AVR ISP adapter (avr109/910 compatible, using ATmega16)
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#ifndef TWI_MASTER_H_
#define TWI_MASTER_H_
#include <stdint.h>
/* *********************************************************************** */
/* SLA+R */
#define CMD_WAIT 0x00
#define CMD_READ_VERSION 0x01
#define CMD_READ_MEMORY 0x02
/* SLA+W */
#define CMD_SWITCH_APPLICATION CMD_READ_VERSION
#define CMD_WRITE_MEMORY CMD_READ_MEMORY
/* CMD_SWITCH_APPLICATION parameter */
#define BOOTTYPE_BOOTLOADER 0x00
#define BOOTTYPE_APPLICATION 0x80
/* CMD_{READ|WRITE}_* parameter */
#define MEMTYPE_CHIPINFO 0x00
#define MEMTYPE_FLASH 0x01
#define MEMTYPE_EEPROM 0x02
#define TWI_SUCCESS 0x00
#define TWI_ERROR 0x01
#define TWI_NACK_ADDR 0x02
#define TWI_NACK_DATA 0x03
typedef struct twi_chipinfo_s
{
uint8_t sig[3];
uint8_t page_size;
uint16_t flash_size;
uint16_t eeprom_size;
} twi_chipinfo_t;
/* *********************************************************************** */
uint8_t twi_generic (uint8_t twi_addr,
const uint8_t * p_wr_data, uint16_t write_size,
uint8_t * p_rd_data, uint16_t read_size);
uint8_t twi_switch_application (uint8_t addr, uint8_t app);
uint8_t twi_read_version (uint8_t addr, char * p_version,
uint8_t version_length);
uint8_t twi_read_chipinfo (uint8_t addr, twi_chipinfo_t * p_chipinfo);
uint8_t twi_read_memory (uint8_t twi_addr, uint8_t memory_type,
uint16_t memory_addr,
uint8_t * p_data, uint16_t data_length);
uint8_t twi_write_memory (uint8_t twi_addr, uint8_t memory_type,
uint16_t memory_addr,
const uint8_t * p_data, uint16_t data_length);
void twi_init (uint8_t enable);
/* *********************************************************************** */
#endif /* TWI_MASTER_H_ */