/* * Copyright (c) 2006-2018, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2018-07-05 ZYH the first version */ #include #define PRINTF rt_kprintf #include "board.h" #include #include "drv_flexspi.h" #define DBG_ENABLE #define DBG_SECTION_NAME "[Hyper]" #define DBG_LEVEL DBG_LOG #define DBG_COLOR #include #define FLEXSPI_CLOCK kCLOCK_FlexSpi #define HYPERFLASH_CMD_LUT_SEQ_IDX_READDATA 0 #define HYPERFLASH_CMD_LUT_SEQ_IDX_WRITEDATA 1 #define HYPERFLASH_CMD_LUT_SEQ_IDX_READSTATUS 2 #define HYPERFLASH_CMD_LUT_SEQ_IDX_WRITEENABLE 4 #define HYPERFLASH_CMD_LUT_SEQ_IDX_ERASESECTOR 6 #define HYPERFLASH_CMD_LUT_SEQ_IDX_PAGEPROGRAM 10 #define CUSTOM_LUT_LENGTH 48 static flexspi_device_config_t deviceconfig = { .flexspiRootClk = 42000000, /* 42MHZ SPI serial clock */ .isSck2Enabled = false, .flashSize = FLASH_SIZE, .CSIntervalUnit = kFLEXSPI_CsIntervalUnit1SckCycle, .CSInterval = 2, .CSHoldTime = 0, .CSSetupTime = 3, .dataValidTime = 1, .columnspace = 3, .enableWordAddress = true, .AWRSeqIndex = HYPERFLASH_CMD_LUT_SEQ_IDX_WRITEDATA, .AWRSeqNumber = 1, .ARDSeqIndex = HYPERFLASH_CMD_LUT_SEQ_IDX_READDATA, .ARDSeqNumber = 1, .AHBWriteWaitUnit = kFLEXSPI_AhbWriteWaitUnit2AhbCycle, .AHBWriteWaitInterval = 20, }; static uint32_t customLUT[CUSTOM_LUT_LENGTH] = { /* Read Data */ [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_READDATA] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0xA0, kFLEXSPI_Command_RADDR_DDR, kFLEXSPI_8PAD, 0x18), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_READDATA + 1] = FLEXSPI_LUT_SEQ( kFLEXSPI_Command_CADDR_DDR, kFLEXSPI_8PAD, 0x10, kFLEXSPI_Command_READ_DDR, kFLEXSPI_8PAD, 0x04), /* Write Data */ [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_WRITEDATA] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x20, kFLEXSPI_Command_RADDR_DDR, kFLEXSPI_8PAD, 0x18), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_WRITEDATA + 1] = FLEXSPI_LUT_SEQ( kFLEXSPI_Command_CADDR_DDR, kFLEXSPI_8PAD, 0x10, kFLEXSPI_Command_WRITE_DDR, kFLEXSPI_8PAD, 0x02), /* Read Status */ [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_READSTATUS] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_READSTATUS + 1] = FLEXSPI_LUT_SEQ( kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0xAA), // ADDR 0x555 [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_READSTATUS + 2] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x05), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_READSTATUS + 3] = FLEXSPI_LUT_SEQ( kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x70), // DATA 0x70 [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_READSTATUS + 4] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0xA0, kFLEXSPI_Command_RADDR_DDR, kFLEXSPI_8PAD, 0x18), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_READSTATUS + 5] = FLEXSPI_LUT_SEQ( kFLEXSPI_Command_CADDR_DDR, kFLEXSPI_8PAD, 0x10, kFLEXSPI_Command_DUMMY_RWDS_DDR, kFLEXSPI_8PAD, 0x0B), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_READSTATUS + 6] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_READ_DDR, kFLEXSPI_8PAD, 0x04, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0x0), /* Write Enable */ [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_WRITEENABLE] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_WRITEENABLE + 1] = FLEXSPI_LUT_SEQ( kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0xAA), // ADDR 0x555 [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_WRITEENABLE + 2] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x05), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_WRITEENABLE + 3] = FLEXSPI_LUT_SEQ( kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0xAA), // DATA 0xAA [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_WRITEENABLE + 4] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_WRITEENABLE + 5] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x55), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_WRITEENABLE + 6] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x02), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_WRITEENABLE + 7] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x55), /* Erase Sector */ [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_ERASESECTOR] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_ERASESECTOR + 1] = FLEXSPI_LUT_SEQ( kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0xAA), // ADDR 0x555 [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_ERASESECTOR + 2] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x05), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_ERASESECTOR + 3] = FLEXSPI_LUT_SEQ( kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x80), // DATA 0x80 [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_ERASESECTOR + 4] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_ERASESECTOR + 5] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0xAA), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_ERASESECTOR + 6] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x05), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_ERASESECTOR + 7] = FLEXSPI_LUT_SEQ( kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0xAA), // ADDR 0x555 [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_ERASESECTOR + 8] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_ERASESECTOR + 9] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x55), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_ERASESECTOR + 10] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x02), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_ERASESECTOR + 11] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x55), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_ERASESECTOR + 12] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_RADDR_DDR, kFLEXSPI_8PAD, 0x18), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_ERASESECTOR + 13] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_CADDR_DDR, kFLEXSPI_8PAD, 0x10, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_ERASESECTOR + 14] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x30, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0x00), /* program page */ [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_PAGEPROGRAM] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_PAGEPROGRAM + 1] = FLEXSPI_LUT_SEQ( kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0xAA), // ADDR 0x555 [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_PAGEPROGRAM + 2] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x05), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_PAGEPROGRAM + 3] = FLEXSPI_LUT_SEQ( kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0xA0), // DATA 0xA0 [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_PAGEPROGRAM + 4] = FLEXSPI_LUT_SEQ(kFLEXSPI_Command_DDR, kFLEXSPI_8PAD, 0x00, kFLEXSPI_Command_RADDR_DDR, kFLEXSPI_8PAD, 0x18), [4 * HYPERFLASH_CMD_LUT_SEQ_IDX_PAGEPROGRAM + 5] = FLEXSPI_LUT_SEQ( kFLEXSPI_Command_CADDR_DDR, kFLEXSPI_8PAD, 0x10, kFLEXSPI_Command_WRITE_DDR, kFLEXSPI_8PAD, 0x80), }; SECTION("itcm") status_t flexspi_nor_hyperbus_read(FLEXSPI_Type *base, uint32_t addr, uint32_t *buffer, uint32_t bytes) { flexspi_transfer_t flashXfer; status_t status; flashXfer.deviceAddress = addr * 2; flashXfer.port = kFLEXSPI_PortA1; flashXfer.cmdType = kFLEXSPI_Read; flashXfer.SeqNumber = 1; flashXfer.seqIndex = HYPERFLASH_CMD_LUT_SEQ_IDX_READDATA; flashXfer.data = buffer; flashXfer.dataSize = bytes; status = FLEXSPI_TransferBlocking(base, &flashXfer); if (status != kStatus_Success) { return status; } return status; } SECTION("itcm") status_t flexspi_nor_hyperbus_write(FLEXSPI_Type *base, uint32_t addr, uint32_t *buffer, uint32_t bytes) { flexspi_transfer_t flashXfer; status_t status; flashXfer.deviceAddress = addr * 2; flashXfer.port = kFLEXSPI_PortA1; flashXfer.cmdType = kFLEXSPI_Write; flashXfer.SeqNumber = 1; flashXfer.seqIndex = HYPERFLASH_CMD_LUT_SEQ_IDX_WRITEDATA; flashXfer.data = buffer; flashXfer.dataSize = bytes; status = FLEXSPI_TransferBlocking(base, &flashXfer); if (status != kStatus_Success) { return status; } return status; } SECTION("itcm") status_t flexspi_nor_write_enable(FLEXSPI_Type *base, uint32_t baseAddr) { flexspi_transfer_t flashXfer; status_t status; /* Write neable */ flashXfer.deviceAddress = baseAddr; flashXfer.port = kFLEXSPI_PortA1; flashXfer.cmdType = kFLEXSPI_Command; flashXfer.SeqNumber = 2; flashXfer.seqIndex = HYPERFLASH_CMD_LUT_SEQ_IDX_WRITEENABLE; status = FLEXSPI_TransferBlocking(base, &flashXfer); return status; } SECTION("itcm") status_t flexspi_nor_wait_bus_busy(FLEXSPI_Type *base) { /* Wait status ready. */ bool isBusy; uint32_t readValue; status_t status; flexspi_transfer_t flashXfer; flashXfer.deviceAddress = 0; flashXfer.port = kFLEXSPI_PortA1; flashXfer.cmdType = kFLEXSPI_Read; flashXfer.SeqNumber = 2; flashXfer.seqIndex = HYPERFLASH_CMD_LUT_SEQ_IDX_READSTATUS; flashXfer.data = &readValue; flashXfer.dataSize = 2; do { status = FLEXSPI_TransferBlocking(base, &flashXfer); if (status != kStatus_Success) { return status; } if (readValue & 0x8000) { isBusy = false; } else { isBusy = true; } if (readValue & 0x3200) { status = kStatus_Fail; break; } } while (isBusy); return status; } SECTION("itcm") status_t flexspi_nor_flash_erase_sector(FLEXSPI_Type *base, uint32_t address) { status_t status; flexspi_transfer_t flashXfer; rt_uint32_t level; level = rt_hw_interrupt_disable(); FLEXSPI_Enable(FLEXSPI, false); CLOCK_DisableClock(FLEXSPI_CLOCK); CLOCK_SetDiv(kCLOCK_FlexspiDiv, 3); /* flexspi clock 332M, DDR mode, internal clock 166M. */ CLOCK_EnableClock(FLEXSPI_CLOCK); FLEXSPI_Enable(FLEXSPI, true); /* Write enable */ status = flexspi_nor_write_enable(base, address); if (status != kStatus_Success) { FLEXSPI_Enable(FLEXSPI, false); CLOCK_DisableClock(FLEXSPI_CLOCK); CLOCK_SetDiv(kCLOCK_FlexspiDiv, 0); /* flexspi clock 332M, DDR mode, internal clock 166M. */ CLOCK_EnableClock(FLEXSPI_CLOCK); FLEXSPI_Enable(FLEXSPI, true); FLEXSPI_SoftwareReset(FLEXSPI); rt_hw_interrupt_enable(level); return status; } flashXfer.deviceAddress = address; flashXfer.port = kFLEXSPI_PortA1; flashXfer.cmdType = kFLEXSPI_Command; flashXfer.SeqNumber = 4; flashXfer.seqIndex = HYPERFLASH_CMD_LUT_SEQ_IDX_ERASESECTOR; status = FLEXSPI_TransferBlocking(base, &flashXfer); if (status != kStatus_Success) { FLEXSPI_Enable(FLEXSPI, false); CLOCK_DisableClock(FLEXSPI_CLOCK); CLOCK_SetDiv(kCLOCK_FlexspiDiv, 0); /* flexspi clock 332M, DDR mode, internal clock 166M. */ CLOCK_EnableClock(FLEXSPI_CLOCK); FLEXSPI_Enable(FLEXSPI, true); FLEXSPI_SoftwareReset(FLEXSPI); rt_hw_interrupt_enable(level); return status; } status = flexspi_nor_wait_bus_busy(base); rt_hw_cpu_dcache_ops(RT_HW_CACHE_INVALIDATE,(void *)(FLEXSPI_AMBA_BASE+address),FLEXSPI_NOR_SECTOR_SIZE); rt_hw_cpu_icache_ops(RT_HW_CACHE_INVALIDATE,(void *)(FLEXSPI_AMBA_BASE+address),FLEXSPI_NOR_SECTOR_SIZE); FLEXSPI_Enable(FLEXSPI, false); CLOCK_DisableClock(FLEXSPI_CLOCK); CLOCK_SetDiv(kCLOCK_FlexspiDiv, 0); /* flexspi clock 332M, DDR mode, internal clock 166M. */ CLOCK_EnableClock(FLEXSPI_CLOCK); FLEXSPI_Enable(FLEXSPI, true); FLEXSPI_SoftwareReset(FLEXSPI); rt_hw_interrupt_enable(level); return status; } SECTION("itcm") status_t flexspi_nor_flash_page_program(FLEXSPI_Type *base, uint32_t address, const uint32_t *src) { status_t status; flexspi_transfer_t flashXfer; rt_uint32_t level; level = rt_hw_interrupt_disable(); FLEXSPI_Enable(FLEXSPI, false); CLOCK_DisableClock(FLEXSPI_CLOCK); CLOCK_SetDiv(kCLOCK_FlexspiDiv, 3); /* flexspi clock 332M, DDR mode, internal clock 166M. */ CLOCK_EnableClock(FLEXSPI_CLOCK); FLEXSPI_Enable(FLEXSPI, true); /* Write neable */ status = flexspi_nor_write_enable(base, address); if (status != kStatus_Success) { rt_hw_interrupt_enable(level); return status; } /* Prepare page program command */ flashXfer.deviceAddress = address; flashXfer.port = kFLEXSPI_PortA1; flashXfer.cmdType = kFLEXSPI_Write; flashXfer.SeqNumber = 2; flashXfer.seqIndex = HYPERFLASH_CMD_LUT_SEQ_IDX_PAGEPROGRAM; flashXfer.data = (uint32_t *)src; flashXfer.dataSize = FLASH_PAGE_SIZE; status = FLEXSPI_TransferBlocking(base, &flashXfer); if (status != kStatus_Success) { rt_hw_interrupt_enable(level); return status; } status = flexspi_nor_wait_bus_busy(base); rt_hw_cpu_dcache_ops(RT_HW_CACHE_INVALIDATE,(void *)(FLEXSPI_AMBA_BASE+address),FLASH_PAGE_SIZE); rt_hw_cpu_icache_ops(RT_HW_CACHE_INVALIDATE,(void *)(FLEXSPI_AMBA_BASE+address),FLASH_PAGE_SIZE); FLEXSPI_Enable(FLEXSPI, false); CLOCK_DisableClock(FLEXSPI_CLOCK); CLOCK_SetDiv(kCLOCK_FlexspiDiv, 0); /* flexspi clock 332M, DDR mode, internal clock 166M. */ CLOCK_EnableClock(FLEXSPI_CLOCK); FLEXSPI_Enable(FLEXSPI, true); FLEXSPI_SoftwareReset(FLEXSPI); rt_hw_interrupt_enable(level); return status; } SECTION("itcm") status_t flexspi_nor_hyperflash_cfi(FLEXSPI_Type *base) { /* * Read ID-CFI Parameters */ // CFI Entry status_t status; uint32_t buffer[2]; uint32_t data = 0x9800; status = flexspi_nor_hyperbus_write(base, 0x555, &data, 2); if (status != kStatus_Success) { return status; } // ID-CFI Read // Read Query Unique ASCII String status = flexspi_nor_hyperbus_read(base, 0x10, &buffer[0], sizeof(buffer)); if (status != kStatus_Success) { return status; } buffer[1] &= 0xFFFF; // Check that the data read out is unicode "QRY" in big-endian order if ((buffer[0] != 0x52005100) || (buffer[1] != 0x5900)) { status = kStatus_Fail; return status; } // ASO Exit data = 0xF000; status = flexspi_nor_hyperbus_write(base, 0x0, &data, 2); if (status != kStatus_Success) { return status; } return status; } SECTION("itcm") int rt_hw_flexspi_init(void) { flexspi_config_t config; status_t status; rt_uint32_t level; level = rt_hw_interrupt_disable(); // Set flexspi root clock to 166MHZ. const clock_usb_pll_config_t g_ccmConfigUsbPll = {.loopDivider = 0U}; CLOCK_InitUsb1Pll(&g_ccmConfigUsbPll); CLOCK_InitUsb1Pfd(kCLOCK_Pfd0, 26); /* Set PLL3 PFD0 clock 332MHZ. */ CLOCK_SetMux(kCLOCK_FlexspiMux, 0x3); /* Choose PLL3 PFD0 clock as flexspi source clock. */ CLOCK_SetDiv(kCLOCK_FlexspiDiv, 3); /* flexspi clock 83M, DDR mode, internal clock 42M. */ /*Get FLEXSPI default settings and configure the flexspi. */ FLEXSPI_GetDefaultConfig(&config); /*Set AHB buffer size for reading data through AHB bus. */ config.ahbConfig.enableAHBPrefetch = true; /*Allow AHB read start address do not follow the alignment requirement. */ config.ahbConfig.enableReadAddressOpt = true; /* enable diff clock and DQS */ config.enableSckBDiffOpt = true; config.rxSampleClock = kFLEXSPI_ReadSampleClkExternalInputFromDqsPad; config.enableCombination = true; FLEXSPI_Init(FLEXSPI, &config); /* Configure flash settings according to serial flash feature. */ FLEXSPI_SetFlashConfig(FLEXSPI, &deviceconfig, kFLEXSPI_PortA1); /* Update LUT table. */ FLEXSPI_UpdateLUT(FLEXSPI, 0, customLUT, CUSTOM_LUT_LENGTH); /* Do software reset. */ FLEXSPI_SoftwareReset(FLEXSPI); status = flexspi_nor_hyperflash_cfi(FLEXSPI); /* Get vendor ID. */ if (status != kStatus_Success) { FLEXSPI_Enable(FLEXSPI, false); CLOCK_DisableClock(FLEXSPI_CLOCK); CLOCK_SetDiv(kCLOCK_FlexspiDiv, 0); /* flexspi clock 332M, DDR mode, internal clock 166M. */ CLOCK_EnableClock(FLEXSPI_CLOCK); FLEXSPI_Enable(FLEXSPI, true); FLEXSPI_SoftwareReset(FLEXSPI); rt_hw_interrupt_enable(level); return status; } FLEXSPI_Enable(FLEXSPI, false); CLOCK_DisableClock(FLEXSPI_CLOCK); CLOCK_SetDiv(kCLOCK_FlexspiDiv, 0); /* flexspi clock 332M, DDR mode, internal clock 166M. */ CLOCK_EnableClock(FLEXSPI_CLOCK); FLEXSPI_Enable(FLEXSPI, true); FLEXSPI_SoftwareReset(FLEXSPI); rt_hw_interrupt_enable(level); return 0; }