Texas Instruments TMS320x28xx 사용자 설명서
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Overview
Table 2-1. Submodule Configuration Parameters (continued)
Submodule
Configuration Parameter or Option
Event-trigger (ET)
•
Enable the ePWM events that will trigger an interrupt.
•
Enable ePWM events that will trigger an ADC start-of-conversion event.
•
Specify the rate at which events cause triggers (every occurrence or every second or third
occurrence)
occurrence)
•
Poll, set, or clear event flags
Code examples are provided in the remainder of this document that show how to implement various
ePWM module configurations. These examples use the constant definitions shown in
ePWM module configurations. These examples use the constant definitions shown in
. These
definitions are also used in the C280x C/C++ Header Files and Peripheral Examples (SPRC191).
Example 2-1. Constant Definitions Used in the Code Examples
// TBCTL (Time-Base Control)
// = = = = = = = = = = = = = = = = = = = = = = = = = =
// TBCTR MODE bits
#define
// = = = = = = = = = = = = = = = = = = = = = = = = = =
// TBCTR MODE bits
#define
TB_COUNT_UP
0x0
#define
TB_COUNT_DOWN
0x1
#define
TB_COUNT_UPDOWN
0x2
#define
TB_FREEZE
0x3
// PHSEN bit
#define
#define
TB_DISABLE
0x0
#define
TB_ENABLE
0x1
// PRDLD bit
#define
#define
TB_SHADOW
0x0
#define
TB_IMMEDIATE
0x1
// SYNCOSEL bits
#define
#define
TB_SYNC_IN
0x0
#define
TB_CTR_ZERO
0x1
#define
TB_CTR_CMPB
0x2
#define
TB_SYNC_DISABLE
0x3
// HSPCLKDIV and CLKDIV bits
#define
#define
TB_DIV1
0x0
#define
TB_DIV2
0x1
#define
TB_DIV4
0x2
// PHSDIR bit
#define
#define
TB_DOWN
0x0
#define
TB_UP
0x1
// CMPCTL (Compare Control)
// = = = = = = = = = = = = = = = = = = = = = = = = = =
// LOADAMODE and LOADBMODE bits
#define
// = = = = = = = = = = = = = = = = = = = = = = = = = =
// LOADAMODE and LOADBMODE bits
#define
CC_CTR_ZERO
0x0
#define
CC_CTR_PRD
0x1
#define
CC_CTR_ZERO_PRD
0x2
#define
CC_LD_DISABLE
0x3
// SHDWAMODE and SHDWBMODE bits
#define
#define
CC_SHADOW
0x0
#define
CC_IMMEDIATE
0x1
// AQCTLA and AQCTLB (Action-qualifier Control)
// = = = = = = = = = = = = = = = = = = = = = = = = = =
// ZRO, PRD, CAU, CAD, CBU, CBD bits
#define
// = = = = = = = = = = = = = = = = = = = = = = = = = =
// ZRO, PRD, CAU, CAD, CBU, CBD bits
#define
AQ_NO_ACTION
0x0
#define
AQ_CLEAR
0x1
#define
AQ_SET
0x2
#define
AQ_TOGGLE
0x3
// DBCTL (Dead-Band Control)
// = = = = = = = = = = = = = = = = = = = = = = = = = =
// MODE bits
#define
// = = = = = = = = = = = = = = = = = = = = = = = = = =
// MODE bits
#define
DB_DISABLE
0x0
#define
DBA_ENABLE
0x1
#define
DBB_ENABLE
0x2
#define DB_FULL_ENABLE 0x3
// POLSEL bits
#define
// POLSEL bits
#define
DB_ACTV_HI
0x0
#define
DB_ACTV_LOC
0x1
#define
DB_ACTV_HIC
0x2
SPRU791D – November 2004 – Revised October 2007
ePWM Submodules
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