www.deyisupport.com/.../249121.aspx
上面的链接是公司DM368换了不同大小不同厂商内存后，不能运行系统的问题，判断是换了内存厂商后，内存参数需要重新配置的问题。
根据下面的链接中：
www.deyisupport.com/.../69143.aspx
某位TI员工生成的“2047.DM368_mDDR_DDR2_Memory_Controller_Register_Calc.xlsx”来计算的寄存器值，但是编译UBL后烧写到板子，运行到：
DM36x initialization passed!
TI UBL Version: 1.50
Booting Catalog Boot Loader
BootMode = NAND
Starting NAND Copy...
停止了。不知道是什么问题，自己初步判断，还是DDR参数配置的问题。我在psp/flash-utils/DM36x/Common/src/device.c中改的DEVICE_DDR2Init()函数代码如下：
Uint32 DEVICE_DDR2Init()
{
Uint32 tRFC, tRP, tRCD, tWR, tRAS, tRC, tRRD, tWTR;
DEVICE_LPSCTransition(LPSC_DDR2, 0, PSC_ENABLE);
SYSTEM->VTPIOCR = (SYSTEM->VTPIOCR) & 0xFFFF9F3F;
// Set bit CLRZ (bit 13)
SYSTEM->VTPIOCR = (SYSTEM->VTPIOCR) | 0x00002000;
// Check VTP READY Status
while( !(SYSTEM->VTPIOCR & 0x8000));
// Set bit VTP_IOPWRDWN bit 14 for DDR input buffers)
// SYSTEM->VTPIOCR = SYSTEM->VTPIOCR | 0x00004000;
// Set bit LOCK(bit7) and PWRSAVE (bit8)
SYSTEM->VTPIOCR = SYSTEM->VTPIOCR | 0x00000080;
// Powerdown VTP as it is locked (bit 6)
// Set bit VTP_IOPWRDWN bit 14 for DDR input buffers)
SYSTEM->VTPIOCR = SYSTEM->VTPIOCR | 0x00004040;
// Wait for calibration to complete
UTIL_waitLoop( 150 );
// Set the DDR2 to synreset, then enable it again
DEVICE_LPSCTransition(LPSC_DDR2, 0, PSC_SYNCRESET);
DEVICE_LPSCTransition(LPSC_DDR2, 0, PSC_ENABLE);
DDR->DDRPHYCR = 0x000000C6; // qing, 0x000000C5 to 0x000000C6
DDR->SDBCR = 0x00574832; // qing, 0x00534832 to 0x00574A30
DDR->SDBCR = 0x0057C832; // qing, 0x0053C832 to 0x0057CA30; Set the TIMUNLOCK to write into the TMR reg
/*
tRFC = DDR_Get_Val(DDR_T_RFC, DDR_FREQ);
tRP = DDR_Get_Val(DDR_T_RP, DDR_FREQ);
tRCD = DDR_Get_Val(DDR_T_RCD, DDR_FREQ);
tWR = DDR_Get_Val(DDR_T_WR, DDR_FREQ);
tRAS = DDR_Get_Val(DDR_T_RAS, DDR_FREQ);
tRC = DDR_Get_Val(DDR_T_RC, DDR_FREQ);
tRRD = DDR_Get_Val(DDR_T_RRD, DDR_FREQ);
tWTR = DDR_Get_Val(DDR_T_WTR, DDR_FREQ);
DDR->SDTIMR = tRFC << 25 |
tRP << 22 |
tRCD << 19 |
tWR << 16 |
tRAS << 11 |
tRC << 6 |
tRRD << 3 |
tWTR << 0;
DDR->SDTIMR2 = ((DDR_T_RASMAX / (DDR_RR * DDR_FREQ)) << 27) |
(DDR_T_XP << 25 ) |
(((DDR_T_XSNR * DDR_FREQ) / 10000) << 16) |
(DDR_T_XSRD << 8) |
(((DDR_T_RTP * DDR_FREQ) / 10000) << 5) |
(DDR_T_CKE << 0);
*/
DDR->SDTIMR = 0x33256C88; // qing
DDR->SDTIMR2 = 0x7C1CC742; // qing
DDR->SDBCR = 0x00574832; // qing, 0x00534832 to 0x00574832; Reset the TIMUNLOCK TMR Write Disable
DDR->PBBPR = 0x000000FE; //
DDR->SDBCR = 0x00D74A32; // qing, 0x00D34A32 to 0x00D74A32; Enable DDR2 and DDR and SDram. Write '1' to BOOTUNLOCK
DDR->SDBCR = 0x00574A32; // qing, 0x00534A32 to 0x00574A32; Enable DDR2 and DDR and SDram. Write '0' to BOOTUNLOCK
DDR->SDRCR = 1326; // qing, (DDR_RR * DDR_FREQ) / 10 to 1326; Program SDRAM Refresh Control Registers
DEVICE_LPSCTransition(LPSC_DDR2, 0, PSC_SYNCRESET);
DEVICE_LPSCTransition(LPSC_DDR2, 0, PSC_ENABLE);
return E_PASS;
}
我在附件中附上镁光的DDR芯片手册，请高手帮我看看，我的参数哪里设置错误了！
