at91sam7x256_usart.h

AT91SAM7X系ARM系统开发功能测试程序,如果你着手用AT91SAM来进行系统开发,这是确实是个很好的资料,有了他,会助你一臂之力.本源码是ADS1.2下的源码,用于RII功能测试

/* linux/include/asm-arm/arch-at91sam7x256/at91sam7x256_usart.h
 * 
 * Hardware definition for the usart peripheral in the ATMEL at91sam7x256 processor
 * 
 * Generated  11/02/2005 (15:17:30) AT91 SW Application Group from  V
 * 
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 * 
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
 * DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
 * 
 * You should have received a copy of the  GNU General Public License along
 * with this program; if not, write  to the Free Software Foundation, Inc.,
 * 675 Mass Ave, Cambridge, MA 02139, USA.
 */


#ifndef __AT91SAM7X256_USART_H
#define __AT91SAM7X256_USART_H

/* -------------------------------------------------------- */
/* USART ID definitions for  AT91SAM7X256           */
/* -------------------------------------------------------- */
#ifndef AT91C_ID_US0
#define AT91C_ID_US0   	 6 /**< USART 0 id */
#endif /* AT91C_ID_US0 */
#ifndef AT91C_ID_US1
#define AT91C_ID_US1   	 7 /**< USART 1 id */
#endif /* AT91C_ID_US1 */

/* -------------------------------------------------------- */
/* USART Base Address definitions for  AT91SAM7X256   */
/* -------------------------------------------------------- */
#define AT91C_BASE_US1       	0xFFFC4000 /**< US1 base address */
#define AT91C_BASE_US0       	0xFFFC0000 /**< US0 base address */

/* -------------------------------------------------------- */
/* PIO definition for USART hardware peripheral */
/* -------------------------------------------------------- */
#define AT91C_PA4_CTS0     	(1 << 4) /**< USART 0 Clear To Send */
#define AT91C_PA3_RTS0     	(1 << 3) /**< USART 0 Ready To Send */
#define AT91C_PA0_RXD0     	(1 << 0) /**< USART 0 Receive Data */
#define AT91C_PA2_SCK0     	(1 << 2) /**< USART 0 Serial Clock */
#define AT91C_PA1_TXD0     	(1 << 1) /**< USART 0 Transmit Data */

#define AT91C_PA9_CTS1     	(1 << 9) /**< USART 1 Clear To Send */
#define AT91C_PB23_DCD1     	(1 << 23) /**< USART 1 Data Carrier Detect */
#define AT91C_PB24_DSR1     	(1 << 24) /**< USART 1 Data Set ready */
#define AT91C_PB25_DTR1     	(1 << 25) /**< USART 1 Data Terminal ready */
#define AT91C_PB26_RI1      	(1 << 26) /**< USART 1 Ring Indicator */
#define AT91C_PA8_RTS1     	(1 << 8) /**< USART 1 Ready To Send */
#define AT91C_PA5_RXD1     	(1 << 5) /**< USART 1 Receive Data */
#define AT91C_PA7_SCK1     	(1 << 7) /**< USART 1 Serial Clock */
#define AT91C_PA6_TXD1     	(1 << 6) /**< USART 1 Transmit Data */


/* -------------------------------------------------------- */
/* Register offset definition for USART hardware peripheral */
/* -------------------------------------------------------- */
#define US_CR 	(0x0000) 	/**< Control Register */
#define US_MR 	(0x0004) 	/**< Mode Register */
#define US_IER 	(0x0008) 	/**< Interrupt Enable Register */
#define US_IDR 	(0x000C) 	/**< Interrupt Disable Register */
#define US_IMR 	(0x0010) 	/**< Interrupt Mask Register */
#define US_CSR 	(0x0014) 	/**< Channel Status Register */
#define US_RHR 	(0x0018) 	/**< Receiver Holding Register */
#define US_THR 	(0x001C) 	/**< Transmitter Holding Register */
#define US_BRGR 	(0x0020) 	/**< Baud Rate Generator Register */
#define US_RTOR 	(0x0024) 	/**< Receiver Time-out Register */
#define US_TTGR 	(0x0028) 	/**< Transmitter Time-guard Register */
#define US_FIDI 	(0x0040) 	/**< FI_DI_Ratio Register */
#define US_NER 	(0x0044) 	/**< Nb Errors Register */
#define US_IF 	(0x004C) 	/**< IRDA_FILTER Register */
#define US_RPR 	(0x0100) 	/**< Receive Pointer Register */
#define US_RCR 	(0x0104) 	/**< Receive Counter Register */
#define US_TPR 	(0x0108) 	/**< Transmit Pointer Register */
#define US_TCR 	(0x010C) 	/**< Transmit Counter Register */
#define US_RNPR 	(0x0110) 	/**< Receive Next Pointer Register */
#define US_RNCR 	(0x0114) 	/**< Receive Next Counter Register */
#define US_TNPR 	(0x0118) 	/**< Transmit Next Pointer Register */
#define US_TNCR 	(0x011C) 	/**< Transmit Next Counter Register */
#define US_PTCR 	(0x0120) 	/**< PDC Transfer Control Register */
#define US_PTSR 	(0x0124) 	/**< PDC Transfer Status Register */

/* -------------------------------------------------------- */
/* Bitfields definition for USART hardware peripheral */
/* -------------------------------------------------------- */
/* --- Register US_CR */
#define AT91C_US_RSTRX        (0x1 << 2 ) /**< (USART) Reset Receiver */
#define AT91C_US_RSTTX        (0x1 << 3 ) /**< (USART) Reset Transmitter */
#define AT91C_US_RXEN         (0x1 << 4 ) /**< (USART) Receiver Enable */
#define AT91C_US_RXDIS        (0x1 << 5 ) /**< (USART) Receiver Disable */
#define AT91C_US_TXEN         (0x1 << 6 ) /**< (USART) Transmitter Enable */
#define AT91C_US_TXDIS        (0x1 << 7 ) /**< (USART) Transmitter Disable */
#define AT91C_US_RSTSTA       (0x1 << 8 ) /**< (USART) Reset Status Bits */
#define AT91C_US_STTBRK       (0x1 << 9 ) /**< (USART) Start Break */
#define AT91C_US_STPBRK       (0x1 << 10) /**< (USART) Stop Break */
#define AT91C_US_STTTO        (0x1 << 11) /**< (USART) Start Time-out */
#define AT91C_US_SENDA        (0x1 << 12) /**< (USART) Send Address */
#define AT91C_US_RSTIT        (0x1 << 13) /**< (USART) Reset Iterations */
#define AT91C_US_RSTNACK      (0x1 << 14) /**< (USART) Reset Non Acknowledge */
#define AT91C_US_RETTO        (0x1 << 15) /**< (USART) Rearm Time-out */
#define AT91C_US_DTREN        (0x1 << 16) /**< (USART) Data Terminal ready Enable */
#define AT91C_US_DTRDIS       (0x1 << 17) /**< (USART) Data Terminal ready Disable */
#define AT91C_US_RTSEN        (0x1 << 18) /**< (USART) Request to Send enable */
#define AT91C_US_RTSDIS       (0x1 << 19) /**< (USART) Request to Send Disable */
/* --- Register US_MR */
#define AT91C_US_USMODE       (0xF << 0 ) /**< (USART) Usart mode */
#define 	AT91C_US_USMODE_NORMAL               0x0 /**< (USART) Normal */
#define 	AT91C_US_USMODE_RS485                0x1 /**< (USART) RS485 */
#define 	AT91C_US_USMODE_HWHSH                0x2 /**< (USART) Hardware Handshaking */
#define 	AT91C_US_USMODE_MODEM                0x3 /**< (USART) Modem */