KBI 功能使用方法
KBI 功能使用方法
1
適用產品：
1.1 SM59R16A2/ SM59R08A2
1.2 SM59R16A5/ SM59R09A5/ SM59R05A5/SM59R16A3/SM59R09A3/SM59R05A3
1.3 SM59R04A2/ SM59R04A1/ SM59R03A1/ SM59R02A1
2
文件說明：SM59R 系列注意 KBI 因架構差異，SM59R16A2/SM59R08A2 於第四節說明。
3
SM59R16A5/ SM59R09A5/ SM59R05A5/ SM59R16A3/ SM59R09A3/ SM59R05A3/ SM59R04A2/
SM59R04A1/ SM59R03A1/ SM59R02A1 KBI 使用說明：
3.1 共有 8 個 I/O 可致能為 KBI 功能 I/O。
3.2 由 Port 0 或 Port 2 共 8 個 I/O，分別對應至 8 個獨立的 flag(KBF.0~ KBF.7)，且共用同一個中斷
向量位置(0x5B)。
3.3 可由程式設定為高電位或低電位觸發。
3.4 當觸發訊號輸入至 KBI 任一引腳，其對應的旗標將會被設置為”1”，並且進入中斷副程式。
3.5 KBI 功能主要可做為 4x4 矩陣式鍵盤掃描，或其它應用。
KBI0
KBI1
KBI2
KBI3
KBI4
KBI5
KBI6
KBI7
Input
circuitry
Input
circuitry
Input
circuitry
Input
circuitry
Input
circuitry
Input
circuitry
Input
circuitry
Input
circuitry
OR
KBIIF: KBI interrupt flag
IEKBI: KBI interrupt enable
Fig. Interrupts from KBI 8 inputs
Specifications subject to change without notice, contact your sales representatives for the most recent information.
ISSFA-0185
1
Ver. A 2010/07
KBI 功能使用方法
200KHz
0
KBIx
De-bounce
KBF.x
1
KBD[1:0]
KBLS.x
KBE.x
Fig. keyboard input circuitry
3.6 KBI 相關暫存器：
KBI
Description
AUX
Auxiliary register
KBI level
selection
KBI input enable
KBI flag
KBI De-bounce
control register
Interrupt Enable 1
register
Interrupt request
register
KBLS
KBE
KBF
KBD
IEN1
IRCON
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RESE
T
KBI function
P4CC P4SPI
P4UR1
P4IIC
P0KBI
-
DPS
00H
KBLS7
KBLS6
KBLS5
KBLS4
KBLS3
KBLS2
KBLS1
KBLS0
00H
94h
95h
KBE7
KBF7
KBE6
KBF6
KBE5
KBF5
KBE4
KBF4
KBE3
KBF3
KBE2
KBF2
KBE1
KBF1
KBE0
KBF0
00H
00H
96h
KBDEN
-
-
-
-
-
KBD1
KBD0
00H
B8h
EXEN2
-
IEIIC
IELVI
IEKBI
IEADC
IESPI
IEPWM
00h
C0H
EXF2
TF2
IICIF
LVIIF
KBIIF
ADCIF
SPIIF
PWMIF
00H
Dire
ct
Bit 7
91h
BRGS
93h
Mnemonic: AUX
7
6
BRGS
P4CC
5
P4SPI
Bit 6
4
P4UR1
Bit 5
3
P4IIC
2
P0KBI
1
-
Address: 91h
0
Reset
DPS
00H
P0KBI: P0KBI = 0 – KBI function on P2.
P0KBI = 1 – KBI function on P0.
Mnemonic: KBLS
7
6
KBLS.7
KBLS.6
5
KBLS.5
4
KBLS.4
3
KBLS.3
2
KBLS.2
1
KBLS.1
Address: 93h
0
Reset
KBLS.0
00h
KBLS.7: 觸發準位設定位元 (Keyboard Line 7 level selection bit)
0 : 設定為低準位觸發
1 : 設定為高準位觸發
KBLS.6: 觸發準位設定位元 (Keyboard Line 6 level selection bit)
0 : 設定為低準位觸發
1 : 設定為高準位觸發
KBLS.5: 觸發準位設定位元 (Keyboard Line 5 level selection bit)
0 : 設定為低準位觸發
1 : 設定為高準位觸發
KBLS.4: 觸發準位設定位元 (Keyboard Line 4 level selection bit)
0 : 設定為低準位觸發
Specifications subject to change without notice, contact your sales representatives for the most recent information.
ISSFA-0185
2
Ver. A 2010/07
KBI 功能使用方法
1 : 設定為高準位觸發
KBLS.3: 觸發準位設定位元 (Keyboard Line 3 level selection bit)
0 : 設定為低準位觸發
1 : 設定為高準位觸發
KBLS.2: 觸發準位設定位元 (Keyboard Line 2 level selection bit)
0 : 設定為低準位觸發
1 : 設定為高準位觸發
KBLS.1: 觸發準位設定位元 (Keyboard Line 1 level selection bit)
0 : 設定為低準位觸發
1 : 設定為高準位觸發
KBLS.0: 觸發準位設定位元 (Keyboard Line 0 level selection bit)
0 : 設定為低準位觸發
1 : 設定為高準位觸發
Mnemonic: KBE
7
6
KBE.7
KBE.6
5
KBE.5
4
KBE.4
3
KBE.3
2
KBE.2
1
KBE.1
Address: 94h
0
Reset
KBE.0
00h
1
KBF.1
Address: 95h
0
Reset
KBF.0
00h
KBE.7: 致能位元 (Keyboard Line 7 enable bit)
0 : KBI 禁能，預設為一般的出入埠(GPIO)
1 : KBI 致能，當觸發訊號輸入時，KBF.7 = 1，會觸發中斷
KBE.6: 致能位元 (Keyboard Line 6 enable bit)
0 : KBI 禁能，預設為一般的出入埠(GPIO)
1 : KBI 致能，當觸發訊號輸入時，KBF.7 = 1，會觸發中斷
KBE.5: 致能位元 (Keyboard Line 5 enable bit)
0 : KBI 禁能，預設為一般的出入埠(GPIO)
1 : KBI 致能，當觸發訊號輸入時，KBF.7 = 1，會觸發中斷
KBE.4: 致能位元 (Keyboard Line 4 enable bit)
0 : KBI 禁能，預設為一般的出入埠(GPIO)
1 : KBI 致能，當觸發訊號輸入時，KBF.7 = 1，會觸發中斷
KBE.3: 致能位元 (Keyboard Line 3 enable bit)
0 : KBI 禁能，預設為一般的出入埠(GPIO)
1 : KBI 致能，當觸發訊號輸入時，KBF.7 = 1，會觸發中斷
KBE.2: 致能位元 (Keyboard Line 2 enable bit)
0 : KBI 禁能，預設為一般的出入埠(GPIO)
1 : KBI 致能，當觸發訊號輸入時，KBF.7 = 1，會觸發中斷
KBE.1: 致能位元 (Keyboard Line 1 enable bit)
0 : KBI 禁能，預設為一般的出入埠(GPIO)
1 : KBI 致能，當觸發訊號輸入時，KBF.7 = 1，會觸發中斷
KBE.0: 致能位元 (Keyboard Line 0 enable bit)
0 : KBI 禁能，預設為一般的出入埠(GPIO)
1 : KBI 致能，當觸發訊號輸入時，KBF.7 = 1，會觸發中斷
Mnemonic: KBF
7
6
KBF.7
KBF.6
5
KBF.5
4
KBF.4
3
KBF.3
2
KBF.2
KBF.7: KBI 觸發旗標 (Keyboard Line 7 flag)
Specifications subject to change without notice, contact your sales representatives for the most recent information.
ISSFA-0185
3
Ver. A 2010/07
KBI 功能使用方法
1: 當 KBI7 偵測到輸入訊號時，KBF.7 由硬體設為”1”，並產生 KBI 中斷；
0: 必須由軟體清除為”0”
KBF.6: KBI 觸發旗標 (Keyboard Line 6 flag)
1: 當 KBI6 偵測到輸入訊號時，KBF.6 由硬體設為”1”，並產生 KBI 中斷；
0: 必須由軟體清除為”0”
KBF.5: KBI 觸發旗標 (Keyboard Line 5 flag)
1: 當 KBI5 偵測到輸入訊號時，KBF.5 由硬體設為”1”，並產生 KBI 中斷；
0: 必須由軟體清除為”0”
KBF.4: KBI 觸發旗標 (Keyboard Line 4 flag)
1: 當 KBI4 偵測到輸入訊號時，KBF.4 由硬體設為”1”，並產生 KBI 中斷；
0: 必須由軟體清除為”0”
KBF.3: KBI 觸發旗標 (Keyboard Line 3 flag)
1: 當 KBI3 偵測到輸入訊號時，KBF.3 由硬體設為”1”，並產生 KBI 中斷；
0: 必須由軟體清除為”0”
KBF.2: KBI 觸發旗標 (Keyboard Line 2 flag)
1: 當 KBI2 偵測到輸入訊號時，KBF.2 由硬體設為”1”，並產生 KBI 中斷；
0: 必須由軟體清除為”0”
KBF.1: KBI 觸發旗標 (Keyboard Line 1 flag)
1: 當 KBI1 偵測到輸入訊號時，KBF.1 由硬體設為”1”，並產生 KBI 中斷；
0: 必須由軟體清除為”0”
KBF.0: KBI 觸發旗標 (Keyboard Line 0 flag)
1: 當 KBI0 偵測到輸入訊號時，KBF.0 由硬體設為”1”，並產生 KBI 中斷；
0: 必須由軟體清除為”0”
Mnemonic: KBD
7
6
KBDEN
-
5
-
4
-
3
-
2
-
1
KBD.1
Address: 96H
0
Reset
KBD.0
00H
KBDEN: 除彈跳功能致能位元(Enable KBI de-bounce function).
預設為致能(The default KBI function is enabled).
KBDEN = 0, 致能除彈跳功能
KBDEN = 1, 禁能除彈跳功能
KBD[1:0]: 除彈跳時間設定位元. 若 KBDEN = “0”，則預設為 320 ms.
KBD[1:0] = 00, 除彈跳時間為 320 ms.
KBD[1:0] = 01, 除彈跳時間為 160 ms.
KBD[1:0] = 10, 除彈跳時間為 80 ms.
KBD[1:0] = 11, 除彈跳時間為 40 ms.
Mnemonic: IEN1
7
6
EXEN2
5
IEIIC
4
IELVI
3
IEKBI
2
IEADC
1
IESPI
Address: B8h
0
Reset
IEPWM
00h
IEKBI: KBI interrupt enable.
IEKBI = 0 – Disable KBI interrupt.
IEKBI = 1 – Enable KBI interrupt.
Specifications subject to change without notice, contact your sales representatives for the most recent information.
ISSFA-0185
4
Ver. A 2010/07
KBI 功能使用方法
Mnemonic: IRCON
7
6
5
EXF2
TF2
IICIF
4
LVIIF
3
KBIIF
2
ADCIF
1
SPIIF
Address: C0h
0
Reset
PWMIF
00H
KBIIF: KBI interrupt flag. Must be cleared by software.
3.7 以下是 KBI 相對應的中斷向量表：
Table 11-1: Interrupt vectors
IE0 – External interrupt 0
TF0 – Timer 0 interrupt
Interrupt Vector
Address
0003h
000Bh
Interrupt Number
*(use Keil C Tool)
0
1
IE1 – External interrupt 1
0013h
2
TF1 – Timer 1 interrupt
RI0/TI0 – Serial channel 0 interrupt
TF2/EXF2 – Timer 2 interrupt
001Bh
0023h
002Bh
3
4
5
PWMIF – PWM interrupt
0043h
8
SPIIF – SPI interrupt
004Bh
9
ADCIF – A/D converter interrupt
KBIIF – keyboard Interface interrupt
LVIIF – Low Voltage Interrupt
IICIF – IIC interrupt
RI1/TI1 – Serial channel 1 interrupt
0053h
005Bh
0063h
006Bh
0083h
10
11
12
13
16
Interrupt Request Flags
*See Keil C about C51 User’s Guide about Interrupt Function description
KBI 中斷應用的參考程式：
(1) 中斷致能設置：
void Init_KBI(void)
{
//KBI function input pin select//
AUX = 0x00;
//enable all Port 2 as KBI I/O
//AUX = 0x04;
// enable all Port 0 as KBI I/O
//de-bounce mechanism select//
KBD = 0x00;
//enable KBI de-bounce function and set de-bounce time is 320 ms.
//KBD = 0x02;
// enable KBI de-bounce function and set de-bounce time is 80 ms.
//KBD = 0x80;
//disable KBI de-bounce mechanism
//Keyboard level selector register
Specifications subject to change without notice, contact your sales representatives for the most recent information.
ISSFA-0185
5
Ver. A 2010/07
KBI 功能使用方法
KBLS = 0x00;
//Detect_Lo_level;
//KBLS = 0xff;
//Detect_Hi_level;
//Keyboard input enable register
//KBE = 0x00;
//enable standard I/O pin
KBE = 0xff;
//enable KBI.KBF to generate interrupt
IEN0 = 0x80;
//enable all interrupt
IEN1 = 0x08;
//enable KBI interrupt
KBF = 0x00;
//clear KBF flag
IRCON_KBIIF = 0;
//clear KBI flag
}
(2) 中斷副程式：
void KBI_ISR(void) interrupt 11
//INTERRUPT VECTOR ADDR 0x5B
{
KBF = 0x00;
//clear KBF flag
IRCON_KBIIF = 0;
//clear KBI flag
}
3.8 KBI 使用組合語言的範例說明
3.8.1 KBI I/O全部致能
3.8.2 當外部觸發訊號至KBI I/O時產生中斷，並將結果顯示於Port1
3.9 KBI 使用組合語言的範例程式
Description
Main program
//此範例應用包括
;=========================================================================
;
;
S Y N C M O S T E C H N O L O G Y
;
;=========================================================================
; KBI function input pin select
sfr AUX = 0x91;
; de-bounce mechanism select
sfr KBD = 0x96;
;Keyboard level selector register
sfr KBLS = 0x93;
;Keyboard input enable register
sfr KBE = 0x94;
;Keyboard interrupt flag register
sfr KBF = 0x95;
sfr P1
= 0x90;
Specifications subject to change without notice, contact your sales representatives for the most recent information.
ISSFA-0185
6
Ver. A 2010/07
KBI 功能使用方法
sfr P2
=
sfr IEN0
=
sfr IEN1
=
;sfr
IEN2
sfr IRCON
=
0xA0;
0xA8;
0xB8;
= 0x9A;
0xC0;
ORG
0000H
JMP
BEGIN
ORG
005BH
JMP
KBI_INT
;==================================================
;KBI INTERRUPT INIT ROUTINE
;==================================================
BEGIN:
;
MOV
P1,
#00H
;
MOV
IEN0,
#80H
;EA =1
MOV
IEN1,
#08H
;IEKBI =1
;
MOV
IEN2,
#00H
;
MOV
AUX,
#00H
; enable all Port 2 as KBI I/O
MOV
KBD,
#00H
; enable KBI de-bounce function and set de-bounce
;time is 320 ms.
MOV
KBLS,
#0FFH
;High level detect
;
MOV
KBLS,
#000H
;Low level detect
MOV
KBE,
#0FFH
;KBI all pin enable
MOV
KBF,
#00H
;KBI all flag clear
JMP START
;==================================================
;MAIN
;==================================================
START:
JMP START
;==================================================
;KBI INTERRUPT ROUTINE
;==================================================
KBI_INT:
MOV
P1,
KBF
MOV
KBF,
#00H
ANL
IRCON, #08H
RETI
END
Specifications subject to change without notice, contact your sales representatives for the most recent information.
ISSFA-0185
7
Ver. A 2010/07
KBI 功能使用方法
4
SM59R16A2/ SM59R08A2 EEI 使用說明：
4.1 Port1 所有的引腳皆可為 GPIO，或獨立致能為 EEI 功能
4.2 由 Port1.0~Port1.7 共八支引腳，分別對應至 8 個獨立的 flag(KBF.0~ KBF.7)，及共用同一個中斷
向量位置(0x5B)
4.3 可由程式設定為高電位或低電位觸發
4.4 當觸發訊號輸入至 Port1 任一引腳，其對應的旗標將會被設置為”1”，並且進入中斷副程式
4.5 EEI 功能主要可做為 4x4 矩陣式鍵盤掃描，或其它類似的應用
P1.0
P1.1
P1.2
P1.3
OR
P1.4
EEIIF: EEI interrupt
P1.5
IEEEI: EEI interrupt enable
P1.6
P1.7
Fig. Interrupts from EEI 8 inputs
4.6 EEI 相關暫存器：
EEI
KBLS
KBE
KBF
Description
Direct
Bit 7
EEI level selection
EEI input enable
EEI flag
93h
94h
95h
KBLS7
KBE7
KBF7
Mnemonic: KBLS
7
6
KBLS.7
KBLS.6
5
KBLS.5
Bit 6
Bit 5
Bit 4
EEI function
KBLS6 KBLS5 KBLS4
KBE6
KBE5
KBE4
KBF6
KBF5
KBF4
4
KBLS.4
3
KBLS.3
Bit 3
Bit 2
Bit 1
Bit 0
RESET
KBLS3
KBE3
KBF3
KBLS2
KBE2
KBF2
KBLS1
KBE1
KBF1
KBLS0
KBE0
KBF0
00h
00h
00h
2
KBLS.2
1
KBLS.1
Address: 93h
0
Reset
KBLS.0
00h
KBLS.7: EEI line 7 觸發準位設定位元
0 : 設定為低準位觸發
1 : 設定為高準位觸發
KBLS.6: EEI line 6 觸發準位設定位元
0 : 設定為低準位觸發
1 : 設定為高準位觸發
Specifications subject to change without notice, contact your sales representatives for the most recent information.
ISSFA-0185
8
Ver. A 2010/07
KBI 功能使用方法
KBLS.5: EEI line 5 觸發準位設定位元
0 : 設定為低準位觸發
1 : 設定為高準位觸發
KBLS.4: EEI line 4 觸發準位設定位元
0 : 設定為低準位觸發
1 : 設定為高準位觸發
KBLS.3: EEI line 3 觸發準位設定位元
0 : 設定為低準位觸發
1 : 設定為高準位觸發
KBLS.2: EEI line 2 觸發準位設定位元
0 : 設定為低準位觸發
1 : 設定為高準位觸發
KBLS.1: EEI line 1 觸發準位設定位元
0 : 設定為低準位觸發
1 : 設定為高準位觸發
KBLS.0: EEI line 0 觸發準位設定位元
0 : 設定為低準位觸發
1 : 設定為高準位觸發
Mnemonic: KBE
7
6
KBE.7
KBE.6
5
KBE.5
4
KBE.4
3
KBE.3
2
KBE.2
1
KBE.1
Address: 94h
0
Reset
KBE.0
00h
KBE.7: EEI line 7 (P1.7)致能位元
0 : 致能為一般的出入埠(GPIO)
1 : 致能為 EEI 功能，當觸發訊號輸入時，KBF.7 = 1，會觸發中斷
KBE.6: EEI line 6 (P1.6)致能位元
0 : 致能為一般的輸出入埠(GPIO)
1 : 致能為 EEI 功能，當觸發訊號輸入時，KBF.6 = 1，會觸發中斷
KBE.5: EEI line 5 (P1.5)致能位元
0 : 致能為一般的輸出入埠(GPIO)
1 : 致能為 EEI 功能，當觸發訊號輸入時，KBF.5 = 1，會觸發中斷
KBE.4: EEI line 4 (P1.4)致能位元
0 : 致能為一般的輸出入埠(GPIO)
1 : 致能為 EEI 功能，當觸發訊號輸入時，KBF.4 = 1，會觸發中斷
KBE.3: EEI line 3 (P1.3)致能位元
0 : 致能為一般的輸出入埠(GPIO)
1 : 致能為 EEI 功能，當觸發訊號輸入時，KBF.3 = 1，會觸發中斷
KBE.2: EEI line 2 (P1.2)致能位元
0 : 致能為一般的輸出入埠(GPIO)
1 : 致能為 EEI 功能，當觸發訊號輸入時，KBF.2 = 1，會觸發中斷
KBE.1: EEI line 1 (P1.1)致能位元
0 : 致能為一般的輸出入埠(GPIO)
1 : 致能為 EEI 功能，當觸發訊號輸入時，KBF.1 = 1，會觸發中斷
KBE.0: EEI line 0 (P1.0)致能位元
0 : 致能為一般的輸出入埠(GPIO)
1 : 致能為 EEI 功能，當觸發訊號輸入時，KBF.0 = 1，會觸發中斷
Specifications subject to change without notice, contact your sales representatives for the most recent information.
ISSFA-0185
9
Ver. A 2010/07
KBI 功能使用方法
Mnemonic: KBF
7
6
KBF.7
KBF.6
5
KBF.5
4
KBF.4
3
KBF.3
2
KBF.2
1
KBF.1
Address: 95h
0
Reset
KBF.0
00h
KBF.7: EEI line 7 flag
當觸發訊號輸入時，KBF.7 = 1，會觸發中斷；
必須由軟體清除為”0”
KBF.6: EEI line 6 flag
當觸發訊號輸入時，KBF.6 = 1，會觸發中斷；
必須由軟體清除為”0”
KBF.5: EEI line 5 flag
當觸發訊號輸入時，KBF.5 = 1，會觸發中斷；
必須由軟體清除為”0”
KBF.4: EEI line 4 flag
當觸發訊號輸入時，KBF.4 = 1，會觸發中斷；
必須由軟體清除為”0”
KBF.3: EEI line 3 flag
當觸發訊號輸入時，KBF.3 = 1，會觸發中斷；
必須由軟體清除為”0”
KBF.2: EEI line 2 flag
當觸發訊號輸入時，KBF.2 = 1，會觸發中斷；
必須由軟體清除為”0”
KBF.1: EEI line 1 flag
當觸發訊號輸入時，KBF.1 = 1，會觸發中斷；
必須由軟體清除為”0”
KBF.0: EEI line 0 flag
當觸發訊號輸入時，KBF.0 = 1，會觸發中斷；
必須由軟體清除為”0”
P1.x
KBFx
KBLSx
KBEx
Fig. Block diagram of EEI input
4.7 以下是 EEI 相對應的中斷向量表：
Table 11-1: Interrupt vectors
Interrupt Request Flags
IE0 – External interrupt 0
Interrupt Vector Address
0003h
Interrupt Number *(use
Keil C Tool)
0
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KBI 功能使用方法
TF0 – Timer 0 interrupt
000Bh
1
IE1 – External interrupt 1
0013h
2
TF1 – Timer 1 interrupt
RI0/TI0 – Serial channel 0 interrupt
TF2/EXF2 – Timer 2 interrupt
001Bh
0023h
002Bh
3
4
5
SPIIF – SPI interrupt
004Bh
9
ADCIF – A/D converter interrupt
EEIIF – Expanded External Interrupt
IICIF – IIC interrupt
RI1/TI1 – Serial channel 1 interrupt
0053h
005Bh
006Bh
0083h
10
11
13
16
*See Keil C about C51 User’s Guide about Interrupt Function description
EEI 中斷應用的參考程式：
(1) 中斷致能設置：
void Init_EEI(void)
{
//Keyboard level selector register
KBLS = 0x00;
//Detect_Lo_level;
//KBLS = 0xff;
//Detect_Hi_level;
//Keyboard input enable register
//KBE
= 0x00;
KBE = 0xff;
//enable standard I/O pin
//enable EEI.KBF to generate interrupt
IEN0 = 0x80;
//enable all interrupt
IEN1 = 0x08;
//enable EEI interrupt
KBF = 0x00;
//clear KBF flag
IRCON_EEIIF = 0;
//clear EEI flag
}
(2) 中斷副程式：
void EEI_ISR(void) interrupt 11
//INTERRUPT VECTOR ADDR 0x5B
{
KBF = 0x00;
//clear KBF flag
IRCON_EEIIF = 0;
//clear EEI flag
}
4.8 EEI 使用組合語言的範例說明
4.8.1 Port1中所有的EEI功能全部致能
4.8.2 當外部觸外訊號至Port1時產生中斷，並將結果顯示於Port2
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KBI 功能使用方法
4.9 EEI 使用組合語言的範例程式
Description
Main program
//此範例應用包括
;=========================================================================
;
;
S Y N C M O S T E C H N O L O G Y
;
;=========================================================================
;Keyboard level selector register
sfr KBLS
= 0x93;
;Keyboard input enable register
sfr KBE = 0x94;
;Keyboard interrupt flag register
sfr KBF = 0x95;
sfr P1
= 0x90;
sfr P2
= 0xA0;
sfr IEN0
= 0xA8;
sfr IEN1
= 0xB8;
;sfr
IEN2
= 0x9A;
sfr IRCON
= 0xC0;
ORG
0000H
JMP
BEGIN
ORG
005BH
JMP
EEI_INT
;==================================================
;EEI INTERRUPT INIT ROUTINE
;==================================================
BEGIN:
;
MOV
P1,
#00H
;
MOV
IEN0,
#80H
;EA =1
MOV
IEN1,
#08H
;IEEEI =1
;
MOV
IEN2,
#00H
;
MOV
KBLS,
#0FFH
;High level detect
;
MOV
KBLS,
#000H
;Low level detect
MOV
KBE,
#0FFH
;EEI all pin enable
MOV
KBF,
#00H
;EEI all flag clear
JMP START
;==================================================
;MAIN
;==================================================
START:
JMP START
;==================================================
;EEI INTERRUPT ROUTINE
;==================================================
EEI_INT:
MOV
P2,
KBF
MOV
KBF,
#00H
ANL
IRCON, #08H
RETI
END
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KBI 功能使用方法
4.10 EEI 使用 C 語言的範例說明(4x4 按鍵掃描)
4.10.1 硬體以SM59R16A2開發板(SDB0001B)為例，或可參考開發板電路自行製作。
4.10.2 原本開發板的KEYPAD.0~7是接到Port5.0~7，只要依序接至Port1.0~7即可。
4.10.3 副程式Init_EEI(void)中，只有致能Port1.4~7為EEI功能，Port1.0~3仍為GPIO使用。
4.10.4 當按下鍵盤時，即觸發中斷副程式EEI_ISR(void)，程式中將根據KBF及shift即可顯示該數值，
亦可將main(void)中for迴圈寫在timer中，提升系統的效率。
圖. SM59R16A2 開發板 SDB0001B 4x4 鍵盤電路圖
4.11 EEI 使用 C 語言的範例程式(4x4 按鍵掃描)
Description
Main program
//====================================================================
//
//
S Y N C M O S T E C H N O L O G Y
//
//====================================================================
//====================================================================
//INCLUDE FILES
//====================================================================
#include "..\h\SM59R16A2.h"
#include "..\h\SM59R16A2_ExtraDef.h"
#include "..\MISC\delay.h"
//====================================================================
//EEI INTERRUPT FLAG, MUST CLEAR BY SOFTWARE
//====================================================================
sbit IRCON_EEIIF = IRCON^3;
unsigned char code arr[4] = {0xFE,0xFD, 0xFB, 0xF7 };
unsigned char shift=0;
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KBI 功能使用方法
//====================================================================
//EEI INTERRUPT SUBROUTINE
//INTERRUPT NUM.11 = INTERRUPT VECTOR ADDR 0x5B
//====================================================================
void EEI_ISR(void) interrupt 11
//INTERRUPT VECTOR ADDR 0x5B
{
/*KeypadTable[]={
0x11, 0x21, 0x41, 0x81,
// 1 2 3 4
0x12, 0x22, 0x42, 0x82,
// 5 6 7 8
0x13, 0x23, 0x43, 0x83,
// 9 10 11 12
0x14, 0x24, 0x44, 0x84
// 13 14 15 16
};*/
switch(KBF+shift)
// Keyboard Flag
{
case 0x11:
P2 = 1;
break;
case 0x21:
P2 = 2;
break;
case 0x41:
P2 = 3;
break;
case 0x81:
P2 = 4;
break;
case 0x12:
P2 = 5;
break;
case 0x22:
P2 = 6;
break;
case 0x42:
P2 = 7;
break;
case 0x82:
P2 = 8;
break;
case 0x13:
P2 = 9;
break;
case 0x23:
P2 = 0x10;
break;
case 0x43:
P2 = 0x11;
break;
case 0x83:
P2 = 0x12;
break;
case 0x14:
P2 = 0x13;
break;
case 0x24:
P2 = 0x14;
break;
case 0x44:
P2 = 0x15;
break;
case 0x84:
P2 = 0x16;
break;
default:
P2 = 0x00;
break;
}
Delay10mSec(2);
//P2 = KBF+shift;
P2 = 0x00;
//clear status
KBF = 0x00;
//clear KBF flag
IRCON_EEIIF = 0;
//clear EEI flag
}
//====================================================================
//EEI INTERRUPT INITIALIZE
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KBI 功能使用方法
//====================================================================
void Init_EEI(void)
{
//Keyboard level selector register
KBLS = 0x00;
//Detect_Lo_level;
//KBLS = 0xff;
//Detect_Hi_level;
//Keyboard input enable register
//KBE
= 0x00;
//enable standard I/O pin
//KBE
= 0xff;
//enable EEI.KBF to generate interrupt
KBE = 0xf0;
//
IEN0 = 0x80;
//enable all interrupt
IEN1 = 0x08;
//enable EEI interrupt
KBF = 0x00;
//clear KBF flag
IRCON_EEIIF = 0;
//clear EEI flag
}
void main(void)
{
Init_EEI();
P2 = 0x00;
//clear status
while(1)
{
for(shift=0;shift<4;shift++)
{
P1 = arr[shift];
}
}
}
Specifications subject to change without notice, contact your sales representatives for the most recent information.
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15
Ver. A 2010/07