Sending messages cannot be updated

Thank you very much

发件人: HarveyBates5B @.> 发送时间: 2023年3月27日 7:43 收件人: autowp/arduino-mcp2515 @.> 抄送: hanlu1215 @.>; Author @.> 主题: Re: [autowp/arduino-mcp2515] Sending messages cannot be updated (Issue #88)

Ended up modifying the sendMessage() method to reset the TX CTRL registers if all the buffers are full. Don't know what the implications are so if someone who knows more about this could help that would be greatly appreciated.

This is my sendMessage() method now, be aware its recursive.

MCP2515::ERROR MCP2515::sendMessage(const struct can_frame *frame) {

if (frame->can_dlc > CAN_MAX_DLEN) {
    return ERROR_FAILTX;
}

TXBn txBuffers[N_TXBUFFERS] = {TXB0, TXB1, TXB2};

for (auto & txBuffer : txBuffers) {
    const struct TXBn_REGS *txbuf = &TXB[txBuffer];
    uint8_t ctrlval = readRegister(txbuf->CTRL);
    if ( (ctrlval & TXB_TXREQ) == 0 ) {
        return sendMessage(txBuffer, frame);
    }
}

uint8_t zeros[14]{};
setRegisters(MCP_TXB0CTRL, zeros, 14);
setRegisters(MCP_TXB1CTRL, zeros, 14);
setRegisters(MCP_TXB2CTRL, zeros, 14);

return sendMessage(frame);

}

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autowp / arduino-mcp2515

Sending messages cannot be updated #88