Hardware Reference
In-Depth Information
23 main(int argc, char **argv) {
24
25 gpio_init(); /* Initialize GPIO access */
26 gpio_setalt(17, 3); /* GPIO 17 ALT = 3 */
27 gpio_setalt(30, 3); /* GPIO 3 0 ALT = 3 */
28 return 0;
29 }
30
31 /* End rtscts.c */
PL011 UART Features
The Broadcom
BCM2835 ARM Peripherals
manual states that the following features are
unsupported
:
•
No
Infrared Data Association (IrDA) support
•
No
Serial InfraRed (SIR) protocol encoder/decoder (endec)
•
No
direct memory access (DMA)
•
No
support for signals DCD, DSR, DTR, and RI
The following features
are
supported, however:
•
Separate 16×8 transmit and 16×12 receive FIFO buffers
•
Programmable baud rate generator
•
False start-bit detection
•
Line-break generation and detection
•
Support of control functions CTS and RTS
•
Programmable hardware flow control
•
Fully programmable serial interface characteristics:
•
Data can be 5, 6, 7, or 8 bits.
•
Even, odd, mark, space, or no-parity bit generation and
detection.
•
1 or 2 stop-bit generation.
•
Baud rate generation, DC up to UARTCLK/16.
