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Eliminate UART_CONF_IBRD and UART_CONF_FBRD.

This commit is contained in:
Ian Martin 2014-03-22 10:26:03 -04:00
parent ee45fc7533
commit 336224633a
2 changed files with 0 additions and 18 deletions
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10
cpu/cc2538/dev/uart.c
View File

@ -168,17 +168,7 @@ uart_init(void)
REG(UART_BASE | UART_CTL) = UART_CTL_VALUE;
/* Baud Rate Generation */
#if (defined UART_CONF_BAUD_RATE)
uart_set_baudrate(UART_CONF_BAUD_RATE);
#elif (defined UART_CONF_IBRD && defined UART_CONF_FBRD)
REG(UART_BASE | UART_IBRD) = UART_CONF_IBRD;
REG(UART_BASE | UART_FBRD) = UART_CONF_FBRD;
#else
#error "UART baud rate misconfigured and custom IBRD/FBRD values not provided"
#error "Check the value of UART_CONF_BAUD_RATE in contiki-conf.h or project-conf.h"
#error "Alternatively, you can provide custom values for "
#error "UART_CONF_IBRD and UART_CONF_FBRD"
#endif
/* UART Control: 8N1 with FIFOs */
REG(UART_BASE | UART_LCRH) = UART_LCRH_WLEN_8 | UART_LCRH_FEN;

8
platform/cc2538dk/README.md
View File

@ -367,14 +367,6 @@ By default, the CC2538 UART is configured with a baud rate of 115200. It is easy
#define UART_CONF_BAUD_RATE 230400
Currently, this configuration directive only supports values 115200, 230400 and 460800. Custom baud rates can also be achieved by following the steps below:
* Configure `UART_CONF_BAUD_RATE` with an unsupported value to prevent it from auto-choosing values for IBRD and FBRD. For instance, in your project-conf.h you can do:
#define UART_CONF_BAUD_RATE 0
* Provide custom values for `UART_CONF_IBRD` and `UART_CONF_FBRD` according to the guidelines in the CC2538 User Guide.
RF and USB DMA
--------------
Transfers between RAM and the RF and USB will be conducted with DMA. If for whatever reason you wish to disable this, here are the relevant configuration lines.