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Setup

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5.4

Default Register Settings in the TCA8418E when Using the LaunchPad

Upon startup, the MSP430 LaunchPad configures the TCA8418E to work as a keypad scanner with the
following values:

Table 2. Default TCA8418E Register Values When Using the LaunchPad

Register

Register Name

Default Value for EVM

Comment

0x00

Reserved

0x97

Interrupts enabled (except Overflow)

0x01

CFG

0x00

0x02

INT_STAT

0x00

0x03

KEY_LCK_EC

0x00

0x04

KEY_EVENT_A

0x00

0x05

KEY_EVENT_B

0x00

0x06

KEY_EVENT_C

0x00

0x07

KEY_EVENT_D

0x00

0x08

KEY_EVENT_E

0x00

0x09

KEY_EVENT_F

0x00

0x0A

KEY_EVENT_G

0x00

0x0B

KEY_EVENT_H

0x00

0x0C

KEY_EVENT_I

0x00

0x0D

KEY_EVENT_J

0x00

0x0E

KP_LCK_TIMER

0xA7

0x0F

Unlock1

0x0C

Key #12

0x10

Unlock2

0x0C

Key #12 – Press twice to unlock

0x11

GPIO_INT_STAT1

0x00

0x12

GPIO_INT_STAT2

0x00

0x13

GPIO_INT_STAT3

0x00

0x14

GPIO_DAT_STAT1

0xFF

0x15

GPIO_DAT_STAT2

0xFF

0x16

GPIO_DAT_STAT3

0x03

0x17

GPIO_DAT_OUT1

0x00

0x18

GPIO_DAT_OUT2

0x00

0x19

GPIO_DAT_OUT3

0x00

0x1A

GPIO_INT_EN1

0x00

0x1B

GPIO_INT_EN2

0x00

0x1C

GPIO_INT_EN3

0x00

0x1D

KP_GPIO1

0xFF

ROW0 through ROW7: keypad scan

0x1E

KP_GPIO2

0xFF

COL0 through COL7: keypad scan

0x1F

KP_GPIO3

0x00

0x20

GPI_EM1

0x00

0x21

GPI_EM2

0x00

0x22

GPI_EM3

0x00

0x23

GPIO_DIR1

0x00

0x24

GPIO_DIR2

0x00

0x25

GPIO_DIR3

0x00

0x26

GPIO_INT_LVL_1

0x00

0x27

GPIO_INT_LVL_2

0x00

0x28

GPIO_INT_LVL_3

0x00

0x29

DEBOUNCE_DIS_1

0x00

0x2A

DEBOUNCE_DIS_2

0x00

0x2B

DEBOUNCE_DIS_3

0x00

TCA8418E Keypad Scan EVM

SLVUAA2 – August 2014

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Содержание TCA8418E

Страница 1: ...onfiguration on the LaunchPad 5 4 Proper Orientation for the TCA8418E EVM on the LaunchPad 6 5 Opening Device Manager in Windows 6 6 Updating Driver Software in Device Manager 7 7 Browsing for the Driver Software 7 8 Successful Installation of the MSP430 LaunchPad Drivers 7 9 Flashing the MSP430 7 10 Successfully Flashed MSP430 8 11 Installing the TCA8418E EVM GUI 9 12 TCA8418E EVM GUI After Conne...

Страница 2: ...the TCA8418E EVM TCA8418E EVM TCA8418E datasheet SCPS222 One power supply for VCC 3 3 V at 100 mA recommended 3 Items Recommended for Operation The following items are recommended for use with the TCA8418E EVM MSP430 LaunchPad Recommended rev 1 5 MSP430G2553 installed USB standard A to mini B cable Computer running Microsoft Windows 7 with 1 available USB port 4 Introduction This document is the u...

Страница 3: ...1 Device and Package Configurations Keypad Scan IC IC Package U1 TCA8418EYFFR DSBGA 32 Figure 1 TCA8418E EVM 3 SLVUAA2 August 2014 TCA8418E Keypad Scan EVM Submit Documentation Feedback Copyright 2014 Texas Instruments Incorporated ...

Страница 4: ...or the MSP430 LaunchPad to the TCA8418E EVM 5 1 4 J3 I2 C Test Points Header J3 is a test point for SDA and SCL and allows I2 C input when the LaunchPad is not present 5 1 5 J4 RESET and Interrupt Test Points Test point J4 is a test point for the RESET input INT output and CAD_INT output 5 1 6 J5 Keypad Extension Header Header J5 allows extension of the functionality of the TCA8418E EVM onto a lar...

Страница 5: ...llowing steps before using the TCA8418E EVM in conjunction with the LaunchPad 1 With the LaunchPad unplugged configure the headers on the LaunchPad to be in HW UART mode by attaching jumpers on the headers indicated by the yellow boxes in Figure 3 Figure 3 Proper Jumper Configuration on the LaunchPad 5 SLVUAA2 August 2014 TCA8418E Keypad Scan EVM Submit Documentation Feedback Copyright 2014 Texas ...

Страница 6: ...r GUI in a zipped folder SLVC601 located on the TCA8418E EVM webpage on ti com 4 Right click on the zip folder and select Extract All 5 Click Extract 6 Plug in the MSP430 LaunchPad to the computer 7 Open Device Manager Type devmgmt msc into the Start menu and hit Enter Figure 5 Opening Device Manager in Windows 8 Select the MSP430 Application see Figure 6 right click Properties and click Update Dr...

Страница 7: ...ck Next Click Close after you see the following Figure 8 Successful Installation of the MSP430 LaunchPad Drivers 12 Flash the MSP430 by double clicking TCA8418E_Flasher bat in the TCA8418E EVM LaunchPad Files folder where you extracted SLVC601 zip Figure 9 Flashing the MSP430 7 SLVUAA2 August 2014 TCA8418E Keypad Scan EVM Submit Documentation Feedback Copyright 2014 Texas Instruments Incorporated ...

Страница 8: ... to close the window A successful flash of the firmware results in the following command line prompt Figure 10 Successfully Flashed MSP430 14 Press any key to continue 8 TCA8418E Keypad Scan EVM SLVUAA2 August 2014 Submit Documentation Feedback Copyright 2014 Texas Instruments Incorporated ...

Страница 9: ...talling the TCA8418E EVM GUI 2 If the GUI does not launch automatically run the installed TCA8418E EVM GUI program from the Start menu 3 The GUI looks like the following image when it is opened and the LaunchPad is connected Figure 12 TCA8418E EVM GUI After Connecting the LaunchPad to the Computer 9 SLVUAA2 August 2014 TCA8418E Keypad Scan EVM Submit Documentation Feedback Copyright 2014 Texas Ins...

Страница 10: ...7 0x0F Unlock1 0x0C Key 12 0x10 Unlock2 0x0C Key 12 Press twice to unlock 0x11 GPIO_INT_STAT1 0x00 0x12 GPIO_INT_STAT2 0x00 0x13 GPIO_INT_STAT3 0x00 0x14 GPIO_DAT_STAT1 0xFF 0x15 GPIO_DAT_STAT2 0xFF 0x16 GPIO_DAT_STAT3 0x03 0x17 GPIO_DAT_OUT1 0x00 0x18 GPIO_DAT_OUT2 0x00 0x19 GPIO_DAT_OUT3 0x00 0x1A GPIO_INT_EN1 0x00 0x1B GPIO_INT_EN2 0x00 0x1C GPIO_INT_EN3 0x00 0x1D KP_GPIO1 0xFF ROW0 through ROW...

Страница 11: ... in mind that SCL and SDA are pulled up to VCC on the TCA8418E EVM through 4 7 kΩ resistors Therefore using the same power supply for the microcontroller and the TCA8418E EVM is recommended 3 Use the built in 3x3 keypad on the TCA8418E EVM or use J5 to attach an external keypad If attaching an external keypad the KP_GPIO registers 0x1D 0x1E and 0x1F should be configured to accommodate the addition...

Страница 12: ...interrupt enable bits for different types of interrupts The INT_STAT register contains the actual state of each type of interrupt The KEY_LCK_EC contains the lock status can be written to lock the keypad and counts the number of key events in the 4 least significant bits KEY_EVENT_A is the top of the first in first out FIFO stack that records key presses and releases KEY_EVENT_A is read automatica...

Страница 13: ...appears in the activity log text Figure 17 Figure 17 Result of Reading Register 0x0E Similarly any register can be written as well Figure 18 shows how to write 0xA6 to register 0x0E Figure 18 Writing 0xA6 to Register 0x0E The activity log reflects the newly written register Figure 19 Result of Writing 0xA6 to Register 0x0E 13 SLVUAA2 August 2014 TCA8418E Keypad Scan EVM Submit Documentation Feedba...

Страница 14: ...0 E2 COL1 A3 COL2 B3 COL3 C3 COL4 D3 COL5 E3 COL6 A4 COL7 B4 COL8 C4 COL9 D4 GND E4 RESET A5 VCC B5 SDA C5 SCL D5 INT E5 CAD_INT B2 U1 TCA8418EYFPR 5 4 1 2 3 6 7 8 9 10 J1 5 4 1 2 3 6 7 8 9 10 J2 TP1 SDA SCL RESET INT CAD_INT VCC VCC VCC VCC GND P1 0 P1 1 P1 2 P1 3 RESET INT CAD_INT P2 1 P2 2 P2 3 P2 4 P2 5 SCL SDA RST TST XOUT XIN ROW7 COL9 ROW2 ROW3 ROW4 ROW5 ROW6 COL0 COL1 COL2 COL3 COL4 COL5 C...

Страница 15: ...www ti com Board Layout 7 Board Layout Figure 21 PCB Layer 1 Top Layer 15 SLVUAA2 August 2014 TCA8418E Keypad Scan EVM Submit Documentation Feedback Copyright 2014 Texas Instruments Incorporated ...

Страница 18: ...Board Layout www ti com Figure 24 PCB Layer 4 Bottom Layer 18 TCA8418E Keypad Scan EVM SLVUAA2 August 2014 Submit Documentation Feedback Copyright 2014 Texas Instruments Incorporated ...

Страница 19: ... 230 mil above insulator Solutions J5 1 Receptacle 10x2 100mil TH 10x2 Receptacle PPPC102LFBN RC Sullins Connector Solutions LBL1 1 Thermal Transfer Printable Labels PCB Label 1 25 H x THT 13 457 10 Brady 1 250 W x 0 250 H 10 000 per roll 0 250 W R1 R2 2 4 7k RES 4 7kΩ 5 0 1W 0603 603 CRCW06034K70JNEA Vishay Dale R3 R4 R5 3 10k RES 10kΩ 5 0 1W 0603 603 CRCW060310K0JNEA Vishay Dale SW1 SW3 9 SWITCH...

Страница 20: ...ndling and use of EVMs and if applicable compliance in all respects with such laws and regulations 10 User has sole responsibility to ensure the safety of any activities to be conducted by it and its employees affiliates contractors or designees with respect to handling and using EVMs Further user is responsible to ensure that any interfaces electronic and or mechanical between EVMs and any human ...

Страница 21: ...This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at its own expense FCC Interference Statement ...

Страница 22: ...érieur au gain maximal indiqué sont strictement interdits pour l exploitation de l émetteur Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265 Copyright 2014 Texas Instruments Incorporated spacer Important Notice for Users of EVMs Considered Radio Frequency Products in Japan EVMs entering Japan are NOT certified by TI as conforming to Technical Regulations of Radio Law of ...

Страница 23: ...esponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related information or support that may be provided by TI Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failur...

Страница 24: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments TCA8418E EVM ...

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