75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
/**
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* \file
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*
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* uart0 write routines
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*
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* \author
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*
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* Anthony "Asterisk" Ambuehl
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*
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "cc253x.h"
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#include "sfr-bits.h"
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#include "dev/uart0.h"
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#if UART0_ENABLE
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/*---------------------------------------------------------------------------*/
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void
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uart0_init()
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{
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#if UART0_CONF_HIGH_SPEED
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UART_SET_SPEED(0, UART_460_M, UART_460_E);
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#else
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UART_SET_SPEED(0, UART_115_M, UART_115_E);
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#endif
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#ifdef UART0_ALTERNATIVE_2
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PERCFG |= PERCFG_U0CFG; /* alternative port 2 = P1.5-2 */
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#ifdef UART0_RTSCTS
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P1SEL |= 0x3C; /* peripheral select for TX and RX, RTS, CTS */
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#else
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P1SEL |= 0x30; /* peripheral select for TX and RX */
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P1 &= ~0x08; /* RTS down */
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#endif
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P1DIR |= 0x28; /* RTS, TX out */
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P1DIR &= ~0x14; /* CTS & RX in */
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#else
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PERCFG &= ~PERCFG_U0CFG; /* alternative port 1 = P0.5-2 */
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#ifdef UART0_RTSCTS
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P0SEL |= 0x3C; /* peripheral select for RTS and CTS, TX, RX */
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#else
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P0SEL |= 0x0C; /* peripheral select for TX and RX */
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P0 &= ~0x20; /* RTS down */
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#endif
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P0DIR |= 0x28; /* RTS, TX out */
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P0DIR &= ~0x14; /* CTS, RX in */
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#endif
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#ifdef UART0_RTSCTS
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U0UCR = 0x42; /*defaults: 8N1, RTS/CTS, high stop bit*/
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#else
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U0UCR = 0x02; /*defaults: 8N1, no flow control, high stop bit*/
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#endif
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U0CSR = UCSR_MODE; /* UART mode */
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U0UCR |= 0x80; /* Flush */
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UART0_RX_EN();
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UART0_RX_INT(1);
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}
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/*---------------------------------------------------------------------------*/
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/* Write one byte over the UART. */
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void
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uart0_writeb(uint8_t byte)
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{
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UTX0IF = 0;
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U0DBUF = byte;
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while(!UTX0IF); /* Wait until byte has been transmitted. */
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UTX0IF = 0;
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}
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#endif
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