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