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$ }, n$ X% w& z 我们公司在OMAPL138_StarterWare_1_10_04_01的基础上( OMAPL138_StarterWare_1_10_04_01\examples\evmOMAPL138\usb_dev_msc),
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实现了usb mass storage功能,在win7系统下面u盘功能够顺利实际,但是在电脑上接一个hub后,然后将u盘接到hub上,u盘不能正解识别。
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, b* Y5 j1 H8 `9 J% H4 ^. X: Z 目前分析代码发现经hub转接后,电脑发(SCSI_READ_10 0x28)这个命令,usb 复位。
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UsbPhyOn 代码如下,外部时钟配为19.2M. device mode:
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请问个和我们的设备电流是否有关:' W$ `# T+ Z: ^% i1 c: }
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void UsbPhyOn(unsigned int ulIndex)9 j& `" I* i5 z* v- ^
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unsigned int reg = 0;
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* E3 c9 X2 \1 D# I reg = HWREG(g_USBInstance[ulIndex].uiPHYConfigRegAddr);
6 w( m9 U9 l& O: w7 Q reg &= ~(CFGCHIP2_REFFREQ);
8 `1 u3 [2 b" T4 z- J- U+ ~) I reg |= CFGCHIP2_REFFREQ_19_2MHZ;. [. a' J( l( K5 m) S! l! J, j0 j0 q
//reg |=CFGCHIP2_REFFREQ_24MHZ;
* X5 `/ q: ?+ u4 h HWREG(g_USBInstance[ulIndex].uiPHYConfigRegAddr)=reg;
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reg = HWREG(g_USBInstance[ulIndex].uiPHYConfigRegAddr);
. ~# x) I% I0 s& A" ]) R tprintf("\r\n clk==0x%08x:\r\n", reg &= (CFGCHIP2_REFFREQ));
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#if debug
8 e$ v3 Z- M0 Z5 Q8 Z8 m/ y. S/***internal 2.0***/ //aux_clk
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reg = HWREG(g_USBInstance[ulIndex].uiPHYConfigRegAddr);
9 t5 i% c7 q; E$ \* c D+ D reg &= ~(CFGCHIP2_USB2PHYCLKMUX);
- r! Y9 F- H5 u" J* M reg |= (CFGCHIP2_USB2PHYCLKMUX);1 A6 L- Q- `, B% w5 f9 e/ }4 F! t1 p
HWREG(g_USBInstance[ulIndex].uiPHYConfigRegAddr) = reg;' Q5 S" k0 ^$ K5 Z9 }
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reg = HWREG(g_USBInstance[ulIndex].uiPHYConfigRegAddr);
- a% t& W& J1 e' q3 o& A" C tprintf("\r\n 2.0clk source=0x%08x:\r\n", reg &= (CFGCHIP2_USB2PHYCLKMUX));
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- T5 `1 d& v! T- X/***internal 1.0***/ ///phy out2 t8 C, c4 j- s
$ G% K- \, T4 [# A& ` reg = HWREG(g_USBInstance[ulIndex].uiPHYConfigRegAddr);
U/ ~9 E6 H. k' c reg &= ~(CFGCHIP2_USB1PHYCLKMUX);0 g: k' x; b( r% s2 c' _" [: K
//reg |= (CFGCHIP2_USB1PHYCLKMUX);
# o4 I# G. W( c8 J HWREG(g_USBInstance[ulIndex].uiPHYConfigRegAddr) = reg;: W1 R' ~( g" M9 s- S6 k6 @
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reg = HWREG(g_USBInstance[ulIndex].uiPHYConfigRegAddr);
2 s/ R3 c$ n' I' @- q( N* { tprintf("\r\n 1.0clk source=0x%08x:\r\n", reg &= (CFGCHIP2_USB1PHYCLKMUX));
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/***phy run***/ //phy out
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+ V2 z8 ^5 t2 R t" p# [+ t reg = HWREG(g_USBInstance[ulIndex].uiPHYConfigRegAddr);! m$ }3 \7 _4 }
//tprintf("\r\n CFGCHIP2_PHYPWRDN=0x%08x:\r\n", reg &= (CFGCHIP2_PHYPWRDN));
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reg = HWREG(g_USBInstance[ulIndex].uiPHYConfigRegAddr);
$ `0 P! `' Q' e8 U; ^ ]3 d: J reg &= ~(CFGCHIP2_VBDTCTEN);
* }, u% ~+ l4 a2 V( b" a/ u. ~ reg |= (CFGCHIP2_VBDTCTEN);, M z( s6 ~4 ]0 k' Q, ?1 J3 `! J& L
tprintf("\r\n phy CFGCHIP2_VBDTCTEN=0x%08x:\r\n", reg &= (CFGCHIP2_VBDTCTEN)); C: R/ N- e% j+ Y" f
#endif" s% Y2 B- t ?1 ]' ~8 {# i
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reg = HWREG(g_USBInstance[ulIndex].uiPHYConfigRegAddr); % L* a+ r9 V0 @8 }- T; H
reg &= ~(CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN);
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/ j1 A4 K! J& E7 a/ } reg |= CFGCHIP2_PHY_PLLON;
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HWREG(g_USBInstance[ulIndex].uiPHYConfigRegAddr) = reg;
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while (!(HWREG(g_USBInstance[ulIndex].uiPHYConfigRegAddr) & CFGCHIP2_PHYCLKGD));
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//#ifdef USB_MODE_FULLSPEED/ F% }; u* H& W/ o% U6 {" i
HWREGB(USB0_BASE + USB_O_POWER) &= 0xdf;
9 A2 |. A1 @) O m//#endif /* USB_MODE_HS_DISABLE */
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tprintf("\r\n USB0_BASE + USB_O_POWER=0x%08x:\r\n", HWREG(USB0_BASE + USB_O_POWER));
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附件有我们的电路图:
$ h q0 o X% C% U& g+ Q1 w 请问能否帮助分析,谢谢.; u' M$ W9 C* {* D7 H+ [( U
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