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- /*
- * Copyright (c) 2006-2023, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date Author Notes
- * 2019-07-15 Magicoe The first version for LPC55S6x
- */
- #include "rtdevice.h"
- #include "fsl_common.h"
- #include "fsl_iocon.h"
- #include "fsl_spi.h"
- #include "fsl_spi_dma.h"
- enum
- {
- #ifdef BSP_USING_SPI3
- SPI3_INDEX,
- #endif
- #ifdef BSP_USING_SPI8
- SPI8_INDEX,
- #endif
- };
- struct lpc_spi
- {
- struct rt_spi_bus parent;
- SPI_Type *SPIx;
- clock_attach_id_t clock_attach_id;
- clock_ip_name_t clock_name;
- DMA_Type *DMAx;
- uint8_t tx_dma_chl;
- uint8_t rx_dma_chl;
- dma_handle_t dma_tx_handle;
- dma_handle_t dma_rx_handle;
- spi_dma_handle_t spi_dma_handle;
- rt_sem_t sem;
- char *device_name;
- };
- static struct lpc_spi lpc_obj[] =
- {
- #ifdef BSP_USING_SPI3
- {
- .SPIx = SPI3,
- .clock_attach_id = kMAIN_CLK_to_FLEXCOMM3,
- .clock_name = kCLOCK_FlexComm3,
- .device_name = "spi3",
- .DMAx = DMA0,
- .tx_dma_chl = 9,
- .rx_dma_chl = 8,
- },
- #endif
- #ifdef BSP_USING_SPI8
- {
- .SPIx = SPI8,
- .clock_attach_id = kMAIN_CLK_to_HSLSPI,
- .clock_name = kCLOCK_Hs_Lspi,
- .device_name = "spi8",
- .DMAx = DMA0,
- .tx_dma_chl = 3,
- .rx_dma_chl = 2,
- },
- #endif
- };
- static uint32_t lpc_get_spi_freq(SPI_Type *base)
- {
- uint32_t freq = 0;
- if(base == SPI3)
- {
- freq = CLOCK_GetFlexCommClkFreq(kCLOCK_FlexComm3);
- }
- if(base == SPI8)
- {
- freq = CLOCK_GetFlexCommClkFreq(kCLOCK_Hs_Lspi);
- }
- return freq;
- }
- static rt_err_t lpc_spi_init(SPI_Type *base, struct rt_spi_configuration *cfg)
- {
- spi_master_config_t masterConfig = {0};
- SPI_MasterGetDefaultConfig(&masterConfig);
- if(cfg->data_width != 8 && cfg->data_width != 16)
- {
- cfg->data_width = 8;
- }
- masterConfig.baudRate_Bps = cfg->max_hz;
- if(cfg->data_width == 8)
- {
- masterConfig.dataWidth = kSPI_Data8Bits;
- }
- else if(cfg->data_width == 16)
- {
- masterConfig.dataWidth = kSPI_Data16Bits;
- }
- if(cfg->mode & RT_SPI_MSB)
- {
- masterConfig.direction = kSPI_MsbFirst;
- }
- else
- {
- masterConfig.direction = kSPI_LsbFirst;
- }
- if(cfg->mode & RT_SPI_CPHA)
- {
- masterConfig.phase = kSPI_ClockPhaseSecondEdge;
- }
- else
- {
- masterConfig.phase = kSPI_ClockPhaseFirstEdge;
- }
- if(cfg->mode & RT_SPI_CPOL)
- {
- masterConfig.polarity = kSPI_ClockPolarityActiveLow;
- }
- else
- {
- masterConfig.polarity = kSPI_ClockPolarityActiveHigh;
- }
- SPI_MasterInit(base, &masterConfig, lpc_get_spi_freq(base));
- return RT_EOK;
- }
- rt_err_t rt_hw_spi_device_attach(const char *bus_name, const char *device_name, rt_base_t cs_pin)
- {
- rt_err_t ret = RT_EOK;
- struct rt_spi_device *spi_device = (struct rt_spi_device *)rt_malloc(sizeof(struct rt_spi_device));
- ret = rt_spi_bus_attach_device_cspin(spi_device, device_name, bus_name, cs_pin, RT_NULL);
- return ret;
- }
- static rt_err_t spi_configure(struct rt_spi_device *device, struct rt_spi_configuration *cfg)
- {
- rt_err_t ret = RT_EOK;
- struct lpc_spi *spi = rt_container_of(device->bus, struct lpc_spi, parent);
- ret = lpc_spi_init(spi->SPIx, cfg);
- return ret;
- }
- static void SPI_MasterUserCallback(SPI_Type *base, spi_dma_handle_t *handle, status_t status, void *userData)
- {
- struct lpc_spi *spi = (struct lpc_spi*)userData;
- rt_sem_release(spi->sem);
- }
- static rt_ssize_t spixfer(struct rt_spi_device *device, struct rt_spi_message *message)
- {
- int i;
- spi_transfer_t transfer = {0};
- RT_ASSERT(device != RT_NULL);
- RT_ASSERT(device->bus != RT_NULL);
- struct lpc_spi *spi = rt_container_of(device->bus, struct lpc_spi, parent);
- if(message->cs_take && (device->cs_pin != PIN_NONE))
- {
- rt_pin_write(device->cs_pin, PIN_LOW);
- }
- transfer.dataSize = message->length;
- transfer.rxData = (uint8_t *)(message->recv_buf);
- transfer.txData = (uint8_t *)(message->send_buf);
- transfer.configFlags = kSPI_FrameAssert;
- // if(message->length < MAX_DMA_TRANSFER_SIZE)
- if(0)
- {
- SPI_MasterTransferBlocking(spi->SPIx, &transfer);
- }
- else
- {
- uint32_t block, remain;
- block = message->length / DMA_MAX_TRANSFER_COUNT;
- remain = message->length % DMA_MAX_TRANSFER_COUNT;
- for(i=0; i<block; i++)
- {
- transfer.dataSize = DMA_MAX_TRANSFER_COUNT;
- if(message->recv_buf) transfer.rxData = (uint8_t *)(message->recv_buf + i*DMA_MAX_TRANSFER_COUNT);
- if(message->send_buf) transfer.txData = (uint8_t *)(message->send_buf + i*DMA_MAX_TRANSFER_COUNT);
- SPI_MasterTransferDMA(spi->SPIx, &spi->spi_dma_handle, &transfer);
- rt_sem_take(spi->sem, RT_WAITING_FOREVER);
- }
- if(remain)
- {
- transfer.dataSize = remain;
- if(message->recv_buf) transfer.rxData = (uint8_t *)(message->recv_buf + i*DMA_MAX_TRANSFER_COUNT);
- if(message->send_buf) transfer.txData = (uint8_t *)(message->send_buf + i*DMA_MAX_TRANSFER_COUNT);
- SPI_MasterTransferDMA(spi->SPIx, &spi->spi_dma_handle, &transfer);
- rt_sem_take(spi->sem, RT_WAITING_FOREVER);
- }
- }
- if(message->cs_release && (device->cs_pin != PIN_NONE))
- {
- rt_pin_write(device->cs_pin, PIN_HIGH);
- }
- return message->length;
- }
- static struct rt_spi_ops lpc_spi_ops =
- {
- .configure = spi_configure,
- .xfer = spixfer
- };
- int rt_hw_spi_init(void)
- {
- int i;
- for(i=0; i<ARRAY_SIZE(lpc_obj); i++)
- {
- CLOCK_AttachClk(lpc_obj[i].clock_attach_id);
- lpc_obj[i].parent.parent.user_data = &lpc_obj[i];
- lpc_obj[i].sem = rt_sem_create("sem_spi", 0, RT_IPC_FLAG_FIFO);
- DMA_EnableChannel(lpc_obj[i].DMAx, lpc_obj[i].tx_dma_chl);
- DMA_EnableChannel(lpc_obj[i].DMAx, lpc_obj[i].rx_dma_chl);
- DMA_SetChannelPriority(lpc_obj[i].DMAx, lpc_obj[i].tx_dma_chl, kDMA_ChannelPriority3);
- DMA_SetChannelPriority(lpc_obj[i].DMAx, lpc_obj[i].rx_dma_chl, kDMA_ChannelPriority2);
- DMA_CreateHandle(&lpc_obj[i].dma_tx_handle, lpc_obj[i].DMAx, lpc_obj[i].tx_dma_chl);
- DMA_CreateHandle(&lpc_obj[i].dma_rx_handle, lpc_obj[i].DMAx, lpc_obj[i].rx_dma_chl);
- SPI_MasterTransferCreateHandleDMA(lpc_obj[i].SPIx, &lpc_obj[i].spi_dma_handle, SPI_MasterUserCallback, &lpc_obj[i], &lpc_obj[i].dma_tx_handle, &lpc_obj[i].dma_rx_handle);
- rt_spi_bus_register(&lpc_obj[i].parent, lpc_obj[i].device_name, &lpc_spi_ops);
- }
- return RT_EOK;
- }
- INIT_DEVICE_EXPORT(rt_hw_spi_init);
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