-
//DSP28377 利用EMIF控制網口DM9000芯片收發數據
//--------------------------------------------------------------------------------------------
-
#include "F28x_Project.h"
#include "string.h"
void Emif1Initialize(void);
//emif 映射地址
#define ASRAM_CS3_START_ADDR 0x37FFF0
#define ASRAM_CS3_SIZE 0x8000
interrupt void xint1_isr(void);
extern void setup_emif1_pinmux_async_16bit(Uint16);
#pragma DATA_SECTION(datafrompc , "RAMGS0");
Uint16 datafrompc[12288];
Uint16 *ADDR_POINT = (Uint16 *)(ASRAM_CS3_START_ADDR);
Uint16 *DATA_POINT
= (Uint16
*)(ASRAM_CS3_START_ADDR
+ 1);
#define DM_NCR 0X00
#define DM_NSR 0X01
#define DM_TCR 0X02
#define DM_RCR 0X05
#define DM_BPTR 0X08
#define DM_FCTR 0X09
#define DM_RTFCR 0X0A
#define DM_EPCR 0X0B
#define DM_EPAR 0X0C
#define DM_EPDRL 0X0D
#define DM_EPDRH 0X0E
#define DM_PAB0 0X10
#define DM_PAB1 0X11
#define DM_PAB2 0X12
#define DM_PAB3 0X13
#define DM_PAB4 0X14
#define DM_PAB5 0X15
#define DM_GPCR 0X1E
#define DM_GPR 0X1F
#define DM_SMCR 0X2F
#define DM_MRCMDX 0XF0
#define DM_MRCMD 0XF2
#define DM_MWCMD 0XF8
#define DM_TXPLH 0XFD
#define DM_TXPLL 0XFC
#define DM_ISR 0XFE
#define DM_IMR 0XFF
#define PHY_BADDR 0X40
#define PHY_WCMD 0X0A
#define PHY_RCMD 0X0C
Uint16 NODE_ADDR[6] = {0X5A , 0X5A , 0X5A , 0X5A , 0X5A , 0X5A};
Uint16 PHYIntFlag = 0;
Uint16 RxReady = 0;
Uint16 SweepMode = 0;
Uint16 Index[24] = {0 , 512 , 1024 , 1536 , 2048 , 2560 , 3072 , 3584 , 4096 , 4608 , 5120 ,
5632 , 6144 , 6656 ,
7168 , 7680 , 8192 , 8704 , 9216 , 9728 , 10240 , 10752 ,
11264 ,11776};
//檢測到PHY中斷信號並觸發中斷 ---------------------------------------------------------------
interrupt void xint1_isr(void)
{
GpioDataRegs.GPBCLEAR.all = 0x4; // GPIO34 is low
// Acknowledge this interrupt to get more from group 1
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
PHYIntFlag = 1;
}
// 向DM9000內部寄存器寫值
void iow(Uint16 IOADDR , Uint16 REGDARA){
*ADDR_POINT = IOADDR;
DELAY_US(20);
*DATA_POINT = REGDARA;
DELAY_US(20);
}
// 讀取DM9000內部寄存器的值
Uint16 ior(Uint16 IOADDR){
DELAY_US(20);
*ADDR_POINT = IOADDR;
DELAY_US(20);
return(*DATA_POINT);
}
// 往固定地址寫值
void outw(Uint16 REGDATA , Uint16 addr_data_type){
if(addr_data_type == 1) *DATA_POINT = REGDATA;
else if(addr_data_type == 2) *ADDR_POINT = REGDATA;
DELAY_US(50);
}
//讀取DM9000當前地址值
Uint16 inw(){
return *DATA_POINT;
}
//寫物理接口PHY寄存器的值
void phy_write(Uint16 offset , Uint16 REGIN){
iow(DM_EPAR , (offset | PHY_BADDR));
iow(DM_EPDRH , (REGIN >> 8) & 0x00ff);
iow(DM_EPDRL , (REGIN & 0x00ff));
iow(DM_EPCR , PHY_WCMD);
while((ior(DM_EPCR) & 1));
DELAY_US(200);
iow(DM_EPCR , 0x08);
}
//讀物理接口PHY寄存器的值
Uint16 phy_reaad(Uint16 offset , Uint16 REGIN){
Uint16 returndata=0;
iow(DM_EPAR , (offset | PHY_BADDR));
iow(DM_EPCR , PHY_RCMD);
while((ior(DM_EPCR) & 1));
DELAY_US(200);
iow(DM_EPCR , 0x08);
returndata = ior(DM_EPDRH);
returndata = (returndata << 8) | ior(DM_EPDRL);
return returndata;
}
//DM9000 初始化
void DM9000_INIT(){
//開啓PHY
iow(DM_GPR , 0X00);
//softerware reset and setting as normal mode(TWICE)
iow(DM_NCR , 0X01);
DELAY_US(10000);
iow(DM_NCR , 0X00);
iow(DM_NCR , 0X01);
DELAY_US(10000);
iow(DM_NCR , 0X00);
//clear the RX/TX flag
iow(DM_NSR, 0x2C);
iow(DM_ISR, 0x3F);
// //write the NODE_ADDR to physical register
iow(DM_PAB0 , NODE_ADDR[0]);
iow(DM_PAB1 , NODE_ADDR[1]);
iow(DM_PAB2 , NODE_ADDR[2]);
iow(DM_PAB3 , NODE_ADDR[3]);
iow(DM_PAB4 , NODE_ADDR[4]);
iow(DM_PAB5 , NODE_ADDR[5]);
//Eenable RX/TX function
iow(DM_RCR , 0x31);//去掉混雜模式//iow(DM_RCR , 0x31);
iow(DM_TCR , 0x00);
//setting phy of dm9000
phy_write(0x00 , 0x8000);
DELAY_US(100000);
phy_write(0x04 , 0x01e1 | 0x0400);
DELAY_US(100000);
//set back presure threshold register
iow(DM_BPTR , 0x3F);
iow(DM_FCTR , 0x3A);
iow(DM_RTFCR , 0xFF);
iow(DM_SMCR , 0x00);
//clear all flags agin
iow(DM_NSR, 0x2C);
iow(DM_ISR, 0x3B);
//open the rx interrupt
iow(DM_IMR , 0x81);
DELAY_US(1000);
}
//發送網絡包
void PACKE_SEND(Uint16 *datain , Uint16 datalen){
Uint16 i = 0;
Uint16 len=0;
//關閉RX中斷
iow(DM_IMR , 0x80);
//write length to internal sram
//將包的長度寫入到寄存器中；
len = datalen * 2;
iow(DM_TXPLH , ((len&0xff00)>>8));
iow(DM_TXPLL , len&0x00ff);
//DM_MWCMD is pointer to internal TX sdram address
outw(DM_MWCMD , 2);
//write data int internal sram
for(i = 0; i < datalen ; i++) outw(datain[i] , 1);
//start transmit
iow(DM_TCR , 0X01);
// wait transmit complit
while((ior(DM_NSR) & 0x0c) == 0);
DELAY_US(20);
//clear the tx flag
iow(DM_NSR , 0X2C);
//oprn rx intterupt
iow(DM_IMR , 0x81);
}
//----------------------------------------------------------------------------------------
//接受網絡包//在調試的過程中；通過一片DSP發送1040個數據（8bit）；並設置發送長度爲1040；但對於接受的網絡包
而言；不僅僅會在接收到的網絡包前包含4個
//信息byte；分別是接受準備；接受狀態位；幀長度（2byte）；後面跟隨1040個數據（byte）；後面還會
跟隨4個byte位；作用不知；同時接受到的
//幀長度爲1044個；所以在讀取數據是必須讀取完成整個1044個數據；rx指針纔會自動跳轉到SRAM的首地址
等待下一次觸發
//數據包後面還跟隨了2個word的校驗位
void PACKE_RECIVE(Uint16 *datain , Uint16 *data_ready , Uint16 *Type_mode){
Uint16 i = 0;
Uint16 rx_length = 0;
Uint16 state = 0;
Uint16 ready = 0;
Uint16 phy_addr[6];
Uint16 mode_typ = 0;
Uint16 cnt = 0;
//獲取中斷標識
state = ior(DM_ISR);
if(state & 0x01){
//清除中斷標誌
iow(DM_ISR , 0x01);
//將rx指針指向SRAM(此指針的指向方式爲讀取數據後指針不會自動增加)
ready = ior(DM_MRCMDX);
DELAY_US(200);
//在讀取一次狀態寄存器
ready = ior(DM_MRCMDX);
//取狀態寄存器的低8位
ready = ready & 0X00FF;
if(ready == 0x01){
//將rx指針指向SRAM(此指針的指向方式爲讀取數據後指針會自動增加)
outw(DM_MRCMD , 2);
//讀取狀態信息
rx_length = inw();
//讀取幀字節數
rx_length = inw();
phy_addr[0] = inw();phy_addr[1] = inw();phy_addr[2] = inw();
phy_addr[3] = inw();phy_addr[4] = inw();phy_addr[5] = inw();
mode_typ = inw();
cnt = inw();
rx_length = (rx_length - 16)/2;
for(i=0;i<rx_length;i++){
*(datain + i + Index[cnt]) = inw();
}
if(cnt == 23){
*data_ready = 1;
*Type_mode = mode_typ;
}
}
else if(ready == 0x00)
{
iow(DM_IMR , 0x80);
iow(DM_ISR , 0x0F);
iow(DM_RCR , 0x00);
iow(DM_NCR , 0x01);
DELAY_US(20);
iow(DM_NSR, 0x2C);
iow(DM_ISR, 0x80);
iow(DM_RCR, 0x39);
}
}
iow(DM_ISR , 0x01);
iow(DM_IMR , 0x81);
}
//emif 設置
void emifsetting()
{
Emif1Initialize();
//Configure to run EMIF1 on full Rate (EMIF1CLK = CPU1SYSCLK)
EALLOW;
ClkCfgRegs.PERCLKDIVSEL.bit.EMIF1CLKDIV = 0x1;
EDIS;
EALLOW;
//Grab EMIF1 For CPU1
Emif1ConfigRegs.EMIF1MSEL.all = 0x93A5CE71;
//Disable Access Protection (CPU_FETCH/CPU_WR/DMA_WR)
Emif1ConfigRegs.EMIF1ACCPROT0.all = 0x0;
if (Emif1ConfigRegs.EMIF1ACCPROT0.all != 0x0)
{
while(1);
}
// Commit the configuration related to protection. Till this bit remains set
// content of EMIF1ACCPROT0 register can't be changed.
Emif1ConfigRegs.EMIF1COMMIT.all = 0x1;
if(Emif1ConfigRegs.EMIF1COMMIT.all != 0x1)
{
while(1);
}
// Lock the configuration so that EMIF1COMMIT register can't be changed any more.
Emif1ConfigRegs.EMIF1LOCK.all = 0x1;
if (Emif1ConfigRegs.EMIF1LOCK.all != 1)
{
while(1);
}
//
EDIS;
//
// //Configure GPIO pins for EMIF1
setup_emif1_pinmux_async_16bit(0);
//
// //Configure the access timing for CS2 space
//net
Emif1Regs.ASYNC_CS3_CR.all = ( EMIF_ASYNC_ASIZE_16 | // 16Bit Memory Interface
EMIF_ASYNC_TA_3 |
EMIF_ASYNC_RHOLD_1 |
EMIF_ASYNC_RSTROBE_5 |
EMIF_ASYNC_RSETUP_1 |
EMIF_ASYNC_WHOLD_1 |
EMIF_ASYNC_WSTROBE_2 |
EMIF_ASYNC_WSETUP_1 |
EMIF_ASYNC_EW_DISABLE |
EMIF_ASYNC_SS_DISABLE
);
}
//GPIO中斷觸發設置
void GPIOINTsetting(){
//設置中斷觸發組1
EALLOW; // This is needed to write to EALLOW protected registers
PieVectTable.XINT1_INT = &xint1_isr;
EDIS; // This is needed to disable write to EALLOW protected registers
PieCtrlRegs.PIECTRL.bit.ENPIE = 1; // Enable the PIE block
PieCtrlRegs.PIEIER1.bit.INTx4 = 1; // Enable PIE Group 1 INT4
PieCtrlRegs.PIEIER1.bit.INTx5 = 1; // Enable PIE Group 1 INT5
IER |= M_INT1; // Enable CPU INT1
EINT;
//出發源爲外部引腳GPIO55，此引腳鏈接至DM9000的中斷引腳
EALLOW;
GpioCtrlRegs.GPBMUX2.bit.GPIO55 = 0; // GPIO
GpioCtrlRegs.GPBDIR.bit.GPIO55 = 0; // input
GpioCtrlRegs.GPBQSEL2.bit.GPIO55 = 0;
EDIS;
GPIO_SetupXINT1Gpio(55);
//設置引腳上升沿出發中斷
XintRegs.XINT1CR.bit.POLARITY = 1; // Falling edge interrupt
XintRegs.XINT1CR.bit.ENABLE = 1; // Enable XINT1
}
// 主函數
void main(void)
{
Uint16 i = 0;
InitSysCtrl();
DINT;
InitPieCtrl();
EALLOW;
IER = 0x0000;
IFR = 0x0000;
EDIS;
InitPieVectTable();
GPIOINTsetting();
emifsetting();
DM9000_INIT();
DELAY_US(500000);
//********************************************************************
//接受數據測試段代碼
//******************************************************************
while(1){
if(PHYIntFlag == 1){
PHYIntFlag = 0;
PACKE_RECIVE(&datafrompc[0] , &RxReady , &SweepMode);
if(RxReady == 1){
RxReady = 0;
//過程處理
ESTOP0;
memset(&datafrompc[0] , 0 , 12288);
}
}
}
//*************************************************************************
//發送數據測試段代碼
//*************************************************************************
// databuffer[0] = 0xFFFF; databuffer[1] = 0xFFFF; databuffer[2] = 0xFFFF;
// databuffer[3] = 0x285B; databuffer[4] = 0xC92D; databuffer[5] = 0x587D;
// databuffer[6] = 0X00;databuffer[7]=0X00;
//
// for(i = 0 ; i< 512 ; i++){
// databuffer[i+8] = i;
// }
//
// while(1){
// PACKE_SEND(&databuffer[0] , buffersize);
//
// DELAY_US(1000);
// }
}