Jonne Valola / PokittoLib Featured

PokittoLib is the library needed for programming the Pokitto DIY game console (www.pokitto.com)

Dependents:   YATTT sd_map_test cPong SnowDemo ... more

PokittoLib

Library for programming Pokitto hardware

How to Use

  1. Import this library to online compiler (see button "import" on the right hand side
  2. DO NOT import mbed-src anymore, a better version is now included inside PokittoLib
  3. Change My_settings.h according to your project
  4. Start coding!

POKITTO_HW/dma_11u6x.c@30:796f9611d2ac, 2018-01-30 (annotated)

Committer:
Pokitto
Date:
Tue Jan 30 10:41:12 2018 +0000
Revision:
30:796f9611d2ac
Sound enhancements done

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Pokitto 30:796f9611d2ac 1 /*
Pokitto 30:796f9611d2ac 2 * @brief LPC11u6x DMA chip driver
Pokitto 30:796f9611d2ac 3 *
Pokitto 30:796f9611d2ac 4 * @note
Pokitto 30:796f9611d2ac 5 * Copyright(C) NXP Semiconductors, 2013
Pokitto 30:796f9611d2ac 6 * All rights reserved.
Pokitto 30:796f9611d2ac 7 *
Pokitto 30:796f9611d2ac 8 * @par
Pokitto 30:796f9611d2ac 9 * Software that is described herein is for illustrative purposes only
Pokitto 30:796f9611d2ac 10 * which provides customers with programming information regarding the
Pokitto 30:796f9611d2ac 11 * LPC products. This software is supplied "AS IS" without any warranties of
Pokitto 30:796f9611d2ac 12 * any kind, and NXP Semiconductors and its licensor disclaim any and
Pokitto 30:796f9611d2ac 13 * all warranties, express or implied, including all implied warranties of
Pokitto 30:796f9611d2ac 14 * merchantability, fitness for a particular purpose and non-infringement of
Pokitto 30:796f9611d2ac 15 * intellectual property rights. NXP Semiconductors assumes no responsibility
Pokitto 30:796f9611d2ac 16 * or liability for the use of the software, conveys no license or rights under any
Pokitto 30:796f9611d2ac 17 * patent, copyright, mask work right, or any other intellectual property rights in
Pokitto 30:796f9611d2ac 18 * or to any products. NXP Semiconductors reserves the right to make changes
Pokitto 30:796f9611d2ac 19 * in the software without notification. NXP Semiconductors also makes no
Pokitto 30:796f9611d2ac 20 * representation or warranty that such application will be suitable for the
Pokitto 30:796f9611d2ac 21 * specified use without further testing or modification.
Pokitto 30:796f9611d2ac 22 *
Pokitto 30:796f9611d2ac 23 * @par
Pokitto 30:796f9611d2ac 24 * Permission to use, copy, modify, and distribute this software and its
Pokitto 30:796f9611d2ac 25 * documentation is hereby granted, under NXP Semiconductors' and its
Pokitto 30:796f9611d2ac 26 * licensor's relevant copyrights in the software, without fee, provided that it
Pokitto 30:796f9611d2ac 27 * is used in conjunction with NXP Semiconductors microcontrollers. This
Pokitto 30:796f9611d2ac 28 * copyright, permission, and disclaimer notice must appear in all copies of
Pokitto 30:796f9611d2ac 29 * this code.
Pokitto 30:796f9611d2ac 30 */
Pokitto 30:796f9611d2ac 31
Pokitto 30:796f9611d2ac 32 //#include "lpc_defs.h"
Pokitto 30:796f9611d2ac 33 #include "dma_11u6x.h"
Pokitto 30:796f9611d2ac 34
Pokitto 30:796f9611d2ac 35 #define false 0
Pokitto 30:796f9611d2ac 36 #define true 1
Pokitto 30:796f9611d2ac 37
Pokitto 30:796f9611d2ac 38 /*****************************************************************************
Pokitto 30:796f9611d2ac 39 * Private types/enumerations/variables
Pokitto 30:796f9611d2ac 40 ****************************************************************************/
Pokitto 30:796f9611d2ac 41
Pokitto 30:796f9611d2ac 42 /*****************************************************************************
Pokitto 30:796f9611d2ac 43 * Public types/enumerations/variables
Pokitto 30:796f9611d2ac 44 ****************************************************************************/
Pokitto 30:796f9611d2ac 45
Pokitto 30:796f9611d2ac 46 #ifdef __cplusplus
Pokitto 30:796f9611d2ac 47 extern "C" {
Pokitto 30:796f9611d2ac 48 #endif
Pokitto 30:796f9611d2ac 49
Pokitto 30:796f9611d2ac 50 /* DMA SRAM table - this can be optionally used with the Chip_DMA_SetSRAMBase()
Pokitto 30:796f9611d2ac 51 function if a DMA SRAM table is needed. This table is correctly aligned for
Pokitto 30:796f9611d2ac 52 the DMA controller. */
Pokitto 30:796f9611d2ac 53 #if defined(__CC_ARM)
Pokitto 30:796f9611d2ac 54 /* Keil alignement to 256 bytes */
Pokitto 30:796f9611d2ac 55 __align(256) DMA_CHDESC_T Chip_DMA_Table[MAX_DMA_CHANNEL];
Pokitto 30:796f9611d2ac 56 #endif /* defined (__CC_ARM) */
Pokitto 30:796f9611d2ac 57
Pokitto 30:796f9611d2ac 58 /* IAR support */
Pokitto 30:796f9611d2ac 59 #if defined(__ICCARM__)
Pokitto 30:796f9611d2ac 60 /* IAR EWARM alignement to 256 bytes */
Pokitto 30:796f9611d2ac 61 #pragma data_alignment=256
Pokitto 30:796f9611d2ac 62 DMA_CHDESC_T Chip_DMA_Table[MAX_DMA_CHANNEL];
Pokitto 30:796f9611d2ac 63 #endif /* defined (__ICCARM__) */
Pokitto 30:796f9611d2ac 64
Pokitto 30:796f9611d2ac 65 #if defined( __GNUC__ )
Pokitto 30:796f9611d2ac 66 /* GNU alignement to 256 bytes */
Pokitto 30:796f9611d2ac 67 DMA_CHDESC_T Chip_DMA_Table[MAX_DMA_CHANNEL] __attribute__ ((aligned(256)));
Pokitto 30:796f9611d2ac 68 #endif /* defined (__GNUC__) */
Pokitto 30:796f9611d2ac 69
Pokitto 30:796f9611d2ac 70 #ifdef __cplusplus
Pokitto 30:796f9611d2ac 71 }
Pokitto 30:796f9611d2ac 72 #endif
Pokitto 30:796f9611d2ac 73
Pokitto 30:796f9611d2ac 74 /*****************************************************************************
Pokitto 30:796f9611d2ac 75 * Private functions
Pokitto 30:796f9611d2ac 76 ****************************************************************************/
Pokitto 30:796f9611d2ac 77
Pokitto 30:796f9611d2ac 78 /*****************************************************************************
Pokitto 30:796f9611d2ac 79 * Public functions
Pokitto 30:796f9611d2ac 80 ****************************************************************************/
Pokitto 30:796f9611d2ac 81
Pokitto 30:796f9611d2ac 82 /* Set DMA transfer register interrupt bits (safe) */
Pokitto 30:796f9611d2ac 83 void Chip_DMA_SetTranBits(LPC_DMA_T *pDMA, DMA_CHID_T ch, uint32_t mask)
Pokitto 30:796f9611d2ac 84 {
Pokitto 30:796f9611d2ac 85 uint32_t temp;
Pokitto 30:796f9611d2ac 86
Pokitto 30:796f9611d2ac 87 /* Read and write values may not be the same, write 0 to
Pokitto 30:796f9611d2ac 88 undefined bits */
Pokitto 30:796f9611d2ac 89 temp = pDMA->DMACH[ch].XFERCFG & ~0xFC000CC0;
Pokitto 30:796f9611d2ac 90
Pokitto 30:796f9611d2ac 91 pDMA->DMACH[ch].XFERCFG = temp | mask;
Pokitto 30:796f9611d2ac 92 }
Pokitto 30:796f9611d2ac 93
Pokitto 30:796f9611d2ac 94 /* Clear DMA transfer register interrupt bits (safe) */
Pokitto 30:796f9611d2ac 95 void Chip_DMA_ClearTranBits(LPC_DMA_T *pDMA, DMA_CHID_T ch, uint32_t mask)
Pokitto 30:796f9611d2ac 96 {
Pokitto 30:796f9611d2ac 97 uint32_t temp;
Pokitto 30:796f9611d2ac 98
Pokitto 30:796f9611d2ac 99 /* Read and write values may not be the same, write 0 to
Pokitto 30:796f9611d2ac 100 undefined bits */
Pokitto 30:796f9611d2ac 101 temp = pDMA->DMACH[ch].XFERCFG & ~0xFC000CC0;
Pokitto 30:796f9611d2ac 102
Pokitto 30:796f9611d2ac 103 pDMA->DMACH[ch].XFERCFG = temp & ~mask;
Pokitto 30:796f9611d2ac 104 }
Pokitto 30:796f9611d2ac 105
Pokitto 30:796f9611d2ac 106 /* Update the transfer size in an existing DMA channel transfer configuration */
Pokitto 30:796f9611d2ac 107 void Chip_DMA_SetupChannelTransferSize(LPC_DMA_T *pDMA, DMA_CHID_T ch, uint32_t trans)
Pokitto 30:796f9611d2ac 108 {
Pokitto 30:796f9611d2ac 109 Chip_DMA_ClearTranBits(pDMA, ch, (0x3FF << 16));
Pokitto 30:796f9611d2ac 110 Chip_DMA_SetTranBits(pDMA, ch, DMA_XFERCFG_XFERCOUNT(trans));
Pokitto 30:796f9611d2ac 111 }
Pokitto 30:796f9611d2ac 112
Pokitto 30:796f9611d2ac 113 /* Sets up a DMA channel with the passed DMA transfer descriptor */
Pokitto 30:796f9611d2ac 114 bool Chip_DMA_SetupTranChannel(LPC_DMA_T *pDMA, DMA_CHID_T ch, DMA_CHDESC_T *desc)
Pokitto 30:796f9611d2ac 115 {
Pokitto 30:796f9611d2ac 116 bool good = false;
Pokitto 30:796f9611d2ac 117 DMA_CHDESC_T *pDesc = (DMA_CHDESC_T *) pDMA->SRAMBASE;
Pokitto 30:796f9611d2ac 118
Pokitto 30:796f9611d2ac 119 if ((Chip_DMA_GetActiveChannels(pDMA) & (1 << ch)) == 0) {
Pokitto 30:796f9611d2ac 120 /* Channel is not active, so update the descriptor */
Pokitto 30:796f9611d2ac 121 pDesc[ch] = *desc;
Pokitto 30:796f9611d2ac 122
Pokitto 30:796f9611d2ac 123 good = true;
Pokitto 30:796f9611d2ac 124 }
Pokitto 30:796f9611d2ac 125
Pokitto 30:796f9611d2ac 126 return good;
Pokitto 30:796f9611d2ac 127 }
Pokitto 30:796f9611d2ac 128