hard20 pts · first answer countsmicrocontrollersdmauart

DMA buffer declared as a local

What is wrong with this function?

void send_status(void) {
    uint8_t msg[32];
    build_msg(msg);
    HAL_UART_Transmit_DMA(&huart2, msg, sizeof msg);
}

A.DMA controllers cannot read data from stack RAM at allB.sizeof msg gives the size of a pointer, not of the arrayC.msg is freed on return while the DMA is still reading itD.UART DMA transfers need a buffer of at least 64 bytes

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DMA buffer declared as a local

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