EEPROM.zip_EEPROM_WriteBytes_PIC24F eeprom_XC16_eeprom_pic24f

#include<p24FJ256GB106.h> //#define CS PORTDbits.RD3 #define CS LATDbits.LATD3 #define HOLD VBUS #define CS_TRIS TRISDbits.TRISD3 #define READ 0x03 #define WRITE 0x02 #define WRITE_ENABLE 0x06 #define WRITE_DISABLE 0x04 #define READ_STATUS 0x05 #define WRITE_STATUS 0x01 #define CLOCK_FREQ 32000000 #define BAUD_RATE 19200 //#define CLOCK_FREQ 8000000 //#define BAUD_RATE 19200 #define nl() ConsolePutROMString((const char*)"\r\n"); #define tab() ConsolePutROMString((const char*)" "); #define PPSUnLock __builtin_write_OSCCONL(OSCCON & 0xbf) #define PPSLock __builtin_write_OSCCONL(OSCCON | 0x40) #define iPPSInput(fn,pin) fn=pin #define PPSInput(fn,pin) iPPSInput(IN_FN_##fn,IN_PIN_##pin) #define iPPSOutput(pin,fn) pin=fn #define PPSOutput(fn,pin) iPPSOutput(OUT_PIN_##pin,OUT_FN_##fn) #define OUT_FN_PPS_U2TX 5 #define OUT_PIN_PPS_RP14 RPOR7bits.RP14R #define IN_PIN_PPS_RP29 29 #define IN_FN_PPS_U2RX RPINR19bits.U2RXR #define OUT_FN_PPS_SDO3 32 #define OUT_PIN_PPS_RP4 RPOR2bits.RP4R #define OUT_FN_PPS_SCK3OUT 33 #define OUT_PIN_PPS_RP3 RPOR1bits.RP3R #define IN_PIN_PPS_RP23 23 #define IN_FN_PPS_SDI3 RPINR28bits.SDI3R void delay_ms(unsigned int); void SPI_init(void); void init_eeprom(void); unsigned char SPIPut(unsigned char); void UART_Config_PPS(void); unsigned char read_eeprom(unsigned int, unsigned char); //void write_eeprom(unsigned int, unsigned char); void spi_interrupt_init(void); void write_enable_latch(void); void ConsolePutROMString(const char* str); void ConsolePut(unsigned char c); void PrintChar(unsigned char); const unsigned char CharacterArray[]={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'}; _CONFIG1( JTAGEN_OFF & GCP_OFF & GWRP_OFF & ICS_PGx2 & FWDTEN_OFF) _CONFIG2( IESO_OFF & PLLDIV_DIV2 & FNOSC_PRIPLL & FCKSM_CSDCMD & IOL1WAY_OFF & DISUVREG_OFF & POSCMOD_XT) //32MHZ //_CONFIG2(FNOSC_PRI & IOL1WAY_OFF & POSCMOD_XT) //8MHZ unsigned char read_eeprom(unsigned int address, unsigned char data) { unsigned char read = 0; // HOLD = 1; CS = 0; read = SPIPut(READ); read = SPIPut((address & 0xFF00) >> 8); read = SPIPut(address & 0x00FF); read = SPIPut(data); CS = 1; return (read); } void write_eeprom(unsigned int address, unsigned char data) { unsigned char write; // HOLD = 1; write_enable_latch(); delay_ms(10); CS = 0; write = SPIPut(WRITE); write = SPIPut((address & 0xFF00) >> 8); write = SPIPut(address & 0x00FF); write = SPIPut(data); CS = 1; } void write_enable_latch(void) { CS = 0; SPIPut(WRITE_ENABLE); CS = 1; } void ConsolePutROMString(const char* str) { unsigned char c; while( (c = *str++) ) { ConsolePut(c); //put character by character on screen (transmit using usart) } } void ConsolePut(unsigned char c) { while(U2STAbits.TRMT == 0); //wait until previous transmission is complete or done U2TXREG = c; //write the data byte to lower byte of TXREG } void PrintChar(unsigned char toPrint) { unsigned char PRINT_VAR; PRINT_VAR = toPrint; toPrint = (toPrint>>4)&0x0F; ConsolePut(CharacterArray[toPrint]); toPrint = (PRINT_VAR)&0x0F; ConsolePut(CharacterArray[toPrint]); //????not exactly understood why this is done???? return; } void UART_Config_PPS() { PPSUnLock; PPSInput(PPS_U2RX, PPS_RP29); PPSOutput(PPS_U2TX,PPS_RP14); PPSLock; } void SPI_Config_PPS() { PPSUnLock; PPSOutput(PPS_SDO3,PPS_RP4); PPSOutput(PPS_SCK3OUT,PPS_RP3); PPSInput(PPS_SDI3,PPS_RP23); PPSLock; } void delay_ms(unsigned int cnt) { volatile unsigned int i, b; b = cnt; while(b--) { for(i = 0; i < 3200; i++); } } void spi_init() { CS_TRIS = 0;/*make chip select an output */ CS = 1; /*deselect the eeprom */ delay_ms(5); SPI_Config_PPS(); delay_ms(5); SPI3STATbits.SPIROV = 0; SPI3CON2 = 0; SPI3CON1 = (SPI3CON1 & 0xFE90) | 0x013A; // SPI3CON1bits.MSTEN = 1; // SPI3CON1bits.SMP = 1; // SPI3CON1bits.CKP = 0; // SPI3CON1bits.CKE = 1; // SPI3CON1bits.SPRE = 0x06; // SPI3CON1bits.PPRE = 0x02; SPI3STATbits.SPIEN = 1; // CS_TRIS = 0;/*make chip select an output */ // CS = 0; /*deselect the eeprom */ // SPI3CON1bits.MSTEN = 1; // SPI3STATbits.SPIROV = 0; // SPI3CON2bits.SPIBEN = 1; // SPI3STATbits.SPIEN = 1; SPI_Config_PPS(); // SPI3STATbits.SPIEN = 1; } unsigned char SPIPut(unsigned char val)//val is byte that need to be transfered { unsigned char dummy = 0; //IFS5bits.SPI3IF = 0; /* Clear the SPIxIF bit in the respective IFSx registeri */ dummy = SPI3BUF; /* read the value before writing to avoid overflow bit setting */ SPI3BUF = val; /* write in to buffer the new value */ //while(IFS5bits.SPI3IF != 1);/* WAIT FOR TRANSFER TO COMPLETE */ while(!SPI3STATbits.SPIRBF); return SPI3BUF; } #if 0 void __attribute__((__interrupt__,no_auto_psv))_SPI3Interrupt(void) { _RF5 = !_RF5; IFS5bits.SPI3IF = 0; } void spi_interrupt_init(void) { IFS5bits.SPI3IF = 0; IPC22bits.SPI3IP = 0x03; IEC5bits.SPI3IE = 1; } #endif void UART_init() { U2BRG = (CLOCK_FREQ/2/16)/BAUD_RATE-1; U2STA = 0; U2MODEbits.UARTEN = 1; //U2STAbits.UTXEN = 1; U2STAbits.UTXEN = 1; delay_ms(5); UART_Config_PPS(); } void transmit( unsigned char val) { while(!U2STAbits.TRMT); U2TXREG = val; } int main() { unsigned char eread = 0x00; unsigned int i; unsigned char j = 0x00, k = 0; AD1PCFGL = 0xffff; AD1PCFGH = 0x0003; _TRISF5 = 0; _RF5 = 0; delay_ms(5); spi_init(); delay_ms(5); UART_init(); delay_ms(5); while(1) { #if 0 for(i = 0x0000; i < 64; i++) { write_eeprom(i , j++); delay_ms(10); } #endif k = 0; for(i = 0x0000; i < 64; i++) { if(k < 32) { eread = read_eeprom(i, 0x00); delay_ms(10); PrintChar(eread); tab(); k++; if( k == 32) { k = 0; nl(); } } } nl(); j = 0; delay_ms(100); } return 0; }