能够在keil4下运行的AT91SAM9260示例程序（含工程文件）

/* ---------------------------------------------------------------------------- * ATMEL Microcontroller Software Support * ---------------------------------------------------------------------------- * Copyright (c) 2008, Atmel Corporation * * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * - Redistributions of source code must retain the above copyright notice, * this list of conditions and the disclaimer below. * * Atmel's name may not be used to endorse or promote products derived from * this software without specific prior written permission. * * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "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. * ---------------------------------------------------------------------------- */ /* Title: Memories implementation */ //------------------------------------------------------------------------------ // Headers //------------------------------------------------------------------------------ #include <board.h> #include <pio/pio.h> /* Macros: READ - Reads a register value. Useful to add trace information to read accesses. WRITE - Writes data in a register. Useful to add trace information to write accesses. */ #define READ(peripheral, register) (peripheral->register) #define WRITE(peripheral, register, value) (peripheral->register = value) //------------------------------------------------------------------------------ // Internal functions //------------------------------------------------------------------------------ //------------------------------------------------------------------------------ // Exported functions //------------------------------------------------------------------------------ //------------------------------------------------------------------------------ /// Changes the mapping of the chip so that the remap area mirrors the /// internal ROM or the EBI CS0. //------------------------------------------------------------------------------ void BOARD_RemapRom() { WRITE(AT91C_BASE_MATRIX, MATRIX_MRCR, 0); } //------------------------------------------------------------------------------ /// Changes the mapping of the chip so that the remap area mirrors the /// internal RAM. //------------------------------------------------------------------------------ void BOARD_RemapRam() { WRITE(AT91C_BASE_MATRIX, MATRIX_MRCR, (AT91C_MATRIX_RCA926I | AT91C_MATRIX_RCA926D)); } //------------------------------------------------------------------------------ /// Initialize and configure the SDRAM //------------------------------------------------------------------------------ void BOARD_ConfigureSdram(unsigned char busWidth) { volatile unsigned int i; static const Pin pinsSdram = PINS_SDRAM; volatile unsigned int *pSdram = (unsigned int *) AT91C_EBI_SDRAM; unsigned short sdrc_dbw = 0; switch (busWidth) { case 16: sdrc_dbw = AT91C_SDRAMC_DBW_16_BITS; break; case 32: default: sdrc_dbw = AT91C_SDRAMC_DBW_32_BITS; break; } // Enable corresponding PIOs PIO_Configure(&pinsSdram, 1); // Enable EBI chip select for the SDRAM, VDDIOMSEL set: memories are 3.3V powered WRITE(AT91C_BASE_MATRIX, MATRIX_EBI, AT91C_MATRIX_CS1A_SDRAMC | (1 << 16)); // CFG Control Register WRITE(AT91C_BASE_SDRAMC, SDRAMC_CR, AT91C_SDRAMC_NC_9 | AT91C_SDRAMC_NR_13 | AT91C_SDRAMC_CAS_2 | AT91C_SDRAMC_NB_4_BANKS | sdrc_dbw | AT91C_SDRAMC_TWR_2 | AT91C_SDRAMC_TRC_7 | AT91C_SDRAMC_TRP_2 | AT91C_SDRAMC_TRCD_2 | AT91C_SDRAMC_TRAS_5 | AT91C_SDRAMC_TXSR_8); for (i = 0; i < 1000; i++); WRITE(AT91C_BASE_SDRAMC, SDRAMC_MR, AT91C_SDRAMC_MODE_NOP_CMD); // Perform NOP pSdram[0] = 0x00000000; WRITE(AT91C_BASE_SDRAMC, SDRAMC_MR, AT91C_SDRAMC_MODE_PRCGALL_CMD); // Set PRCHG AL pSdram[0] = 0x00000000; // Perform PRCHG for (i = 0; i < 10000; i++); WRITE(AT91C_BASE_SDRAMC, SDRAMC_MR, AT91C_SDRAMC_MODE_RFSH_CMD); // Set 1st CBR pSdram[1] = 0x00000001; // Perform CBR WRITE(AT91C_BASE_SDRAMC, SDRAMC_MR, AT91C_SDRAMC_MODE_RFSH_CMD); // Set 2 CBR pSdram[2] = 0x00000002; // Perform CBR WRITE(AT91C_BASE_SDRAMC, SDRAMC_MR, AT91C_SDRAMC_MODE_RFSH_CMD); // Set 3 CBR pSdram[3] = 0x00000003; // Perform CBR WRITE(AT91C_BASE_SDRAMC, SDRAMC_MR, AT91C_SDRAMC_MODE_RFSH_CMD); // Set 4 CBR pSdram[4] = 0x00000004; // Perform CBR WRITE(AT91C_BASE_SDRAMC, SDRAMC_MR, AT91C_SDRAMC_MODE_RFSH_CMD); // Set 5 CBR pSdram[5] = 0x00000005; // Perform CBR WRITE(AT91C_BASE_SDRAMC, SDRAMC_MR, AT91C_SDRAMC_MODE_RFSH_CMD); // Set 6 CBR pSdram[6] = 0x00000006; // Perform CBR WRITE(AT91C_BASE_SDRAMC, SDRAMC_MR, AT91C_SDRAMC_MODE_RFSH_CMD); // Set 7 CBR pSdram[7] = 0x00000007; // Perform CBR WRITE(AT91C_BASE_SDRAMC, SDRAMC_MR, AT91C_SDRAMC_MODE_RFSH_CMD); // Set 8 CBR pSdram[8] = 0x00000008; // Perform CBR WRITE(AT91C_BASE_SDRAMC, SDRAMC_MR, AT91C_SDRAMC_MODE_LMR_CMD); // Set LMR operation pSdram[9] = 0xcafedede; // Perform LMR burst=1, lat=2 WRITE(AT91C_BASE_SDRAMC, SDRAMC_TR, (BOARD_MCK * 7) / 1000000); // Set Refresh Timer WRITE(AT91C_BASE_SDRAMC, SDRAMC_MR, AT91C_SDRAMC_MODE_NORMAL_CMD); // Set Normal mode pSdram[0] = 0x00000000; // Perform Normal mode } //------------------------------------------------------------------------------ /// Initialize and configure the SDRAM for a 48 MHz MCK (ROM code clock settings) //------------------------------------------------------------------------------ void BOARD_ConfigureSdram48MHz(unsigned char busWidth) { volatile unsigned int i; static const Pin pinsSdram = PINS_SDRAM; volatile unsigned int *pSdram = (unsigned int *) AT91C_EBI_SDRAM; unsigned short sdrc_dbw = 0; switch (busWidth) { case 16: sdrc_dbw = AT91C_SDRAMC_DBW_16_BITS; break; case 32: default: sdrc_dbw = AT91C_SDRAMC_DBW_32_BITS; break; } // Enable corresponding PIOs PIO_Configure(&pinsSdram, 1); // Enable EBI chip select for the SDRAM WRITE(AT91C_BASE_MATRIX, MATRIX_EBI, AT91C_MATRIX_CS1A_SDRAMC | (1 << 16)); // CFG Control Register W