1 /* ----------------------------------------------------------------------------
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2 * ATMEL Microcontroller Software Support
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3 * ----------------------------------------------------------------------------
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4 * Copyright (c) 2009, Atmel Corporation
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6 * All rights reserved.
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8 * Redistribution and use in source and binary forms, with or without
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9 * modification, are permitted provided that the following conditions are met:
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11 * - Redistributions of source code must retain the above copyright notice,
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12 * this list of conditions and the disclaimer below.
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14 * Atmel's name may not be used to endorse or promote products derived from
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15 * this software without specific prior written permission.
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17 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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20 * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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23 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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24 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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25 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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26 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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27 * ----------------------------------------------------------------------------
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31 Title: Memories implementation
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34 //------------------------------------------------------------------------------
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36 //------------------------------------------------------------------------------
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40 //------------------------------------------------------------------------------
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41 // Exported functions
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42 //------------------------------------------------------------------------------
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43 //------------------------------------------------------------------------------
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44 /// Dummy function to initialize and configure the SDRAM
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45 //------------------------------------------------------------------------------
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46 void BOARD_ConfigureSdram(unsigned char busWidth)
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50 //------------------------------------------------------------------------------
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51 /// Configures the EBI for NandFlash access. Pins must be configured after or
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52 /// before calling this function.
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53 //------------------------------------------------------------------------------
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54 void BOARD_ConfigureNandFlash(unsigned char busWidth)
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56 AT91PS_HSMC4 pHSMC4 = AT91C_BASE_HSMC4;
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57 AT91PS_HSMC4_CS pSMC = AT91C_BASE_HSMC4_CS1;
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60 AT91C_BASE_PMC->PMC_PCER = (1<< AT91C_ID_HSMC4);
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62 #ifdef CHIP_NAND_CTRL
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63 // Enable the Nand Flash Controller
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64 pHSMC4 ->HSMC4_CTRL = AT91C_HSMC4_NFCEN;
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67 pSMC->HSMC4_SETUP = 0
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68 | ((0 << 0) & AT91C_HSMC4_NWE_SETUP)
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69 | ((1 << 8) & AT91C_HSMC4_NCS_WR_SETUP)
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70 | ((0 << 16) & AT91C_HSMC4_NRD_SETUP)
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71 | ((1 << 24) & AT91C_HSMC4_NCS_RD_SETUP);
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73 pSMC->HSMC4_PULSE = 0
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74 | ((2 << 0) & AT91C_HSMC4_NWE_PULSE)
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75 | ((3 << 8) & AT91C_HSMC4_NCS_WR_PULSE)
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76 | ((3 << 16) & AT91C_HSMC4_NRD_PULSE)
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77 | ((4 << 24) & AT91C_HSMC4_NCS_RD_PULSE);
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79 pSMC->HSMC4_CYCLE = 0
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80 | ((4 << 0) & AT91C_HSMC4_NWE_CYCLE)
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81 | ((7 << 16) & AT91C_HSMC4_NRD_CYCLE);
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83 pSMC->HSMC4_TIMINGS = 0
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84 | ((1 << 0) & AT91C_HSMC4_TCLR) // CLE to REN
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85 | ((2 << 4) & AT91C_HSMC4_TADL) // ALE to Data
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86 | ((1 << 8) & AT91C_HSMC4_TAR) // ALE to REN
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87 | ((1 << 16) & AT91C_HSMC4_TRR) // Ready to REN
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88 | ((2 << 24) & AT91C_HSMC4_TWB) // WEN to REN
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90 |(AT91C_HSMC4_NFSEL) // Nand Flash Timing
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94 if (busWidth == 8) {
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95 pSMC->HSMC4_MODE = AT91C_HSMC4_DBW_WIDTH_EIGTH_BITS | AT91C_HSMC4_READ_MODE | AT91C_HSMC4_WRITE_MODE;
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97 else if (busWidth == 16) {
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98 pSMC->HSMC4_MODE = AT91C_HSMC4_DBW_WIDTH_SIXTEEN_BITS | AT91C_HSMC4_READ_MODE | AT91C_HSMC4_WRITE_MODE;
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