517_SCK, MCP2517_MISO, MCP2517_MOSI) ; | ||
| //--- Configure ACAN2517FD | ||
| Serial.print ("sizeof (ACAN2517FDSettings): ") ; | ||
| Serial.print (sizeof (ACAN2517FDSettings)) ; | ||
| Serial.println (" bytes") ; | ||
| Serial.println ("Configure ACAN2517FD") ; | ||
| ACAN2517FDSettings settings (ACAN2517FDSettings::OSC_4MHz10xPLL, 125 * 1000, ACAN2517FDSettings::DATA_BITRATE_x1) ; | ||
| settings.mRequestedMode = ACAN2517FDSettings::InternalLoopBack ; // Select loopback mode | ||
| //--- RAM Usage | ||
| Serial.print ("MCP2517FD RAM Usage: ") ; | ||
| Serial.print (settings.ramUsage ()) ; | ||
| Serial.println (" bytes") ; | ||
| //--- Begin | ||
| const uint32_t errorCode = can.begin (settings, NULL) ; // Second argument is NULL -> no interrupt service routine | ||
| if (errorCode == 0) { | ||
| Serial.print ("Bit Rate prescaler: ") ; | ||
| Serial.println (settings.mBitRatePrescaler) ; | ||
| Serial.print ("Arbitration Phase segment 1: ") ; | ||
| Serial.println (settings.mArbitrationPhaseSegment1) ; | ||
| Serial.print ("Arbitration Phase segment 2: ") ; | ||
| Serial.println (settings.mArbitrationPhaseSegment2) ; | ||
| Serial.print ("Arbitration SJW:") ; | ||
| Serial.println (settings.mArbitrationSJW) ; | ||
| Serial.print ("Actual Arbitration Bit Rate: ") ; | ||
| Serial.print (settings.actualArbitrationBitRate ()) ; | ||
| Serial.println (" bit/s") ; | ||
| Serial.print ("Exact Arbitration Bit Rate ? ") ; | ||
| Serial.println (settings.exactArbitrationBitRate () ? "yes" : "no") ; | ||
| Serial.print ("Arbitration Sample point: ") ; | ||
| Serial.print (settings.arbitrationSamplePointFromBitStart ()) ; | ||
| Serial.println ("%") ; | ||
| }else{ | ||
| Serial.print ("Configuration error 0x") ; | ||
| Serial.println (errorCode, HEX) ; | ||
| } | ||
| } | ||
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| //—————————————————————————————————————————————————————————————————————————————— | ||
| // LOOP | ||
| //—————————————————————————————————————————————————————————————————————————————— | ||
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| static unsigned gBlinkLedDate = 0 ; | ||
| static unsigned gReceivedFrameCount = 0 ; | ||
| static unsigned gSentFrameCount = 0 ; | ||
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| //—————————————————————————————————————————————————————————————————————————————— | ||
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| void loop () { | ||
| can.poll () ; // Call can.poll as often as possible | ||
| CANFDMessage frame ; | ||
| if (gBlinkLedDate < millis ()) { | ||
| gBlinkLedDate += 2000 ; | ||
| digitalWrite (LED_BUILTIN, !digitalRead (LED_BUILTIN)) ; | ||
| 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 (frame) ; | ||
| gReceivedFrameCount ++ ; | ||
| Serial.print ("Received: ") ; | ||
| Serial.println (gReceivedFrameCount) ; | ||
| } | ||
| } | ||
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| //—————————————————————————————————————————————————————————————————————————————— |
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examples/LoopBackDemoTeensy3xNoInt/LoopBackDemoTeensy3xNoInt.ino
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,140 @@ | ||
| //—————————————————————————————————————————————————————————————————————————————— | ||
| // ACAN2517FD Demo in loopback mode, using hardware SPI1, with no external interrupt | ||
| //—————————————————————————————————————————————————————————————————————————————— | ||
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| #include <ACAN2517FD.h> | ||
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| //—————————————————————————————————————————————————————————————————————————————— | ||
| // MCP2517 connections: adapt theses settings to your design | ||
| // As hardware SPI is used, you should select pins that support SPI functions. | ||
| // This sketch is designed for a Teensy 3.5, using SPI1 | ||
| // But standard Teensy 3.5 SPI1 pins are not used | ||
| // SCK input of MCP2517 is connected to pin #32 | ||
| // SDI input of MCP2517 is connected to pin #0 | ||
| // SDO output of MCP2517 is connected to pin #1 | ||
| // CS input of MCP2517 should be connected to a digital output port | ||
| //—————————————————————————————————————————————————————————————————————————————— | ||
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| static const byte MCP2517_SCK = 32 ; // SCK input of MCP2517 | ||
| static const byte MCP2517_SDI = 0 ; // SDI input of MCP2517 | ||
| static const byte MCP2517_SDO = 1 ; // SDO output of MCP2517 | ||
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| static const byte MCP2517_CS = 31 ; // CS input of MCP2517 | ||
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| //—————————————————————————————————————————————————————————————————————————————— | ||
| // ACAN2517FD Driver object | ||
| //—————————————————————————————————————————————————————————————————————————————— | ||
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| ACAN2517FD can (MCP2517_CS, SPI1, 255) ; // Last argument is 255 -> no interrupt pin | ||
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| //—————————————————————————————————————————————————————————————————————————————— | ||
| // SETUP | ||
| //—————————————————————————————————————————————————————————————————————————————— | ||
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| void setup () { | ||
| //--- Switch on builtin led | ||
| pinMode (LED_BUILTIN, OUTPUT) ; | ||
| digitalWrite (LED_BUILTIN, HIGH) ; | ||
| //--- Start serial | ||
| Serial.begin (38400) ; | ||
| //--- Wait for serial (blink led at 10 Hz during waiting) | ||
| while (!Serial) { | ||
| delay (50) ; | ||
| digitalWrite (LED_BUILTIN, !digitalRead (LED_BUILTIN)) ; | ||
| } | ||
| //--- Define alternate pins for SPI1 (see https://www.pjrc.com/teensy/td_libs_SPI.html) | ||
| Serial.print ("Using pin #") ; | ||
| Serial.print (MCP2517_SDI) ; | ||
| Serial.print (" for MOSI: ") ; | ||
| Serial.println (SPI1.pinIsMOSI (MCP2517_SDI) ? "yes" : "NO!!!") ; | ||
| Serial.print ("Using pin #") ; | ||
| Serial.print (MCP2517_SDO) ; | ||
| Serial.print (" for MISO: ") ; | ||
| Serial.println (SPI1.pinIsMISO (MCP2517_SDO) ? "yes" : "NO!!!") ; | ||
| Serial.print ("Using pin #") ; | ||
| Serial.print (MCP2517_SCK) ; | ||
| Serial.print (" for SCK: ") ; | ||
| Serial.println (SPI1.pinIsSCK (MCP2517_SCK) ? "yes" : "NO!!!") ; | ||
| SPI1.setMOSI (MCP2517_SDI) ; | ||
| SPI1.setMISO (MCP2517_SDO) ; | ||
| SPI1.setSCK (MCP2517_SCK) ; | ||
| //----------------------------------- Begin SPI1 | ||
| SPI1.begin () ; | ||
| //--- Configure ACAN2517FD | ||
| Serial.println ("Configure ACAN2517FD") ; | ||
| ACAN2517FDSettings settings (ACAN2517FDSettings::OSC_4MHz10xPLL, 125 * 1000, ACAN2517FDSettings::DATA_BITRATE_x1) ; | ||
| settings.mRequestedMode = ACAN2517FDSettings::InternalLoopBack ; // Select loopback mode | ||
| //--- RAM Usage | ||
| Serial.print ("MCP2517FD RAM Usage: ") ; | ||
| Serial.print (settings.ramUsage ()) ; | ||
| Serial.println (" bytes") ; | ||
| //--- Begin | ||
| const uint32_t errorCode = can.begin (settings, NULL) ; // Second argument is NULL -> no interrupt service routine | ||
| if (errorCode == 0) { | ||
| Serial.print ("Bit Rate prescaler: ") ; | ||
| Serial.println (settings.mBitRatePrescaler) ; | ||
| Serial.print ("Arbitration Phase segment 1: ") ; | ||
| Serial.println (settings.mArbitrationPhaseSegment1) ; | ||
| Serial.print ("Arbitration Phase segment 2: ") ; | ||
| Serial.println (settings.mArbitrationPhaseSegment2) ; | ||
| Serial.print ("Arbitration SJW:") ; | ||
| Serial.println (settings.mArbitrationSJW) ; | ||
| Serial.print ("Actual Arbitration Bit Rate: ") ; | ||
| Serial.print (settings.actualArbitrationBitRate ()) ; | ||
| Serial.println (" bit/s") ; | ||
| Serial.print ("Exact Arbitration Bit Rate ? ") ; | ||
| Serial.println (settings.exactArbitrationBitRate () ? "yes" : "no") ; | ||
| Serial.print ("Arbitration Sample point: ") ; | ||
| Serial.print (settings.arbitrationSamplePointFromBitStart ()) ; | ||
| Serial.println ("%") ; | ||
| }else{ | ||
| Serial.print ("Configuration error 0x") ; | ||
| Serial.println (errorCode, HEX) ; | ||
| } | ||
| } | ||
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| //—————————————————————————————————————————————————————————————————————————————————————————————————————————————————————— | ||
|
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| static unsigned gBlinkLedDate = 0 ; | ||
| static unsigned gReceivedFrameCount = 0 ; | ||
| static unsigned gSentFrameCount = 0 ; | ||
|
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| //—————————————————————————————————————————————————————————————————————————————— | ||
|
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| void loop() { | ||
| can.poll () ; // Call can.poll as often as possible | ||
| CANFDMessage frame ; | ||
| if (gBlinkLedDate < millis ()) { | ||
| gBlinkLedDate += 2000 ; | ||
| digitalWrite (LED_BUILTIN, !digitalRead (LED_BUILTIN)) ; | ||
| frame.len = 64 ; | ||
| for (uint8_t i=0 ; i<frame.len ; i++) { | ||
| frame.data [i] = i ; | ||
| } | ||
| 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 (frame) ; | ||
| bool ok = frame.len == 64 ; | ||
| if (!ok) { | ||
| Serial.println ("length error") ; | ||
| } | ||
| for (uint8_t i=0 ; (i<frame.len) && ok ; i++) { | ||
| ok = frame.data [i] == i ; | ||
| } | ||
| gReceivedFrameCount ++ ; | ||
| Serial.print ("Received: ") ; | ||
| Serial.print (gReceivedFrameCount) ; | ||
| Serial.print (", ") ; | ||
| Serial.println (ok ? "ok" : "error") ; | ||
| } | ||
| } | ||
|
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| //—————————————————————————————————————————————————————————————————————————————— |
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