Libraries
Background
tollosUART.c – UART serial device functions
The UART functions provide character I/O over a serial link.| Functions | |
|---|---|
| uartGetc | get character from UART device |
| uartInit | initialize serial UART device |
| uartPutc | send character to UART device |
uartGetc – get character from UART device
int uartGetc(uint uart);
uart – ID number of UART to read
returns character read from UART, or −1 if none there or UART does not exist
This function does not block. It returns an int so that errors are distinct, and will also allow extension.
uartInit – initialize serial UART device
int uartInit(uint uart, uint baud);
uart – ID number of UART to initialize
baud – rate to run uart communications
returns 0 if OK, or −1 if uart does not exist
uartPutc – send character to UART device
int uartPutc(uint uart, int ch);
uart – ID number of UART to send character to
ch – character to send
returns 0 if OK, or −1 if uart does not exist
This waits for any previous send to complete. The character, ch, is an int to allow future extension.