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【NuMaker-M2354试用】SPI 驱动W25Q128

发布于 2021-12-12 23:44:59 浏览：1744 订阅该版

任务是测试spi接口

#功能模块的硬件介绍

开发版本身没有spi外设，没办法需要焊接或者连接spi外设。

经过芯片文档查询M2354由四组spi总线0-3

![spi总线框图.png](https://oss-club.rt-thread.org/uploads/20211212/b1cf3df32f3ecb277b942fe0b09f06e2.png.webp)

随机定使用SPI1 芯片手册、开发板用户手册查了一番，好多引脚有复用功能

![70498f3ae885046f3fe603a5de7d62a1.png.webp](https://oss-club.rt-thread.org/uploads/20211212/70498f3ae885046f3fe603a5de7d62a1.png.webp)

![芯片手册服用说明1.png](https://oss-club.rt-thread.org/uploads/20211212/668ecd8f0a238d352d8c5e82bdb8a239.png.webp)

![spi服用芯片手册2.png](https://oss-club.rt-thread.org/uploads/20211212/3d3561d58eeb8bf4c052d073cf43cc94.png)

这个就要确定程序demo里使用的是四个引脚 ，打开工程板级文件夹中引脚配置文件 board->nutool_pincfg.c
![程序钟确定spi引脚.png](https://oss-club.rt-thread.org/uploads/20211212/8e15137a85c00f03f6afd50b9b39eb73.png.webp)
一番查找确定使用的:

> SPI1_CS->PH9
> SPI1_CLK->PH8
> SPI1_MISO->PE1
> SPI1_MOSI->PE0

开发版对应丝印
> SPI1_CS->PH9   ------- JP9.12   108
> SPI1_CLK->PH8  ------- JP9.11   107
> SPI1_MISO->PE1 ------- JP9.9    105
> SPI1_MOSI->PE0 ------- JP9.10   106

SPI外设接W25Q128 
懒得找板子割线再跳线焊线，直接找了个芯片手焊了
![微信图片_20211212205731.jpg](https://oss-club.rt-thread.org/uploads/20211212/699f220754546a9216c39da295fb9a08.jpg)
![微信图片_20211212205714.jpg](https://oss-club.rt-thread.org/uploads/20211212/4a5bd67c6c5cd773f11d32bb3e84e631.jpg)
![微信图片_20211212205721.jpg](https://oss-club.rt-thread.org/uploads/20211212/5b3226403ec000c41222aa7bad98d6f4.jpg)
最终连接效果图
![微信图片_20211212210145.jpg](https://oss-club.rt-thread.org/uploads/20211212/4cc2d75d2114a34951f88b12ebbe79a6.jpg)

#功能模块的使用说明
接下来修改程序
目录rt-thread-4.0.4\bsp\nuvoton\numaker-m2354打开env
输入命令menuconfig
 Hardware Drivers Config → On-chip Peripheral Drivers → Enable Serial Peripheral Interface(SPI)
 ![d85dcdeb32a86db7fe2225ae7314084d.png.webp](https://oss-club.rt-thread.org/uploads/20211212/d85dcdeb32a86db7fe2225ae7314084d.png.webp)
保存退出 输入scons --target=mdk5 打开keil 编译下载，查看spi1总线是否使能
![spi1总线有了.png](https://oss-club.rt-thread.org/uploads/20211212/3003ea90f612aec0b632b7a873f9f4f4.png)
接下来需要挂载spi外设
添加spi_flash_init.c 
![spiflashc.png](https://oss-club.rt-thread.org/uploads/20211212/25cd59973130050c636ebff80c5416d1.png.webp)
```
/*
 * Change Logs:
 * Date           Author       Notes
 * 2021-12-10     lizhengyang  add spi flash port file
 */

#include <rtthread.h>
#include "spi_flash.h"
#include "spi_flash_sfud.h"
#include "drv_spi.h"
#include "drv_gpio.h"

static int rt_hw_spi_flash_init(void)
{
	  rt_err_t result;
	
	  struct rt_spi_device *spi_device;	
		char *bus_name="spi1";
		char *device_name="spi10";
	  char *spi_flash_dev_name="W25Q128";

nutool_modclkcfg_init_gph();
    nutool_modclkcfg_init_gpe();
	
    CLK_EnableModuleClock(SPI1_MODULE);
    /* Select SPI1 peripheral clock source as PCLK1 */
    CLK_SetModuleClock(SPI1_MODULE, CLK_CLKSEL2_SPI1SEL_PCLK0, MODULE_NoMsk);

/*---------------------------------------------------------------------------------------------------------*/
    /* Init I/O Multi-function                                                                                 */
    /*---------------------------------------------------------------------------------------------------------*/		
    SYS->GPE_MFPL &= ~(SYS_GPE_MFPL_PE1MFP_Msk | SYS_GPE_MFPL_PE0MFP_Msk);
    SYS->GPE_MFPL |= (SYS_GPE_MFPL_PE1MFP_SPI1_MISO | SYS_GPE_MFPL_PE0MFP_SPI1_MOSI);
    SYS->GPH_MFPH &= ~(SYS_GPH_MFPH_PH9MFP_Msk | SYS_GPH_MFPH_PH8MFP_Msk);
    SYS->GPH_MFPH |= (SYS_GPH_MFPH_PH9MFP_SPI1_SS | SYS_GPH_MFPH_PH8MFP_SPI1_CLK);

/* attach the device to spi bus*/
    spi_device = (struct rt_spi_device *)rt_malloc(sizeof(struct rt_spi_device));
    RT_ASSERT(spi_device != RT_NULL);

result=rt_spi_bus_attach_device(spi_device,device_name,bus_name,RT_NULL);
    if (result != RT_EOK)
    {
        LOG_E("%s attach to %s faild, %d\n", device_name, bus_name, result);
    }
		
    RT_ASSERT(result == RT_EOK);

LOG_D("%s attach to %s done", device_name, bus_name);

if (RT_NULL == rt_sfud_flash_probe(spi_flash_dev_name, device_name))
    {
        return -RT_ERROR;
    }

return RT_EOK;
}
INIT_COMPONENT_EXPORT(rt_hw_spi_flash_init);
```
![挂在成功.png](https://oss-club.rt-thread.org/uploads/20211212/3124e6aeea6b759e4e78883d42bfacbd.png)
接下就是参考 [rtthread文档中心](https://www.rt-thread.org/document/site/#/rt-thread-version/rt-thread-standard/programming-manual/device/spi/spi)
![2883d214d5282c2c5ff952ef6741480b.png.webp](https://oss-club.rt-thread.org/uploads/20211212/2883d214d5282c2c5ff952ef6741480b.png.webp)
```
/*
 * 程序清单：这是一个 SPI 设备使用例程
 * 例程导出了 spi_w25q_test 命令到控制终端
 * 命令调用格式：spi_w25q_test spi10
 * 命令解释：命令第二个参数是要使用的SPI设备名称，为空则使用默认的SPI设备
 * 程序功能：通过SPI设备读取 w25q 的 ID 数据
*/

#include <rtthread.h>
#include <rtdevice.h>

#define W25Q_SPI_DEVICE_NAME     "W25Q128"

static void spi_w25q_test(int argc, char *argv[])
{
    struct rt_spi_device *spi_dev_w25q;
    char name[RT_NAME_MAX];
    rt_uint8_t w25x_read_id = 0x90;
    rt_uint8_t id[5] = {0};

if (argc == 2)
    {
        rt_strncpy(name, argv[1], RT_NAME_MAX);
    }
    else
    {
        rt_strncpy(name, W25Q_SPI_DEVICE_NAME, RT_NAME_MAX);
    }

/* 查找 spi 设备获取设备句柄 */
    spi_dev_w25q = (struct rt_spi_device *)rt_device_find(name);
    if (!spi_dev_w25q)
    {
        rt_kprintf("spi sample run failed! can't find %s device!\n", name);
    }
    else
    {
//        /* 方式1：使用 rt_spi_send_then_recv()发送命令读取ID */
//        rt_spi_send_then_recv(spi_dev_w25q, &w25x_read_id, 1, id, 5);
//        rt_kprintf("use rt_spi_send_then_recv() read w25q ID is:%x%x\n", id[3], id[4]);

/* 方式2：使用 rt_spi_transfer_message()发送命令读取ID */
        struct rt_spi_message msg1, msg2;

msg1.send_buf   = &w25x_read_id;
        msg1.recv_buf   = RT_NULL;
        msg1.length     = 1;
        msg1.cs_take    = 1;
        msg1.cs_release = 0;
        msg1.next       = &msg2;

msg2.send_buf   = RT_NULL;
        msg2.recv_buf   = id;
        msg2.length     = 5;
        msg2.cs_take    = 0;
        msg2.cs_release = 1;
        msg2.next       = RT_NULL;

rt_spi_transfer_message(spi_dev_w25q, &msg1);
        rt_kprintf("\r\nRead w25q ID is:%x%x\r\n", id[3], id[4]);				
		}
		
				
}
/* 导出到 msh 命令列表中 */
MSH_CMD_EXPORT(spi_w25q_test, spi w25q sample);
```
list_device 查看w25q128是否挂载成功
![演示deviec瓜子啊陈工.png](https://oss-club.rt-thread.org/uploads/20211212/9b13d274d43b55ba36f4d8fa5b4714c6.png)

TAB键查看测试程序是否进入RT-Thread shell commands列表中
![微信截图_20211212213640.png](https://oss-club.rt-thread.org/uploads/20211212/b335da2f5e4e4e2d047bfea93f71bdb2.png)
#模块功能演示
![bd081aeb1f5f6e698e60a741e83ef0eb.gif](https://oss-club.rt-thread.org/uploads/20211212/bd081aeb1f5f6e698e60a741e83ef0eb.gif)

bilibili演示地址https://www.bilibili.com/video/BV1cF41167M6/
#代码下载链接
https://gitee.com/want_to_be_a_vassal/numaker-m2354-spi_wdt_test.git
#心得体会
在编写spi_flash_init.c中static int rt_hw_spi_flash_init(void)根据stm32模板修改出现了spi10挂在spi1成功，但是w25q128死活挂在不上去，程序一直卡顿如图
![spi10挂在spi1.png](https://oss-club.rt-thread.org/uploads/20211212/ea9bc3fe8426f2bdf1682b30ebd4f511.png)
经过一顿仿真程序卡在sfud初始化配置w25q128 具体位置如图显示。在没有找到问题的时候一度怀疑我的焊接技术出了问题，或者这个片子已经坏掉了，为了排除问题不得不使用标准库函数裸驱动测试了一番。
测试证明焊接没有问题，测试都正常。经过一天多的查找没有头绪，最终确定stm32驱动模式不适合新唐，stm32挂在spi外设需要把具体的cs引脚传入到rt_spi_bus_attach_device，新唐只需要把spi1的基地址传入就可以，最终尝试初始化一遍引脚，结果可以了。
![cs没有拉低.png](https://oss-club.rt-thread.org/uploads/20211212/5c5c5b0a9838d3dbb79604279d924f0e.png.webp)
接着又出现rtt默认的频率超过新唐设定频率
![初始化频率设置超过默认.png](https://oss-club.rt-thread.org/uploads/20211212/4ece5002a9b1ea4ec950637db9b3403b.png)
修改频率
![最高频率.png](https://oss-club.rt-thread.org/uploads/20211212/b1a96d8be773c35280d42cbe6d411a2f.png)
最后有个疑惑spi_w25q128_test 在没有带参数的情况出现如图情况，这个找到问题所在。大佬可以接货一下。
![缺少参数以后.png](https://oss-club.rt-thread.org/uploads/20211212/c403ae0369e30fd52783eb00af7c3124.png.webp)