SL811HS USB MASS STORAGE DRIVER FOR PIC.rar

//======================================================================================== // // USB MASS STORAGE DRIVER FOR PIC18F452 // Version: 2.01 // //======================================================================================== // Author : Guillaume Fondeville // Email : g.fondeville@free.fr // Site : http://g.fondeville.free.fr //======================================================================================== // Micro : PIC18F452 16MHz // SIE : SL811HS (Cypress) // WatchDog disable, Oscillator HS // UART : 115200, 8 data bits, no parity, 1 start, 1 stop // //--------- GNU GPL LICENCE -------------------------------------------------- // This file is subject to the terms of the GNU General Public License as // published by the Free Software Foundation. A copy of this license is // included with this software distribution in the file COPYING. If you // do not have a copy, you may obtain a copy by writing to the Free // Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. // // This software is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details //======================================================================================== #include <pic18fxx2.h> #include <pic18.h> //======================================================================================== // Functions //======================================================================================== //UART void init232(char speed); void tx232(char val); char rx232_wait(void); void tx232_puts(const char * s); void tx232_2ascii(unsigned char car); void tx232_long(unsigned long car); //USB unsigned char sl811_init(void); unsigned char sl811_usb_ready(void); unsigned char sl811_write_sector(unsigned long sector, unsigned char *buf); unsigned char sl811_read_sector(unsigned long sector, unsigned char *buf); void display_sector(unsigned char * buf); void sl811_write_next(unsigned char value); unsigned char sl811_read_next(void); void pause_ms(unsigned char tps); //======================================================================================== // Global Variables //======================================================================================== unsigned char buffer[512]; unsigned char data_toggle, adr, endp_in, endp_out; //======================================================================================== // Constant definitions //======================================================================================== #define INTRQ RB0 #define NRST RB1 #define LED_G RB2 #define LED_R RB3 #define BP_R RB4 #define BP_N RB5 #define NWR RC0 #define NCS RC1 #define NRD RC2 #define A0 RC3 #define SL811_DATA PORTD #define READY 0 #define COMPLETED 0 #define NO_DEVICE 1 #define NOT_FULL_SPEED 2 #define NOT_MASS_STORAGE 3 #define ERROR 4 #define BUSY 5 #define STALL 6 //Macros #define p_data_out(); {TRISD = 0x00;}; #define p_data_in(); {TRISD = 0xFF;}; #define USB_DEBUGMODE //======================================================================================== // Interruption //======================================================================================== static void interrupt isr(void) {;} //======================================================================================== // Programme main //======================================================================================== void main (void) { unsigned char tmp; unsigned long sector; // port configuration TRISA = 0b11111111; TRISB = 0b11110001; TRISC = 0b11110000; TRISD = 0b11111111; TRISE = 0b00000111; ADCON1 = 7; //enable digital I/O //port initialisation PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; pause_ms(255); init232(8); //Init UART 115200 8 for an oscillator 16 MHz LED_G = 1; tx232_puts("\n\n\rStart program\n\r"); sl811_init(); //SIE init & wait device attachment LED_R = 1; tx232_puts("\n\rPlease BP_G to read a sector\n\r"); while(BP_N == 1); //read sector sector = 0x00000000; sl811_read_sector(sector, buffer); //display sector tx232_puts("\r\nSector 0x"); tx232_long(sector); display_sector(buffer); tx232_puts("\n\rPlease BP_O to write modified sector\n\r"); while(BP_R == 1); //Modify sector buffer[0x1FC] = buffer[0x1FC] + 1; //increment byte 508 of the sector //Write sector sl811_write_sector(sector, buffer); //Check sector sl811_read_sector(sector, buffer); //Display sector tx232_puts("\r\nSector 0x"); tx232_long(sector); display_sector(buffer); while(1); //end of program, reset PIC to restart } //************************************************************ // SL811 FUNCTIONS //************************************************************ /****************************************************************************************/ //Write one byte in sl811 register /****************************************************************************************/ void sl811_write(unsigned char adr, unsigned char value) { p_data_out(); NCS = 0; A0 = 0; SL811_DATA = adr; NWR = 0; asm("nop"); NWR = 1; A0 = 1; SL811_DATA = value; NWR = 0; asm("nop"); NWR = 1; NCS = 1; p_data_in(); } /****************************************************************************************/ // Read one byte in sl811 register /****************************************************************************************/ unsigned char sl811_read(unsigned char adr) { unsigned char value; p_data_out(); NCS = 0; A0 = 0; SL811_DATA = adr; NWR = 0; asm("nop"); NWR = 1; A0 = 1; p_data_in(); NRD = 0; asm("nop"); value = SL811_DATA; NRD = 1; NCS = 1; p_data_in(); return value; } /****************************************************************************************/ //Write buffer /****************************************************************************************/ void sl811_write_buf(unsigned char adr, unsigned char * buffer, unsigned char size) { unsigned char i; sl811_write(adr, buffer[0]); size--; i = 1; while(size != 0) { sl811_write_next(buffer[i]); i++; size--; } } /****************************************************************************************/ //Read buffer /****************************************************************************************/ void sl811_read_buf(unsigned char adr, unsigned char * buffer, unsigned char size) { unsigned char i; buffer[0] = sl811_read(adr); size --; i = 1; while(size != 0) { buffer[i] = sl811_read_next(); i++; size--; } } /****************************************************************************************/ //Write without specify address /****************************************************************************************/ void sl811_write_next(unsigned char value) { A0 = 1; NCS = 0; p_data_out(); SL811_DATA = value; NWR = 0; asm("nop"); NWR = 1; NCS = 1; p_data_in(); } /****************************************************************************************/ //Read without specify addre