【瑞萨FPB-RA6E2试用】W25Q128

W25Q128和FPB_RA6E2的连接：

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)

修改设备树fpb_ra6e2.overlay

&spi0 {
    status = "okay";

    /* w25q128 节点定义 */
    w25q128: w25q128@0 {
        compatible = "jedec,spi-nor";
        reg = < 0 >; // 对应 cs-gpios 的第 0 个索引
        spi-max-frequency = < 40000000 >; // 最大频率 40MHz

        /* w25q128 的 JEDEC ID: 厂商ID(ef), 内存类型(40), 容量(18) */
        jedec-id = [ef 40 18];

		/* 134217728 bits = 16 Mbytes */
		size = < 0x8000000 >;

        /* 定义状态 */
        status = "okay";
    };
};

增加测试代码main.c：

#include < inttypes.h >
#include < stddef.h >
#include < stdint.h >

#include < zephyr/device.h >
#include < zephyr/devicetree.h >
#include < zephyr/kernel.h >
#include < zephyr/sys/printk.h >
#include < zephyr/sys/util.h >
#include < zephyr/sys/__assert.h >
#include < zephyr/logging/log.h >


#include < zephyr/drivers/flash.h >
#include < zephyr/storage/flash_map.h >

/* 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)
*/
/* 注册日志模块 */
LOG_MODULE_REGISTER(spi_task, LOG_LEVEL_INF);

/* 通过设备树获取 w25q128 设备实例 */
/* 这里的 w25q128 必须与overlay 文件中的节点标签一致 */
#define FLASH_DEVICE_NODE DT_NODELABEL(w25q128)

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

    /* 1. 检查设备是否就绪 */
    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. 定义测试数据 */
    const off_t test_offset = 0x0000;           // 测试起始地址
    const size_t test_size = 4;                 // 测试数据大小
    uint8_t write_data[] = {0xAA, 0xBB, 0xCC, 0xDD};
    uint8_t read_data[4] = {0};
    int ret;

    /* 3. 擦除操作 (Flash 写入前必须按扇区擦除) */
    /* w25q128 的最小擦除单位通常是 4096 字节 (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. 写入数据 */
    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. 读取数据验证 */
    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. 校验结果 */
    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

# 开启 SPI 支持
CONFIG_SPI=y
# 开启 Flash 驱动子系统
CONFIG_FLASH=y
# 开启 JEDEC 标准的 SPI Flash 驱动
CONFIG_SPI_NOR=y
# 调试建议：开启打印日志查看 Flash 是否识别成功
CONFIG_LOG=y
CONFIG_FLASH_LOG_LEVEL_DBG=y

测试结果：

[00:00:00.000,000] < inf > 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] < inf > spi_task: Found Flash device: w25q128@0
[00:00:00.000,000] < inf > spi_task: Erasing sector at offset 0x0...
Watchdog sample application
Callback in RESET_SOC disabled for this platform
[00:00:00.000,000] < inf > wdt_renesas_ra: actual window min = 0.00 ms
[00:00:00.000,000] < inf > wdt_renesas_ra: actual window max = 1006.50 ms
[00:00:00.000,000] < inf > 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] < inf > spi_task: Writing data: 0xAA BB CC DD
Feeding watchdog...
[00:00:00.050,000] < inf > spi_task: Readback data: 0xAA BB CC DD
[00:00:00.050,000] < inf > spi_task: SPI Flash Test PASSED!

综合代码工程参考：FreeRTOS/zephyr_fpb_ra6e2

审核编辑 黄宇