Keyboard input/Flush the keyboard buffer: Difference between revisions
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Add task to ARM assembly Raspberry pi |
add task to ARM64 assembly Raspberry Pi |
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=={{header|AArch64 Assembly}}== |
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{{works with|as|Raspberry Pi 3B version Buster 64 bits}} |
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<lang AArch64 Assembly> |
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/* ARM assembly AARCH64 Raspberry PI 3B */ |
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/* program keyboardInput64.s */ |
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/*******************************************/ |
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/* Constantes file */ |
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/*******************************************/ |
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/* for this file see task include a file in language AArch64 assembly*/ |
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.include "../includeConstantesARM64.inc" |
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.equ IOCTL, 0x1D // Linux syscall |
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.equ SIGACTION, 0x86 // Linux syscall |
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.equ SYSPOLL, 0x16 // Linux syscall |
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.equ CREATPOLL, 0x14 // Linux syscall |
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.equ CTLPOLL, 0x15 // Linux syscall |
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.equ TCGETS, 0x5401 |
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.equ TCSETS, 0x5402 |
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.equ ICANON, 2 |
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.equ ECHO, 10 |
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.equ POLLIN, 1 |
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.equ EPOLL_CTL_ADD, 1 |
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.equ SIGINT, 2 // Issued if the user sends an interrupt signal (Ctrl + C) |
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.equ SIGQUIT, 3 // Issued if the user sends a quit signal (Ctrl + D) |
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.equ SIGTERM, 15 // Software termination signal (sent by kill by default) |
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.equ SIGTTOU, 22 // |
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.equ BUFSIZE, 80 |
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/*******************************************/ |
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/* Structures */ |
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/********************************************/ |
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/* structure termios see doc linux*/ |
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.struct 0 |
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term_c_iflag: // input modes |
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.struct term_c_iflag + 4 |
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term_c_oflag: // output modes |
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.struct term_c_oflag + 4 |
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term_c_cflag: // control modes |
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.struct term_c_cflag + 4 |
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term_c_lflag: // local modes |
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.struct term_c_lflag + 4 |
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term_c_cc: // special characters |
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.struct term_c_cc + 20 // see length if necessary |
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term_fin: |
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/* structure sigaction see doc linux */ |
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.struct 0 |
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sa_handler: |
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.struct sa_handler + 8 |
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sa_mask: |
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.struct sa_mask + 8 |
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sa_flags: |
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.struct sa_flags + 8 |
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sa_sigaction: |
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.struct sa_sigaction + 8 |
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sa_fin: |
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/* structure poll see doc linux */ |
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.struct 0 |
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poll_event: |
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.struct poll_event + 8 |
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poll_fd: // File Descriptor |
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.struct poll_fd + 8 |
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poll_fin: |
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/*********************************/ |
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/* Initialized data */ |
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/*********************************/ |
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.data |
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szMessPgmOk: .asciz "End program OK.\n" |
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szMessErreur: .asciz "Error detected.\n" |
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szCarriageReturn: .asciz "\n" |
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szMessCodeErr: .asciz "Error code décimal : @ \n" |
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/*********************************/ |
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/* UnInitialized data */ |
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/*********************************/ |
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.bss |
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.align 4 |
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iEnd: .skip 8 // 0 loop 1 = end loop |
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iTouche: .skip BUFSIZE // value key pressed |
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stOldtio: .skip term_fin // old terminal state |
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stCurtio: .skip term_fin // current terminal state |
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stSigAction: .skip sa_fin // area signal structure |
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stSigAction1: .skip sa_fin |
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stSigAction2: .skip sa_fin |
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stSigAction3: .skip sa_fin |
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stevents: .skip 16 |
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sZoneConv: .skip 24 |
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szBuffer: .skip BUFSIZE |
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/*********************************/ |
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/* code section */ |
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/*********************************/ |
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.text |
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.global main |
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main: // entry of program |
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bl initTerm // terminal init |
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cmp x0,0 // error ? |
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blt 100f |
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bl initPoll // epoll instance init |
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cmp x0,0 |
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blt 100f |
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mov x22,x0 // save epfd |
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mov x20,0 // indice |
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ldr x21,qAdrszBuffer |
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1: |
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mov x0,x22 // epfd |
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bl waitKey |
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cmp x0,0 |
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beq 1b // no ket pressed -> loop |
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blt 3f // error ? |
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bl readKey // read one key |
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cmp x0,3 // ctrl-C |
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beq 3f |
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cmp x0,113 // saisie q (quit) ? |
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beq 3f |
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cmp x0,81 // saisie Q (Quit)? |
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beq 3f |
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cmp x0,0xD // <enter> ? |
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beq 2f |
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strb w0,[x21,x20] // store byte in buffer |
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add x20,x20,1 // increment indice |
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b 1b // and loop |
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2: // display buffer |
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mov x0,0 // store 0 final |
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strb w0,[x21,x20] |
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mov x0,x21 // display buffer |
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bl affichageMess |
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ldr x0,qAdrszCarriageReturn |
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bl affichageMess |
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mov x20,0 |
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b 1b // and loop for other entry |
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3: |
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bl restauTerm // terminal restaur |
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ldr x0,qAdrszMessPgmOk // display end message |
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bl affichageMess |
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100: // standard end of the program |
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mov x0,0 // return code |
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mov x8,EXIT // request to exit program |
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svc 0 // perform the system call |
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qAdrszBuffer: .quad szBuffer |
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qAdrstevents: .quad stevents |
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qAdrszMessErreur: .quad szMessErreur |
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qAdrszCarriageReturn: .quad szCarriageReturn |
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qAdrstOldtio: .quad stOldtio |
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qAdrstCurtio: .quad stCurtio |
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qAdrstSigAction: .quad stSigAction |
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qAdrstSigAction1: .quad stSigAction1 |
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qAdrszMessPgmOk: .quad szMessPgmOk |
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qAdrSIG_IGN: .quad 1 |
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qAdriEnd: .quad iEnd |
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qAdriTouche: .quad iTouche |
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/*********************************/ |
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/* init terminal state */ |
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/*********************************/ |
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initTerm: |
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stp x1,lr,[sp,-16]! // save registers |
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/* read terminal state */ |
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mov x0,STDIN // input console |
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mov x1,TCGETS |
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ldr x2,qAdrstOldtio |
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mov x8,IOCTL // call system Linux |
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svc 0 |
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cbnz x0,98f // error ? |
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adr x0,sighandler // adresse routine traitement signal |
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ldr x1,qAdrstSigAction // adresse structure sigaction |
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str x0,[x1,sa_handler] // maj handler |
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mov x0,SIGINT // signal type |
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ldr x1,qAdrstSigAction |
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mov x2,0 |
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mov x3,8 |
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mov x8,SIGACTION // call system |
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svc 0 |
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cmp x0,0 // error ? |
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bne 98f |
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mov x0,SIGQUIT |
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ldr x1,qAdrstSigAction |
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mov x2,0 // NULL |
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mov x8,SIGACTION // call system |
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svc 0 |
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cmp x0,0 // error ? |
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bne 98f |
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mov x0,SIGTERM |
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ldr x1,qAdrstSigAction |
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mov x2,0 // NULL |
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mov x8,SIGACTION // appel systeme |
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svc 0 |
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cmp x0,0 |
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bne 98f |
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// |
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adr x0,qAdrSIG_IGN // address signal igonre function |
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ldr x1,qAdrstSigAction1 |
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str x0,[x1,sa_handler] |
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mov x0,SIGTTOU //invalidate other process signal |
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ldr x1,qAdrstSigAction1 |
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mov x2,0 // NULL |
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mov x8,SIGACTION // call system |
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svc 0 |
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cmp x0,0 |
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bne 98f |
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// |
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/* read terminal current state */ |
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mov x0,STDIN |
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mov x1,TCGETS |
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ldr x2,qAdrstCurtio // address current termio |
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mov x8,IOCTL // call systeme |
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svc 0 |
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cmp x0,0 // error ? |
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bne 98f |
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mov x2,ICANON | ECHO // no key pressed echo on display |
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mvn x2,x2 // and one key |
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ldr x1,qAdrstCurtio |
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ldr x3,[x1,#term_c_lflag] |
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and x3,x2,x2 // add flags |
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str x3,[x1,#term_c_lflag] // and store |
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mov x0,STDIN // maj terminal current state |
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mov x1,TCSETS |
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ldr x2,qAdrstCurtio |
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mov x8,IOCTL // call system |
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svc 0 |
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cbz x0,100f |
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98: // error display |
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ldr x1,qAdrszMessErreur // error message |
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bl displayError |
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mov x0,-1 |
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100: |
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ldp x1,lr,[sp],16 // restaur 2 registers |
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ret // return to address lr x30 |
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qAdrstSigAction2: .quad stSigAction2 |
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qAdrstSigAction3: .quad stSigAction3 |
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/*********************************/ |
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/* init instance epool */ |
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/*********************************/ |
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initPoll: |
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stp x1,lr,[sp,-16]! // save registers |
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ldr x0,qAdrstevents |
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mov x1,STDIN // maj structure events |
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str x1,[x0,#poll_fd] // maj FD |
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mov x1,POLLIN // action code |
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str x1,[x0,#poll_event] |
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mov x0,0 |
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mov x8,CREATPOLL // create epoll instance |
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svc 0 |
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cmp x0,0 // error ? |
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ble 98f |
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mov x10,x0 // return FD epoll instance |
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mov x1,EPOLL_CTL_ADD |
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mov x2,STDIN // Fd to we want add |
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ldr x3,qAdrstevents // structure events address |
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mov x8,CTLPOLL // call system control epoll |
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svc 0 |
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cmp x0,0 // error ? |
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blt 98f // no |
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mov x0,x10 // return FD epoll instance |
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b 100f |
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98: // error display |
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ldr x1,qAdrszMessErreur // error message |
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bl displayError |
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mov x0,-1 |
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100: |
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ldp x1,lr,[sp],16 // restaur 2 registers |
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ret // return to address lr x30 |
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/*********************************/ |
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/* wait key */ |
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/*********************************/ |
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/* x0 contains FD poll */ |
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waitKey: |
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stp x1,lr,[sp,-16]! // save registers |
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ldr x11,qAdriTouche // key address |
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str xzr,[x11] // raz key |
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1: |
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ldr x10,qAdriEnd // if signal ctrl-c -> end |
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ldr x10,[x10] |
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cbnz x10,100f |
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ldr x1,qAdrstevents |
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mov x2,12 // size events |
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mov x3,1 // timeout = 1 TODO: ?? |
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mov x4,0 |
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mov x8,SYSPOLL // call system wait POLL |
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svc 0 |
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cmp x0,0 // key pressed ? |
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bge 100f |
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98: // error display |
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ldr x1,qAdrszMessErreur // error message |
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bl displayError |
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mov x0,-1 |
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100: |
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ldp x1,lr,[sp],16 // restaur 2 registers |
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ret // return to address lr x30 |
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/*********************************/ |
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/* read key */ |
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/*********************************/ |
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/* x0 returns key value */ |
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readKey: |
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stp x1,lr,[sp,-16]! // save registers |
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mov x0,STDIN // File Descriptor |
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ldr x1,qAdriTouche // buffer address |
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mov x2,BUFSIZE // buffer size |
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mov x8,READ // read key |
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svc #0 |
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cmp x0,0 // error ? |
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ble 98f |
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ldr x2,qAdriTouche // key address |
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ldr x0,[x2] |
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b 100f |
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98: // error display |
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ldr x1,qAdrszMessErreur // error message |
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bl displayError |
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100: |
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ldp x1,lr,[sp],16 // restaur 2 registers |
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ret // return to address lr x30 |
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/*********************************/ |
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/* restaur terminal state */ |
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/*********************************/ |
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restauTerm: |
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stp x1,lr,[sp,-16]! // save registers |
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mov x0,STDIN // end then restaur begin state terminal |
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mov x1,TCSETS |
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ldr x2,qAdrstOldtio |
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mov x8,IOCTL // call system |
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svc 0 |
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cbz x0,100f |
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ldr x1,qAdrszMessErreur // error message |
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bl displayError |
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100: |
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ldp x1,lr,[sp],16 // restaur 2 registers |
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ret // return to address lr x30 |
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/******************************************************************/ |
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/* signal processing */ |
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/******************************************************************/ |
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sighandler: |
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stp x1,lr,[sp,-16]! // save registers |
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ldr x0,qAdriEnd |
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mov x1,#1 // maj zone end |
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str x1,[x0] |
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ldp x1,lr,[sp],16 // restaur 2 registers |
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ret // return to address lr x30 |
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/******************************************************************/ |
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/* display error message */ |
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/******************************************************************/ |
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/* x0 contains error code */ |
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/* x1 contains address error message */ |
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displayError: |
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stp x2,lr,[sp,-16]! // save registers |
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mov x2,x0 // save error code |
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mov x0,x1 // display message error |
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bl affichageMess |
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mov x0,x2 |
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ldr x1,qAdrsZoneConv // conversion error code |
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bl conversion10S // decimal conversion |
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ldr x0,qAdrszMessCodeErr |
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ldr x1,qAdrsZoneConv |
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bl strInsertAtCharInc // insert result at @ character |
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bl affichageMess // display message final |
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ldp x2,lr,[sp],16 // restaur 2 registers |
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ret // return to address lr x30 |
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qAdrsZoneConv: .quad sZoneConv |
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qAdrszMessCodeErr: .quad szMessCodeErr |
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/********************************************************/ |
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/* File Include fonctions */ |
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/********************************************************/ |
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/* for this file see task include a file in language AArch64 assembly */ |
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.include "../includeARM64.inc" |
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</lang> |
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{{output}} |
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<pre> |
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abcdefg |
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help |
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kk |
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End program OK. |
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</pre> |
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=={{header|Ada}}== |
=={{header|Ada}}== |