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Added and verified One Shot Mode works #124

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Added and verified One Shot Mode works #124

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a2cece4
Update mcp2515.h
arduinoenigma Jul 6, 2025
e1c517f
added One Shot Mode support
arduinoenigma Jul 6, 2025
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13 changes: 12 additions & 1 deletion mcp2515.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@ MCP2515::MCP2515(const uint8_t _CS, const uint32_t _SPI_CLOCK, SPIClass * _SPI)
SPI_CLOCK = _SPI_CLOCK;
pinMode(SPICS, OUTPUT);
digitalWrite(SPICS, HIGH);
OSMflag = false;
}

void MCP2515::startSPI() {
Expand Down Expand Up @@ -179,7 +180,7 @@ MCP2515::ERROR MCP2515::setNormalMode()

MCP2515::ERROR MCP2515::setMode(const CANCTRL_REQOP_MODE mode)
{
modifyRegister(MCP_CANCTRL, CANCTRL_REQOP, mode);
modifyRegister(MCP_CANCTRL, CANCTRL_REQOP | CANCTRL_OSM, OSMflag ? mode | CANCTRL_OSM : mode & ~(CANCTRL_OSM));

unsigned long endTime = millis() + 10;
bool modeMatch = false;
Expand Down Expand Up @@ -777,3 +778,13 @@ uint8_t MCP2515::errorCountTX(void)
{
return readRegister(MCP_TEC);
}

// these merely set the OSM flag
// setMode(...) or the other setXxxxMode() i.e: setNormalMode() must be called afterwards to set the correct mode with OSM
void MCP2515::enableOSM(void) {
OSMflag = true;
}

void MCP2515::disableOSM(void) {
OSMflag = false;
}
3 changes: 3 additions & 0 deletions mcp2515.h
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Expand Up @@ -449,6 +449,7 @@ class MCP2515
uint8_t SPICS;
uint32_t SPI_CLOCK;
SPIClass * SPIn;
bool OSMflag;

private:

Expand Down Expand Up @@ -496,6 +497,8 @@ class MCP2515
void clearERRIF();
uint8_t errorCountRX(void);
uint8_t errorCountTX(void);
void enableOSM(void);
void disableOSM(void);
};

#endif