Things to prepare

Indispensable
- RX72N Envision Kit × 1 unit
- USB cable (USB Micro-B --- USB Type A) × 2
- Windows PC × 1 unit
  - Tools to be installed in Windows PC
    - e2 studio 2020-04
      - Initial boot sometimes takes time
    - CC-RX V3.02 or later

Prerequisite

Generate new project (bare metal) must be completed.
- In this section, implement by adding the code of how to access Macronix serial flash to LED 0.1 second cycle blinking program which was generated in Generate new project (bare metal)

Check circuit

- QSPI (Quad Serial Peripheral Interface) is an interface of 6 lines in total, including four data signal lines, one data synchronous clock signal line and one chip select signal line as shown in the above circuit SIO0-SIO3.
- In general, SPI has one data signal line, on the other hand, QSPI has four.
- Accordingly, the transfer efficiency of QSPI per one clock is four times better than that of SPI, thereby, high speed.

Set QSPI driver software with Smart Configurator

Add component

- Add four components as shown above.
  - r_qspi_smstr_rx (Explained in the above screenshot)
  - r_flash_spi
  - r_memdrv_rx
  - r_sys_time_rx

Set component

r_qspi_smstr_rx

Perform setting in which QSPI related pins are used

r_flash_spi

None (Source code requires fine-tune later)

r_memdrv_rx

Connect memory driver to QSPI
Change the transfer clock frequency of QSPI to 30MHz.

r_sys_time_rx

None

Pin setting

- Since RX72N MCU assigns multiple functions to one pin, you need to perform setting of which function to be used with software.
- In RX72N Envision Kit, QSPI serial flash is controlled by five pins of PD2, PD3, PD5, PD6 and PD7
- Since PD4 is connected to #CS (chip select), and unlike other pins, this pin is not controlled by QSPI function but by general-purpose port function, the setting of PD4 is performed separately with the FIT module on r_flash_spi side. (Improvement is required)
- Perform setting on Smart Configurator as shown in the above picture to generate code.
- By reading Board Configuration File (BDF), "pin setting" on Smart Configurator is automated.

r_flash_spi (Fine-tune of source code)

/src/smc_gen/r_config/r_flash_spi_pin_config.h

#define FLASH_SPI_CS_DEV0_CFG_PORTNO    'D'     /* Device 0 Port Number : FLASH SS#    */
#define FLASH_SPI_CS_DEV0_CFG_BITNO     '4'     /* Device 0 Bit Number  : FLASH SS#    */

Coding of main() function

Add code to rx72n_envision_kit.c as shown below.
In this code, write/read the repeated pattern of "0x12345678, 0x9abcdef0" into serial flash. And repeat this for 1MB.
Overwriting can not be performed in serial flash, accordingly, you need to write after elimination. Perform elimination with SERIAL_FLASH_STATE_ERASE in main ().

#include "r_smc_entry.h"
#include "platform.h"
#include "r_cmt_rx_if.h"
#include "r_flash_spi_if.h"
#include "r_flash_spi_config.h"
#include "r_sys_time_rx_if.h"

/*******************************************************************************
Macro definitions
*******************************************************************************/
#define SERIAL_FLASH_TASK_DATA_SIZE (0x00100000)
#define SERIAL_FLASH_64KB_SIZE (0x00010000)
#define SERIAL_FLASH_PAGE_SIZE (256)

/*******************************************************************************
Typedef definitions
*******************************************************************************/
typedef enum e_serial_flash_state
{
    SERIAL_FLASH_STATE_ERASE,
    SERIAL_FLASH_STATE_ERASE_WAIT_COMPLETE,
    SERIAL_FLASH_STATE_WRITE,
    SERIAL_FLASH_STATE_WRITE_WAIT_COMPLETE,
    SERIAL_FLASH_STATE_READ,
    SERIAL_FLASH_STATE_FINISH,
    SERIAL_FLASH_STATE_ERROR
} serial_flash_state_t;

/*******************************************************************************
Imported global variables and functions (from other files)
*******************************************************************************/

/*******************************************************************************
Exported global variables and functions (to be accessed by other files)
*******************************************************************************/
const uint32_t cbuf1[SERIAL_FLASH_PAGE_SIZE/sizeof(uint32_t)] = {
        0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0,
        0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0,
        0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0,
        0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0,
        0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0,
        0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0,
        0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0,
        0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0, 0x12345678, 0x9abcdef0
};
static uint32_t cbuf2[SERIAL_FLASH_PAGE_SIZE/sizeof(uint32_t)];
static uint8_t  gDevNo;
static uint8_t  gStat;
static serial_flash_state_t g_serial_flash_state;

/*******************************************************************************
Private global variables and functions
*******************************************************************************/
void main(void);
void cmt_callback(void *arg);
static serial_flash_state_t serial_flash_update(void);

void main(void)
{
	uint32_t channel;
	R_CMT_CreatePeriodic(10, cmt_callback, &channel);

    serial_flash_state_t state;
    /* wait completing gui initializing */
    R_SYS_TIME_RegisterPeriodicCallback(R_FLASH_SPI_1ms_Interval, 1);
    gDevNo = FLASH_SPI_DEV0;
    R_FLASH_SPI_Open(gDevNo);
    R_FLASH_SPI_Set_4byte_Address_Mode(gDevNo);
    R_FLASH_SPI_Quad_Enable(gDevNo);
    R_FLASH_SPI_Read_Status(gDevNo, &gStat); // debug (gStat & 0x40) != 0x00
    R_FLASH_SPI_Set_Write_Protect(gDevNo, 0);
    R_FLASH_SPI_Read_Status(gDevNo, &gStat); // debug gStat & (0x0f << 2) !=0x00
    g_serial_flash_state = SERIAL_FLASH_STATE_ERASE;
    while(1)
    {
        serial_flash_update();
    }
}

void cmt_callback(void *arg)
{
	if(PORT4.PIDR.BIT.B0 == 1)
	{
		PORT4.PODR.BIT.B0 = 0;
	}
	else
	{
		PORT4.PODR.BIT.B0 = 1;
	}
}

static serial_flash_state_t serial_flash_update(void)
{
    static uint32_t serial_flash_address = 0;
    static flash_spi_info_t Flash_Info_W;
    static flash_spi_info_t Flash_Info_R;
    static flash_spi_erase_info_t Flash_Info_E;

    switch (g_serial_flash_state)
    {
        case SERIAL_FLASH_STATE_ERASE:
            Flash_Info_E.addr   = serial_flash_address;
            Flash_Info_E.mode   = FLASH_SPI_MODE_B64K_ERASE;
            if (R_FLASH_SPI_Erase(gDevNo, &Flash_Info_E) == FLASH_SPI_SUCCESS)
            {
                g_serial_flash_state = SERIAL_FLASH_STATE_ERASE_WAIT_COMPLETE;
            }
            else
            {
                g_serial_flash_state = SERIAL_FLASH_STATE_ERROR;
            }
            break;
        case SERIAL_FLASH_STATE_ERASE_WAIT_COMPLETE:
            if (R_FLASH_SPI_Polling(gDevNo, FLASH_SPI_MODE_ERASE_POLL) == FLASH_SPI_SUCCESS)
            {
				serial_flash_address += SERIAL_FLASH_64KB_SIZE;
				if (SERIAL_FLASH_TASK_DATA_SIZE == serial_flash_address)
				{
					serial_flash_address = 0;
					Flash_Info_W.cnt     = SERIAL_FLASH_TASK_DATA_SIZE;
					g_serial_flash_state = SERIAL_FLASH_STATE_WRITE;
				}
				else
				{
					g_serial_flash_state = SERIAL_FLASH_STATE_ERASE;
				}
            }
            break;
        case SERIAL_FLASH_STATE_WRITE:
            Flash_Info_W.addr    = serial_flash_address;
            Flash_Info_W.p_data  = (uint8_t *)cbuf1;
            Flash_Info_W.op_mode = FLASH_SPI_QUAD;
            if (R_FLASH_SPI_Write_Data_Page(gDevNo, &Flash_Info_W) == FLASH_SPI_SUCCESS)
            {
                g_serial_flash_state = SERIAL_FLASH_STATE_WRITE_WAIT_COMPLETE;
            }
            else
            {
                g_serial_flash_state = SERIAL_FLASH_STATE_ERROR;
            }
            break;
        case SERIAL_FLASH_STATE_WRITE_WAIT_COMPLETE:
            if (R_FLASH_SPI_Polling(gDevNo, FLASH_SPI_MODE_PROG_POLL) == FLASH_SPI_SUCCESS)
            {
				serial_flash_address += SERIAL_FLASH_PAGE_SIZE;
				if (SERIAL_FLASH_TASK_DATA_SIZE == serial_flash_address)
				{
					serial_flash_address = 0;
					g_serial_flash_state = SERIAL_FLASH_STATE_READ;
				}
				else
				{
					g_serial_flash_state = SERIAL_FLASH_STATE_WRITE;
				}
            }
            break;
        case SERIAL_FLASH_STATE_READ:
            Flash_Info_R.cnt     = SERIAL_FLASH_PAGE_SIZE;
            Flash_Info_R.addr    = serial_flash_address;
            Flash_Info_R.p_data  = (uint8_t *)cbuf2;
            Flash_Info_R.op_mode = FLASH_SPI_QUAD;
            if (R_FLASH_SPI_Read_Data(gDevNo, &Flash_Info_R) == FLASH_SPI_SUCCESS)
            {
				serial_flash_address += SERIAL_FLASH_PAGE_SIZE;
				if (SERIAL_FLASH_TASK_DATA_SIZE == serial_flash_address)
				{
                     serial_flash_address = 0;
                     g_serial_flash_state = SERIAL_FLASH_STATE_FINISH;
                }
            }
            else
            {
                g_serial_flash_state = SERIAL_FLASH_STATE_ERROR;
            }
            break;
        case SERIAL_FLASH_STATE_FINISH:
            /* If do not want to repeat SERIAL_FLASH_STATE_FINISH, update the state. */
            break;
        case SERIAL_FLASH_STATE_ERROR:
            R_FLASH_SPI_Write_Di(gDevNo);
            break;
        default:
            break;
    }
    return g_serial_flash_state;
}

1+QSPI+Serial flash driver (for Macronix) - renesas/rx72n-envision-kit GitHub Wiki

Things to prepare

Prerequisite

Check circuit

Set QSPI driver software with Smart Configurator

Add component

Set component

r_qspi_smstr_rx

r_flash_spi

r_memdrv_rx

r_sys_time_rx

Pin setting

r_flash_spi (Fine-tune of source code)

Coding of main() function

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1+QSPI+Serial flash driver (for Macronix) - renesas/rx72n-envision-kit GitHub Wiki

Things to prepare

Prerequisite

Check circuit

Set QSPI driver software with Smart Configurator

Add component

Set component

r_qspi_smstr_rx

r_flash_spi

r_memdrv_rx

r_sys_time_rx

Pin setting

r_flash_spi (Fine-tune of source code)

Coding of main() function

Return to home / ホームに戻る

⚠️ **GitHub.com Fallback** ⚠️

⚠️ GitHub.com Fallback ⚠️