UART0 port of TWELITE (mwx::serial_jen)
Implement mwx::stream and input/output with UART0 of TWELITE.
The Serial object is initialized at system startup with UART0, 115200 bps, and the initialization process is performed in the library. On the user code, it is available from setup().
The Serial1 object is provided in the library, but no initialization process is performed; to enable UART1, perform the necessary initialization procedures Serial1.setup(), Serial1.begin().
Output may become unstable during setup(), wakeup() just after startup or flush process just before sleep.
Initialize objects.
Allocate memory for FIFO buffers for TX/RX
Allocating memory for TWE_tsFILE structure
Serial(UART0) will automatically call setup() in the library. There is no need for a user call.
Also, the buffer size of Serial (UART0) is determined at compile time. You can change it by the macro MWX_SER_TX_BUFF (768 if not specified) or MWX_SER_RX_BUFF (256 if not specified).
| Parameter | Description |
|---|---|
Initialize hardware.
The Serial (UART0) has an automatic begin() call in the library. No user call is required.
The last two digits of the specified baud rate are rounded to zero. Also, due to hardware limitations, there may be an error from the specified baud rate.
When specifying 9600, 38400, or 115200, the baud rate is calculated without division. See constexpr uint16_t _serial_get_hect_baud(uint32_t baud) for details of processing.
(Not implemented) Stop using hardware.
Get a structure in the TWE_tsFILE* format used in the C library.
In Serial (UART), the _sSerial structure is defined.
| Parameters | Description |
|---|---|
buf_tx
FIFO buffer size for TX
buf_rx
FIFO buffer size for RX
speed
Specifies the baud rate of the UART.
config
When the serial_jen::E_CONF::PORT_ALT bit is specified, UART1 is initialized with DIO14,15. If not specified, initializes UART1 with DIO11(TxD),9(RxD).