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;
}
int flexspi_nor_init(void)
{
uint32_t i = 0;
flexspi_config_t config;
status_t status;
#ifdef XIP_EXTERNAL_FLASH
return 0;
#endif
// Set flexspi root clock to 166MHZ.
// NOTE! we assuem PLL3 (USBPLL1) has been locked to 480MHz already
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. */
SCB_DisableDCache();
PRINTF("FLEXSPI hyperflash example started!\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;
/* 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)
{
return status;
}
return 0;
/* Erase sectors. */
PRINTF("Erasing Serial NOR over FlexSPI...\r\n");
status = flexspi_nor_flash_erase_sector(FLEXSPI, SECTOR * SECTOR_SIZE);
if (status != kStatus_Success)
{
PRINTF("Erase sector failure !\r\n");
return -1;
}
/* Do software reset. */
FLEXSPI_SoftwareReset(FLEXSPI);
memset(s_hyperflash_program_buffer, 0xFF, sizeof(s_hyperflash_program_buffer));
memcpy(s_hyperflash_read_buffer, (void *)(FlexSPI_AMBA_BASE + SECTOR * SECTOR_SIZE),
sizeof(s_hyperflash_read_buffer));
if (memcmp(s_hyperflash_program_buffer, s_hyperflash_read_buffer, sizeof(s_hyperflash_program_buffer)))
{
PRINTF("Erase data - read out data value incorrect !\r\n ");
return -1;
}
else
{
PRINTF("Erase data - successfully. \r\n");
}
for (i = 0; i < sizeof(s_hyperflash_program_buffer); i++)
{
s_hyperflash_program_buffer[i] = i & 0xFFU;
}
status = flexspi_nor_flash_page_program(FLEXSPI, SECTOR * SECTOR_SIZE,
(void *)s_hyperflash_program_buffer);
if (status != kStatus_Success)
{
PRINTF("Page program failure !\r\n");
return -1;
}
/* Program finished, speed the clock to 166M. */
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);
/* Do software reset to reset AHB buffer. */
FLEXSPI_SoftwareReset(FLEXSPI);
memcpy(s_hyperflash_read_buffer, (void *)(FlexSPI_AMBA_BASE + SECTOR * SECTOR_SIZE),
sizeof(s_hyperflash_read_buffer));
if (memcmp(s_hyperflash_read_buffer, s_hyperflash_program_buffer, sizeof(s_hyperflash_program_buffer)) != 0)
{
PRINTF("Program data - read out data value incorrect !\r\n ");
return -1;
}
else
{
PRINTF("Program data - successfully. \r\n");
}
while (1)
{
}
}
