Digital Signal Processing TMS 320 F 2812 By

Digital Signal Processing TMS 320 F 2812 �� By Mr. Rungwicha Chaiyot

TMS 320 F 2812 �� -Two event-manager modules (EVA, EVB) -Enhanced analog-to-digital converter (ADC) module -Digital I/O and shared pin function

GP Timer Counting Operation Compare output �� GP Timer �� active high, active low force high, force low �� GP Timer �� -Stop/Hold mode -Continuous Up-Counting mode -Directional Up-/Down-Counting mode -Continuous Up-/Down-Counting mode �� timer con (Tx. CON) �� 11 -12

Stop/Hold Mode �� GP Timer �� timer counter, compare output �� Continuous Up-Counting mode �� Period register�� GP Timer �� 0 �� 2 GP Timer

�� 2 GP Timer Continuous Up-Counting mode �� Continuous Up-Counting mod �� PWM �� Asynch GP Timer

�� 3 Directional Up-/Down-Counting mode �� powe GP Timer application

�� 4 Continuous Up-/Down-Counting mode �� PWM �� Symmetric �� period �� timer �� Period register (Tx. PR)

Asymmetric/Symmetric Waveform Generation �� counting mode �� GP Timer asymmetric /symmetric PWM wave form Asymmetric Waveform Generation �� GP Timer �� continuous up-counting mod output waveform (PWM) �� -�� 0 �� timer counter �� -�� compare m compare register) �� compare math -�� period -�� 0 �� period -Toggle

�� 5 GP Timer Compare/PWM Output in Up-Counting M

Symmetric Waveform Generation �� GP Timer �� continuous up-/down counting output waveform (PWM) �� -�� 0 �� timer counter �� -�� compare math compare register) �� compare math -�� compare math -Toggle �� compare math �� -�� period -�� 0 �� period -Toggle

�� 6 GP Timer Compare/PWM Output in Up-/Down Counting Mode �� active high, act force low, force high �� PWM Output register

PWM 6=AH PWM 5=AL 0 0 1 1 0 0 1 PWM 4=AH PWM 2=AH PWM 3=AL PWM 1=AL �� 7 ACTRA Compare Unit 1= Bit 0 -3 =PWM 1, PWM 2 Compare Unit 2= Bit 4 -7=PWM 3, PWM 4 Compare Unit 3= Bit 8 -11=PWM 5, PWM 6 ACTRA=0999 PWM 2 AH PWM 1 AL �� 8 Symmetrical PWM 1, PW

��register �� litrrature number SPRU 065

General-Purpose Input/Output (GPIO) �� -Digital I/O �� Peripheral �� GPx. MUX registers -�� Digital I/O �� Input/Output � GPIO MUX register GPx. DIR registers �� Port �� GPIO �� MUX, Direct Set, Clear, Toggle Registers

GPx. MUX Registers �� Port �� GPIO �� MUX registers �� Digita IF GPx. MUX. bit=0 Pin �� Digital I/O IF GPx. MUX. bit=1 Pin �� GPx. DIR Register �� Port �� GPIO �� GPx. DIR registers �� Input �� Output IF GPx. DIR. bit=0 Pin �� Input IF GPx. DIR. bit=1 Pin �� Output X=PORT A, B, D, E, F, G

GPx. SET Register �� Port �� GPIO �� GPx. SET registers �� PI �� Output IF GPx. SET. bit=0, ignored (no effect) �� Output �� High IF GPx. SET. bit=1, PIN GPx. CLEAR Registers �� Port �� GPIO �� GPx. CLEAR registers ��P �� Output IF GPx. CLEAR. bit=0, ignored (no effect) �� Output �� Low IF GPx. CLEAR. bit=1, PIN

GPx. TOGGLE Registers �� Port �� GPIO �� GPx. Toggle registers ��P �� Output IF GPx. Toggle. bit=0, ignored (no effect) �� Output �� IF GPx. Toggle. bit=1, PIN

C 28 x GPIO Pin Assignment GPIO A GPIOA 0 / GPIOA 1 / GPIOA 2 / GPIOA 3 / GPIOA 4 / GPIOA 5 / GPIOA 6 / GPIOA 7 / GPIOA 8 / GPIOA 9 / GPIOA 10 / GPIOA 11 / GPIOA 12 / GPIOA 13 / GPIOA 14 / GPIOA 15 / PWM 1 PWM 2 PWM 3 PWM 4 PWM 5 PWM 6 T 1 PWM_T 1 CMP T 2 PWM_T 2 CMP CAP 1_QEP 1 CAP 2_QEP 2 CAP 3_QEPI 1 TDIRA TCLKINA C 1 TRIP C 2 TRIP C 3 TRIP GPIO F GPIOF 0 / GPIOF 1 / GPIOF 2 / GPIOF 3 / GPIOF 4 / GPIOF 5 / GPIOF 6 / GPIOF 7 / GPIOF 8 / GPIOF 9 / GPIOF 10 / GPIOF 11 / GPIOF 12 / GPIOF 13 / GPIOF 14 / GPIO D GPIO B GPIOB 0 / GPIOB 1 / GPIOB 2 / GPIOB 3 / GPIOB 4 / GPIOB 5 / GPIOB 6 / GPIOB 7 / GPIOB 8 / GPIOB 9 / GPIOB 10 / GPIOB 11 / GPIOB 12 / GPIOB 13 / GPIOB 14 / GPIOB 15 / PWM 7 PWM 8 PWM 9 PWM 10 PWM 11 PWM 12 T 3 PWM_T 3 CMP T 4 PWM_T 4 CMP CAP 4_QEP 3 CAP 5_QEP 4 CAP 6_QEPI 2 TDIRB TCLKINB C 4 TRIP C 5 TRIP C 6 TRIP GPIOD 0 GPIOD 1 GPIOD 5 GPIOD 6 / / T 1 CTRIP_PDPINTA T 2 CTRIP / EVASOC T 3 CTRIP_PDPINTB T 4 CTRIP / EVBSOC GPIO E GPIOE 0 / XINT 1_XBIO GPIOE 1 / XINT 2_ADCSOC GPIOE 2 / XNMI_XINT 13 GPIO G SPISIMOA SPISOMIA SPICLKA SPISTEA SCITXDA SCIRXDA CANTXA CANRXA MCLKRA MFSXA MFSRA MDXA MDRA XF GPIOG 4 / SCITXDB GPIOG 5 / SCIRXDB �� GPIO D, E, G, F �� Reser �� PIN �� e. ZDSP_TMS 320 board �� 2812_ezdsp_Tech. Ref_F BIT

Ex. Example_281 x. Ev. Pwm. c //Description #include “header_file” (generate PWM 1 -12) (�� (function �� init_eva/b �� //�� function �� void init_eva(void) �� /�� =void init_evb(void) // void main(void) { init_eva( ); init_evb( ); for(; ; ); } void init_eva( ) { (�� function init_eva ) (Idle Loop) (�� function �� init_eva() ) } void init_evb( ) { } (�� function �� init_eva() )

�� project 1. Menu Project->New

Project Name: Project. Pwm Location: c: Project Type: Executable(. out) Target: TMS 320 C 28 XX Click: Finish �� Folder Project �� header file �� C Source code �� Default �� DSP�� NOTE:

2 . �� C-Source Code Menu File->New->Source File

Menu: File->Save as

Save in: project Filename: Project. Pwm Save as type: C Source Files Click: Save

3. Add code file to the project Menu Project->Add files to project �� Folder Project : project. Pwm. c : DSP 281 x_Codestartbranch. asm : DSP 281 x_Defaultsisr. c : DSP 281 x_Globalvariabledef. c : DSP 281 x_Pie. Ctrl. c : DSP 281 x_Pie. Vect. c : DSP 281 x_Sys. Ctrl. c : DSP 281 x_header_non. BIOS. cmd : Ez. DSP_RAM_INK. cmd �� PWM �� Default � register �� DSP Link Command File : ��

4. Add the C-runtime-library to Project->Build Option Linker->Library Search Patch Type: C: Tic 2000cgtoolslib Linker->Include Libraries Type: rts 2800_ml. lib Add the stack-size of 0 x 400 Linker->Stack Size(-Stack) Type: 0 x 400 Close Build Option Click OK

5. Menu Project->Build

6. Load File project. Pwm. out and run Program Menu File->Load Program ->project. Pwm. out ->Click Open

Run Program Halt Program

REFERENCE 1. Texas Instrument “TMS 320 x 281 x DSP Event Manager (EV) Referencre Guide. ” (SPRU 065 d) November 2004 2. Texas Instrument “TMS 320 x 281 x DSP System Control and Interrupts Refer Ence Guide. ” (SPRU 078 C) March 2005 3. Texas Instrument “ACI 3_1 For TMS 320 F 281 X Setup Company. ” (SPRC 130)