【文章內(nèi)容簡介】 INT10 INT9 8 9 10 11 12 13 14 15 INT8 INT7 INT6 INT5 INT4 INT3 INT2 INT1 0 1 2 3 4 5 6 7 使能 : Set IER Bit = 1 禁止 : Clear IER Bit = 0 ? DINT/EINT，禁止中斷 ? 復位清零 /*** Interrupt Enable Register ***/ extern cregister volatile unsigned int IER。 IER |= 0x0008。 //enable INT4 in IER IER amp。= 0xFFF7。 //disable INT4 in IER 中斷全局使能 ? INTM用來做全局的使能 /禁止中斷 : ?使能 : INTM = 0 ?禁止 : INTM = 1 (reset value) ? INTM只能被匯編語言修改 : INTM ST1 Bit 0 /*** Global Interrupts ***/ asm(“ CLRC INTM”)。 //enable global interrupts asm(“ SETC INTM”)。 //disable global interrupts Peripheral Interrupt Expansion PIE Peripheral Interrupts 12x8 = 96 IFR IER INTM 28x Core 28x Core Interrupt logic PIE module for 96 Interrupts interrupt group interrupt group interrupt group interrupt group interrupt group interrupt group interrupt group interrupt group interrupt group interrupt group interrupt group interrupt group INT1 – INT 12 12 Interrupts 96 1 0 1 ? ? ? ? ? ? INT1 PIEIFR1 PIEIER1 Interrupt Group 1 INT13 (TINT1 / XINT13) INT14 (TINT2) NMI PIE 寄存器 0 1 2 3 4 5 6 7 15 8 reserved PIEIFRx register (x = 1 to 12) 0 1 2 3 4 5 6 7 15 8 reserved PIEIERx register (x = 1 to 12) reserved PIEACKx PIE Interrupt Acknowledge Register (PIEACK) 1 2 4 3 5 6 7 8 9 0 10 11 15 12 ENPIE PIEVECT PIECTRL register 0 15 1 include “” = 1。 //manually set IFR for XINT1 in PIE group 1 = 1。 //enable CAPINT1 in PIE group 3 = 0x0004。 //acknowledge the PIE group 3 = 1。 //enable the PIE Prio Vector Offset 復位時默認中斷向量表 Memory 0 BROM Vectors 64 W 0x3F FFC0 0x3F FFFF PIE Vectors 256 W 0x00 0D00 4 2 3 DlogInt RtosInt EmuInt NMI 02 04 06 08 0A 0C 0E 10 12 14 16 18 1A 1C 1E 20 22 24 26 283E Illegal User 112 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Int 1 Int 2 Int 3 Int 4 Int 5 Int 6 Int 7 Int 8 Int 9 Int 10 Int 11 Int 12 Int 13 Int 14 1 Reset 00 Default Vector Table Remapped when ENPIE = 1 PIE vector generated by config Tool Used to initialize PIE vectors PIE Vector Mapping (ENPIE = 1) ? CPU vectors are remapped to 0x00 0D00 in Data space ? PIE vector space 0x00 0D00 – 256 Word memory in Data space INT13 0x00 0D1A XINT1 Interrupt Vector INT14 0x00 0D1C Timer2 – RTOS Vector Datalog 0x00 0D1D Data logging vector …… …… …… USER11 0x00 0D3E User defined TRAP 0x00 0D40 interrupt vector …… …… …… …… …… …… 0x00 0DF0 interrupt vector 0x00 0D4E interrupt vector 0x00 0DFE interrupt vector …… …… …… PIE vector address PIE vector Description Not used 0x00 0D00 Reset Vector Never Fetched Here Vector name INT1 0x00 0D02 INT1 remapped below …… …… …… remapped below INT12 0x00 0D18 INT12 remapped below ? RESET and INT1INT12 vector locations are Remapped F2812/10 PIE Interrupt Assignment Table INT1 WAKEINT TINT0 ADCINT XINT2 XINT1 PDPINTB PDPINTA INT2 T1OFINT T1UFINT T1CINT T1PINT CMP3INT CMP2INT CMP1INT INT3 CAPINT3 CAPINT2 CAPINT1 T2OFINT T2UFINT T2CINT T2PINT INT4 T3OFINT T3UFINT T3CINT T3PINT CMP6INT CMP5INT CMP4INT INT5 CAPINT6 CAPINT5 CAPINT4 T4OFINT T4UFINT T4CINT T4PINT INT6 MXINT MRINT SPITXINTA SPIRXINTA INT7 INT8 INT9 SCITXINTB SCIRXINTB SCITXINTA SCIRXINTA INT10 INT11 INT12 ECAN0INT ECAN1INT Device Vector Mapping Summary _c_int00: . . . CALL main() main() { initialization()。 . . . } Initialization ( ) { EALLOW Load PIE Vectors Enable the PIEIER Enable PIECTRL Enable Core IER Enable INTM EDIS } PIE Vector Table 256 Word RAM 0x00 0D00 – 0DFF RESET Reset Vector 0x3F FFCO = BootROM Code Flash Entry Point 0x3F 7FF6 = LB _c_int00 User Code Start _c_int00 MPNMC = 0 (onchip ROM memory) Reset Vector 0x3F FFCO = _c_int00 User Code Start _c_int00 MPNMC = 1 (external memory XINTF) 中斷響應過程 CPU 動作 描述 T ST0 AH AL PH PL AR1 AR0 DP ST1 DBSTAT IER PC(msw) PC(lsw) 寄存器 PUSH 堆棧 14 個寄存器被自動保存（ ..） 0 ? IFR (bit) 請 IFR位 0 ? IER (bit) 清 IER位 1 ? INTM/DBGM 禁止全局中斷 /Debug 事件 Vector ? PC 加載中斷向量表給 PC指針 Clear other status bits 清 LOOP, EALLOW, IDLESTAT 第四部分： C2020 內(nèi)存映射 /BOOTROM TMS320F2812 內(nèi)存映射 MO SARAM (1K) M1 SARAM (1K) LO SARAM (4K) L1 SARAM (4K) HO SARAM (8K) Boot ROM (4K) MP/MC=0 BROM vector (32) MP/MC=0 ENPIE=0 OTP (1K) FLASH (128K) reserved reserved reserved PF 0 (2K) reserved reserved PF 1 (4K) reserved PF 2 (4K) reserved PIE vector (256) ENPIE=1 XINT Zone 0 (8K) XINT Zone 1 (8K) XINT Zone 2 () XINT Zone 6 () XINT Zone 7 (16K) MP/MC=1 XINT VectorRAM (32) MP/MC=1 ENPIE=0 reserved reserved reserved 數(shù)據(jù) | 程序 0x00 0000 0x00 0400 0x00 0800 0x00 0D00 0x00 1000 0x00 6000 0x00 7000 0x00 8000 0x00 9000 0x00 A000 0x3D 7800 0x3D 8000 0x3F 8000 0x3F A000 0x3F F000 0x3F FFC0 0x3F C000 0x18 0000 0x10 0000 0x08 0000 0x00 4000 0x00 2020 數(shù)據(jù) | 程序 128Bit Password reserved 0x3D 7C00 TMS320F2812片內(nèi) ROM MAP 段地址 0x3F F000 – 0x3F F501 0x3F F502 – 0x3F F711 0x3F F712 – 0x3F F833 0x3F F834 – 0x3F F9E7 0x3F F9E8 – 0x3F FB4F 0x3F FB50 – 0x3F FBFF 0x3F FC00 – 0x3F FFBF 0x3F FFC0 – 0x3F