rt1052 spi flash 读数据好慢

silly

直接用例程代码试了下 读取速度慢

touchzou

qspi 读取速度很快的，贴一部分代码:
flexspi_device_config_t deviceconfig = {
    .flexspiRootClk = 120000000,
    .flashSize = FLASH_SIZE,
    .CSIntervalUnit = kFLEXSPI_CsIntervalUnit1SckCycle,
    .CSInterval = 2,
    .CSHoldTime = 3,
    .CSSetupTime = 3,
    .dataValidTime = 0,
    .columnspace = 0,
    .enableWordAddress = 0,
    .AWRSeqIndex = 0,
    .AWRSeqNumber = 0,
    .ARDSeqIndex = NOR_CMD_LUT_SEQ_IDX_READ_FAST_QUAD,
    .ARDSeqNumber = 1,
    .AHBWriteWaitUnit = kFLEXSPI_AhbWriteWaitUnit2AhbCycle,
    .AHBWriteWaitInterval = 0,
};

const uint32_t customLUT[CUSTOM_LUT_LENGTH] = {
                                /* Normal read mode -SDR */
        [4 * NOR_CMD_LUT_SEQ_IDX_READ_NORMAL] =
            FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x03, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_1PAD, 0x18),
        [4 * NOR_CMD_LUT_SEQ_IDX_READ_NORMAL + 1] =
            FLEXSPI_LUT_SEQ(kFLEXSPI_Command_READ_SDR, kFLEXSPI_1PAD, 0x04, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),

        /* Fast read mode - SDR */
        [4 * NOR_CMD_LUT_SEQ_IDX_READ_FAST] =
            FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x0B, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_1PAD, 0x18),
        [4 * NOR_CMD_LUT_SEQ_IDX_READ_FAST + 1] = FLEXSPI_LUT_SEQ(
            kFLEXSPI_Command_DUMMY_SDR, kFLEXSPI_1PAD, 0x08, kFLEXSPI_Command_READ_SDR, kFLEXSPI_1PAD, 0x04),

        /* Fast read quad mode - SDR */
        [4 * NOR_CMD_LUT_SEQ_IDX_READ_FAST_QUAD] =
            FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x6B, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_1PAD, 0x18),
        [4 * NOR_CMD_LUT_SEQ_IDX_READ_FAST_QUAD + 1] = FLEXSPI_LUT_SEQ(
            kFLEXSPI_Command_DUMMY_SDR, kFLEXSPI_4PAD, 0x08, kFLEXSPI_Command_READ_SDR, kFLEXSPI_4PAD, 0x04),

        /* Read extend parameters */
        [4 * NOR_CMD_LUT_SEQ_IDX_READ_EA_STATUS] =
            FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0xC8, kFLEXSPI_Command_READ_SDR, kFLEXSPI_1PAD, 0x04),

        /* Write Enable */
        [4 * NOR_CMD_LUT_SEQ_IDX_WRITEENABLE] =
            FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x06, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),

        /* Erase Sector  */
        [4 * NOR_CMD_LUT_SEQ_IDX_ERASESECTOR] =
            FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x20, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_1PAD, 0x18),

        /* Page Program - single mode */
        [4 * NOR_CMD_LUT_SEQ_IDX_PAGEPROGRAM_SINGLE] =
            FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x02, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_1PAD, 0x18),
        [4 * NOR_CMD_LUT_SEQ_IDX_PAGEPROGRAM_SINGLE + 1] =
            FLEXSPI_LUT_SEQ(kFLEXSPI_Command_WRITE_SDR, kFLEXSPI_1PAD, 0x04, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),

        /* Page Program - quad mode */
        [4 * NOR_CMD_LUT_SEQ_IDX_PAGEPROGRAM_QUAD] =
            FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x32, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_1PAD, 0x18),
        [4 * NOR_CMD_LUT_SEQ_IDX_PAGEPROGRAM_QUAD + 1] =
            FLEXSPI_LUT_SEQ(kFLEXSPI_Command_WRITE_SDR, kFLEXSPI_4PAD, 0x04, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),

        /* Read ID */
        [4 * NOR_CMD_LUT_SEQ_IDX_READID] =
            FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0xAB, kFLEXSPI_Command_DUMMY_SDR, kFLEXSPI_1PAD, 0x18),
        [4 * NOR_CMD_LUT_SEQ_IDX_READID + 1] =
            FLEXSPI_LUT_SEQ(kFLEXSPI_Command_READ_SDR, kFLEXSPI_1PAD, 0x04, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),

        /* Write status-1 register */
        [4 * NOR_CMD_LUT_SEQ_IDX_WRITESTATUSREG] =
            FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x01, kFLEXSPI_Command_WRITE_SDR, kFLEXSPI_1PAD, 0x04),

        /* Enter QPI mode */
        [4 * NOR_CMD_LUT_SEQ_IDX_ENTERQPI] =
            FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x35, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),

        /* Exit QPI mode */
        [4 * NOR_CMD_LUT_SEQ_IDX_EXITQPI] =
            FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_4PAD, 0xF5, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),

        /* Read status register */
        [4 * NOR_CMD_LUT_SEQ_IDX_READSTATUSREG] =
            FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x05, kFLEXSPI_Command_READ_SDR, kFLEXSPI_1PAD, 0x04),
                                                
                                /* Write EA status register */
        [4 * NOR_CMD_LUT_SEQ_IDX_WRITE_EA_STATUS] =
            FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0xC5, kFLEXSPI_Command_WRITE_SDR, kFLEXSPI_1PAD, 0x04),
                                /* Write Enable for volatile register */
        [4 * NOR_CMD_LUT_SEQ_IDX_WRITE_ENABLE_VOLATILE] =
            FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x50, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),
                                [4 * NOR_CMD_LUT_SEQ_IDX_ENTER_FOUR_BYTE_MODE] =
                                                FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x35, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),
};


void qspi_init(void)
{
                flexspi_config_t config;
    status_t status;
    uint8_t vendorID = 0;
                //uint32_t i;
//                const clock_usb_pll_config_t g_ccmConfigUsbPll = {.loopDivider = 0U};

////    CLOCK_InitUsb1Pll(&g_ccmConfigUsbPll);
////    CLOCK_InitUsb1Pfd(kCLOCK_Pfd0, 24);   /* Set PLL3 PFD0 clock 360MHZ. */
//    CLOCK_SetMux(kCLOCK_FlexspiMux, 0x3); /* Choose PLL3 PFD0 clock as flexspi source clock. */
//    CLOCK_SetDiv(kCLOCK_FlexspiDiv, 2);   /* flexspi clock 120M. */
//    SCB_DisableDCache();
        
         rt_kprintf("\r\nQSPI Periphral Inited!\r\n");

    /*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;
    FLEXSPI_Init(EXAMPLE_FLEXSPI, &config);

    /* Configure flash settings according to serial flash feature. */
    FLEXSPI_SetFlashConfig(EXAMPLE_FLEXSPI, &deviceconfig, kFLEXSPI_PortA1);

    /* Update LUT table. */
    FLEXSPI_UpdateLUT(EXAMPLE_FLEXSPI, 0, customLUT, CUSTOM_LUT_LENGTH);

    /* Get vendor ID. */
    status = flexspi_nor_get_vendor_id(EXAMPLE_FLEXSPI, &vendorID);
    if (status != kStatus_Success)
    {
        //return status;
    }
    rt_kprintf("Vendor ID: 0x%x\r\n", vendorID);

               
               


}

status_t flexspi_nor_read_data(FLEXSPI_Type *base, uint32_t baseAddr, uint8_t *buff, uint16_t size)
{

    flexspi_transfer_t flashXfer;
                status_t status;

       

                memset(buff, 0x00, size);
    flashXfer.deviceAddress = baseAddr;
    flashXfer.port = kFLEXSPI_PortA1;
    flashXfer.cmdType = kFLEXSPI_Read;
    flashXfer.SeqNumber = 1;
    flashXfer.seqIndex = NOR_CMD_LUT_SEQ_IDX_READ_FAST_QUAD;
    flashXfer.data = (uint32_t *)buff;
    flashXfer.dataSize = size;

               
   status = FLEXSPI_TransferBlocking(base, &flashXfer);
                if (status != kStatus_Success)
    {
        return status;
    }

    status = flexspi_nor_wait_bus_busy(base);

    return status;
}

silly

将u16改成u32数据 我打印出来 正常 测试读数据 大约1MB 3秒   (什么鬼=_=会不会我的测速代码有问题 就把测速去掉 用源代码的读取1MB数据  然后用逻辑分析仪抓时钟20ns 那么8个时钟20ns*8=160 然后130ns恢复高电平  高电平保持2.85us开始下一个字节  一个字节3us   1024*1024*3us = 3秒)

silly

换成寄存器版本的flash大约是2mb/秒 还是有点慢

wendell.li

touchzou 发表于 2018-9-29 17:05
qspi 读取速度很快的，贴一部分代码:
flexspi_device_config_t deviceconfig = {
    .flexspiRootClk =  ...

楼主，我一执行这个FLEXSPI_SetFlashConfig 函数就重启，请问有啥要注意的吗 ？