/* * Copyright (c) 2010, Mariano Alvira and other contributors * to the MC1322x project (http://mc1322x.devl.org) * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the Institute nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * This file is part of libmc1322x: see http://mc1322x.devl.org * for details. * * */ #ifndef UART_H #define UART_H #include "contiki-conf.h" #include /* Timer registers are all 16-bit wide with 16-bit access only */ #define UART1_BASE (0x80005000) #define UART2_BASE (0x8000B000) struct UART_struct { union { uint32_t CON; struct UART_CON { uint32_t TXE:1; uint32_t RXE:1; uint32_t PEN:1; uint32_t EP:1; uint32_t ST2:1; uint32_t SB:1; uint32_t CONTX:1; uint32_t TXOENB:1; uint32_t :2; uint32_t XTIM:1; uint32_t FCP:1; uint32_t FCE:1; uint32_t MTXR:1; uint32_t MRXR:1; uint32_t TST:1; uint32_t :16; } CONbits; }; union { uint32_t STAT; struct UART_STAT { uint32_t SE:1; uint32_t PE:1; uint32_t FE:1; uint32_t TOE:1; uint32_t ROE:1; uint32_t RUE:1; uint32_t RXRDY:1; uint32_t TXRDY:1; uint32_t :24; } USTATbits; }; union { uint32_t DATA; struct UART_DATA { uint32_t DATA:8; uint32_t :24; } DATAbits; }; union { uint32_t RXCON; struct UART_URXCON { uint32_t LVL:6; uint32_t :26; } RXCONbits; }; union { uint32_t TXCON; struct UART_TXCON { uint32_t LVL:6; uint32_t :26; } TXCONbits; }; union { uint32_t CTS; struct UART_CTS { uint32_t LVL:5; uint32_t :27; } CTSbits; }; union { uint32_t BR; struct UART_BR { uint32_t MOD:16; uint32_t INC:16; } BRbits; }; }; static volatile struct UART_struct * const UART1 = (void *) (UART1_BASE); static volatile struct UART_struct * const UART2 = (void *) (UART2_BASE); /* Old uart definitions, for compatibility */ #ifndef REG_NO_COMPAT #define UCON (0) /* UCON bits */ #define UCON_SAMP 10 #define UCON_SAMP_8X 0 #define UCON_SAMP_16X 1 #define USTAT (0x04) #define UDATA (0x08) #define URXCON (0x0c) #define UTXCON (0x10) #define UCTS (0x14) #define UBRCNT (0x18) #define UART1_UCON ((volatile uint32_t *) ( UART1_BASE + UCON )) #define UART1_USTAT ((volatile uint32_t *) ( UART1_BASE + USTAT )) #define UART1_UDATA ((volatile uint32_t *) ( UART1_BASE + UDATA )) #define UART1_URXCON ((volatile uint32_t *) ( UART1_BASE + URXCON )) #define UART1_UTXCON ((volatile uint32_t *) ( UART1_BASE + UTXCON )) #define UART1_UCTS ((volatile uint32_t *) ( UART1_BASE + UCTS )) #define UART1_UBRCNT ((volatile uint32_t *) ( UART1_BASE + UBRCNT )) #define UART2_UCON ((volatile uint32_t *) ( UART2_BASE + UCON )) #define UART2_USTAT ((volatile uint32_t *) ( UART2_BASE + USTAT )) #define UART2_UDATA ((volatile uint32_t *) ( UART2_BASE + UDATA )) #define UART2_URXCON ((volatile uint32_t *) ( UART2_BASE + URXCON )) #define UART2_UTXCON ((volatile uint32_t *) ( UART2_BASE + UTXCON )) #define UART2_UCTS ((volatile uint32_t *) ( UART2_BASE + UCTS )) #define UART2_UBRCNT ((volatile uint32_t *) ( UART2_BASE + UBRCNT )) #endif /* REG_NO_COMPAT */ void uart_init(volatile struct UART_struct * uart, uint32_t baud); void uart_setbaud(volatile struct UART_struct * uart, uint32_t baud); void uart_flowctl(volatile struct UART_struct * uart, uint8_t on); /* The mc1322x has a 32 byte hardware FIFO for transmitted characters. * Currently it is always filled from a larger RAM buffer. It would be * possible to eliminate that overhead by filling directly from a chain * of data buffer pointers, but printf's would be not so easy. */ #ifndef UART1_CONF_TX_BUFFERSIZE #define UART1_TX_BUFFERSIZE 1024 #else #define UART1_TX_BUFFERSIZE UART1_CONF_TX_BUFFERSIZE #endif extern volatile uint32_t u1_tx_head, u1_tx_tail; void uart1_putc(char c); /* The mc1322x has a 32 byte hardware FIFO for received characters. * If a larger rx buffersize is specified the FIFO will be extended into RAM. * RAM transfers will occur on interrupt when the FIFO is nearly full. * If a smaller buffersize is specified hardware flow control will be * initiated at that FIFO level. * Set to 32 for no flow control or RAM buffer. */ #ifndef UART1_CONF_RX_BUFFERSIZE #define UART1_RX_BUFFERSIZE 128 #else #define UART1_RX_BUFFERSIZE UART1_CONF_RX_BUFFERSIZE #endif #if UART1_RX_BUFFERSIZE > 32 extern volatile uint32_t u1_rx_head, u1_rx_tail; #define uart1_can_get() ((u1_rx_head!=u1_rx_tail) || (*UART1_URXCON > 0)) #else #define uart1_can_get() (*UART1_URXCON > 0) #endif uint8_t uart1_getc(void); #ifndef UART2_CONF_TX_BUFFERSIZE #define UART2_TX_BUFFERSIZE 1024 #else #define UART2_TX_BUFFERSIZE UART1_CONF_TX_BUFFERSIZE #endif extern volatile uint32_t u2_tx_head, u2_tx_tail; void uart2_putc(char c); #ifndef UART2_CONF_RX_BUFFERSIZE #define UART2_RX_BUFFERSIZE 128 #else #define UART2_RX_BUFFERSIZE UART1_CONF_RX_BUFFERSIZE #endif #if UART2_RX_BUFFERSIZE > 32 extern volatile uint32_t u2_rx_head, u2_rx_tail; #define uart2_can_get() ((u2_rx_head!=u2_rx_tail) || (*UART2_URXCON > 0)) #else #define uart2_can_get() (*UART2_URXCON > 0) #endif uint8_t uart2_getc(void); #endif