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Diffstat (limited to 'watch-library/hal/include/hpl_dma.h')
| -rw-r--r-- | watch-library/hal/include/hpl_dma.h | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/watch-library/hal/include/hpl_dma.h b/watch-library/hal/include/hpl_dma.h new file mode 100644 index 00000000..1e08434a --- /dev/null +++ b/watch-library/hal/include/hpl_dma.h @@ -0,0 +1,176 @@ +/** + * \file + * + * \brief DMA related functionality declaration. + * + * Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries. + * + * \asf_license_start + * + * \page License + * + * Subject to your compliance with these terms, you may use Microchip + * software and any derivatives exclusively with Microchip products. + * It is your responsibility to comply with third party license terms applicable + * to your use of third party software (including open source software) that + * may accompany Microchip software. + * + * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, + * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, + * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, + * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE + * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL + * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE + * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE + * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT + * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY + * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY, + * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE. + * + * \asf_license_stop + * + */ + +#ifndef _HPL_DMA_H_INCLUDED +#define _HPL_DMA_H_INCLUDED + +/** + * \addtogroup HPL DMA + * + * \section hpl_dma_rev Revision History + * - v1.0.0 Initial Release + * + *@{ + */ + +#include <compiler.h> +#include <hpl_irq.h> + +#ifdef __cplusplus +extern "C" { +#endif + +struct _dma_resource; + +/** + * \brief DMA callback types + */ +enum _dma_callback_type { DMA_TRANSFER_COMPLETE_CB, DMA_TRANSFER_ERROR_CB }; + +/** + * \brief DMA interrupt callbacks + */ +struct _dma_callbacks { + void (*transfer_done)(struct _dma_resource *resource); + void (*error)(struct _dma_resource *resource); +}; + +/** + * \brief DMA resource structure + */ +struct _dma_resource { + struct _dma_callbacks dma_cb; + void * back; +}; + +/** + * \brief Initialize DMA + * + * This function does low level DMA configuration. + * + * \return initialize status + */ +int32_t _dma_init(void); + +/** + * \brief Set destination address + * + * \param[in] channel DMA channel to set destination address for + * \param[in] dst Destination address + * + * \return setting status + */ +int32_t _dma_set_destination_address(const uint8_t channel, const void *const dst); + +/** + * \brief Set source address + * + * \param[in] channel DMA channel to set source address for + * \param[in] src Source address + * + * \return setting status + */ +int32_t _dma_set_source_address(const uint8_t channel, const void *const src); + +/** + * \brief Set next descriptor address + * + * \param[in] current_channel Current DMA channel to set next descriptor address + * \param[in] next_channel Next DMA channel used as next descriptor + * + * \return setting status + */ +int32_t _dma_set_next_descriptor(const uint8_t current_channel, const uint8_t next_channel); + +/** + * \brief Enable/disable source address incrementation during DMA transaction + * + * \param[in] channel DMA channel to set source address for + * \param[in] enable True to enable, false to disable + * + * \return status of operation + */ +int32_t _dma_srcinc_enable(const uint8_t channel, const bool enable); + +/** + * \brief Enable/disable Destination address incrementation during DMA transaction + * + * \param[in] channel DMA channel to set destination address for + * \param[in] enable True to enable, false to disable + * + * \return status of operation + */ +int32_t _dma_dstinc_enable(const uint8_t channel, const bool enable); +/** + * \brief Set the amount of data to be transfered per transaction + * + * \param[in] channel DMA channel to set data amount for + * \param[in] amount Data amount + * + * \return status of operation + */ +int32_t _dma_set_data_amount(const uint8_t channel, const uint32_t amount); + +/** + * \brief Trigger DMA transaction on the given channel + * + * \param[in] channel DMA channel to trigger transaction on + * + * \return status of operation + */ +int32_t _dma_enable_transaction(const uint8_t channel, const bool software_trigger); + +/** + * \brief Retrieves DMA resource structure + * + * \param[out] resource The resource to be retrieved + * \param[in] channel DMA channel to retrieve structure for + * + * \return status of operation + */ +int32_t _dma_get_channel_resource(struct _dma_resource **resource, const uint8_t channel); + +/** + * \brief Enable/disable DMA interrupt + * + * \param[in] channel DMA channel to enable/disable interrupt for + * \param[in] type The type of interrupt to disable/enable if applicable + * \param[in] state Enable or disable + */ +void _dma_set_irq_state(const uint8_t channel, const enum _dma_callback_type type, const bool state); + +#ifdef __cplusplus +} +#endif + +#endif /* HPL_DMA_H_INCLUDED */ |