/*
- USBasp - USB in-circuit programmer for Atmel AVR controllers
-
- Thomas Fischl <tfischl@gmx.de>
-
- License........: GNU GPL v2 (see Readme.txt)
- Target.........: ATMega8 at 12 MHz
- Creation Date..: 2005-02-20
- Last change....: 2007-07-23
-
- PC2 SCK speed option. GND -> slow (8khz SCK),
- open -> fast (375kHz SCK)
-*/
+ * USBasp - USB in-circuit programmer for Atmel AVR controllers
+ *
+ * Thomas Fischl <tfischl@gmx.de>
+ *
+ * License........: GNU GPL v2 (see Readme.txt)
+ * Target.........: ATMega8 at 12 MHz
+ * Creation Date..: 2005-02-20
+ * Last change....: 2009-02-28
+ *
+ * PC2 SCK speed option.
+ * GND -> slow (8khz SCK),
+ * open -> software set speed (default is 375kHz SCK)
+ */
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
#include <avr/wdt.h>
+#include "usbasp.h"
#include "usbdrv.h"
#include "isp.h"
#include "clock.h"
-#define USBASP_FUNC_CONNECT 1
-#define USBASP_FUNC_DISCONNECT 2
-#define USBASP_FUNC_TRANSMIT 3
-#define USBASP_FUNC_READFLASH 4
-#define USBASP_FUNC_ENABLEPROG 5
-#define USBASP_FUNC_WRITEFLASH 6
-#define USBASP_FUNC_READEEPROM 7
-#define USBASP_FUNC_WRITEEEPROM 8
-#define USBASP_FUNC_SETLONGADDRESS 9
-
-#define PROG_STATE_IDLE 0
-#define PROG_STATE_WRITEFLASH 1
-#define PROG_STATE_READFLASH 2
-#define PROG_STATE_READEEPROM 3
-#define PROG_STATE_WRITEEEPROM 4
-
-#define PROG_BLOCKFLAG_FIRST 1
-#define PROG_BLOCKFLAG_LAST 2
-
-#define ledRedOn() PORTC &= ~(1 << PC1)
-#define ledRedOff() PORTC |= (1 << PC1)
-#define ledGreenOn() PORTC &= ~(1 << PC0)
-#define ledGreenOff() PORTC |= (1 << PC0)
-
static uchar replyBuffer[8];
static uchar prog_state = PROG_STATE_IDLE;
+static uchar prog_sck = USBASP_ISP_SCK_AUTO;
static uchar prog_address_newmode = 0;
static unsigned long prog_address;
static uchar prog_blockflags;
static uchar prog_pagecounter;
-
uchar usbFunctionSetup(uchar data[8]) {
- uchar len = 0;
-
- if(data[1] == USBASP_FUNC_CONNECT){
+ uchar len = 0;
- /* set SCK speed */
- if ((PINC & (1 << PC2)) == 0) {
- ispSetSCKOption(ISP_SCK_SLOW);
- } else {
- ispSetSCKOption(ISP_SCK_FAST);
- }
+ if (data[1] == USBASP_FUNC_CONNECT) {
- /* set compatibility mode of address delivering */
- prog_address_newmode = 0;
+ /* set SCK speed */
+ if ((PINC & (1 << PC2)) == 0) {
+ ispSetSCKOption(USBASP_ISP_SCK_8);
+ } else {
+ ispSetSCKOption(prog_sck);
+ }
- ledRedOn();
- ispConnect();
+ /* set compatibility mode of address delivering */
+ prog_address_newmode = 0;
- } else if (data[1] == USBASP_FUNC_DISCONNECT) {
- ispDisconnect();
- ledRedOff();
+ ledRedOn();
+ ispConnect();
- } else if (data[1] == USBASP_FUNC_TRANSMIT) {
- replyBuffer[0] = ispTransmit(data[2]);
- replyBuffer[1] = ispTransmit(data[3]);
- replyBuffer[2] = ispTransmit(data[4]);
- replyBuffer[3] = ispTransmit(data[5]);
- len = 4;
+ } else if (data[1] == USBASP_FUNC_DISCONNECT) {
+ ispDisconnect();
+ ledRedOff();
- } else if (data[1] == USBASP_FUNC_READFLASH) {
+ } else if (data[1] == USBASP_FUNC_TRANSMIT) {
+ replyBuffer[0] = ispTransmit(data[2]);
+ replyBuffer[1] = ispTransmit(data[3]);
+ replyBuffer[2] = ispTransmit(data[4]);
+ replyBuffer[3] = ispTransmit(data[5]);
+ len = 4;
- if (!prog_address_newmode)
- prog_address = (data[3] << 8) | data[2];
+ } else if (data[1] == USBASP_FUNC_READFLASH) {
- prog_nbytes = (data[7] << 8) | data[6];
- prog_state = PROG_STATE_READFLASH;
- len = 0xff; /* multiple in */
+ if (!prog_address_newmode)
+ prog_address = (data[3] << 8) | data[2];
- } else if (data[1] == USBASP_FUNC_READEEPROM) {
+ prog_nbytes = (data[7] << 8) | data[6];
+ prog_state = PROG_STATE_READFLASH;
+ len = 0xff; /* multiple in */
- if (!prog_address_newmode)
- prog_address = (data[3] << 8) | data[2];
+ } else if (data[1] == USBASP_FUNC_READEEPROM) {
- prog_nbytes = (data[7] << 8) | data[6];
- prog_state = PROG_STATE_READEEPROM;
- len = 0xff; /* multiple in */
+ if (!prog_address_newmode)
+ prog_address = (data[3] << 8) | data[2];
- } else if (data[1] == USBASP_FUNC_ENABLEPROG) {
- replyBuffer[0] = ispEnterProgrammingMode();;
- len = 1;
+ prog_nbytes = (data[7] << 8) | data[6];
+ prog_state = PROG_STATE_READEEPROM;
+ len = 0xff; /* multiple in */
- } else if (data[1] == USBASP_FUNC_WRITEFLASH) {
+ } else if (data[1] == USBASP_FUNC_ENABLEPROG) {
+ replyBuffer[0] = ispEnterProgrammingMode();
+ len = 1;
- if (!prog_address_newmode)
- prog_address = (data[3] << 8) | data[2];
+ } else if (data[1] == USBASP_FUNC_WRITEFLASH) {
- prog_pagesize = data[4];
- prog_blockflags = data[5] & 0x0F;
- prog_pagesize += (((unsigned int)data[5] & 0xF0)<<4);
- if (prog_blockflags & PROG_BLOCKFLAG_FIRST) {
- prog_pagecounter = prog_pagesize;
- }
- prog_nbytes = (data[7] << 8) | data[6];
- prog_state = PROG_STATE_WRITEFLASH;
- len = 0xff; /* multiple out */
+ if (!prog_address_newmode)
+ prog_address = (data[3] << 8) | data[2];
- } else if (data[1] == USBASP_FUNC_WRITEEEPROM) {
+ prog_pagesize = data[4];
+ prog_blockflags = data[5] & 0x0F;
+ prog_pagesize += (((unsigned int) data[5] & 0xF0) << 4);
+ if (prog_blockflags & PROG_BLOCKFLAG_FIRST) {
+ prog_pagecounter = prog_pagesize;
+ }
+ prog_nbytes = (data[7] << 8) | data[6];
+ prog_state = PROG_STATE_WRITEFLASH;
+ len = 0xff; /* multiple out */
- if (!prog_address_newmode)
- prog_address = (data[3] << 8) | data[2];
+ } else if (data[1] == USBASP_FUNC_WRITEEEPROM) {
- prog_pagesize = 0;
- prog_blockflags = 0;
- prog_nbytes = (data[7] << 8) | data[6];
- prog_state = PROG_STATE_WRITEEEPROM;
- len = 0xff; /* multiple out */
+ if (!prog_address_newmode)
+ prog_address = (data[3] << 8) | data[2];
- } else if(data[1] == USBASP_FUNC_SETLONGADDRESS) {
+ prog_pagesize = 0;
+ prog_blockflags = 0;
+ prog_nbytes = (data[7] << 8) | data[6];
+ prog_state = PROG_STATE_WRITEEEPROM;
+ len = 0xff; /* multiple out */
- /* set new mode of address delivering (ignore address delivered in commands) */
- prog_address_newmode = 1;
- /* set new address */
- prog_address = *((unsigned long*)&data[2]);
- }
+ } else if (data[1] == USBASP_FUNC_SETLONGADDRESS) {
- usbMsgPtr = replyBuffer;
+ /* set new mode of address delivering (ignore address delivered in commands) */
+ prog_address_newmode = 1;
+ /* set new address */
+ prog_address = *((unsigned long*) &data[2]);
- return len;
-}
+ } else if (data[1] == USBASP_FUNC_SETISPSCK) {
+ /* set sck option */
+ prog_sck = data[2];
+ replyBuffer[0] = 0;
+ len = 1;
+ }
-uchar usbFunctionRead(uchar *data, uchar len) {
+ usbMsgPtr = replyBuffer;
- uchar i;
-
- /* check if programmer is in correct read state */
- if ((prog_state != PROG_STATE_READFLASH) &&
- (prog_state != PROG_STATE_READEEPROM)) {
- return 0xff;
- }
-
- /* fill packet */
- for (i = 0; i < len; i++) {
- if (prog_state == PROG_STATE_READFLASH) {
- data[i] = ispReadFlash(prog_address);
- } else {
- data[i] = ispReadEEPROM(prog_address);
- }
- prog_address++;
- }
-
- /* last packet? */
- if (len < 8) {
- prog_state = PROG_STATE_IDLE;
- }
-
- return len;
+ return len;
}
+uchar usbFunctionRead(uchar *data, uchar len) {
-uchar usbFunctionWrite(uchar *data, uchar len) {
+ uchar i;
- uchar retVal = 0;
- uchar i;
+ /* check if programmer is in correct read state */
+ if ((prog_state != PROG_STATE_READFLASH) && (prog_state
+ != PROG_STATE_READEEPROM)) {
+ return 0xff;
+ }
- /* check if programmer is in correct write state */
- if ((prog_state != PROG_STATE_WRITEFLASH) &&
- (prog_state != PROG_STATE_WRITEEEPROM)) {
- return 0xff;
- }
+ /* fill packet */
+ for (i = 0; i < len; i++) {
+ if (prog_state == PROG_STATE_READFLASH) {
+ data[i] = ispReadFlash(prog_address);
+ } else {
+ data[i] = ispReadEEPROM(prog_address);
+ }
+ prog_address++;
+ }
+
+ /* last packet? */
+ if (len < 8) {
+ prog_state = PROG_STATE_IDLE;
+ }
+ return len;
+}
- for (i = 0; i < len; i++) {
+uchar usbFunctionWrite(uchar *data, uchar len) {
- if (prog_state == PROG_STATE_WRITEFLASH) {
- /* Flash */
+ uchar retVal = 0;
+ uchar i;
- if (prog_pagesize == 0) {
- /* not paged */
- ispWriteFlash(prog_address, data[i], 1);
- } else {
- /* paged */
- ispWriteFlash(prog_address, data[i], 0);
- prog_pagecounter --;
- if (prog_pagecounter == 0) {
- ispFlushPage(prog_address, data[i]);
- prog_pagecounter = prog_pagesize;
+ /* check if programmer is in correct write state */
+ if ((prog_state != PROG_STATE_WRITEFLASH) && (prog_state
+ != PROG_STATE_WRITEEEPROM)) {
+ return 0xff;
}
- }
- } else {
- /* EEPROM */
- ispWriteEEPROM(prog_address, data[i]);
- }
+ for (i = 0; i < len; i++) {
- prog_nbytes --;
+ if (prog_state == PROG_STATE_WRITEFLASH) {
+ /* Flash */
- if (prog_nbytes == 0) {
- prog_state = PROG_STATE_IDLE;
- if ((prog_blockflags & PROG_BLOCKFLAG_LAST) &&
- (prog_pagecounter != prog_pagesize)) {
+ if (prog_pagesize == 0) {
+ /* not paged */
+ ispWriteFlash(prog_address, data[i], 1);
+ } else {
+ /* paged */
+ ispWriteFlash(prog_address, data[i], 0);
+ prog_pagecounter--;
+ if (prog_pagecounter == 0) {
+ ispFlushPage(prog_address, data[i]);
+ prog_pagecounter = prog_pagesize;
+ }
+ }
- /* last block and page flush pending, so flush it now */
- ispFlushPage(prog_address, data[i]);
- }
+ } else {
+ /* EEPROM */
+ ispWriteEEPROM(prog_address, data[i]);
+ }
- retVal = 1; // Need to return 1 when no more data is to be received
- }
+ prog_nbytes--;
- prog_address ++;
- }
+ if (prog_nbytes == 0) {
+ prog_state = PROG_STATE_IDLE;
+ if ((prog_blockflags & PROG_BLOCKFLAG_LAST) && (prog_pagecounter
+ != prog_pagesize)) {
- return retVal;
-}
+ /* last block and page flush pending, so flush it now */
+ ispFlushPage(prog_address, data[i]);
+ }
+ retVal = 1; // Need to return 1 when no more data is to be received
+ }
-int main(void)
-{
- uchar i, j;
-
- PORTD = 0;
- PORTB = 0; /* no pullups on USB and ISP pins */
- DDRD = ~(1 << 2); /* all outputs except PD2 = INT0 */
+ prog_address++;
+ }
- DDRB = ~0; /* output SE0 for USB reset */
- j = 0;
- while(--j){ /* USB Reset by device only required on Watchdog Reset */
- i = 0;
- while(--i); /* delay >10ms for USB reset */
- }
- DDRB = 0; /* all USB and ISP pins inputs */
+ return retVal;
+}
- DDRC = 0x03; /* all inputs except PC0, PC1 */
- PORTC = 0xfe;
+int main(void) {
+ uchar i, j;
+
+ /* no pullups on USB and ISP pins */
+ PORTD = 0;
+ PORTB = 0;
+ /* all outputs except PD2 = INT0 */
+ DDRD = ~(1 << 2);
+
+ /* output SE0 for USB reset */
+ DDRB = ~0;
+ j = 0;
+ /* USB Reset by device only required on Watchdog Reset */
+ while (--j) {
+ i = 0;
+ /* delay >10ms for USB reset */
+ while (--i)
+ ;
+ }
+ /* all USB and ISP pins inputs */
+ DDRB = 0;
- clockInit(); /* init timer */
+ /* all inputs except PC0, PC1 */
+ DDRC = 0x03;
+ PORTC = 0xfe;
- ispSetSCKOption(ISP_SCK_FAST);
+ /* init timer */
+ clockInit();
- usbInit();
- sei();
- for(;;){ /* main event loop */
- usbPoll();
- }
- return 0;
+ /* main event loop */
+ usbInit();
+ sei();
+ for (;;) {
+ usbPoll();
+ }
+ return 0;
}
projects / pub / USBasp.git / blobdiff