DSP芯片：TMS320F28377SPTPS文章来源：https://www.toymoban.com/news/detail-836284.html
基于已有的FPGA程序与板子，操作DSP读取FPGA内的数据。如果写入、读取成功，则点亮LED。文章来源地址https://www.toymoban.com/news/detail-836284.html
//
// Included Files
//
#include "F28x_Project.h"
#define TEST_PASS 0xABCDABCD
#define TEST_FAIL 0xDEADDEAD
#define ASRAM_CS2_START_ADDR 0x100000
#define ASRAM_CS2_SIZE 0x8000
#define EMIF1 0
#define EMIF2 1
#define MEM_D_WIDTH 1 // 16Bit Memory Interface
#define TURN_AROUND_TIME 0 // Turn Around time of 2 Emif Clock
#define RD_SETUP_TIME 0 // Read Setup time of 1 Emif Clock
#define RD_STROBE_TIME 3 // Read Strobe time of 4 Emif Clock
#define RD_HOLD_TIME 0 // Read Hold time of 1 Emif Clock
#define WR_SETUP_TIME 0 // Write Hold time of 1 Emif Clock
#define WR_STROBE_TIME 0 // Write Setup time of 1 Emif Clock
#define WR_HOLD_TIME 0 // Write Hold time of 1 Emif Clock
#define EXTEND_WAIT 0 // Disable Extended Wait
#define STROBE_SEL 0 // Disable Strobe Mode.
#define WAIT_POLAR_INV 0
#define WAIT_COUNT 0
//#define cpu_sel 0
//
// Globals
Uint16 ErrCount = 0;
Uint32 TEST_STATUS;
int i;
//
// EMIF引脚设置
//
extern void setup_emif1_pinmux_async_16bit(Uint16 cpu_sel)
{
GPIO_SetupPinMux(31,0,2);//第31个引脚，第1个CPU，第3个功能；写入使能
//GPIO_SetupPinMux(33,0,2);//DF_EMIF_RNW,未使用,外部存储器接口 1 读/不写
GPIO_SetupPinMux(35,0,2);//DF_EMIF_CSn片选信号
GPIO_SetupPinMux(37,0,2);// DF_EMIF_RDn读取使能
GPIO_SetupPinMux(91,0,0);//BA0，以普通IO作为BA0*
GPIO_SetupPinMux(92,0,3);//BA1,*
GPIO_SetupPinMux(93,0,0);//外部中断输出到DSP 32.5us一次
GPIO_SetupPinMux(62,0,0);//外部中断输出到DSP 32.5us一次
for (i=38; i<=52; i++)//a0 -a12
{
if ((i != 42) && (i != 43))
{
GPIO_SetupPinMux(i,cpu_sel,2);
}
}
GPIO_SetupPinMux(86,cpu_sel,2);//A13-A15
GPIO_SetupPinMux(87,cpu_sel,2);
GPIO_SetupPinMux(88,cpu_sel,2);
for (i=69; i<=85; i++)//D0 -D15
{
if (i != 84)
{
GPIO_SetupPinMux(i,cpu_sel,2);
}
}
for (i=69; i<=85; i++)
{
if (i != 84)
{
GPIO_SetupPinOptions(i,0,0x31); // GPIO_ASYNC||GPIO_PULLUP
}
}
}
//读取值
Uint16 Read_FPGA(long Read_ADD){
unsigned int Read_data = *((volatile unsigned int *)Read_ADD);
return(Read_data);
}
//写入值
void Write_FPGA(long Write_ADD,long Write_DATA)
{
*((volatile unsigned int *)Write_ADD)= Write_DATA;
}
//
// Main
//
void main(void)
{
//memcpy(&RamfuncsRunStart, &RamfuncsLoadStart, (size_t)&RamfuncsLoadSize);
InitGpio();
GPIO_SetupPinMux(34, GPIO_MUX_CPU1, 0);
GPIO_SetupPinOptions(34, GPIO_OUTPUT, GPIO_PUSHPULL);
GPIO_WritePin(34, 0);//D8L
//以上LED需要，D8=GPIO34，低电平亮
//
// Initialize system control
//
InitSysCtrl();
DINT;
//
// Initialize the PIE control registers to their default state.
// The default state is all PIE interrupts disabled and flags
// are cleared.
//将PIE控制寄存器初始化为其默认状态。
//默认状态是禁用所有PIE中断并清除标志。
// This function is found in the F2837xS_PieCtrl.c file.
//
InitPieCtrl();
//
// Disable CPU interrupts and clear all CPU interrupt flags:
//
EALLOW;
IER = 0x0000;
IFR = 0x0000;
EDIS;
//
// Initialize the PIE vector table with pointers to the shell Interrupt
// GService Routines (ISR).
// This will populate the entire table, even if the interrupt
// is not used in this example. This is useful for debug purposes.
// The shell ISR routines are found in F2837xS_DefaultIsr.c.
// This function is found in F2837xS_PieVect.c.
//
InitPieVectTable();
//
//Configure to run EMIF1 on full Rate (EMIF1CLK = CPU1SYSCLK)
//配置为以全速率运行EMIF1（EMIF1CLK=CPU1SYSCLK）
//
EALLOW;
ClkCfgRegs.PERCLKDIVSEL.bit.EMIF1CLKDIV = 0x1;//EMIF时钟配置，设置EM1模块运行速度
EDIS;
//
//Disable Access Protection (CPU_FETCH/CPU_WR/DMA_WR)
禁止EMIF1模块读写保护
EALLOW;
Emif1ConfigRegs.EMIF1ACCPROT0.all = 0x0;
if(Emif1ConfigRegs.EMIF1ACCPROT0.all != 0x0)
{
ErrCount++;
}
//
// Commit the configuration related to protection. Till this bit remains set
// content of EMIF1ACCPROT0 register can't be changed.
提交与保护相关的配置。在该位保留之前，EMIF1ACCPROT0寄存器的设置内容不能更改????
// 锁定寄存器配置
Emif1ConfigRegs.EMIF1COMMIT.all = 0x1;
if(Emif1ConfigRegs.EMIF1COMMIT.all != 0x1)
{
ErrCount++;
}
//
// Lock the configuration so that EMIF1COMMIT register can't be
// changed any more.
// 锁定寄存器配置
//
Emif1ConfigRegs.EMIF1LOCK.all = 0x1;
if(Emif1ConfigRegs.EMIF1LOCK.all != 1)
{
ErrCount++;
}
EDIS;
//
//配置cpu 0 的EMIF模块引脚
//
setup_emif1_pinmux_async_16bit(0);
//
//Configure the access timing for CS2 space配置CS2空间的访问定时
//根据实际引脚配置CS，这里是CS3
//
Emif1Regs.ASYNC_CS3_CR.all = (EMIF_ASYNC_ASIZE_16 | // 16Bit Memory
// Interface
EMIF_ASYNC_TA_2 | // Turn Around time
// of 2 Emif Clock
EMIF_ASYNC_RHOLD_1 | // Read Hold time
// of 1 Emif Clock
EMIF_ASYNC_RSTROBE_4 | // Read Strobe time
// of 4 Emif Clock
EMIF_ASYNC_RSETUP_1 | // Read Setup time
// of 1 Emif Clock
EMIF_ASYNC_WHOLD_1 | // Write Hold time
// of 1 Emif Clock
EMIF_ASYNC_WSTROBE_3 | // Write Strobe time
// of 1 Emif Clock
EMIF_ASYNC_WSETUP_1 | // Write Setup time
// of 1 Emif Clock
EMIF_ASYNC_EW_DISABLE | // Extended Wait
// Disable.
EMIF_ASYNC_SS_DISABLE // Strobe Select Mode
// Disable.
);
//地址===值，读写状态
//0x30_0106===0x5555,r
//0x30_0107===0xaaaa,r
//0x30_0115===0x0000,r&w
Write_FPGA(0x300115,4567);
Uint16 TEMP =Read_FPGA(0x300115);
if(TEMP==4567 && Read_FPGA(0x300106)==0x5555 && Read_FPGA(0x300107)==0xaaaa)
{
GPIO_WritePin(34, 0);//读写正常则led亮
}
else
{
GPIO_WritePin(34, 1);
}
while (1);
}
//
// End of file
//
到了这里，关于F28377S_EMIF_异步读写FPGA的文章就介绍完了。如果您还想了解更多内容，请在右上角搜索TOY模板网以前的文章或继续浏览下面的相关文章，希望大家以后多多支持TOY模板网！
