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contiki/cpu/cc2538/dev/udma.h

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New Platform: TI CC2538 Development Kit This commit adds cpu, platform and example files, providing support for running Contiki on TI's cc2538 DK
2013-01-12 22:44:42 +00:00
/*
* Copyright (c) 2013, Texas Instruments Incorporated - http://www.ti.com/
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS 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.
*/
/**
* \addtogroup cc2538
* @{
*
* \defgroup cc2538-udma cc2538 micro-DMA
*
* Driver for the cc2538 uDMA controller
* @{
*
* \file
* Header file with register, macro and function declarations for the cc2538
* micro-DMA controller module
*/
#ifndef UDMA_H_
#define UDMA_H_
#include "contiki-conf.h"
/*
* Enable all uDMA channels unless a conf file tells us to do otherwise.
* Using all 31 channels will consume a lot of RAM for the channel control
* data structure. Thus it's wise to set this define to the number of the
* highest channel in use
*/
#ifndef UDMA_CONF_MAX_CHANNEL
#define UDMA_CONF_MAX_CHANNEL 31
#endif
/*---------------------------------------------------------------------------*/
/**
* \name uDMA Register offset declarations
* @{
*/
#define UDMA_STAT 0x400FF000 /**< DMA status */
#define UDMA_CFG 0x400FF004 /**< DMA configuration */
#define UDMA_CTLBASE 0x400FF008 /**< DMA channel control base pointer */
#define UDMA_ALTBASE 0x400FF00C /**< DMA alternate channel control base pointer */
#define UDMA_WAITSTAT 0x400FF010 /**< DMA channel wait-on-request status */
#define UDMA_SWREQ 0x400FF014 /**< DMA channel software request */
#define UDMA_USEBURSTSET 0x400FF018 /**< DMA channel useburst set */
#define UDMA_USEBURSTCLR 0x400FF01C /**< DMA channel useburst clear */
#define UDMA_REQMASKSET 0x400FF020 /**< DMA channel request mask set */
#define UDMA_REQMASKCLR 0x400FF024 /**< DMA channel request mask clear */
#define UDMA_ENASET 0x400FF028 /**< DMA channel enable set */
#define UDMA_ENACLR 0x400FF02C /**< DMA channel enable clear */
#define UDMA_ALTSET 0x400FF030 /**< DMA channel primary alternate set */
#define UDMA_ALTCLR 0x400FF034 /**< DMA channel primary alternate clear */
#define UDMA_PRIOSET 0x400FF038 /**< DMA channel priority set */
#define UDMA_PRIOCLR 0x400FF03C /**< DMA channel priority clear */
#define UDMA_ERRCLR 0x400FF04C /**< DMA bus error clear */
#define UDMA_CHASGN 0x400FF500 /**< DMA channel assignment */
#define UDMA_CHIS 0x400FF504 /**< DMA channel interrupt status */
#define UDMA_CHMAP0 0x400FF510 /**< DMA channel map select 0 */
#define UDMA_CHMAP1 0x400FF514 /**< DMA channel map select 1 */
#define UDMA_CHMAP2 0x400FF518 /**< DMA channel map select 2 */
#define UDMA_CHMAP3 0x400FF51C /**< DMA channel map select 3 */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_STAT register bit masks
* @{
*/
#define UDMA_STAT_DMACHANS 0x001F0000 /**< Available uDMA channels minus 1 */
#define UDMA_STAT_STATE 0x000000F0 /**< Control state machine status */
#define UDMA_STAT_MASTEN 0x00000001 /**< Master enable status */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_CFG register bit masks
* @{
*/
#define UDMA_CFG_MASTEN 0x00000001 /**< Controller master enable */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_CTLBASE register bit masks
* @{
*/
#define UDMA_CTLBASE_ADDR 0xFFFFFC00 /**< Channel control base address */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_ALTBASE register bit masks
* @{
*/
#define UDMA_ALTBASE_ADDR 0xFFFFFFFF /**< Alternate channel address pointer */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_WAITSTAT register bit masks
* @{
*/
#define UDMA_WAITSTAT_WAITREQ 0xFFFFFFFF /**< Channel [n] wait status */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_SWREQ register bit masks
* @{
*/
#define UDMA_SWREQ_SWREQ 0xFFFFFFFF /**< Channel [n] software request */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_USEBURSTSET register bit masks
* @{
*/
#define UDMA_USEBURSTSET_SET 0xFFFFFFFF /**< Channel [n] useburst set */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_USEBURSTCLR register bit masks
* @{
*/
#define UDMA_USEBURSTCLR_CLR 0xFFFFFFFF /**< Channel [n] useburst clear */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_REQMASKSET register bit masks
* @{
*/
#define UDMA_REQMASKSET_SET 0xFFFFFFFF /**< Channel [n] request mask set */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_REQMASKCLR register bit masks
* @{
*/
#define UDMA_REQMASKCLR_CLR 0xFFFFFFFF /**< Channel [n] request mask clear */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_ENASET register bit masks
* @{
*/
#define UDMA_ENASET_SET 0xFFFFFFFF /**< Channel [n] enable set */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_ENACLR register bit masks
* @{
*/
#define UDMA_ENACLR_CLR 0xFFFFFFFF /**< Channel [n] enable clear */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_ALTSET register bit masks
* @{
*/
#define UDMA_ALTSET_SET 0xFFFFFFFF /**< Channel [n] alternate set */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_ALTCLR register bit masks
* @{
*/
#define UDMA_ALTCLR_CLR 0xFFFFFFFF /**< Channel [n] alternate clear */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_PRIOSET register bit masks
* @{
*/
#define UDMA_PRIOSET_SET 0xFFFFFFFF /**< Channel [n] priority set */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_PRIOCLR register bit masks
* @{
*/
#define UDMA_PRIOCLR_CLR 0xFFFFFFFF /**< Channel [n] priority clear */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_ERRCLR register bit masks
* @{
*/
#define UDMA_ERRCLR_ERRCLR 0x00000001 /**< uDMA bus error status */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_CHASGN register bit masks
* @{
*/
#define UDMA_CHASGN_CHASGN 0xFFFFFFFF /**< Channel [n] assignment select */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_CHIS register bit masks
* @{
*/
#define UDMA_CHIS_CHIS 0xFFFFFFFF /**< Channel [n] interrupt status */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_CHMAP0 register bit masks
* @{
*/
#define UDMA_CHMAP0_CH7SEL 0xF0000000 /**< uDMA channel 7 source select */
#define UDMA_CHMAP0_CH6SEL 0x0F000000 /**< uDMA channel 6 source select */
#define UDMA_CHMAP0_CH5SEL 0x00F00000 /**< uDMA channel 5 source select */
#define UDMA_CHMAP0_CH4SEL 0x000F0000 /**< uDMA channel 4 source select */
#define UDMA_CHMAP0_CH3SEL 0x0000F000 /**< uDMA channel 3 source select */
#define UDMA_CHMAP0_CH2SEL 0x00000F00 /**< uDMA channel 2 source select */
#define UDMA_CHMAP0_CH1SEL 0x000000F0 /**< uDMA channel 1 source select */
#define UDMA_CHMAP0_CH0SEL 0x0000000F /**< uDMA channel 0 source select */
/** @} */
/*---------------------------------------------------------------------------*/
/** \name UDMA_CHMAP1 register bit masks
* @{
*/
#define UDMA_CHMAP1_CH15SEL 0xF0000000 /**< uDMA channel 15 source select */
#define UDMA_CHMAP1_CH14SEL 0x0F000000 /**< uDMA channel 14 source select */
#define UDMA_CHMAP1_CH13SEL 0x00F00000 /**< uDMA channel 13 source select */
#define UDMA_CHMAP1_CH12SEL 0x000F0000 /**< uDMA channel 12 source select */
#define UDMA_CHMAP1_CH11SEL 0x0000F000 /**< uDMA channel 11 source select */
#define UDMA_CHMAP1_CH10SEL 0x00000F00 /**< uDMA channel 10 source select */
#define UDMA_CHMAP1_CH9SEL 0x000000F0 /**< uDMA channel 9 source select */
#define UDMA_CHMAP1_CH8SEL 0x0000000F /**< uDMA channel 8 source select */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_CHMAP2 register bit masks
* @{
*/
#define UDMA_CHMAP2_CH23SEL 0xF0000000 /**< uDMA channel 23 source select */
#define UDMA_CHMAP2_CH22SEL 0x0F000000 /**< uDMA channel 22 source select */
#define UDMA_CHMAP2_CH21SEL 0x00F00000 /**< uDMA channel 21 source select */
#define UDMA_CHMAP2_CH20SEL 0x000F0000 /**< uDMA channel 20 source select */
#define UDMA_CHMAP2_CH19SEL 0x0000F000 /**< uDMA channel 19 source select */
#define UDMA_CHMAP2_CH18SEL 0x00000F00 /**< uDMA channel 18 source select */
#define UDMA_CHMAP2_CH17SEL 0x000000F0 /**< uDMA channel 17 source select */
#define UDMA_CHMAP2_CH16SEL 0x0000000F /**< uDMA channel 16 source select */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name UDMA_CHMAP3 register bit masks
* @{
*/
#define UDMA_CHMAP3_CH31SEL 0xF0000000 /**< uDMA channel 31 source select */
#define UDMA_CHMAP3_CH30SEL 0x0F000000 /**< uDMA channel 30 source select */
#define UDMA_CHMAP3_CH29SEL 0x00F00000 /**< uDMA channel 29 source select */
#define UDMA_CHMAP3_CH28SEL 0x000F0000 /**< uDMA channel 28 source select */
#define UDMA_CHMAP3_CH27SEL 0x0000F000 /**< uDMA channel 27 source select */
#define UDMA_CHMAP3_CH26SEL 0x00000F00 /**< uDMA channel 26 source select */
#define UDMA_CHMAP3_CH25SEL 0x000000F0 /**< uDMA channel 25 source select */
#define UDMA_CHMAP3_CH24SEL 0x0000000F /**< uDMA channel 24 source select */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name uDMA Channel encoding assignments
* @{
*/
/* Channel 0 */
#define UDMA_CH0_RESERVED0 0x00
#define UDMA_CH0_RESERVED1 0x01
#define UDMA_CH0_RESERVED2 0x02
#define UDMA_CH0_RESERVED3 0x03
#define UDMA_CH0_USB 0x04
/* Channel 1 */
#define UDMA_CH1_RESERVED0 0x00
#define UDMA_CH1_RESERVED1 0x01
#define UDMA_CH1_RESERVED2 0x02
#define UDMA_CH1_RESERVED3 0x03
#define UDMA_CH1_ADC 0x04
/* Channel 2 */
#define UDMA_CH2_RESERVED0 0x00
#define UDMA_CH2_TIMER3A 0x01
#define UDMA_CH2_RESERVED2 0x02
#define UDMA_CH2_RESERVED3 0x03
#define UDMA_CH2_FLASH 0x04
/* Channel 3 */
#define UDMA_CH3_RESERVED0 0x00
#define UDMA_CH3_TIMER3B 0x01
#define UDMA_CH3_RESERVED2 0x02
#define UDMA_CH3_RESERVED3 0x03
#define UDMA_CH3_RFCORETRG1 0x04
/* Channel 4 */
#define UDMA_CH4_RESERVED0 0x00
#define UDMA_CH4_TIMER2A 0x01
#define UDMA_CH4_RESERVED2 0x02
#define UDMA_CH4_RESERVED3 0x03
#define UDMA_CH4_RFCORETRG2 0x04
/* Channel 5 */
#define UDMA_CH5_RESERVED0 0x00
#define UDMA_CH5_TIMER2B 0x01
#define UDMA_CH5_RESERVED2 0x02
#define UDMA_CH5_RESERVED3 0x03
#define UDMA_CH5_RESERVED4 0x04
/* Channel 6 */
#define UDMA_CH6_RESERVED0 0x00
#define UDMA_CH6_TIMER2A 0x01
#define UDMA_CH6_RESERVED2 0x02
#define UDMA_CH6_RESERVED3 0x03
#define UDMA_CH6_RESERVED4 0x04
/* Channel 7 */
#define UDMA_CH7_RESERVED0 0x00
#define UDMA_CH7_TIMER2B 0x01
#define UDMA_CH7_RESERVED2 0x02
#define UDMA_CH7_RESERVED3 0x03
#define UDMA_CH7_RESERVED4 0x04
/* Channel 8 */
#define UDMA_CH8_UART0RX 0x00
#define UDMA_CH8_UART1RX 0x01
#define UDMA_CH8_RESERVED2 0x02
#define UDMA_CH8_RESERVED3 0x03
#define UDMA_CH8_RESERVED4 0x04
/* Channel 9 */
#define UDMA_CH9_UART0TX 0x00
#define UDMA_CH9_UART1TX 0x01
#define UDMA_CH9_RESERVED2 0x02
#define UDMA_CH9_RESERVED3 0x03
#define UDMA_CH9_RESERVED4 0x04
/* Channel 10 */
#define UDMA_CH10_SSI0RX 0x00
#define UDMA_CH10_SSI1RX 0x01
#define UDMA_CH10_RESERVED2 0x02
#define UDMA_CH10_RESERVED3 0x03
#define UDMA_CH10_RESERVED4 0x04
/* Channel 11 */
#define UDMA_CH11_SSI0TX 0x00
#define UDMA_CH11_SSI1TX 0x01
#define UDMA_CH11_RESERVED2 0x02
#define UDMA_CH11_RESERVED3 0x03
#define UDMA_CH11_RESERVED4 0x04
/* Channel 12 */
#define UDMA_CH12_RESERVED0 0x00
#define UDMA_CH12_RESERVED1 0x01
#define UDMA_CH12_RESERVED2 0x02
#define UDMA_CH12_RESERVED3 0x03
#define UDMA_CH12_RESERVED4 0x04
/* Channel 13 */
#define UDMA_CH13_RESERVED0 0x00
#define UDMA_CH13_RESERVED1 0x01
#define UDMA_CH13_RESERVED2 0x02
#define UDMA_CH13_RESERVED3 0x03
#define UDMA_CH13_RESERVED4 0x04
/* Channel 14 */
#define UDMA_CH14_ADC0 0x00
#define UDMA_CH14_TIMER2A 0x01
#define UDMA_CH14_RESERVED2 0x02
#define UDMA_CH14_RESERVED3 0x03
#define UDMA_CH14_RESERVED4 0x04
/* Channel 15 */
#define UDMA_CH15_ADC1 0x00
#define UDMA_CH15_TIMER2B 0x01
#define UDMA_CH15_RESERVED2 0x02
#define UDMA_CH15_RESERVED3 0x03
#define UDMA_CH15_RESERVED4 0x04
/* Channel 16 */
#define UDMA_CH16_ADC2 0x00
#define UDMA_CH16_RESERVED1 0x01
#define UDMA_CH16_RESERVED2 0x02
#define UDMA_CH16_RESERVED3 0x03
#define UDMA_CH16_RESERVED4 0x04
/* Channel 17 */
#define UDMA_CH17_ADC3 0x00
#define UDMA_CH17_RESERVED1 0x01
#define UDMA_CH17_RESERVED2 0x02
#define UDMA_CH17_RESERVED3 0x03
#define UDMA_CH17_RESERVED4 0x04
/* Channel 18 */
#define UDMA_CH18_TIMER0A 0x00
#define UDMA_CH18_TIMER1A 0x01
#define UDMA_CH18_RESERVED2 0x02
#define UDMA_CH18_RESERVED3 0x03
#define UDMA_CH18_RESERVED4 0x04
/* Channel 19 */
#define UDMA_CH19_TIMER0B 0x00
#define UDMA_CH19_TIMER1B 0x01
#define UDMA_CH19_RESERVED2 0x02
#define UDMA_CH19_RESERVED3 0x03
#define UDMA_CH19_RESERVED4 0x04
/* Channel 20 */
#define UDMA_CH20_TIMER1A 0x00
#define UDMA_CH20_RESERVED1 0x01
#define UDMA_CH20_RESERVED2 0x02
#define UDMA_CH20_RESERVED3 0x03
#define UDMA_CH20_RESERVED4 0x04
/* Channel 21 */
#define UDMA_CH21_TIMER1B 0x00
#define UDMA_CH21_RESERVED1 0x01
#define UDMA_CH21_RESERVED2 0x02
#define UDMA_CH21_RESERVED3 0x03
#define UDMA_CH21_RESERVED4 0x04
/* Channel 22 */
#define UDMA_CH22_UART1RX 0x00
#define UDMA_CH22_RESERVED1 0x01
#define UDMA_CH22_RESERVED2 0x02
#define UDMA_CH22_RESERVED3 0x03
#define UDMA_CH22_RESERVED4 0x04
/* Channel 23 */
#define UDMA_CH23_UART1TX 0x00
#define UDMA_CH23_RESERVED1 0x01
#define UDMA_CH23_RESERVED2 0x02
#define UDMA_CH23_RESERVED3 0x03
#define UDMA_CH23_RESERVED4 0x04
/* Channel 24 */
#define UDMA_CH24_SSI1RX 0x00
#define UDMA_CH24_ADC4 0x01
#define UDMA_CH24_RESERVED2 0x02
#define UDMA_CH24_RESERVED3 0x03
#define UDMA_CH24_RESERVED4 0x04
/* Channel 25 */
#define UDMA_CH25_SSI1TX 0x00
#define UDMA_CH25_ADC5 0x01
#define UDMA_CH25_RESERVED2 0x02
#define UDMA_CH25_RESERVED3 0x03
#define UDMA_CH25_RESERVED4 0x04
/* Channel 26 */
#define UDMA_CH26_RESERVED0 0x00
#define UDMA_CH26_ADC6 0x01
#define UDMA_CH26_RESERVED2 0x02
#define UDMA_CH26_RESERVED3 0x03
#define UDMA_CH26_RESERVED4 0x04
/* Channel 27 */
#define UDMA_CH27_RESERVED0 0x00
#define UDMA_CH27_ADC7 0x01
#define UDMA_CH27_RESERVED2 0x02
#define UDMA_CH27_RESERVED3 0x03
#define UDMA_CH27_RESERVED4 0x04
/* Channel 28 */
#define UDMA_CH28_RESERVED0 0x00
#define UDMA_CH28_RESERVED1 0x01
#define UDMA_CH28_RESERVED2 0x02
#define UDMA_CH28_RESERVED3 0x03
#define UDMA_CH28_RESERVED4 0x04
/* Channel 29 */
#define UDMA_CH29_RESERVED0 0x00
#define UDMA_CH29_RESERVED1 0x01
#define UDMA_CH29_RESERVED2 0x02
#define UDMA_CH29_RESERVED3 0x03
#define UDMA_CH29_RFCORET2TRG1 0x04
/* Channel 30 */
#define UDMA_CH30_SW 0x00
#define UDMA_CH30_RESERVED1 0x01
#define UDMA_CH30_RESERVED2 0x02
#define UDMA_CH30_RESERVED3 0x03
#define UDMA_CH30_RFCORET2TRG2 0x04
/* Channel 31 */
#define UDMA_CH31_RESERVED0 0x00
#define UDMA_CH31_RESERVED1 0x01
#define UDMA_CH31_RESERVED2 0x02
#define UDMA_CH31_RESERVED3 0x03
#define UDMA_CH31_RESERVED4 0x04
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name Values to ORd together as the ctrl argument of
* udma_set_channel_control_word()
* @{
*/
#define UDMA_CHCTL_DSTINC_NONE 0xC0000000 /**< Dst address no increment */
#define UDMA_CHCTL_DSTINC_32 0x80000000 /**< Dst address increment 32 bit */
#define UDMA_CHCTL_DSTINC_16 0x40000000 /**< Dst address increment 16 bit */
#define UDMA_CHCTL_DSTINC_8 0x00000000 /**< Dst address increment 8 bit */
#define UDMA_CHCTL_DSTSIZE_32 0x20000000 /**< Destination size 32 bit */
#define UDMA_CHCTL_DSTSIZE_16 0x10000000 /**< Destination size 16 bit */
#define UDMA_CHCTL_DSTSIZE_8 0x00000000 /**< Destination size 8 bit */
#define UDMA_CHCTL_SRCINC_NONE 0x0C000000 /**< Source address no increment */
#define UDMA_CHCTL_SRCINC_32 0x08000000 /**< Source address increment 32 bit */
#define UDMA_CHCTL_SRCINC_16 0x04000000 /**< Source address increment 16 bit */
#define UDMA_CHCTL_SRCINC_8 0x00000000 /**< Source address increment 8 bit */
#define UDMA_CHCTL_SRCSIZE_32 0x02000000 /**< Source size 32 bit */
#define UDMA_CHCTL_SRCSIZE_16 0x01000000 /**< Source size 16 bit */
#define UDMA_CHCTL_SRCSIZE_8 0x00000000 /**< Source size 8 bit */
#define UDMA_CHCTL_ARBSIZE_1 0x00000000 /**< Arbitration size 1 Transfer */
#define UDMA_CHCTL_ARBSIZE_2 0x00004000 /**< Arbitration size 2 Transfers */
#define UDMA_CHCTL_ARBSIZE_4 0x00008000 /**< Arbitration size 4 Transfers */
#define UDMA_CHCTL_ARBSIZE_8 0x0000C000 /**< Arbitration size 8 Transfers */
#define UDMA_CHCTL_ARBSIZE_16 0x00010000 /**< Arbitration size 16 Transfers */
#define UDMA_CHCTL_ARBSIZE_32 0x00014000 /**< Arbitration size 32 Transfers */
#define UDMA_CHCTL_ARBSIZE_64 0x00018000 /**< Arbitration size 64 Transfers */
#define UDMA_CHCTL_ARBSIZE_128 0x0001C000 /**< Arbitration size 128 Transfers */
#define UDMA_CHCTL_ARBSIZE_256 0x00020000 /**< Arbitration size 256 Transfers */
#define UDMA_CHCTL_ARBSIZE_512 0x00024000 /**< Arbitration size 512 Transfers */
#define UDMA_CHCTL_ARBSIZE_1024 0x00028000 /**< Arbitration size 1024 Transfers */
#define UDMA_CHCTL_XFERMODE_STOP 0x00000000 /**< Stop */
#define UDMA_CHCTL_XFERMODE_BASIC 0x00000001 /**< Basic */
#define UDMA_CHCTL_XFERMODE_AUTO 0x00000002 /**< Auto-Request */
#define UDMA_CHCTL_XFERMODE_PINGPONG 0x00000003 /**< Ping-Pong */
#define UDMA_CHCTL_XFERMODE_MEM_SG 0x00000004 /**< Memory Scatter-Gather */
#define UDMA_CHCTL_XFERMODE_MEM_SGA 0x00000005 /**< Memory Scatter-Gather Alt */
#define UDMA_CHCTL_XFERMODE_PER_SG 0x00000006 /**< Peripheral Scatter-Gather */
#define UDMA_CHCTL_XFERMODE_PER_SGA 0x00000007 /**< Peripheral Scatter-Gather Alt */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \brief Initialise the uDMA driver
*
* Prepares the channel control structure and enables the controller
*/
void udma_init(void);
/**
* \brief Sets the channels source address
* \param channel The channel as a value in [0 , UDMA_CONF_MAX_CHANNEL]
* \param
*/
void udma_set_channel_src(uint8_t channel, uint32_t src_end);
/**
* \brief
* \param channel The channel as a value in [0 , UDMA_CONF_MAX_CHANNEL]
*/
void udma_set_channel_dst(uint8_t channel, uint32_t dst_end);
/**
* \brief Configure the channel's control word
* \param channel The channel as a value in [0 , UDMA_CONF_MAX_CHANNEL]
* \param ctrl The value of the control word
*
* The value of the control word is generated by ORing the values defined as
* UDMA_CHCTL_xyz
*
* For example, to configure a channel with 8 bit source and destination size,
* 0 source increment and 8 bit destination increment, one would need to pass
* UDMA_CHCTL_DSTINC_8 | UDMA_CHCTL_SRCINC_NONE | UDMA_CHCTL_SRCSIZE_8 |
* UDMA_CHCTL_DSTSIZE_8
*
* Macros defined as 0 can be omitted.
*/
void udma_set_channel_control_word(uint8_t channel, uint32_t ctrl);
/**
* \brief Choose an encoding for a uDMA channel
* \param channel The channel as a value in [0 , UDMA_CONF_MAX_CHANNEL]
* \param enc A value in [0 , 4]
*
* Possible values for the \e encoding param are defined as UDMA_CHnn_xyz
*/
void udma_set_channel_assignment(uint8_t channel, uint8_t enc);
/**
* \brief Enables a uDMA channel
* \param channel The channel as a value in [0 , UDMA_CONF_MAX_CHANNEL]
*/
void udma_channel_enable(uint8_t channel);
/**
* \brief Disables a uDMA channel
* \param channel The channel as a value in [0 , UDMA_CONF_MAX_CHANNEL]
*/
void udma_channel_disable(uint8_t channel);
/**
* \brief Use the alternate control data structure for a channel
* \param channel The channel as a value in [0 , UDMA_CONF_MAX_CHANNEL]
*
* \note Currently, the driver only reserves memory space for primary contrl
* data structures
*/
void udma_channel_use_alternate(uint8_t channel);
/**
* \brief Use the primary control data structure for a channel
* \param channel The channel as a value in [0 , UDMA_CONF_MAX_CHANNEL]
*/
void udma_channel_use_primary(uint8_t channel);
/**
* \brief Set a uDMA channel to high priority
* \param channel The channel as a value in [0 , UDMA_CONF_MAX_CHANNEL]
*/
void udma_channel_prio_set_high(uint8_t channel);
/**
* \brief Set a uDMA channel to default priority
* \param channel The channel as a value in [0 , UDMA_CONF_MAX_CHANNEL]
*/
void udma_channel_prio_set_default(uint8_t channel);
/**
* \brief Configure a channel to only use burst transfers
* \param channel The channel as a value in [0 , UDMA_CONF_MAX_CHANNEL]
*
* \note The uDMA controller may under certain conditions automatically disable
* burst mode, in which case this function will need to be called again to
* re-enable them
*/
void udma_channel_use_burst(uint8_t channel);
/**
* \brief Configure a channel to use single as well as burst requests
* \param channel The channel as a value in [0 , UDMA_CONF_MAX_CHANNEL]
*/
void udma_channel_use_single(uint8_t channel);
/**
* \brief Disable peripheral triggers for a uDMA channel
* \param channel The channel as a value in [0 , UDMA_CONF_MAX_CHANNEL]
*
* Calling this function will result in the uDMA controller not acknowledging
* peripheral-generated transfer triggers. Afterwards, the channel may be used
* with software triggers
*/
void udma_channel_mask_set(uint8_t channel);
/**
* \brief Enable peripheral triggers for a uDMA channel
* \param channel The channel as a value in [0 , UDMA_CONF_MAX_CHANNEL]
*/
void udma_channel_mask_clr(uint8_t channel);
/**
* \brief Generate a software trigger to start a transfer
* \param channel The channel as a value in [0 , UDMA_CONF_MAX_CHANNEL]
*/
void udma_channel_sw_request(uint8_t channel);
/**
* \brief Retrieve the current mode for a channel
* \param channel The channel as a value in [0 , UDMA_CONF_MAX_CHANNEL]
* \return The channel's current mode
*
* The return value will be one of the UDMA_CHCTL_XFERMODE_xyz defines. This
* function is useful to determine whether a uDMA transfer has completed, in
* which case the return value will be UDMA_CHCTL_XFERMODE_STOP
*/
uint8_t udma_channel_get_mode(uint8_t channel);
/**
* \brief Calculate the value of the xfersize field in the control structure
* \param len The number of items to be transferred
* \return The value to be written to the control structure to achieve the
* desired transfer size
*
* If we want to transfer \e len items, we will normally do something like
* udma_set_channel_control_word(OTHER_FLAGS | udma_xfer_size(len))
*/
#define udma_xfer_size(len) ((len - 1) << 4)
#endif /* UDMA_H_ */
/**
* @}
* @}
*/
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