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Rearrange the pinout for the programmer to be a little more logical.

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Provide hooks to support a buffered programmer, pin 6 is now used to
enable a buffer that can be used to isolate the target system from the
parallel port pins.  This is important when programming the target
in-system.

Totally change the way the pin definitions are defined.  Actually
set/clear pins based on the way more intuitive pin number, instead of
PPI data register, bit number combination.  A table of pin data is
used so that any hardware inversion done by the parallel port is
accounted for, what you set is actually what appears at the pin.
Retain the old method for handling Vcc, however, because the hold
method is much easier to use when setting / retrieving multiple pins
simultaneously.


git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@49 81a1dc3b-b13d-400b-aceb-764788c761c2
This commit is contained in:
Brian S. Dean
2001-01-24 18:45:58 +00:00
parent 6593c1e534
commit fc56e6b4f9
5 changed files with 218 additions and 67 deletions
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34
avr.h
View File

@@ -34,14 +34,18 @@
#include <stdio.h>
/*
* bit definitions for AVR device connections
*/
#define AVR_POWER 0xf1 /* bit 0 and 4...7 of data register */
#define AVR_CLOCK 0x02 /* bit 1 of data register */
#define AVR_INSTR 0x04 /* bit 2 of data register */
#define AVR_RESET 0x08 /* bit 3 of data register */
#define AVR_DATA 0x40 /* bit 6 of status register */
#define PPI_AVR_VCC 0x0f /* ppi pins 2-5, data reg bits 0-3 */
#define PIN_AVR_BUFF 6
#define PIN_AVR_RESET 7
#define PIN_AVR_SCK 8
#define PIN_AVR_MOSI 9
#define PIN_AVR_MISO 10
#define PIN_LED_ERR 1
#define PIN_LED_RDY 14
#define PIN_LED_PGM 16
#define PIN_LED_VFY 17
/*
@@ -61,7 +65,7 @@ struct avrmem {
AVRMEM memtype;
int startaddr;
int size;
unsigned char buf;
unsigned char * buf;
struct avrmem * next;
};
#endif
@@ -72,20 +76,14 @@ struct avrpart {
int memsize[AVR_MAXMEMTYPES]; /* sizes for eeprom,
flash, etc, indexed by
AVR_EEPROM or AVR_FLASH */
#if 0
int flash_size; /* size in bytes of flash */
int eeprom_size; /* size in bytes of eeprom */
#endif
unsigned char f_readback; /* flash write polled readback value */
unsigned char e_readback[2]; /* eeprom write polled readback values */
int min_write_delay; /* microseconds */
int max_write_delay; /* microseconds */
int chip_erase_delay; /* microseconds */
unsigned char * mem[AVR_MAXMEMTYPES];
#if 0
unsigned char * flash;
unsigned char * eeprom;
#endif
unsigned char * mem[AVR_MAXMEMTYPES]; /* pointers to avr memory
buffers, indexed by
AVR_EEPROM or AVR_FLASH */
};
extern struct avrpart parts[];