mtk rda 从bootload开始分析如何加载lcd驱动

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本文详细解析了嵌入式系统的启动流程，从Boot Sector NAND 和 Boot Sector 的定义开始，逐步深入介绍了Boot Loader的主要功能，包括内存初始化、加载驱动及进入main函数的过程。随后文章讲述了SAP Main初始化阶段的任务分配和调度，以及BAL_Init中关键步骤如内存管理和文件系统初始化等。

#define BOOT_SECTOR_NAND_SECTION_START __attribute__((section (".boot_sector_nand_start")))

#define BOOT_SECTOR_SECTION_START __attribute__((section (".boot_sector_start")))

1.boot_sector_nand.c

PROTECTED VOID BOOT_SECTOR_NAND_SECTION_START boot_Sector_Nand(UINT32 param)

2.boot_sector.c

PROTECTED VOID BOOT_SECTOR_SECTION_START boot_Sector(UINT32 param)

2 .1

/// Initialize flash memory and RAM memory.

// Copy booting code & data from ROM space to internal SRAM.

boot_MemInit ： Initialize flash memory and RAM memory.

3. boot_loader.c

//// Real implementation of the boot loader, loading code after the stack has been reseted in #boot_LoaderEnter();

PROTECTED VOID boot_Loader(UINT32 param)

bootloader 做了几件重要的事情

3.1 把ROM里面的数据copy到内部sram里面

3.2加载驱动 hal_Open(tgt_GetHalConfig());

tgt_GetHalConfig PROTECTED CONST HAL_CFG_CONFIG_T g_tgtHalCfg = TGT_HAL_CONFIG;

tgt_board_cfg.h//加载各部分驱动配置

#define TGT_HAL_CONFIG \

{ \

.chipVersion = TGT_HAL_CHIP_VERSION, \

.rfClkFreq = TGT_HAL_RF_CLK_FREQ, \

.useLpsCo1 = FALSE, \

.keyInMask = 0x1f, \

.keyOutMask = 0x1f, \

.pwmCfg = TGT_HAL_PWM_CFG, \

.useUsbBackup = FALSE, \

.useClk32k = FALSE, \

.i2cCfg = TGT_HAL_I2C_CFG, \

.i2c1UseCamPins = FALSE, \

.i2sCfg = TGT_HAL_I2S_CFG, \

.ebcCfg = TGT_HAL_EBC_CFG, \

.uartCfg = TGT_HAL_UART_CFG, \

.spiCfg = TGT_HAL_SPI_CFG, \

.useSdmmc = TRUE, \

.useSdmmc2 = FALSE, \

.spi2UseCamPins = FALSE, \

.camCfg = TGT_HAL_CAM_CFG, \

.goudaCfg = TGT_HAL_GOUDA_CFG, \

.noConnectGpio = TGT_HAL_NO_CONNECT_GPIO, \

.usedGpio = TGT_HAL_USED_GPIO, \

.usedGpo = TGT_HAL_USED_GPO, \

.usedTco = TGT_HAL_USED_TCO, \

.ioDrive = TGT_HAL_IO_DRIVE \

}

3.3 进入main函数

4. sap_main.c

int main (int argc, char *argv[])

main做了几件重要的事情

4.1 分配heap 堆

4.2 开启进程 sxs_StartAll ();

4.3 检测任务和任务调度

sxr_CheckTask

// Never return

sxr_StartScheduling ();

5. sap_main.c

void sxs_StartAll (void)

5.1对各种进程初始化

5.2 新建任务 sxr_NewTask

5.3 开启任务 sxr_StartTask

u8 TaskId = sxs_usrInitTaskId [i] = sxr_NewTask (&sxs_UsrInitTaskCfg [i].TaskDesc);

sxr_StartTask (TaskId, (void *) sxs_UsrInitTaskCfg [i].UsrInitTask);

const sxs_UsrInitTaskCfg_t sxs_UsrInitTaskCfg [] =

{

#ifdef __DISPLAY_POWERON_LOGO__

{

{

(void(*)(void *))sxs_UsrInitTask,

0,

"USR INIT: Power-on LOGO",

USR_INIT_POWER_ON_LOGO_TASK_STACK_SIZE,

USR_INIT_POWER_ON_LOGO_TASK_PRIORITY

},

(void(*)(void))&lcd_present_CS_log

},

#endif //__DISPLAY_POWERON_LOGO__

{

{

(void(*)(void *))sxs_UsrInitTask,

0,

"USR_INIT: BAL Init Task",

USR_INIT_BAL_INIT_TASK_STACK_SIZE,

USR_INIT_BAL_INIT_TASK_PRIORITY

},

(void(*)(void))& BAL_TaskInit

},

{

{

(void(*)(void *))sxs_UsrInitTask,

0,

"USR_INIT: Decompress Task",

USR_INIT_DECOMPRESS_TASK_STACK_SIZE,

USR_INIT_DECOMPRESS_TASK_PRIORITY

},

(void(*)(void))&BAL_DecompressCode

},

};

6. bal_init.c

BOOL BAL_TaskInit()

taskinit做了几件重要的事情

6.1 csw_MemIint(); //初始化内存分配 tgt_app

VDS_Init

DSM_DevInit // describes the DSM(Data Storage Mangage) configuration

REG_Init

CFW_CfgInit

SMS_DM_Init

FS_PowerOn

FS_GetDeviceInfo // // Get FS device table.

// Check the state of root device ,if not format, format it.

// Mount root device.

//文件系统建立好之后开始开启任务 // Start application tasks

for(i = 0; i< MAX_BAL_TASK_NUM; i++)

g_BalTasks[i] = HNULL;

g_BalTasks[BAL_TASK_NUM(BAL_SYS_TASK_PRIORITY)] = COS_CreateTask_Prv(BAL_SysTask, NULL, NULL,

BAL_SYS_TASK_STACK_SIZE, BAL_SYS_TASK_PRIORITY, COS_CREATE_DEFAULT, 0, "BAL_SysTask");

#ifdef CFW_TCPIP_SUPPORT

g_BalTasks[BAL_TASK_NUM(BAL_CFW_ADV_TASK_PRIORITY)] = COS_CreateTask_Prv(BAL_CFWApsTask, NULL, NULL,

BAL_CFW_ADV_TASK_STACK_SIZE, BAL_CFW_ADV_TASK_PRIORITY, COS_CREATE_DEFAULT, 0, "BAL_CFWApsTask");

#endif

g_BalTasks[BAL_TASK_NUM(BAL_DEV_MONITOR_TASK_PRIORITY)] = COS_CreateTask_Prv(BAL_DevMonitorTask, NULL, NULL,

BAL_DEV_MONITOR_TASK_STACK_SIZE, BAL_DEV_MONITOR_TASK_PRIORITY, COS_CREATE_DEFAULT, 0, "BAL_DevMonitorTask");

g_BalTasks[3] = COS_CreateTask_Prv(BAL_BackgroundTask, NULL, NULL,

BAL_BG_TASK_STACK_SIZE, COS_BK_TASK_PRI, COS_CREATE_DEFAULT, 0, "BAL_BackgroundTask");

BAL_ApplicationInit();

#ifdef WIFI_SUPPORT

wifi_task_init();

#endif

7. TaskInit.c //应用层任务建立初始化

BOOL BAL_ApplicationInit ( VOID )

1. // Require mmi clk

csw_SetResourceActivity(CSW_LP_RESOURCE_MMIACTIVE, CSW_SYS_FREQ_104M);

7.2 COS_CreateTask //创建任务

7.3 COS_StartTask //开启任务

eg：

hTask = COS_CreateTask(BAL_MmiMainTaskEntry,

NULL, NULL,

MMI_TASK_STACK_SIZE,

MMI_TASK_PRIORITY,

COS_CREATE_SUSPENDED, 0, "MMI Main Task");

ASSERT(hTask != HNULL);

SetMmiTaskHandle(MOD_MMI, hTask);

COS_StartTask((TASK_HANDLE*)GetMmiTaskHandle(MOD_MMI), NULL);

8. MMITask.c

void BAL_MmiMainTaskEntry(void *pData)

BAL_MmiMainTaskEntry做了四件事情

8.1

StartTimer(TIMER_REAL_TIME_CLOCK, 1000, DateTimerProc); //开启定时器

8.2

switch (ppower_on->poweron_mode) // 注册开机

POWER_ON_KEYPAD 0

POWER_ON_ALARM 1

POWER_ON_CHARGER_IN 2

POWER_ON_EXCEPTION 3

InitializeResourceVariables();

MMICheckDiskDisplay(); //display logo

/*Guojian Add End For 10810 Ver: GreenStone on 2008-12-19 13:59 */

ResetAbnormalReset();

InitializeAll();

/**************************************

* To initialize nvram data

***************************************/

InitNvramData();

TurnOnBacklight(1);

8.3 注册耳机gpio事件//

8.4

ProtocolEventHandler(Message->msg_id,(void*)Message->local_para_ptr,(int)Message->src_mod_id, (void*) Message); // 处理其他消息事件

9. MMITask.c

void MMICheckDiskDisplay(void)

/* init graphic library. including lcd and all drawing related modules */

gdi_init();

10. gdi.c

gdi_init

11. gdi_lcd.c

gdi_lcd_init

lcd_init(MAIN_LCD, DRV_MAINLCD_INIT_COLOR);

12. lcd_if.c

void lcd_init(kal_uint8 lcd_id, kal_uint16 background_color)

//This function is used to initialize the LCD interface and LCD module

13. drv_lcd_chip.c

VOID Init_DI(UINT32 background, VOID** unused)

{

mci_LcdInit(background);

}

14. mci_lcd.c

VOID mci_LcdInit(UINT32 background)

{

static VOLATILE BOOL visitFlag = 0;

UINT32 status = hal_SysEnterCriticalSection();

if (!visitFlag)

{

visitFlag = 1;

g_mciLcdBypassFunction=NULL;

hal_SysExitCriticalSection(status);

MCI_TRACE(MCI_LCD_TRC_LVL,0,"mci_LcdInit");

lcdd_Open();

lcdd_GetScreenInfo(&g_mciLcdScreenInfo);

mci_LcdClearScreen(background);

}

else

{

hal_SysExitCriticalSection(status);

}

}

15. lcdd.c

/// Open the LCDD driver.

/// It must be called before any call to any other function of this driver.

/// This function is to be called only once.

PUBLIC LCDD_ERR_T lcdd_Open(VOID)

{

LCDD_ERR_T ret = LCDD_ERR_NO;

// Allow access to other LCD functions

if ( lcdd_LoadDrv())

{

if ( g_lcddDrv->lcdd_Open != NULL)

{

lcdd_SetBrightness(0);

ret = g_lcddDrv->lcdd_Open();

if (ret == LCDD_ERR_NO)

{

// Allow access

g_lcddLock = 1;

}

}

}

else

{

LCDD_TRACE(LCDD_INFO_TRC, 0, "Lcdd load error");

}

//if not find lcdd ,must return LCDD_ERR_NO for produce

g_lcddOpened = TRUE;

return ret;

}

做了两件重要的事情

15.1

lcdd_LoadDrv

g_lcddDrv->lcdd_Open()

16. 以 ili9163c 为例：

drv_lcd_ili9163c.c

PUBLIC BOOL lcdd_ili9163c_RegInit(LCDD_REG_T *pLcdDrv)

{

if( lcddp_CheckProductId())

{

pLcdDrv->lcdd_Open= lcddp_Open;

pLcdDrv->lcdd_Close=lcddp_Close;

pLcdDrv->lcdd_SetContrast=lcddp_SetContrast;

pLcdDrv->lcdd_SetStandbyMode=lcddp_SetStandbyMode;

pLcdDrv->lcdd_PartialOn=lcddp_PartialOn;

pLcdDrv->lcdd_PartialOff=lcddp_PartialOff;

pLcdDrv->lcdd_Blit16=lcddp_Blit16;

pLcdDrv->lcdd_Busy=lcddp_Busy;

pLcdDrv->lcdd_FillRect16=lcddp_FillRect16;

pLcdDrv->lcdd_GetScreenInfo=lcddp_GetScreenInfo;

pLcdDrv->lcdd_WakeUp=lcddp_WakeUp;

pLcdDrv->lcdd_SetPixel16=lcddp_SetPixel16;

pLcdDrv->lcdd_Sleep=lcddp_Sleep;

pLcdDrv->lcdd_SetDirRotation=lcddp_SetDirRotation;

pLcdDrv->lcdd_SetDirDefault=lcddp_SetDirDefault;

pLcdDrv->lcdd_GetStringId=lcdd_get_id_string;

return TRUE;

}

return FALSE;

}

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