使用带有PIC32MZ_DA开发板的FreeRTOS进行SD卡安装

下面是使它工作的步骤。SD卡项目与FreeRTOSInstructions有关如何创建一个由FrRetos、SD Cara、PIC32 MS（带有SD主机控制器芯片）和FAT32文件系统组成的项目。系统配置MPLAB X3.65和谐203B的目标是使SD卡安装（MU）。创建一个新的项目在Apple FooDebug目标设备PIC32 MZ2064 DAH169中，当系统服务中的配置器OpenSSADD文件系统在系统服务的“时钟”中启用“第四”RealthyCLKO在列表中（第二个从上一个参考时钟）中的时钟检查“参考时钟输出使OE”在“驱动程序”下检查“SD主机控制器”下的“定时器”（在驱动程序中）TMR驱动程序实例0’被检查改变计时器模块到“TMRA ID2”在第三部分下的BSP配置下选择“PIC32 MZ DA启动工具包W 内部DDR”。IES & GT；从下拉列表中选择Box选择“FrRetos”，将“RTOS配置”扩展到“总堆大小”下，将其更改为“4000保存”，并在“AppStimultCyFig Debug 框架”中添加Office打开的文件“StasyBaseTract.As”。文件/ *SDHC中断*//Extn，ththeLeRDRvSDHC.Cudio.VECRTHOR191，代码，KEPE.VECRTORIX CHY191，ItvECdRDVSDHCGLUX，OVEL，VECRTORY，DISCORCHY191集NoMICROROPS.SET NOREORAD.SET NOMIPS16.SET NOAT.EntEncDeVDRTVSDHCN VECRTORDVSDHC：PoSAVEEL CONTEXLA S6，IntHandlerDrvSDHCJALR S6NoWestRealEngult.EntEnvCutRDVSDHCIN“StaseOx任务”将下列“SysffsTasks-（）”循环到“ySysStaskEffice”中的“SysTrtMyTasks任务（SysObj.SyrMR）”中，将“DyvsSDHCII任务（SysObj.DrvSDHC）”添加到“OySysS任务”中的循环中，将“DRVYSDSDHCI任务（SysObj.DrvSDHC）”添加到“在“SythyIn.c”中添加“SysSytInEnable（）”的“ySysState任务”中的“VTaskDelphi”函数调用；在“App.c”中，函数的“SysSudialItate（空洞*数据）”的底部将下面的代码放在“AppJuthState OnIT”应用程序状态中。相同的代码来自App.AppApHythEngInIt的样本：如果（SysffsIn安装（“/DEV/MMCBLK1”，“/MNT/MyDube”，FAT，0，NULL）！= 0）{/*无法安装磁盘。尝试再次安装直到成功。*/AppDATA状态= APPYSTATEJIN；} {{/*挂载是成功的。设置当前驱动器，使我们不必使用绝对路径。*/AppDATA状态= APPYSTATEXServices任务；



      以下为原文

    Here are the steps required to make it work.
 
SD Card project with FreeRTOS
Instructions on how to create a project consisting of freeRTOS, SD Cara, PIC32MS (with a SD Host Controller Chip) and a fat32 files system.
 
System configuration
MPLAB X 3.65
Harmony 203b
The Goal is to get the SD Card to mount (must have this prior to using it).
 

Create a new project in apps folder

Target Device PIC32MZ2064DAH169

When configurator opens

Add file system in System Services
In “clock” of system services enable the fourth ‘REFERENCE_CLKO’ down in list (second from last reference clock)
In that clock check the “ reference clock output enable OE’
Under ‘driver’

Check the “SD Host Controller”
Under the “timer” (in drivers)

‘TMR Driver Instance 0’ is checked
Change the Timer Module to “TMR_ID_2”



Select “PIC32MZ DA Starter Kit w Internal DDR” under the BSP Configuration
Under Third Parties -> RTOS

Check the box
Select “FreeRTOS” from drop down list
Expand the “RTOS Configuration”

Down under “Total heap size” change this to 40000





Save and generate code for the configuration
Open the file “system_interrupt_a.S” in the “appsystem_configdefaultframework”

Add this to the bottom of the file

 
/* SDHC Interrupt */
  .extern  IntHandlerDrvSDHC
 
  .section .vector_191,code, keep
  .equ     __vector_dispatch_191, IntVectorDrvSDHC
  .global  __vector_dispatch_191
  .set     nomicromips
  .set     noreorder
  .set     nomips16
  .set     noat
  .ent  IntVectorDrvSDHC
 
IntVectorDrvSDHC:
   portSAVE_CONTEXT
   la    s6,  IntHandlerDrvSDHC
   jalr  s6
   nop
   portRESTORE_CONTEXT
   .end IntVectorDrvSDHC



In “system_tasks” do the following things

Move “SYS_FS_Tasks()” into loop in “_SYS_Tasks”
Move “SYS_TMR_Tasks(sysObj.sysTmr)” into loop in “_SYS_Tasks”
Add “DRV_SDHC_Tasks(sysObj.drvSDHC)” into loop in “_SYS_Tasks” This function is not called anywhere else.
Remove the “vTaskDelay” function call in “_SYS_Tasks”

In “system_init.c” add “    SYS_INT_Enable();” to the bottom of the function “SYS_Initialize( void * data)”
In “app.c” put the following code in the “APP_STATE_INIT” app state. Same code from the sample app.
 
       case APP_STATE_INIT:
           if(SYS_FS_Mount("/dev/mmcblka1", "/mnt/myDrive", FAT, 0, NULL) != 0)
           {
               /* The disk could not be mounted. Try
                * mounting again untill success. */
 
               appData.state = APP_STATE_INIT;
           }
           else
           {
               /* Mount was successful. Set current drive so that we do not have to use absolute path. */
 
               appData.state = APP_STATE_SERVICE_TASKS;
           }
           Break;
 
 
 

嘿！只是想说声谢谢，因为找到你的帖子是一个很好的节省时间的方法。似乎缺少的是程序集文件中的中断向量处理程序。我在没有RTOS的情况下工作，只是复制了你在“StasyBufftT.T.S”文件中张贴的处理程序功能。论坛中有一些帖子似乎缺少相同的内容，所以我将把它们重定向到这里。谢谢你，伙计！-马尔科



      以下为原文

    Hey!
Just wanted to say thank you, because finding your post has been a great time saver. Seems that the thing missing was the interrupt vector handler in the assembly file. I got it working without the RTOS, just by copying the handler function you posted in the "system_interrupt_a.s" file.
There are some posts in the forum that seem to be missing the same, so I am going to redirect them here.
Thank you, pal!
 
-Marko