refactored One Shot Mode functionality

can.h

@@ -37,9 +37,9 @@ typedef __u32 canid_t;
 #define CAN_MAX_DLEN 8
 
 struct can_frame {
-    canid_t can_id;  /* 32 bit CAN_ID + EFF/RTR/ERR flags */
-    __u8    can_dlc; /* frame payload length in byte (0 .. CAN_MAX_DLEN) */
-    __u8    data[CAN_MAX_DLEN] __attribute__((aligned(8)));
+               canid_t can_id;  /* 32 bit CAN_ID + EFF/RTR/ERR flags */
+               __u8    can_dlc; /* frame payload length in byte (0 .. CAN_MAX_DLEN) */
+    alignas(8) __u8    data[CAN_MAX_DLEN];
 };
 
 #endif /* CAN_H_ */

mcp2515.cpp

@@ -177,9 +177,14 @@ MCP2515::ERROR MCP2515::setNormalMode()
     return setMode(CANCTRL_REQOP_NORMAL);
 }
 
+MCP2515::ERROR MCP2515::setNormalOneShotMode()
+{
+    return setMode(CANCTRL_REQOP_NORMAL | CANCTRL_OSM);
+}
+
 MCP2515::ERROR MCP2515::setMode(const CANCTRL_REQOP_MODE mode)
 {
-    modifyRegister(MCP_CANCTRL, CANCTRL_REQOP, mode);
+    modifyRegister(MCP_CANCTRL, CANCTRL_REQOP | CANCTRL_OSM, mode);
 
     unsigned long endTime = millis() + 10;
     bool modeMatch = false;

mcp2515.h

@@ -473,6 +473,7 @@ class MCP2515
         ERROR setSleepMode();
         ERROR setLoopbackMode();
         ERROR setNormalMode();
+		ERROR setNormalOneShotMode();
         ERROR setClkOut(const CAN_CLKOUT divisor);
         ERROR setBitrate(const CAN_SPEED canSpeed);
         ERROR setBitrate(const CAN_SPEED canSpeed, const CAN_CLOCK canClock);