timer.asm

holtech bar code reader 汇编程序

;;Established date:                  2005/09/01

;;********************************************************************
;;transmit data from HT82M99E to MCU device
SBR_USBToMCU:
		SET            F_TimerInterruptEnable
		SNZ            INTC.3
		CLR            F_TimerInterruptEnable
		CLR            INTC.3
		
		MOV            A,R_FIFOBAK0                     
		MOV            R_OutputReportDataSize,A           
		MOV            A,OFFSET R_FIFOBAK1
		MOV            MP0,A
L_USBToMCU:
		MOV            A,r0
		CALL           SBR_TransmitToMCUDevice
		INC            MP0
		SDZ            R_OutputReportDataSize
		JMP            L_USBToMCU
;		MOV            A,0FFFH
;		MOV            R_OutputReportDataSize,A
		SZ             F_TimerInterruptEnable
		SET            INTC.3
		RET
;;********************************************************************
;;receive data from MCU TO HT82M99E for test
ISR_Timer1:
		SZ             PB.2
		RETI
		SZ             PB.2                            
		RETI
		MOV            R_AccTimer,A
		MOV            A,STATUS
		MOV            R_StatusTimer,A		
		MOV            A,MP0
		MOV            R_MP0Timer,A
				
;		INC	       R_TestCounter	
;		SNZ	       R_TestCounter.4
;		JMP	       NOT_SEND_DATA
;		CLR	       R_TestCounter		
		
		MOV            A,LOW Table_TestCode
		MOV            TBLP,A
		MOV            A,OFFSET R_ReceiveBuffer
		MOV            MP0,A
		
LOOP_READTEST:
		TABRDL	       R0
		INC	       MP0
		INC            TBLP
		MOV            A,TBLH
		AND            A,00111111B
		XOR            A,3FH
		SNZ            Z  		
		JMP	       LOOP_READTEST	
		SET	       F_DataReady
NOT_SEND_DATA:
		CLR            TMR1C.4
		CLR            INTC.6                           
		MOV            A,R_MP0Timer
		MOV            MP0,A		
		MOV            A,R_StatusTimer
		MOV            STATUS,A
		MOV            A,R_AccTimer
		SET            TMR1C.4
		RETI
;;********************************************************************
;;receive data from MCU TO HT82M99E
ISR_Timer:
		SZ             PB.2
		RETI
		SZ             PB.2                            
		RETI
		MOV            R_AccTimer,A
		MOV            A,STATUS
		MOV            R_StatusTimer,A		
		MOV            A,MP0
		MOV            R_MP0Timer,A

		MOV	       A,0FFH
		MOV	       R_ReadWatch_L,A
		MOV	       A,00bH
		MOV	       R_ReadWatch_H,A  	;1ms
				
Wait_PB_2High_Start:		
		SDZ            R_ReadWatch_L
		JMP	       No_Time_out0
		SDZ	       R_ReadWatch_H
		JMP	       No_Time_out0
		JMP	       Wrong_packet_read
No_Time_out0:
		SNZ	       PB.2		
		JMP	       Wait_PB_2High_start
		SNZ	       PB.2		
		JMP	       Wait_PB_2High_start   ;wait high
		
		MOV	       A,PA
		SUB            A,0AAH             ;packet start flag
		SNZ	       Z
		JMP	       Wrong_packet_read
		
		MOV	       A,09H
		MOV	       R_ReadCounter,A
			
		MOV            A,OFFSET R_ReceiveBuffer
		MOV            MP0,A
		
Loop_Read_Next_Data:
		MOV	       A,0FFH     
		MOV	       R_ReadWatch_L,A  ;85us
Wait_PB_2Low_1:
		SDZ            R_ReadWatch_L
		JMP	       No_Time_out1
		JMP	       Wrong_packet_read
No_Time_out1:		
		SZ	       PB.2
		JMP	       Wait_PB_2Low_1
		SZ	       PB.2
		JMP	       Wait_PB_2Low_1		
		
		MOV	       A,0FFH
		MOV	       R_ReadWatch_L,A  ;85us
Wait_PB_2High_1:
		SDZ            R_ReadWatch_L
		JMP	       No_Time_out2
		JMP	       Wrong_packet_read
No_Time_out2:
		SNZ	       PB.2
		JMP	       Wait_PB_2High_1
		SNZ	       PB.2
		JMP	       Wait_PB_2High_1
		MOV	       A,PA
		MOV	       R0,A
		INC 	       MP0
		
		SDZ	       R_ReadCounter
		JMP	       Loop_Read_Next_Data
		
		MOV            A,R_ReceiveBuffer_last    ;;Check packet last flag 0xbb
		SUB	       A,0BBH
		SNZ	       Z
		JMP            Wrong_packet_read
	
		SET	       F_DataReady
Wrong_packet_read:
		CLR            TMR1C.4
		CLR            INTC.6                           
		MOV            A,R_MP0Timer
		MOV            MP0,A		
		MOV            A,R_StatusTimer
		MOV            STATUS,A
		MOV            A,R_AccTimer
		SET            TMR1C.4
		RETI
;;********************************************************************
SBR_TransmitToMCUDevice:                              

		RET
;;********************************************************************


;;********************************************************************

SBR_ClearFIFOBAK:
		CLR            R_FIFOBAK0
		CLR            R_FIFOBAK1
		CLR            R_FIFOBAK2
		CLR            R_FIFOBAK3
		CLR            R_FIFOBAK4
		CLR            R_FIFOBAK5
		CLR            R_FIFOBAK6
		CLR            R_FIFOBAK7
		RET
;;********************************************************************