W25Q128和FPB_RA6E2的連接：

w25q128   fpb_ra6e2
VCC         VCC
GND         GND
DI          P109 (D11 / MOSI / PWM)
DO          P110 (D12 / MISO / PWM)
CLK         P111 (D13 / SCK)
CS          P301 (D10 / SS / PWM)

修改設(shè)備樹fpb_ra6e2.overlay

&spi0 {
    status = "okay";

    /* w25q128 節(jié)點(diǎn)定義 */
    w25q128: w25q128@0 {
        compatible = "jedec,spi-nor";
        reg = ; // 對應(yīng) cs-gpios 的第 0 個索引
        spi-max-frequency = ; // 最大頻率 40MHz

        /* w25q128 的 JEDEC ID: 廠商ID(ef), 內(nèi)存類型(40), 容量(18) */
        jedec-id = [ef 40 18];

		/* 134217728 bits = 16 Mbytes */
		size = ;

        /* 定義狀態(tài) */
        status = "okay";
    };
};

增加測試代碼main.c：

#include 
#include 
#include 

#include 
#include 
#include 
#include 
#include 
#include 
#include 


#include 
#include 

/* size of stack area used by each thread */
#define STACKSIZE 1024

/* scheduling priority used by each thread */
#define PRIORITY 7

/*
w25q128	  fpb_ra6e2
VCC			VCC
GND			GND
DI			P109 (D11 / MOSI / PWM)
DO			P110 (D12 / MISO / PWM)
CLK			P111 (D13 / SCK)
CS			P301 (D10 / SS / PWM)
*/
/* 注冊日志模塊 */
LOG_MODULE_REGISTER(spi_task, LOG_LEVEL_INF);

/* 通過設(shè)備樹獲取 w25q128 設(shè)備實(shí)例 */
/* 這里的 w25q128 必須與overlay 文件中的節(jié)點(diǎn)標(biāo)簽一致 */
#define FLASH_DEVICE_NODE DT_NODELABEL(w25q128)

void spi_task(void)
{
    const struct device *flash_dev = DEVICE_DT_GET(FLASH_DEVICE_NODE);

    /* 1. 檢查設(shè)備是否就緒 */
    if (!device_is_ready(flash_dev)) {
        LOG_ERR("Flash device %s is not ready!", flash_dev->name);
        return;
    }
    LOG_INF("Found Flash device: %s", flash_dev->name);

    /* 2. 定義測試數(shù)據(jù) */
    const off_t test_offset = 0x0000;           // 測試起始地址
    const size_t test_size = 4;                 // 測試數(shù)據(jù)大小
    uint8_t write_data[] = {0xAA, 0xBB, 0xCC, 0xDD};
    uint8_t read_data[4] = {0};
    int ret;

    /* 3. 擦除操作 (Flash 寫入前必須按扇區(qū)擦除) */
    /* w25q128 的最小擦除單位通常是 4096 字節(jié) (4KB) */
    LOG_INF("Erasing sector at offset 0x%lx...", (long)test_offset);
    ret = flash_erase(flash_dev, test_offset, 4096);
    if (ret != 0) {
        LOG_ERR("Flash erase failed! (err: %d)", ret);
        return;
    }

    /* 4. 寫入數(shù)據(jù) */
    LOG_INF("Writing data: 0x%02X %02X %02X %02X",
            write_data[0], write_data[1], write_data[2], write_data[3]);
    ret = flash_write(flash_dev, test_offset, write_data, sizeof(write_data));
    if (ret != 0) {
        LOG_ERR("Flash write failed! (err: %d)", ret);
        return;
    }

    /* 5. 讀取數(shù)據(jù)驗(yàn)證 */
    ret = flash_read(flash_dev, test_offset, read_data, sizeof(read_data));
    if (ret != 0) {
        LOG_ERR("Flash read failed! (err: %d)", ret);
        return;
    }
    LOG_INF("Readback data: 0x%02X %02X %02X %02X",
            read_data[0], read_data[1], read_data[2], read_data[3]);

    /* 6. 校驗(yàn)結(jié)果 */
    if (memcmp(write_data, read_data, sizeof(write_data)) == 0) {
        LOG_INF("SPI Flash Test PASSED!");
    } else {
        LOG_WRN("SPI Flash Test FAILED! Data mismatch.");
    }

    return;
}

K_THREAD_DEFINE(spi_id, STACKSIZE, spi_task, NULL, NULL, NULL,
		PRIORITY, 0, 0);

修改prj.conf

# 開啟 SPI 支持
CONFIG_SPI=y
# 開啟 Flash 驅(qū)動子系統(tǒng)
CONFIG_FLASH=y
# 開啟 JEDEC 標(biāo)準(zhǔn)的 SPI Flash 驅(qū)動
CONFIG_SPI_NOR=y
# 調(diào)試建議：開啟打印日志查看 Flash 是否識別成功
CONFIG_LOG=y
CONFIG_FLASH_LOG_LEVEL_DBG=y

測試結(jié)果：

[00:00:00.000,000]  ra_spi: frequency: 40000000
*** Booting Zephyr OS build v4.3.0-3782-gc611a16ecd7f ***
ADC reading[0]:
- adc@40170000, channel 0: Set up button at gpio@40080060 pin 4
Generating sawtooth signal at DAC channel 0.
PWM-based LED fade. Found 1 LEDs
[00:00:00.000,000]  spi_task: Found Flash device: w25q128@0
[00:00:00.000,000]  spi_task: Erasing sector at offset 0x0...
Watchdog sample application
Callback in RESET_SOC disabled for this platform
[00:00:00.000,000]  wdt_renesas_ra: actual window min = 0.00 ms
[00:00:00.000,000]  wdt_renesas_ra: actual window max = 1006.50 ms
[00:00:00.000,000]  wdt_renesas_ra: wdt timeout was set successfully
Feeding watchdog 5 times
Feeding watchdog...
541 = 435 mV
- adc@40170000, channel 2: 1918 = 1545 mV
[00:00:00.050,000]  spi_task: Writing data: 0xAA BB CC DD
Feeding watchdog...
[00:00:00.050,000]  spi_task: Readback data: 0xAA BB CC DD
[00:00:00.050,000]  spi_task: SPI Flash Test PASSED!

綜合代碼工程參考：FreeRTOS/zephyr_fpb_ra6e2

審核編輯 黃宇