/** * \file * * \brief Generic DMAC related functionality. * * Copyright (c) 2016-2019 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 * */ #include #include #include #include #include #include #if CONF_DMAC_ENABLE /* Section containing first descriptors for all DMAC channels */ COMPILER_ALIGNED(16) DmacDescriptor _descriptor_section[DMAC_CH_NUM] SECTION_DMAC_DESCRIPTOR; /* Section containing current descriptors for all DMAC channels */ COMPILER_ALIGNED(16) DmacDescriptor _write_back_section[DMAC_CH_NUM] SECTION_DMAC_DESCRIPTOR; /* Array containing callbacks for DMAC channels */ static struct _dma_resource _resources[DMAC_CH_NUM]; /* This macro DMAC configuration */ #define DMAC_CHANNEL_CFG(i, n) \ {(CONF_DMAC_ENABLE_##n << DMAC_CHCTRLA_ENABLE_Pos), \ DMAC_CHCTRLB_TRIGACT(CONF_DMAC_TRIGACT_##n) | DMAC_CHCTRLB_TRIGSRC(CONF_DMAC_TRIGSRC_##n) \ | DMAC_CHCTRLB_LVL(CONF_DMAC_LVL_##n) | (CONF_DMAC_EVOE_##n << DMAC_CHCTRLB_EVOE_Pos) \ | (CONF_DMAC_EVIE_##n << DMAC_CHCTRLB_EVIE_Pos) | DMAC_CHCTRLB_EVACT(CONF_DMAC_EVACT_##n), \ DMAC_BTCTRL_STEPSIZE(CONF_DMAC_STEPSIZE_##n) | (CONF_DMAC_STEPSEL_##n << DMAC_BTCTRL_STEPSEL_Pos) \ | (CONF_DMAC_DSTINC_##n << DMAC_BTCTRL_DSTINC_Pos) | (CONF_DMAC_SRCINC_##n << DMAC_BTCTRL_SRCINC_Pos) \ | DMAC_BTCTRL_BEATSIZE(CONF_DMAC_BEATSIZE_##n) | DMAC_BTCTRL_BLOCKACT(CONF_DMAC_BLOCKACT_##n) \ | DMAC_BTCTRL_EVOSEL(CONF_DMAC_EVOSEL_##n)}, /* DMAC channel configuration */ struct dmac_channel_cfg { uint8_t ctrla; uint32_t ctrlb; uint16_t btctrl; }; /* DMAC channel configurations */ const static struct dmac_channel_cfg _cfgs[] = {REPEAT_MACRO(DMAC_CHANNEL_CFG, i, DMAC_CH_NUM)}; /** * \brief Initialize DMAC */ int32_t _dma_init(void) { uint8_t i = 0; hri_dmac_clear_CTRL_DMAENABLE_bit(DMAC); hri_dmac_clear_CTRL_CRCENABLE_bit(DMAC); hri_dmac_set_CHCTRLA_SWRST_bit(DMAC); hri_dmac_write_CTRL_reg(DMAC, (CONF_DMAC_LVLEN0 << DMAC_CTRL_LVLEN0_Pos) | (CONF_DMAC_LVLEN1 << DMAC_CTRL_LVLEN1_Pos) | (CONF_DMAC_LVLEN2 << DMAC_CTRL_LVLEN2_Pos) | (CONF_DMAC_LVLEN3 << DMAC_CTRL_LVLEN3_Pos)); hri_dmac_write_DBGCTRL_DBGRUN_bit(DMAC, CONF_DMAC_DBGRUN); hri_dmac_write_PRICTRL0_reg( DMAC, DMAC_PRICTRL0_LVLPRI0(CONF_DMAC_LVLPRI0) | DMAC_PRICTRL0_LVLPRI1(CONF_DMAC_LVLPRI1) | DMAC_PRICTRL0_LVLPRI2(CONF_DMAC_LVLPRI2) | DMAC_PRICTRL0_LVLPRI3(CONF_DMAC_LVLPRI3) | (CONF_DMAC_RRLVLEN0 << DMAC_PRICTRL0_RRLVLEN0_Pos) | (CONF_DMAC_RRLVLEN1 << DMAC_PRICTRL0_RRLVLEN1_Pos) | (CONF_DMAC_RRLVLEN2 << DMAC_PRICTRL0_RRLVLEN2_Pos) | (CONF_DMAC_RRLVLEN3 << DMAC_PRICTRL0_RRLVLEN3_Pos)); hri_dmac_write_BASEADDR_reg(DMAC, (uint32_t)_descriptor_section); hri_dmac_write_WRBADDR_reg(DMAC, (uint32_t)_write_back_section); for (; i < DMAC_CH_NUM; i++) { hri_dmac_write_CHID_reg(DMAC, i); hri_dmac_write_CHCTRLB_reg(DMAC, _cfgs[i].ctrlb); hri_dmacdescriptor_write_BTCTRL_reg(&_descriptor_section[i], _cfgs[i].btctrl); hri_dmacdescriptor_write_DESCADDR_reg(&_descriptor_section[i], 0x0); } NVIC_DisableIRQ(DMAC_IRQn); NVIC_ClearPendingIRQ(DMAC_IRQn); NVIC_EnableIRQ(DMAC_IRQn); hri_dmac_set_CTRL_DMAENABLE_bit(DMAC); return ERR_NONE; } /** * \brief Enable/disable DMA interrupt */ void _dma_set_irq_state(const uint8_t channel, const enum _dma_callback_type type, const bool state) { hri_dmac_write_CHID_reg(DMAC, channel); if (DMA_TRANSFER_COMPLETE_CB == type) { hri_dmac_write_CHINTEN_TCMPL_bit(DMAC, state); } else if (DMA_TRANSFER_ERROR_CB == type) { hri_dmac_write_CHINTEN_TERR_bit(DMAC, state); } } int32_t _dma_set_destination_address(const uint8_t channel, const void *const dst) { hri_dmacdescriptor_write_DSTADDR_reg(&_descriptor_section[channel], (uint32_t)dst); return ERR_NONE; } int32_t _dma_set_source_address(const uint8_t channel, const void *const src) { hri_dmacdescriptor_write_SRCADDR_reg(&_descriptor_section[channel], (uint32_t)src); return ERR_NONE; } int32_t _dma_set_next_descriptor(const uint8_t current_channel, const uint8_t next_channel) { hri_dmacdescriptor_write_DESCADDR_reg(&_descriptor_section[current_channel], (uint32_t)&_descriptor_section[next_channel]); return ERR_NONE; } int32_t _dma_srcinc_enable(const uint8_t channel, const bool enable) { hri_dmacdescriptor_write_BTCTRL_SRCINC_bit(&_descriptor_section[channel], enable); return ERR_NONE; } int32_t _dma_set_data_amount(const uint8_t channel, const uint32_t amount) { uint32_t address = hri_dmacdescriptor_read_DSTADDR_reg(&_descriptor_section[channel]); uint8_t beat_size = hri_dmacdescriptor_read_BTCTRL_BEATSIZE_bf(&_descriptor_section[channel]); if (hri_dmacdescriptor_get_BTCTRL_DSTINC_bit(&_descriptor_section[channel])) { hri_dmacdescriptor_write_DSTADDR_reg(&_descriptor_section[channel], address + amount * (1 << beat_size)); } address = hri_dmacdescriptor_read_SRCADDR_reg(&_descriptor_section[channel]); if (hri_dmacdescriptor_get_BTCTRL_SRCINC_bit(&_descriptor_section[channel])) { hri_dmacdescriptor_write_SRCADDR_reg(&_descriptor_section[channel], address + amount * (1 << beat_size)); } hri_dmacdescriptor_write_BTCNT_reg(&_descriptor_section[channel], amount); return ERR_NONE; } int32_t _dma_enable_transaction(const uint8_t channel, const bool software_trigger) { hri_dmac_write_CHID_reg(DMAC, channel); hri_dmacdescriptor_set_BTCTRL_VALID_bit(&_descriptor_section[channel]); hri_dmac_set_CHCTRLA_ENABLE_bit(DMAC); if (software_trigger) { hri_dmac_set_SWTRIGCTRL_reg(DMAC, 1 << channel); } return ERR_NONE; } int32_t _dma_get_channel_resource(struct _dma_resource **resource, const uint8_t channel) { *resource = &_resources[channel]; return ERR_NONE; } int32_t _dma_dstinc_enable(const uint8_t channel, const bool enable) { hri_dmacdescriptor_write_BTCTRL_DSTINC_bit(&_descriptor_section[channel], enable); return ERR_NONE; } /** * \internal DMAC interrupt handler */ static inline void _dmac_handler(void) { uint8_t channel = hri_dmac_read_INTPEND_ID_bf(DMAC); uint8_t current_channel = hri_dmac_read_CHID_reg(DMAC); uint8_t flag_status; struct _dma_resource *tmp_resource = &_resources[channel]; hri_dmac_write_CHID_reg(DMAC, channel); flag_status = hri_dmac_get_CHINTFLAG_reg(DMAC, DMAC_CHINTFLAG_MASK); hri_dmac_write_CHID_reg(DMAC, current_channel); if (flag_status & DMAC_CHINTFLAG_TERR) { hri_dmac_clear_CHINTFLAG_TERR_bit(DMAC); tmp_resource->dma_cb.error(tmp_resource); } else if (flag_status & DMAC_CHINTFLAG_TCMPL) { hri_dmac_clear_CHINTFLAG_TCMPL_bit(DMAC); tmp_resource->dma_cb.transfer_done(tmp_resource); } } /** * \brief DMAC interrupt handler */ void DMAC_Handler(void) { _dmac_handler(); } #endif /* CONF_DMAC_ENABLE */