From 6944090b06db57fdc28faf13c3d6c85352cda05e Mon Sep 17 00:00:00 2001
From: Miles Frankland <mf@tvg.uk>
Date: Tue, 10 Dec 2019 08:58:16 +0000
Subject: [PATCH 1/2] Add begin command and oneshot command.  Fix SPI.begin
 issue

---
 mcp2515.cpp | 15 ++++++++++++---
 mcp2515.h   |  4 +++-
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/mcp2515.cpp b/mcp2515.cpp
index cc6e29e..bbe62b9 100644
--- a/mcp2515.cpp
+++ b/mcp2515.cpp
@@ -13,11 +13,9 @@ const struct MCP2515::RXBn_REGS MCP2515::RXB[N_RXBUFFERS] = {
 
 MCP2515::MCP2515(const uint8_t _CS)
 {
-    SPI.begin();
-
     SPICS = _CS;
     pinMode(SPICS, OUTPUT);
-    endSPI();
+    digitalWrite(SPICS, HIGH);
 }
 
 void MCP2515::startSPI() {
@@ -30,6 +28,12 @@ void MCP2515::endSPI() {
     SPI.endTransaction();
 }
 
+MCP2515::ERROR MCP2515::begin(void) {
+	SPI.begin();
+	reset();
+	return ERROR_OK; 
+}
+
 MCP2515::ERROR MCP2515::reset(void)
 {
     startSPI();
@@ -162,6 +166,11 @@ MCP2515::ERROR MCP2515::setNormalMode()
     return setMode(CANCTRL_REQOP_NORMAL);
 }
 
+MCP2515::ERROR MCP2515::setOneShotMode()
+{
+    return setMode(CANCTRL_REQOP_ONESHOT);
+}
+
 MCP2515::ERROR MCP2515::setMode(const CANCTRL_REQOP_MODE mode)
 {
     modifyRegister(MCP_CANCTRL, CANCTRL_REQOP, mode);
diff --git a/mcp2515.h b/mcp2515.h
index 7e38d18..aba4b5d 100644
--- a/mcp2515.h
+++ b/mcp2515.h
@@ -274,7 +274,7 @@ class MCP2515
             CANCTRL_REQOP_LOOPBACK   = 0x40,
             CANCTRL_REQOP_LISTENONLY = 0x60,
             CANCTRL_REQOP_CONFIG     = 0x80,
-            CANCTRL_REQOP_POWERUP    = 0xE0
+            CANCTRL_REQOP_ONESHOT    = 0x08
         };
 
         static const uint8_t CANSTAT_OPMOD = 0xE0;
@@ -458,11 +458,13 @@ class MCP2515
     public:
         MCP2515(const uint8_t _CS);
         ERROR reset(void);
+		ERROR begin(void);
         ERROR setConfigMode();
         ERROR setListenOnlyMode();
         ERROR setSleepMode();
         ERROR setLoopbackMode();
         ERROR setNormalMode();
+		ERROR setOneShotMode();
         ERROR setClkOut(const CAN_CLKOUT divisor);
         ERROR setBitrate(const CAN_SPEED canSpeed);
         ERROR setBitrate(const CAN_SPEED canSpeed, const CAN_CLOCK canClock);

From 057b322779c82aee465cb86607856170fc5c7940 Mon Sep 17 00:00:00 2001
From: Miles Frankland <mf@tvg.uk>
Date: Tue, 10 Dec 2019 09:04:16 +0000
Subject: [PATCH 2/2] Update readme and examples for new begin command

---
 README.md                                | 2 +-
 examples/CAN_SpeedTest/CAN_SpeedTest.ino | 3 +--
 examples/CAN_read/CAN_read.ino           | 3 +--
 examples/CAN_write/CAN_write.ino         | 3 +--
 4 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/README.md b/README.md
index c37cb27..70e8912 100644
--- a/README.md
+++ b/README.md
@@ -89,7 +89,7 @@ Example of initialization
 
 ```C++
 MCP2515 mcp2515(10);
-mcp2515.reset();
+mcp2515.begin();
 mcp2515.setBitrate(CAN_125KBPS);
 mcp2515.setLoopbackMode();
 ```
diff --git a/examples/CAN_SpeedTest/CAN_SpeedTest.ino b/examples/CAN_SpeedTest/CAN_SpeedTest.ino
index 140ac2b..fcc6074 100644
--- a/examples/CAN_SpeedTest/CAN_SpeedTest.ino
+++ b/examples/CAN_SpeedTest/CAN_SpeedTest.ino
@@ -9,9 +9,8 @@ unsigned long oldTime = 0;
  
 void setup() {
   Serial.begin(115200);
-  SPI.begin();
  
-  mcp2515.reset();
+  mcp2515.begin();
   mcp2515.setBitrate(CAN_125KBPS);
   mcp2515.setNormalMode();
  
diff --git a/examples/CAN_read/CAN_read.ino b/examples/CAN_read/CAN_read.ino
index b43e56a..21bdc39 100644
--- a/examples/CAN_read/CAN_read.ino
+++ b/examples/CAN_read/CAN_read.ino
@@ -7,9 +7,8 @@ MCP2515 mcp2515(10);
 
 void setup() {
   Serial.begin(115200);
-  SPI.begin();
   
-  mcp2515.reset();
+  mcp2515.begin();
   mcp2515.setBitrate(CAN_125KBPS);
   mcp2515.setNormalMode();
   
diff --git a/examples/CAN_write/CAN_write.ino b/examples/CAN_write/CAN_write.ino
index da1fdf9..bfdeb3a 100644
--- a/examples/CAN_write/CAN_write.ino
+++ b/examples/CAN_write/CAN_write.ino
@@ -32,9 +32,8 @@ void setup() {
   
   while (!Serial);
   Serial.begin(115200);
-  SPI.begin();
   
-  mcp2515.reset();
+  mcp2515.begin();
   mcp2515.setBitrate(CAN_125KBPS);
   mcp2515.setNormalMode();