1 /* ----------------------------------------------------------------------------
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2 * SAM Software Package License
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3 * ----------------------------------------------------------------------------
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4 * Copyright (c) 2011, 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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30 /** \addtogroup dmad_module
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32 * \section DmaHw Dma Hardware Interface Usage
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34 * <li> The DMA controller can handle the transfer between peripherals and memory
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35 * and so receives the triggers from the peripherals. The hardware interface number
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36 * are getting from DMAIF_Get_ChannelNumber().</li>
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38 * <li> DMAIF_IsValidatedPeripherOnDma() helps to check if the given DMAC has associated
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39 * peripheral identifier coded by the given peripheral.</li>
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47 /*----------------------------------------------------------------------------
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49 *----------------------------------------------------------------------------*/
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52 /*----------------------------------------------------------------------------
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54 *----------------------------------------------------------------------------*/
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55 /** Array of DMA Channel definition for SAMA5 chip*/
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56 static const DmaHardwareInterface dmaHwIf[] = {
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57 /* dmac, peripheral, T/R, Channel Number*/
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58 {0, ID_HSMCI0, 0, 0},
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59 {0, ID_HSMCI0, 1, 0},
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62 {0, ID_USART0, 0, 3},
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63 {0, ID_USART0, 1, 4},
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64 {0, ID_USART1, 0, 5},
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65 {0, ID_USART1, 1, 6},
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69 {0, ID_TWI1, 1, 10},
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70 {0, ID_UART0, 0, 11},
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71 {0, ID_UART0, 1, 12},
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72 {0, ID_SSC0, 0, 13},
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73 {0, ID_SSC0, 1, 14},
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75 {1, ID_HSMCI1, 0, 0},
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76 {1, ID_HSMCI1, 1, 0},
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77 {1, ID_HSMCI2, 0, 1},
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78 {1, ID_HSMCI2, 1, 1},
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82 {1, ID_UART1, 0, 5},
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83 {1, ID_UART1, 1, 6},
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84 {1, ID_USART2, 0, 7},
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85 {1, ID_USART2, 1, 8},
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86 {1, ID_USART3, 0, 9},
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87 {1, ID_USART3, 1, 10},
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88 {1, ID_TWI2, 0, 11},
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89 {1, ID_TWI2, 1, 12},
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90 {1, ID_DBGU, 0, 13},
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91 {1, ID_DBGU, 1, 14},
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92 {1, ID_SPI1, 0, 15},
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93 {1, ID_SPI1, 1, 16},
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97 {1, ID_TDES, 0, 20},
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101 /*----------------------------------------------------------------------------
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103 *----------------------------------------------------------------------------*/
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104 /** Number of recognized peripheral identifier code for DMA0/1. */
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105 #define NUMPERIPHERAL (sizeof(dmaHwIf) / sizeof (DmaHardwareInterface))
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107 /*----------------------------------------------------------------------------
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108 * Exported functions
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109 *----------------------------------------------------------------------------*/
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112 * \brief Get peripheral identifier coded for hardware handshaking interface
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114 * \param bDmac DMA Controller number.
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115 * \param bPeriphID Peripheral ID.
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116 * \param bTransfer Transfer type 0: Tx, 1 :Rx.
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117 * \return 0-15 peripheral identifier coded.
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118 * 0xff : no associated peripheral identifier coded.
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120 uint8_t DMAIF_Get_ChannelNumber (uint8_t bDmac,
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121 uint8_t bPeriphID,
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125 for (i = 0; i < NUMPERIPHERAL; i++)
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127 if ((dmaHwIf[i].bDmac == bDmac) && (dmaHwIf[i].bPeriphID == bPeriphID) && (dmaHwIf[i].bTransfer == bTransfer))
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129 return dmaHwIf[i].bIfID;
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136 * \brief Check if the given DMAC has associated peripheral identifier coded by
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137 * the given peripheral.
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139 * \param bDmac DMA Controller number.
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140 * \param bPeriphID Peripheral ID (0xff : memory only).
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141 * \return 1: Is a validated peripher. 0: no associated peripheral identifier coded.
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143 uint8_t DMAIF_IsValidatedPeripherOnDma( uint8_t bDmac, uint8_t bPeriphID)
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146 /* It is always validated when transfer to memory */
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147 if (bPeriphID == 0xFF) {
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150 for (i = 0; i < NUMPERIPHERAL; i++)
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152 if ((dmaHwIf[i].bDmac == bDmac) && (dmaHwIf[i].bPeriphID == bPeriphID))
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