Buffer et pointeurs

Salut à tous!
J'ai un soucis avec cette fonction: en executant les commandes "W" "R" ou "T" il se trouve que mon tampon UartRxPBuffer contient toujours des données ce que je voudrais eviter mais je sais pas trop comment l'aborder l implementation qui puisse me permettre de controller le contenu de ce buffer lorsque je fais un "W" ou un "R" ou "T".
De preference j'aimerais avoir un truc comme ceci UartRxBuffer[0]=='W'
....
UartRxBuffer[0]=='R'
....
UartRxBuffer[0]=='T'

Code:

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char xdata UartRxBuffer[512]; char UartRxPtr; char UART1_Parse(void) { char SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page char c = 0; SFRPAGE = UART1_PAGE; // Je precise c'est ici que je devrais initialiser autrement mon pointeur // UartRxPtr afin que lorsque j'invoque la commande W ou R mon buffer //puisse être vide if(RI1){ UartRxBuffer[UartRxPtr++] = c = SBUF1; if(UartRxPtr >= sizeof(UartRxBuffer)) UartRxPtr = sizeof(UartRxBuffer)-1; RI1 = 0; } SFRPAGE = SFRPAGE_SAVE; return (c); } int GetHex(void) { int value = 0; char c; do{ c = UartRxBuffer[UartRxPtr++]; if(c>='0' && c<='9') value *= 16, value += c - '0'; if(c>='A' && c<='F') value *= 16, value += c - 'A' + 10; } while(c >= '0'); return value; } void SkipRaw(void) { while(UartRxBuffer[UartRxPtr] <= '0' && UartRxPtr<sizeof(UartRxBuffer)) UartRxPtr++; } extern MACADDRESS xdata DESTMAC; void CommandParse(void) { unsigned int Addr; unsigned int Value; char c; c = UART1_Parse(); if(c) putchar(c); if(c!=0x0d) return; UartRxPtr = 0; switch(UartRxBuffer[0]){ case 'W': UartRxPtr++; SkipRaw(); Addr = GetHex(); SkipRaw(); Value = GetHex(); MAC_Write(Addr, Value); printf("\nOK\n"); break; case 'R': UartRxPtr++; SkipRaw(); Addr = GetHex(); Value = MAC_Read(Addr); printf("\n%04x = %04x\n", Addr, Value); break; case 'T': UartRxPtr++; SkipRaw(); CP220x_Send(&DESTMAC, UartRxBuffer, sizeof(UartRxBuffer) - UartRxPtr, IP_PACKET); printf("\nOK\n"); break; default : printf("\nERROR\n"); break; } UartRxPtr = 0; }

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Dans la fonction CommandParse comment implementer les commandes differement en faisant un truc de la sorte:

Code:

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while (len buffer !=0) if UartRxBuffer[0] =='R' elseif UartRxBuffer[0] =='W' elseif UartRxBuffer[0] =='T'

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Merci pour vos eclaircissements

Citation:

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Envoyé par bentley71de

J'ai un soucis avec cette fonction:

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Moi aussi

Code:

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-------------- Build: Debug in hello ---------------   Compiling: main.c C:\dev\hello\main.c:2: error: syntax error before "UartRxBuffer" C:\dev\hello\main.c:2: warning: type defaults to `int' in declaration of `UartRxBuffer' C:\dev\hello\main.c:2: warning: data definition has no type or storage class C:\dev\hello\main.c: In function `UART1_Parse': C:\dev\hello\main.c:7: error: `SFRPAGE' undeclared (first use in this function) C:\dev\hello\main.c:7: error: (Each undeclared identifier is reported only once C:\dev\hello\main.c:7: error: for each function it appears in.) C:\dev\hello\main.c:10: error: `UART1_PAGE' undeclared (first use in this function) C:\dev\hello\main.c:13: error: `RI1' undeclared (first use in this function) C:\dev\hello\main.c:14: warning: array subscript has type `char' C:\dev\hello\main.c:14: error: `SBUF1' undeclared (first use in this function) C:\dev\hello\main.c:15: warning: comparison between signed and unsigned C:\dev\hello\main.c:15: warning: overflow in implicit constant conversion C:\dev\hello\main.c: In function `GetHex': C:\dev\hello\main.c:33: warning: array subscript has type `char' C:\dev\hello\main.c: In function `SkipRaw': C:\dev\hello\main.c:46: warning: array subscript has type `char' C:\dev\hello\main.c:46: warning: comparison between signed and unsigned C:\dev\hello\main.c: At top level: C:\dev\hello\main.c:50: error: syntax error before "xdata" C:\dev\hello\main.c:50: warning: type defaults to `int' in declaration of `DESTMAC' C:\dev\hello\main.c:50: warning: data definition has no type or storage class C:\dev\hello\main.c: In function `CommandParse': C:\dev\hello\main.c:60: warning: implicit declaration of function `putchar' C:\dev\hello\main.c:73: warning: implicit declaration of function `MAC_Write' C:\dev\hello\main.c:74: warning: implicit declaration of function `printf' C:\dev\hello\main.c:81: warning: implicit declaration of function `MAC_Read' C:\dev\hello\main.c:88: warning: implicit declaration of function `CP220x_Send' C:\dev\hello\main.c:88: error: `IP_PACKET' undeclared (first use in this function) Process terminated with status 1 (0 minutes, 0 seconds) 9 errors, 15 warnings

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Essaye de poster du code qui compile...

SAlut
Il m'est un peu difficile de poster tous le code car il fait partie d'un gros projet contenant un dizaines de fichiers.
Voilà j'ai pu avancer un tout petit peu, mais il se trouve que dans mon debugging je n'arrive pas à entrer dans le switch de ma fonction CommandParse.
Le but est de tester un systeme embarqué à travers un simple protocole de commande via hyperterminal (W= write register, read register T transmit)

En fait je ne sais pas comment tester la valeur de "c" afin de controller qu'elle contienne bien les valeur W R ou T.Qui sont les commandes avec lesquelles je gère la communication de mon systeme embarqué.

Je met ici le code entier de mon fichier dans lequel je precise la partie modifier par moi.

Code:

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//----------------------------------------------------------------------------- // F12x_Init.c //------------------------------------------------------------------- //----------------------------------------------------------------------------- // Includes //----------------------------------------------------------------------------- #include "global.h" #if(MCU == F120) //----------------------------------------------------------------------------- // 16-bit SFR Definitions for 'F12x //----------------------------------------------------------------------------- sfr16 DP = 0x82; // data pointer sfr16 ADC0 = 0xbe; // ADC0 data sfr16 ADC0GT = 0xc4; // ADC0 greater than window sfr16 ADC0LT = 0xc6; // ADC0 less than window sfr16 RCAP2 = 0xca; // Timer2 capture/reload sfr16 RCAP3 = 0xca; // Timer3 capture/reload sfr16 RCAP4 = 0xca; // Timer4 capture/reload sfr16 TMR2 = 0xcc; // Timer2 sfr16 TMR3 = 0xcc; // Timer3 sfr16 TMR4 = 0xcc; // Timer4 sfr16 DAC0 = 0xd2; // DAC0 data sfr16 DAC1 = 0xd2; // DAC1 data sfr16 PCA0CP5 = 0xe1; // PCA0 Module 5 capture sfr16 PCA0CP2 = 0xe9; // PCA0 Module 2 capture sfr16 PCA0CP3 = 0xeb; // PCA0 Module 3 capture sfr16 PCA0CP4 = 0xed; // PCA0 Module 4 capture sfr16 PCA0 = 0xf9; // PCA0 counter sfr16 PCA0CP0 = 0xfb; // PCA0 Module 0 capture sfr16 PCA0CP1 = 0xfd; // PCA0 Module 1 capture //----------------------------------------------------------------------------- // Local Constants //----------------------------------------------------------------------------- #define SYSCLK 98000000 // System Clock in Hz //----------------------------------------------------------------------------- // Local Global Variables //----------------------------------------------------------------------------- static unsigned int timeout; //----------------------------------------------------------------------------- // Exported Function Prototypes //----------------------------------------------------------------------------- void Reset_Init(void); void wait_ms(int ms); void clear_ms_timer_flag(void); char get_ms_timer_flag(void); void start_ms_timer(); void CP220x_RST_Low(void); void CP220x_RST_High(void); unsigned char AB4_RST_State(void); #if(UART_ENABLED) char _getkey (); char putchar (char c); #endif //----------------------------------------------------------------------------- // Local Function Prototypes //----------------------------------------------------------------------------- void PORT_Init (void); void SYSCLK_Init (void); void EMIF_Init (void); #if(UART_ENABLED) void UART1_Init (void); void vBufferClear( void );// ajouter par moi #endif //----------------------------------------------------------------------------- // Exported Functions //----------------------------------------------------------------------------- //----------------------------------------------------------------------------- // Reset_Init //----------------------------------------------------------------------------- void Reset_Init(void) { // Enable the VDD Monitor as a reset source // Do not use read-modify write instruction on this register RSTSRC = 0x02; // Disable Watchdog Timer WDTCN = 0xde; WDTCN = 0xad; // Initialize the MCU PORT_Init(); SYSCLK_Init(); EMIF_Init(); EX0 = 1; // Enable External Interrupt 0 #if(UART_ENABLED) UART1_Init(); puts("\n*** Reset ***\nC8051F12x MCU Initialized\n"); #endif } //----------------------------------------------------------------------------- // External Interrupt 0 //----------------------------------------------------------------------------- // // This interrupt service routine is routed to the ethernet interrupt // void INT0_ISR(void) interrupt 0 { Ethernet_ISR(); } //----------------------------------------------------------------------------- // wait_ms //----------------------------------------------------------------------------- // // This routine inserts a delay of <ms> milliseconds. // void wait_ms(int ms) { char SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = TMR2_PAGE; TMR2CN = 0x00; // Stop Timer2; Clear TF2; TMR2CF = 0x00; // use SYSCLK/12 as timebase RCAP2 = -(SYSCLK/1000/12); // Timer 2 overflows at 1 kHz TMR2 = RCAP2; ET2 = 0; // Disable Timer 2 interrupts TR2 = 1; // Start Timer 2 while(ms){ TF2 = 0; while(!TF2); // wait until timer overflows ms--; // decrement ms } TR2 = 0; // Stop Timer 2 SFRPAGE = SFRPAGE_SAVE; // Restore SFRPAGE } //----------------------------------------------------------------------------- // reset_timout //----------------------------------------------------------------------------- // // This routine resets the global timeout. // void reset_timeout(unsigned int ms) { timeout = ms; start_ms_timer(); } //----------------------------------------------------------------------------- // timeout_expired //----------------------------------------------------------------------------- // // This routine manages the timeout and returns TRUE if timeout expired. // unsigned char timeout_expired(void) { if(get_ms_timer_flag()){ clear_ms_timer_flag(); if(timeout > 0){ timeout--; } } return (timeout == 0); } //----------------------------------------------------------------------------- // start_ms_timer //----------------------------------------------------------------------------- // // This routine starts a timer with a 1kHz overflow rate (1ms period). // void start_ms_timer() { char SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = TMR2_PAGE; TMR2CN = 0x00; // Stop Timer2; Clear TF2; TMR2CF = 0x00; // use SYSCLK/12 as timebase RCAP2 = -(SYSCLK/1000/12); // Timer 2 overflows at 1 kHz TMR2 = RCAP2; ET2 = 0; // Disable Timer 2 interrupts TR2 = 1; // Start Timer 2 SFRPAGE = SFRPAGE_SAVE; // Restore SFRPAGE } //----------------------------------------------------------------------------- // get_ms_timer_flag() //----------------------------------------------------------------------------- // // This routine returns the state of the ms_timer overflow flag. // char get_ms_timer_flag(void) { char SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = TMR2_PAGE; return TF2; SFRPAGE = SFRPAGE_SAVE; // Restore SFRPAGE } //----------------------------------------------------------------------------- // clear_ms_timer_flag() //----------------------------------------------------------------------------- // // This routine returns the state of the ms_timer overflow flag. // void clear_ms_timer_flag(void) { char SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = TMR2_PAGE; TF2 = 0; SFRPAGE = SFRPAGE_SAVE; // Restore SFRPAGE } //----------------------------------------------------------------------------- // CP220x_RST_Low //----------------------------------------------------------------------------- // // Drives the CP220x's Reset Pin Low. // void CP220x_RST_Low(void) { char SFRPAGE_SAVE = SFRPAGE; SFRPAGE = CONFIG_PAGE; P4 &= ~0x20; // Set P4.5 Low SFRPAGE = SFRPAGE_SAVE; } //----------------------------------------------------------------------------- // CP220x_RST_High //----------------------------------------------------------------------------- // // Drives the CP220x's Reset Pin High. // void CP220x_RST_High(void) { char SFRPAGE_SAVE = SFRPAGE; SFRPAGE = CONFIG_PAGE; P4 |= 0x20; // Set P4.5 High SFRPAGE = SFRPAGE_SAVE; } //----------------------------------------------------------------------------- // AB4_RST_State //----------------------------------------------------------------------------- // // Returns the state of the AB4's reset pin. // unsigned char AB4_RST_State(void) { char rst_pin_state; char SFRPAGE_SAVE = SFRPAGE; SFRPAGE = CONFIG_PAGE; rst_pin_state = P4 & 0x20; // Get P4.5 State SFRPAGE = SFRPAGE_SAVE; return rst_pin_state; } //----------------------------------------------------------------------------- // Local Initialization Routines //----------------------------------------------------------------------------- //----------------------------------------------------------------------------- // PORT_Init //----------------------------------------------------------------------------- // // Configure UART1, Interrupts, Crossbar and GPIO ports // void PORT_Init (void) { char SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = CONFIG_PAGE; // set SFR page P0MDOUT |= 0x01; // set TX1 to push-pull P1MDOUT |= 0x40; // Set P1.6(TB_LED) to push-pull P2MDOUT |= 0x0C; // Set P2.2(AB4_LED1) and P2.3(AB4_LED2) // to push-pull // all pins used by the external memory interface are in push-pull mode P4MDOUT = 0xC0; P5MDOUT = 0xFF; P6MDOUT = 0xFF; P7MDOUT = 0xFF; P4 = 0xDF; // /WR, /RD, are high, RESET is low P5 = 0xFF; P6 = 0xFF; // P5, P6 contain the address lines P7 = 0xFF; // P7 contains the data lines TCON &= ~0x01; // Make /INT0 level triggered // Enable UART0, CP0, and /INT0. This puts /INT0 on P0.3. XBR0 = 0x80; XBR1 = 0x04; XBR2 = 0x44; SFRPAGE = SFRPAGE_SAVE; // Restore SFR page } //----------------------------------------------------------------------------- // SYSCLK_Init //----------------------------------------------------------------------------- // // This routine initializes the system clock. // void SYSCLK_Init (void) { int i; // software timer char SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = CONFIG_PAGE; // set SFR page OSCICN = 0x83; // set internal oscillator to run // at its maximum frequency CLKSEL = 0x00; // Select the internal osc. as // the SYSCLK source //Turn on the PLL and increase the system clock by a factor of M/N PLL0CN = 0x00; // Set internal osc. as PLL source SFRPAGE = LEGACY_PAGE; FLSCL = 0x30; // Set FLASH read time for 100 MHz clk SFRPAGE = CONFIG_PAGE; PLL0CN |= 0x01; // Enable Power to PLL PLL0DIV = 0x01; // Set Pre-divide value to N (N = 1) PLL0MUL = 0x04; // Multiply SYSCLK by M (M=4) PLL0FLT = 0x01; // Set the PLL filter register for // a reference clock from 12.2 - 19.5 MHz // and an output clock from 65 - 100 MHz for (i=0; i < 256; i++) ; // Wait at least 5us PLL0CN |= 0x02; // Enable the PLL while(!(PLL0CN & 0x10)); // Wait until PLL frequency is locked CLKSEL = 0x02; // Select PLL as SYSCLK source SFRPAGE = SFRPAGE_SAVE; // Restore SFR page } //----------------------------------------------------------------------------- // EMIF_Init //----------------------------------------------------------------------------- // // Configure the External Memory Interface for both on and off-chip access. // void EMIF_Init (void) { char SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = LEGACY_PAGE; EMI0CF = 0xFB; // Split-mode (banked), non-multiplexed // on P4 - P7 EMI0TC = 0xFF; // This constant may be modified // according to SYSCLK to meet the // timing requirements for the CP2200 EMI0CN = 0x20; // Page of XRAM accessed by EMIF SFRPAGE = SFRPAGE_SAVE; // Restore SFR page } //=============== // CONDITIONAL //=============== #if(UART_ENABLED) //----------------------------------------------------------------------------- // SFRPAGE = UART1_PAGE; //----------------------------------------------------------------------------- // // Configure the UART1 using Timer1, for <baudrate> and 8-N-1. // void UART1_Init (void) { char SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = UART1_PAGE; EIP2 |= 0x40; // Make UART high priority SCON1 = 0x10; // SCON1: mode 0, 8-bit UART, enable RX SFRPAGE = TIMER01_PAGE; TMOD &= ~0xF0; TMOD |= 0x20; // TMOD: timer 1, mode 2, 8-bit reload if (SYSCLK/BAUDRATE/2/256 < 1) { TH1 = -(SYSCLK/BAUDRATE/2); CKCON |= 0x10; // T1M = 1; SCA1:0 = xx } else if (SYSCLK/BAUDRATE/2/256 < 4) { TH1 = -(SYSCLK/BAUDRATE/2/4); CKCON &= ~0x13; // Clear all T1 related bits CKCON |= 0x01; // T1M = 0; SCA1:0 = 01 } else if (SYSCLK/BAUDRATE/2/256 < 12) { TH1 = -(SYSCLK/BAUDRATE/2/12); CKCON &= ~0x13; // T1M = 0; SCA1:0 = 00 } else { // Adjust for truncation in special case // Note: Additional cases may be required if the system clock is changed. #if ((BAUDRATE == 115200) && (SYSCLK == 98000000)) TH1 = -((SYSCLK/BAUDRATE/2/48)+1); #else TH1 = -(SYSCLK/BAUDRATE/2/48); #endif CKCON &= ~0x13; // Clear all T1 related bits CKCON |= 0x02; // T1M = 0; SCA1:0 = 10 } EIE2 = 0x40; // Enable UART1 interrupts TL1 = TH1; // initialize Timer1 TR1 = 1; // start Timer1 SFRPAGE = UART1_PAGE; TI1 = 1; // Indicate TX1 ready vBufferClear(); SFRPAGE = SFRPAGE_SAVE; // Restore SFR page } //----------------------------------------------------------------------------- // _getkey// A partir d'ic partie du code rediger par moi//----------------------------------------------------------------------------- // // SFR Paged version of _getkey // #define MAX_CHAR 64; char xdata UartRxBuffer [64]; unsigned int iPtrWr = 0; unsigned int iPtrRd = 0; unsigned char UART_Buffer_Size = 0; unsigned char UART_Input_First = 0; unsigned char UART_Output_First = 0; unsigned char TX_Ready =1; static char Byte; //--------------------Interrupt managing--------------------------------------------- void UART1_Parse(void) //interrupt 20 { char SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page char c = 0; SFRPAGE = UART1_PAGE; if(RI1) { if (iPtrWr != iPtrRd) { c = SBUF1; UartRxBuffer[iPtrWr++] = c; if (iPtrWr > 64) { iPtrWr = MAX_CHAR; } RI1 = 0; } else if ( (iPtrWr == iPtrRd) && (iPtrWr ==0) ) { c = SBUF1; UartRxBuffer[iPtrWr++] = c; if (iPtrWr > 64) { iPtrWr = MAX_CHAR; } RI1 = 0; } } return ; } //---------------------------------------------------------------------------------------------- // initialisation de mon buffer void vBufferClear (void) { memset(&UartRxBuffer[0],sizeof(UartRxBuffer), 0 ); iPtrWr = 0; iPtrRd = 0; } //---------------Gestion read---------------------------------------------- unsigned int uiGetHex(int iLun) { char c; unsigned int value = 0; do{ c = UartRxBuffer[iPtrRd++]; if(c>='0' && c<='9') value *= 16, value += c - '0'; else if(c>='A' && c<='F') value *= 16, value += c - 'A' + 10; else { value = 0xFFFF; return value; } --iLun; } while( iLun >= 0); return value; } //---------------------------------------------------------------------------------------------------- void SkipRaw(void) { while(UartRxBuffer[iPtrRd] <= '0' && iPtrRd<sizeof(UartRxBuffer)) iPtrRd++; } extern MACADDRESS xdata DESTMAC; //---------------------------------------------------------------------------------- void CommandParse(void) { unsigned int Addr; unsigned int Value; char c; UART1_Parse(); if(c) putchar(c); if(c!=0x0d) return; // tout ce passe bien jusqu'a ce niveau mais il rentre pas dans le switch iPtrRd = 0; switch(UartRxBuffer[0]) { case 'W': iPtrRd++; SkipRaw(); Addr = uiGetHex(4); SkipRaw(); Value = uiGetHex(2); MAC_Write(Addr, Value); printf("\nOK\n"); vBufferClear(); break; case 'R': iPtrRd++; SkipRaw(); Addr = uiGetHex(4); Value = MAC_Read(Addr); printf("\n%04x = %04x\n", Addr, Value); vBufferClear(); break; case 'T': { iPtrRd++; SkipRaw(); CP220x_Send(&DESTMAC, UartRxBuffer, sizeof(UartRxBuffer) - iPtrRd, IP_PACKET); printf("\nOK\n"); } vBufferClear(); break; default : printf("\nERROR\n"); break; } iPtrRd = 0; } /* char _getkey () { char SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page char c; SFRPAGE = UART1_PAGE; while (!RI1); c = SBUF1; RI1 = 0; SFRPAGE = SFRPAGE_SAVE; return ; } */ //----------------------------------------------------------------------------- // putchar //----------------------------------------------------------------------------- // // SFR Paged version of putchar char putchar (char c) { char SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = UART1_PAGE; // output CR if (c == '\n') { while (!TI1); TI1 = 0; SBUF1 = 0x0d; } // output character while (!TI1); TI1 = 0; SBUF1 = c; SFRPAGE = SFRPAGE_SAVE; return (c); } #endif // UART_ENABLED #endif // MCU == F120 //----------------------------------------------------------------------------- // End Of File //------------

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Je suis disposer à fournir plus d'infos par mail si jamais.
Merci pour vos conseils

Code:

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void CommandParse(void) { ... char c; UART1_Parse(); if(c) putchar(c); if(c!=0x0d) return; ....

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Ici, c n'est pas initialisé et contient n'importe quoi. Il y a de très fortes chances qu'on sorte sur le return