nes-proj/cpu/cc2430/dev/uart0.c
2012-03-23 14:41:07 +00:00

70 lines
1.6 KiB
C

/**
* \file
*
* uart0 write routines
*
* \author
*
* Anthony "Asterisk" Ambuehl
*
*/
#include <stdlib.h>
#include <string.h>
#include "cc2430_sfr.h"
#include "dev/uart0.h"
#if UART_ZERO_ENABLE
/*---------------------------------------------------------------------------*/
void
uart0_init()
{
UART_SET_SPEED(0, UART_115_M, UART_115_E);
#ifdef UART0_ALTERNATIVE_2
PERCFG |= U0CFG; /*alternative port 2 = P1.5-2*/
#ifdef UART0_RTSCTS
P1SEL |= 0x3C; /*peripheral select for TX and RX, RTS, CTS*/
#else
P1SEL |= 0x30; /*peripheral select for TX and RX*/
P1 &= ~0x08; /*RTS down*/
#endif
P1DIR |= 0x28; /*RTS, TX out*/
P1DIR &= ~0x14; /*CTS & RX in*/
#else
PERCFG &= ~U0CFG; /*alternative port 1 = P0.5-2*/
#ifdef UART0_RTSCTS
P0SEL |= 0x3C; /*peripheral select for TX and RX, RTS, CTS*/
#else
P0SEL |= 0x0C; /*peripheral select for TX and RX*/
P0 &= ~0x20; /*RTS down*/
#endif
P0DIR |= 0x28; /*RTS & TX out*/
P0DIR &= ~0x14; /*CTS & RX in*/
#endif
#ifdef UART0_RTSCTS
U0UCR = 0x42; /*defaults: 8N1, RTS/CTS, high stop bit*/
#else
U0UCR = 0x02; /*defaults: 8N1, no flow control, high stop bit*/
#endif
U0CSR = U_MODE | U_RE | U_TXB; /*UART mode, receiver enable, TX done*/
/*set priority group of group 3 to highest, so the UART won't miss bytes*/
IP1 |= IP1_3;
IP0 |= IP0_3;
}
/*---------------------------------------------------------------------------*/
/* Write one byte over the UART. */
void
uart0_writeb(uint8_t byte)
{
IRCON2_UTX0IF = 0;
U0BUF = byte;
while(!IRCON2_UTX0IF); /* Wait until byte has been transmitted. */
IRCON2_UTX0IF = 0;
}
#endif