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Added a TXBnCTRL bit checker before sending the next CAN frame #54

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Added a TXBnCTRL bit checker before sending the next CAN frame #54

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cf88833
Added a TXBnCTRL bit checker before sending the next CAN frame
joekeo Jan 27, 2022
4f05864
Fixed spell check typo
joekeo Jan 27, 2022
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15 changes: 15 additions & 0 deletions src/MCP2515/MCP2515_Control.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -68,11 +68,26 @@ void MCP2515_Control::transmit(TxB const txb, uint32_t const id, uint8_t const *
/* Load data buffer */
memcpy(tx_buffer.reg.data, data, std::min<uint8_t>(len, 8));

/* Wait until all the TX buffers are empty */
while(txbnctrl_peek()>0)
{
__asm__("nop\n\t");
}

/* Write to transmit buffer */
_io.loadTxBuffer(txb, tx_buffer.buf);

/* Request transmission */
_io.requestTx(txb);

}

uint8_t MCP2515_Control::txbnctrl_peek()
{
if(0x8&&_io.readRegister(Register::TXB0CTRL)) return 1;
if(0x8&&_io.readRegister(Register::TXB1CTRL)) return 2;
if(0x8&&_io.readRegister(Register::TXB2CTRL)) return 3;
return 0;
}

void MCP2515_Control::receive(RxB const rxb, uint32_t & id, uint8_t * data, uint8_t & len)
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1 change: 1 addition & 0 deletions src/MCP2515/MCP2515_Control.h
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,7 @@ class MCP2515_Control

void transmit (TxB const txb, uint32_t const id, uint8_t const * data, uint8_t const len);
void receive (RxB const rxb, uint32_t & id, uint8_t * data, uint8_t & len);
uint8_t txbnctrl_peek();

inline void reset () { _io.reset(); }
inline uint8_t status () { return _io.status(); }
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