一、 硬件
PXA270公有3个串口，分别是FFUART,BTUART和SUART。FFUART可以控制Modem, BTUART可以进行蓝牙通讯，SUART就只能进行一般的RS232通讯。
二、 软件
1 Eboot下的Debug口的实现
在PLATFORM\Mtct_smt_2700g\Src\Common\Dbgserial\ Dbgserial.c中修改如下：
VOID InitDebugSerial(UINT32 DbgSerPhysAddr)
{
UINT32 logMask = 0;
volatile BULVERDE_GPIO_REG *pGPIO_REGS = NULL;
volatile BULVERDE_CLKMGR_REG *pCLKMGR_REGS = NULL;
volatile i,j;
// At this moment we must suppress logging.
//
logMask = g_oalLogMask;
g_oalLogMask = 0;
g_pDebugUARTPort = (volatile BULVERDE_UART_REG *) OALPAtoVA(DbgSerPhysAddr, FALSE);
pGPIO_REGS = (volatile BULVERDE_GPIO_REG *) OALPAtoVA(BULVERDE_BASE_REG_PA_GPIO, FALSE);
pCLKMGR_REGS = (volatile BULVERDE_CLKMGR_REG *) OALPAtoVA(BULVERDE_BASE_REG_PA_CLKMGR, FALSE);
// Ensure that UART interrupts are turned off.
//
g_pDebugUARTPort->lcr = 0x0; // Clear DLAB.
g_pDebugUARTPort->ier_dlh = 0x0; // IER_DLH = 0x0.
// Set the Baud Rate (Divisor low = DEBUG_BAUD_38400).
// The divisor latches are at offsets 0 and 1, which are
// receive/transmit data and ier registers.
//
g_pDebugUARTPort->lcr = 0x80; // Access Divisor.
g_pDebugUARTPort->thr_rbr_dll = DEBUG_BAUD_115200; // Low byte divisor.
g_pDebugUARTPort->ier_dlh = 0x00; // High byte divisor.
g_pDebugUARTPort->lcr = 0x0; // Clear DLAB.
//Setting UART properties to 8N1
//
g_pDebugUARTPort->lcr = 0x3; // 8 bits, 1 stop, no parity. Also LCR DLAB bit = 0.
g_pDebugUARTPort->iir_fcr = 0x01; // Enable the FIFO.
g_pDebugUARTPort->iir_fcr = 0x07; // Clear Rx,Tx FIFOs.
// Don't enable UART interrupts - we'll poll for the data.
//
g_pDebugUARTPort->ier_dlh = 0x0;
// Ensure loop-back test mode is off even though MCR reset value is 0x0.
//
g_pDebugUARTPort->mcr = 0x0; // UART is in normal mode.
// Configure GPIO pins for FFUART
//
// if (DbgSerPhysAddr == BULVERDE_BASE_REG_PA_FFUART)
// {
//#define SMT
// // Initialize GPIO pins.
//#ifdef SMT
// GPIO99 FFTXD OUT 3
// GPIO102 FFRXD IN 3
// GPIO82 FFDTR OUT 3
// GPIO44 BTCTS IN 1
// GPIO41 FFRTS OUT 2
// GPIO37 FFDSR IN 1
// GPIO10 FFDCD IN 1
// GPIO89 FFRI IN 3
// Write 0 on GPIO pins 41, 82 and 99 before configuring them as outputs.
//
pGPIO_REGS->GPCR1 = 0x1u<<(41-32);
pGPIO_REGS->GPCR2 = 0x1u<<(82-64);
pGPIO_REGS->GPCR3 = 0x1u<<(99-96);
// Configure direction of GPIO pins 10, 37, 44, 89 and 102 as input
// and GPIO pins 41, 82 and 99 as output
//
pGPIO_REGS->GPDR0 &= ~(0x1u<<(10-0));
pGPIO_REGS->GPDR1 &= ~(0x1u<<(37-32));
pGPIO_REGS->GPDR1 &= ~(0x1u<<(44-32));
pGPIO_REGS->GPDR2 &= ~(0x1u<<(89-64));
pGPIO_REGS->GPDR3 &= ~(0x1u<<(102-96));
pGPIO_REGS->GPDR1 |= (0x1u<<(41-32));
pGPIO_REGS->GPDR2 |= (0x1u<<(82-64));
pGPIO_REGS->GPDR3 |= (0x1u<<(99-96));
// Configure GPIO pins 10, 37 and 44 for Alt_fn1.
// And pin 41 for Alt_fn2
// And pins 82,89,99 and 102 for Alt_fn3.
//
pGPIO_REGS->GAFR0_L &=~ (0x1u<<20);//(0x1u<<10)<<2;
pGPIO_REGS->GAFR1_L &=~ (0x1u<<10);//(0x1u<<(37-32))<<2;
pGPIO_REGS->GAFR1_L &=~ (0x1u<<24);//(0x1u<<(44-32))<<2;
pGPIO_REGS->GAFR1_L &=~ (0x2u<<18);//(0x2u<<(41-32))<<2;
pGPIO_REGS->GAFR2_U &=~ (0x3u<<4);//(0x3u<<(82-64-16))<<2;
pGPIO_REGS->GAFR2_U &=~ (0x3u<<18);//(0x3u<<(89-64-16))<<2;
pGPIO_REGS->GAFR3_L &=~ (0x3u<<6);//(0x3u<<(99-96))<<2;
pGPIO_REGS->GAFR3_L &=~ (0x3u<<12);//(0x3u<<(102-96))<<2;
pGPIO_REGS->GAFR0_L |= (0x1u<<20);//(0x1u<<10)<<2;
pGPIO_REGS->GAFR1_L |= (0x1u<<10);//(0x1u<<(37-32))<<2;
pGPIO_REGS->GAFR1_L |= (0x1u<<24);//(0x1u<<(44-32))<<2;
pGPIO_REGS->GAFR1_L |= (0x2u<<18);//(0x2u<<(41-32))<<2;
pGPIO_REGS->GAFR2_U |= (0x3u<<4);//(0x3u<<(82-64-16))<<2;
pGPIO_REGS->GAFR2_U |= (0x3u<<18);//(0x3u<<(89-64-16))<<2;
pGPIO_REGS->GAFR3_L |= (0x3u<<6);//(0x3u<<(99-96))<<2;
pGPIO_REGS->GAFR3_L |= (0x3u<<12);//(0x3u<<(102-96))<<2;
// Enable the FFUART clock.
//
pCLKMGR_REGS->cken |= XLLP_CLKEN_FFUART ;
// Enable the UART.
//
g_pDebugUARTPort->ier_dlh = 0x40;
// Restore the logging mask.
//
g_oalLogMask = logMask;
}
2 WinCE下调试口的实现
在PLATFORM\Mtct_smt_2700g\Src\Drivers\Serial\ms2_serial.cpp中修改
class CBulPdd16550FUART : public CBulPdd16550 {
public:
CBulPdd16550FUART (LPTSTR lpActivePath, PVOID pMdd, PHWOBJ pHwObj)
: CBulPdd16550 (lpActivePath,pMdd, pHwObj) { };
virtual BOOL Init() {
if (CBulPdd16550::Init() ) {
ConfigurePinout();
//Enable FFUART clock
m_pDCCLKReg->cken |= XLLP_CLKEN_FFUART ;
return TRUE;
}
else
return FALSE;
}
virtual void SerialRegisterRestore() {
ConfigurePinout();
CBulPdd16550::SerialRegisterRestore();
}
private:
BOOL ConfigurePinout(){
//Initialize GPIO pins
//2009-3-5 9:38
//modified by Bruce
// //Write 0 on GPIO pins 39, 40 and 41 before configuring them as outputs.
// m_pGPIOReg->GPCR1 = ( XLLP_GPIO_BIT_FFDTR | XLLP_GPIO_BIT_FFTXD | XLLP_GPIO_BIT_FFRTS );
//
// //Configure direction of GPIO pins 34, 35, 36, 37 and 38 as input
// //and GPIO pins 39, 40 and 41 as output
// m_pGPIOReg->GPDR1 &= ~( XLLP_GPIO_BIT_FFRXD | XLLP_GPIO_BIT_FFCTS |
// XLLP_GPIO_BIT_FFDCD | XLLP_GPIO_BIT_FFDSR |
// XLLP_GPIO_BIT_FFRI );
// m_pGPIOReg->GPDR1 |= ( XLLP_GPIO_BIT_FFTXD | XLLP_GPIO_BIT_FFDTR | XLLP_GPIO_BIT_FFRTS );
//
// //Configure GPIO pins 34, 35, 36, 37 and 38 for Alt_fn1. And pins 39, 40 and 41 for Alt_fn2.
// m_pGPIOReg->GAFR1_L |= (XLLP_GPIO_AF_BIT_FFRXD | XLLP_GPIO_AF_BIT_FFCTS |
// XLLP_GPIO_AF_BIT_FFDCD | XLLP_GPIO_AF_BIT_FFDSR |
// XLLP_GPIO_AF_BIT_FFRI | XLLP_GPIO_AF_BIT_FFTXD |
// XLLP_GPIO_AF_BIT_FFDTR | XLLP_GPIO_AF_BIT_FFRTS );
// Write 0 on GPIO pins 41, 82 and 99 before configuring them as outputs.
//
m_pGPIOReg->GPCR1 = 0x1u<<(41-32);
m_pGPIOReg->GPCR2 = 0x1u<<(82-64);
m_pGPIOReg->GPCR3 = 0x1u<<(99-96);
// Configure direction of GPIO pins 10, 37, 44, 89 and 102 as input
// and GPIO pins 41, 82 and 99 as output
//
m_pGPIOReg->GPDR0 &= ~(0x1u<<(10-0));
m_pGPIOReg->GPDR1 &= ~(0x1u<<(37-32));
m_pGPIOReg->GPDR1 &= ~(0x1u<<(44-32));
m_pGPIOReg->GPDR2 &= ~(0x1u<<(89-64));
m_pGPIOReg->GPDR3 &= ~(0x1u<<(102-96));
m_pGPIOReg->GPDR1 |= (0x1u<<(41-32));
m_pGPIOReg->GPDR2 |= (0x1u<<(82-64));
m_pGPIOReg->GPDR3 |= (0x1u<<(99-96));
// Configure GPIO pins 10, 37 and 44 for Alt_fn1.
// And pin 41 for Alt_fn2
// And pins 82,89,99 and 102 for Alt_fn3.
//
// pGPIO_REGS->GAFR0_L =0;
// pGPIO_REGS->GAFR1_L =0;
// pGPIO_REGS->GAFR2_L =0;
// pGPIO_REGS->GAFR3_L =0;
// pGPIO_REGS->GAFR0_U =0;
// pGPIO_REGS->GAFR1_U =0;
// pGPIO_REGS->GAFR2_U =0;
// pGPIO_REGS->GAFR3_U =0;
m_pGPIOReg->GAFR0_L &=~ (0x1u<<20);//(0x1u<<10)<<2;
m_pGPIOReg->GAFR1_L &=~ (0x1u<<10);//(0x1u<<(37-32))<<2;
m_pGPIOReg->GAFR1_L &=~ (0x1u<<24);//(0x1u<<(44-32))<<2;
m_pGPIOReg->GAFR1_L &=~ (0x2u<<18);//(0x2u<<(41-32))<<2;
m_pGPIOReg->GAFR2_U &=~ (0x3u<<4);//(0x3u<<(82-64-16))<<2;
m_pGPIOReg->GAFR2_U &=~ (0x3u<<18);//(0x3u<<(89-64-16))<<2;
m_pGPIOReg->GAFR3_L &=~ (0x3u<<6);//(0x3u<<(99-96))<<2;
m_pGPIOReg->GAFR3_L &=~ (0x3u<<12);//(0x3u<<(102-96))<<2;
m_pGPIOReg->GAFR0_L |= (0x1u<<20);//(0x1u<<10)<<2;
m_pGPIOReg->GAFR1_L |= (0x1u<<10);//(0x1u<<(37-32))<<2;
m_pGPIOReg->GAFR1_L |= (0x1u<<24);//(0x1u<<(44-32))<<2;
m_pGPIOReg->GAFR1_L |= (0x2u<<18);//(0x2u<<(41-32))<<2;
m_pGPIOReg->GAFR2_U |= (0x3u<<4);//(0x3u<<(82-64-16))<<2;
m_pGPIOReg->GAFR2_U |= (0x3u<<18);//(0x3u<<(89-64-16))<<2;
m_pGPIOReg->GAFR3_L |= (0x3u<<6);//(0x3u<<(99-96))<<2;
m_pGPIOReg->GAFR3_L |= (0x3u<<12);//(0x3u<<(102-96))<<2;
return TRUE;
}
}
3 WinCE下调试口转为可以被应用程序使用的普通串口
在PLATFORM\Mtct_smt_2700g\Src\Kernel\Oal\init.c中修改如下：
VOID OEMInitDebugSerial(void)
{
UINT32 *pDbgSerPhysAddr = (UINT32*) OALArgsQuery(BSP_ARGS_QUERY_DBGSERIAL);
return;
if (pDbgSerPhysAddr)
{
InitDebugSerial(*pDbgSerPhysAddr);
}
}
在platform.reg中修改为：
; -----------------------------------------------------------------------------
; @CESYSGEN IF CE_MODULES_SERIAL
IF BSP_NOSERIAL !
[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\SerialBT]
"Irq"=dword:15 ; 21 IRQ_BTUART
"SysIntr"=dword:1c ; 28 SYSINTR_BTUART
"MemBase"=dword:40200000 ; BTUART Register
"MemLen"=dword:40
"DeviceArrayIndex"=dword:81 ; BTUART object
"Prefix"="COM"
"IClass"="{CC5195AC-BA49-48a0-BE17-DF6D1B0173DD}"
"Dll"="ms2_serial.dll"
"Index"=dword:3 ;cqz
"Order"=dword:0
[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\SerialBT\Unimodem]
"Tsp"="Unimodem.dll"
"DeviceType"=dword:0
"FriendlyName"="COM3:";Serial Cable on COM1:
"DevConfig"=hex: 10,00, 00,00, 05,00,00,00, 10,01,00,00, 00,4B,00,00, 00,00, 08, 00, 00, 00,00,00,00
[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\SerialST]
"Dll"="ms2_serial.dll"
"Irq"=dword:15 ; 20 IRQ_STUART
"SysIntr"=dword:1d ; 29 SYSINTR_SFUART
"MemBase"=dword:40700000 ; STUART Register
"MemLen"=dword:40
"Prefix"="COM"
"Index"=dword:2 ;cqz 4
"Order"=dword:1
"DeviceArrayIndex"=dword:82 ; STUART object
"IClass"="{CC5195AC-BA49-48a0-BE17-DF6D1B0173DD}"
[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\Serial\Unimodem]
"Tsp"="Unimodem.dll"
"DeviceType"=dword:0
"FriendlyName"="COM2:" ;Serial Cable on COM4:
"DevConfig"=hex: 10,00, 00,00, 05,00,00,00, 10,01,00,00, 00,4B,00,00, 00,00, 08, 00, 00, 00,00,00,00
[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\SerialFT]
"Irq"=dword:15 ; 21 IRQ_FFUART
"SysIntr"=dword:1b ; 29 SYSINTR_FFUART
"MemBase"=dword:40100000 ; FFUART Register
"MemLen"=dword:40
"DeviceArrayIndex"=dword:80 ; FTUART object
"Prefix"="COM"
"IClass"="{CC5195AC-BA49-48a0-BE17-DF6D1B0173DD}"
"Dll"="ms2_serial.dll"
"Index"=dword:5
"Order"=dword:2
ENDIF BSP_NOSERIAL !
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