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cc2538: Support any UART baudrate.

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This commit is contained in:
Ian Martin 2014-03-14 16:06:24 -04:00
parent 0a229a260d
commit e3c19714d4
2 changed files with 21 additions and 43 deletions
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13
cpu/cc2538/dev/uart.c
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@ -92,7 +92,7 @@ reset(void)
uint32_t lchr;
/* Make sure the UART is disabled before trying to configure it */
REG(UART_BASE | UART_CTL) = UART_CTL_TXE | UART_CTL_RXE;
REG(UART_BASE | UART_CTL) = UART_CTL_VALUE;
/* Clear error status */
REG(UART_BASE | UART_ECR) = 0xFF;
@ -165,11 +165,20 @@ uart_init(void)
UART_IFLS_RXIFLSEL_1_8 | UART_IFLS_TXIFLSEL_1_2;
/* Make sure the UART is disabled before trying to configure it */
REG(UART_BASE | UART_CTL) = UART_CTL_TXE | UART_CTL_RXE;
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;