Колеги, 3 дена се боря както опълченците на Шипка с MSSP модула на PIC16FXX професорите ( вече роня крокодилски сълзи
) Искам да чета/пиша буфер от 32 или 64 байта в 24LC515, обаче не ще и не ще пущината ... Пробвам с драйверите на CCS, обаче те работят коректно само ако пиша/чета по един байт, като ги пусна на буфер правят каквото си искат. Имам едни мои драйвери, които съм си писал преди 2-3 години и са работили коректно досега с друг MSSP модул и с I2C модула на I80552, както и с Neuron професор:
 | | |
| Код: #define I2C_SLAVE 0xA0 //#define I2C_SPEED ( ( CRYSTAL / ( 4 * 50000 ) ) - 1 ) // pull-up = 10k #define I2C_SPEED ( ( CRYSTAL / ( 4 * 100000 ) ) - 1 ) // pull-up = 10k //#define I2C_SPEED ( ( CRYSTAL / ( 4 * 400000 ) ) - 1 ) // pull-up = 2k //#define I2C_SPEED ( ( CRYSTAL / ( 4 * 1000000 ) ) - 1 ) // pull-up = 2k #define I2C_PAGE_SIZE 64 #define I2C_HALF_PAGE ( I2C_PAGE_SIZE / 2 ) #define I2C_MEM_SIZE 65536 #define M24515 unsigned int16 i2caddr; #byte i2caddr_low=i2caddr #byte i2caddr_high=i2caddr+1 int8 i2cslave,i2cflags,i2cdata,i2ccount,i2ctemp; #bit i2cerr=i2cflags.0 #bit i2c_page_cross=i2cflags.1 int8 i2cpage[I2C_PAGE_SIZE]; #byte i2cpage=0xA0 // Initialize MSSP for Master I2C mode operation void I2CInitMaster(void) { i2cslave = I2C_SLAVE; SSPCON = 0; SSPIE = 0; // Disable interrupt from I2C module TRISC |= 0b00011000; // Make SCL & SDA to be inputs SMP = 1; // enable 100KHz & 1MHz ! CKE = 0; // I2C specification ! GCEN = 0; // disable interrupt when detect general call address on the i2c bus . SSPADD = I2C_SPEED; SSPCON = 0x08; // Master mode, 7-bit address, clock=(Fosc/(4*I2CClock))-1; SSPIF = 0; SSPEN = 1; // Enable I2C port } // I2CIdle() - from 00735A.PDF void I2CIdle(void) { while( R_W ); // Check for transmit in progres. If in progress wait. while( SSPCON2 & 0x1F ); } void I2CWait(void) { while( ! SSPIF ); SSPIF = 0; } void I2CWrite(char data) { SSPBUF = data; I2CWait(); // In Master Transmit Mode: Check for Acknowledge i2cerr = 0; if( ACKSTAT ) i2cerr = 1; } void I2CIsFree(void) { i2cerr = 1; if( I2C_STOP || ! I2C_START ) i2cerr = 0; } void I2CStart(void) { SEN = 1; // Initiate Start condition I2CWait(); } void I2CSStart(void) { RSEN = 1; // Second Start condition I2CWait(); I2CWrite( i2cslave | 0x01 ); // Set Read operation } void I2CStop(void) { PEN = 1; // Generate STOP condition I2CWait(); } void I2CAck(void) { // In Master receive mode: Value that will be transmitted when the user // initiates an Acknowledge sequence at the end of a receive. // ACKDT = 0; // Acknowledge // In Master receive mode: Initiate Acknowledge sequence on SDA & SCL // and transmit ACKDT data bit. Automatically cleared by hardware // ACKEN = 1; I2CWait(); } void I2CMasterAck(void) { // In Master receive mode: Value that will be transmitted when the user // initiates an Acknowledge sequence at the end of a receive. // ACKDT = 1; // Not Acknowledge // In Master receive mode: Initiate Acknowledge sequence on SDA & SCL // and transmit ACKDT data bit. Automatically cleared by hardware // ACKEN = 1; I2CWait(); } char I2CRead(void) { while( R_W ); // Wait for transmit to end ... RCEN = 1; // Enter Master mode reception I2CWait(); // Wait to receive one byte return SSPBUF; } void I2CPageCross(void) { i2c_page_cross = 0; if( ! bit_test(i2caddr,15) && bit_test( i2caddr + (int16)i2ccount, 15 ) ) i2c_page_cross = 1; } void I2CRestoreAddress(void) { i2caddr -= (i2ctemp-1); } // I2CWriteAddr() void I2CWriteAddr(void) { WCOL = 0; I2CIsFree(); // If I2C is free ? if( i2cerr ) return; // bus is busy ! I2CStart(); // Send Start signal #ifdef M24515 if( bit_test(i2caddr,15) ) i2cslave |= 0x08; else i2cslave &= ~0x08; #endif I2CWrite( i2cslave ); // Set Write operation if( i2cerr ) return; I2CWrite( i2caddr_high ); // Send high byte of address if( i2cerr ) return; I2CWrite( i2caddr_low ); // Send low byte of address } char I2CReadByte(void) { I2CWriteAddr(); // Write address in address registers if( i2cerr ) return; // bus is busy ! I2CSStart(); // Second Start ... if( i2cerr ) return; // bus is busy ! i2cdata = I2CRead(); I2CMasterAck(); // Send Not Acknowledge signal I2CStop(); // Generate Stop condition } void I2CReadSeq(void) { I2CWriteAddr(); // Write address in address registers if( i2cerr ) return; // bus is busy ! I2CSStart(); // Second Start ... if( i2cerr ) return; // bus is busy ! i2ctemp = i2ccount; #ifdef M24515 I2CPageCross(); #endif do { INDF = I2CRead(); FSR++; if( --i2ccount == 0 ) break; #ifdef M24515 if( ++i2caddr == 0x8000 ) { I2CStop(); I2CWriteAddr(); if( i2cerr ) break; I2CSStart(); if( i2cerr ) break; } else I2CAck(); #else I2CAck(); #endif } while( 1 ); I2CRestoreAddress(); I2CMasterAck(); // Send Not Acknowledge signal I2CStop(); // Generate STOP condition } void I2CWriteByte(void) { I2CWriteAddr(); // Write address in address registers if( i2cerr ) return; // bus is busy ! I2CWrite( i2cdata ); I2CStop(); // Verifiy record ... do { I2CWriteAddr(); } while( i2cerr ); I2CSStart(); // Send Start signal if( i2cerr ) return; if( i2cdata != I2CRead() ) i2cerr = 1; else I2CMasterAck(); // Send Not Acknowledge signal I2CStop(); // Generate STOP condition } void I2CWriteSeq(void) { I2CWriteAddr(); if( i2cerr ) return; i2ctemp = i2ccount; #ifdef M24515 I2CPageCross(); #endif do { I2CWrite( INDF ); if( i2cerr ) return; FSR++; if( --i2ccount == 0 ) break; #ifdef M24515 if( ++i2caddr == 0x8000 ) { I2CStop(); I2CWriteAddr(); if( i2cerr ) break; } #endif } while( 1 ); I2CStop(); I2CRestoreAddress(); // Verify record ... do { I2CWriteAddr(); } while( i2cerr ); I2CSStart(); // Send Start signal if( i2cerr ) return; FSR -= i2ctemp; i2ccount = i2ctemp; #ifdef M24515 I2CPageCross(); #endif do { if( INDF != I2CRead() ) { i2cerr = 1; break; } FSR++; if( --i2ccount == 0 ) break; #ifdef M24515 if( ++i2caddr == 0x8000 ) { I2CStop(); I2CWriteAddr(); if( i2cerr ) break; I2CSStart(); if( i2cerr ) break; } else I2CAck(); #else I2CAck(); #endif } while( 1 ); I2CRestoreAddress(); I2CMasterAck(); // Send Not Acknowledge signal I2CStop(); // Generate STOP condition } | |
| | |
Ако само пиша буфер, от време на време работи, ако само чета в буфер, също работи от време на време, ако обаче запиша буфер, след което чета буфер, зависва на проверката на SSPIF в I2CWait(); когато записвам адреса чрез I2CWriteAddr();
Някой има ли нещо пробвано и работещо за буфери с MSSP модула щото ми иде да метна щангата през прозореца ...
С драйвърите на CCS работи точно както казваш, по един байт...а от време на време даже и не работи. Накрая си го написах софтуерно 
Вместо туй чудо съм използвал 4-ри канален запомнящ осцилоскоп, върши чудесна работа.