TI中文支持网Part Number:TMS320F28377D
使用的是EMIF1接口与FPGA IO口直连，PIN脚仅使用7地址位、16数据位、REN、CS2、CLK，在与FPGA通讯过程，FPGA与DSP芯片均会发热异常。
如果FPGA处理一下，在CS高(数据无效)期间，将FPGA的16个数据口置为高阻态，FPGA与DSP芯片都发热正常，如果在CS高(数据无效)期间，将FPGA的16个数据口置为低电平，FPGA与DSP芯片均会发热异常。
在整个交互过程，DSP只读取数据，理论下数据口都应该是输入模式的，为何改变下FPGA的IO口空闲状态发热就正常了呢？是不是哪里需要配置EMIF数据口空闲状态？
附上，EMIF配置及读取数据代码。
void InitEMIF(void)
{EALLOW;//// Grab EMIF1 For CPU1//Emif1ConfigRegs.EMIF1MSEL.all = 0x93A5CE71;////Disable Access Protection (CPU_FETCH/CPU_WR/DMA_WR)//Emif1ConfigRegs.EMIF1ACCPROT0.all = 0x0;//// Commit the configuration related to protection. Till this bit remains set// content of EMIF1ACCPROT0 register can't be changed.//Emif1ConfigRegs.EMIF1COMMIT.all = 0x1;//// Lock the configuration so that EMIF1COMMIT register can't be// changed any more.//Emif1ConfigRegs.EMIF1LOCK.all = 0x1;EDIS;////Configure GPIO pins for EMIF1//
//Uint16 i;
//for (i=28; i<=52; i++)
//{
//if ((i != 42) && (i != 43)&& (i != 28)&& (i != 43))
//{
//GPIO_SetupPinMux(i,0,2);
//}
//}
//for (i=63; i<=87; i++)
//{
//if (i != 84)
//{
//GPIO_SetupPinMux(i,0,2);
//}
//}GPIO_SetupPinMux(30,0,2);GPIO_SetupPinMux(34,0,2);GPIO_SetupPinMux(37,0,2);GPIO_SetupPinMux(38,0,2);GPIO_SetupPinMux(39,0,2);GPIO_SetupPinMux(40,0,2);GPIO_SetupPinMux(41,0,2);GPIO_SetupPinMux(44,0,2);GPIO_SetupPinMux(45,0,2);GPIO_SetupPinMux(46,0,2);GPIO_SetupPinMux(47,0,2);GPIO_SetupPinMux(69,0,2);GPIO_SetupPinMux(70,0,2);GPIO_SetupPinMux(71,0,2);GPIO_SetupPinMux(72,0,2);GPIO_SetupPinMux(73,0,2);GPIO_SetupPinMux(74,0,2);GPIO_SetupPinMux(75,0,2);GPIO_SetupPinMux(76,0,2);GPIO_SetupPinMux(77,0,2);GPIO_SetupPinMux(78,0,2);GPIO_SetupPinMux(79,0,2);GPIO_SetupPinMux(80,0,2);GPIO_SetupPinMux(81,0,2);GPIO_SetupPinMux(82,0,2);GPIO_SetupPinMux(83,0,2);GPIO_SetupPinMux(85,0,2);
//GPIO_SetupPinMux(88,0,3);
//GPIO_SetupPinMux(89,0,3);
//GPIO_SetupPinMux(90,0,3);
//GPIO_SetupPinMux(91,0,3);////setup async mode and enable pull-ups for Data pins//
//for (i=69; i<=85; i++)
//{
//if (i != 84)
//{
//GPIO_SetupPinOptions(i,0,0x31); // GPIO_ASYNC||GPIO_PULLUP
//}
//}GPIO_SetupPinOptions(69,0,0x31);GPIO_SetupPinOptions(70,0,0x31);GPIO_SetupPinOptions(71,0,0x31);GPIO_SetupPinOptions(72,0,0x31);GPIO_SetupPinOptions(73,0,0x31);GPIO_SetupPinOptions(74,0,0x31);GPIO_SetupPinOptions(75,0,0x31);GPIO_SetupPinOptions(76,0,0x31);GPIO_SetupPinOptions(77,0,0x31);GPIO_SetupPinOptions(78,0,0x31);GPIO_SetupPinOptions(79,0,0x31);GPIO_SetupPinOptions(80,0,0x31);GPIO_SetupPinOptions(81,0,0x31);GPIO_SetupPinOptions(82,0,0x31);GPIO_SetupPinOptions(83,0,0x31);GPIO_SetupPinOptions(85,0,0x31);////Configure the access timing for CS2 space//Emif1Regs.ASYNC_CS2_CR.all = ( EMIF_ASYNC_ASIZE_16| // 16Bit Memory// InterfaceEMIF_ASYNC_TA_1| // Turn Around time// of 2 Emif ClockEMIF_ASYNC_RHOLD_1| // Read Hold time// of 1 Emif ClockEMIF_ASYNC_RSTROBE_1| // Read Strobe time// of 1 Emif ClockEMIF_ASYNC_RSETUP_1| // Read Setup time// of 1 Emif ClockEMIF_ASYNC_WHOLD_1| // Write Hold time// of 1 Emif ClockEMIF_ASYNC_WSTROBE_1| // Write Strobe time// of 1 Emif ClockEMIF_ASYNC_WSETUP_1| // Write Setup time// of 1 Emif ClockEMIF_ASYNC_EW_DISABLE | // Extended Wait// Disable.EMIF_ASYNC_SS_DISABLE// Strobe Select Mode// Disable.);
}
#pragma DATA_SECTION(CpuToCla1ADCBuffer,"CpuToCla1MsgRAM");
volatile Uint32 CpuToCla1ADCBuffer[MEM_BUFFER_SIZE];
#define MEM_BUFFER_SIZE22Uint16 temp=0;Uint16 *dst;Uint16 *src;dst = (Uint16 *)CpuToCla1ADCBuffer;src = (Uint16 *)ASRAM_CS2_START_ADDR;for(temp=0;temp<MEM_BUFFER_SIZE*2;temp++){*dst++ = *src++;}
Alice：
您好，
与FPGA进行数据传输使用”Asynchronous Interface“接口模式，
可使用下面文档中”EMIF Configuration Tool“配置。
Design and Usage Guidelines for the C2000 External Memory Interface (EMIF) (Rev. A) (ti.com)
,
Eruroraito：
您好，
我使用的是”Asynchronous Interface“接口模式。
,
Alice：
您好，
如果数据传输过程都会发热的话，就是存在过流了。
MCU这边的接口设置和驱动，请参考 emif_ex1_16bit_asram (ti.com)。
