UART Transmit
The following page provides an example of transmitting a string via UART.
Example
The first step is, as usual, configuring the PIN to the desired I/O type, in this case UART_OUT. First the type is reset (this has no effect if it is already of type NONE), then it is set as the desired type. Just to be slightly different from the other examples, we will use PIN4 as the UART I/O.
LUA
import("reset_io_type_cfg")
import("set_io_type_cfg")
reset_io_type_cfg(PIN4)
set_io_type_cfg(PIN4, UART_OUT)To confirm that PIN4 has been configured as UART_OUT, one can use the ‘list|io_type_cfg’ command when in Command Mode.
The next and final step of the example is to perform the string transmission.
LUA
import("uart_tx_char")
import("string", "sub")
str = "Hello World"
for i=1,#str do
uart_tx_char(PIN4, string.sub(str, i, i))
end