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#include <stdio.h>
#include "i2c.h"
#include "br24t_eeprom_driver.h"
#define EEPROM_ADDR 0x57
#define EEPROM_PAGE_SIZE 64
//for burning eeprom
#define MAGIC_SYN 0xdeadbeef
#define MAGIC_ACK 0xf00dd00d
#define PAGE_WRITE_OK 0x00
#define PAGE_WRITE_CORRUPTED 0x01
#define PAGE_WRITE_UNKNOWN_ERROR 0xff
//we need another function cause it's got a 16 bit register address
#ifdef FLASH_EEPROM
void flash_eeprom() {
uint16_t data_len;
uint32_t syn = 0;
uint8_t on_byte;
uint8_t eeprom_buffer_out[EEPROM_PAGE_SIZE];
uint8_t eeprom_buffer_in[EEPROM_PAGE_SIZE];
while(syn != MAGIC_SYN) fread(&syn, 4, 1, stdin); //not sure we _really_ need to do this?
//this feels ugly
syn = MAGIC_ACK;
fwrite(&syn, 4, 1, stdout);
//get amount of data we'll be using
data_len = uart_recvbyte();
data_len |= (uart_recvbyte() >> 8);
for(int page = 0; page < (data_len / EEPROM_PAGE_SIZE); data_len -= EEPROM_PAGE_SIZE) {
fread(eeprom_buffer_out, EEPROM_PAGE_SIZE, 1, stdin);
i2c_start(EEPROM_I2C_ADDR, I2C_READ);
i2c_send((uint8_t)(page * EEPROM_PAGE_SIZE) & 0xff);
i2c_send((uint8_t)(page * EEPROM_PAGE_SIZE) >> 8);
for(on_byte = 0; on_byte < EEPROM_PAGE_SIZE; on_byte++)
i2c_send(eeprom_buffer_out[on_byte]);
i2c_stop();
//verify
eeprom_buffer_in[0] = EEPROM_READBYTE(page * EEPROM_PAGE_SIZE);
//eeprom_buffer_in[0] = i2c_read_reg_addr16(EEPROM_I2C_ADDR, page * EEPROM_PAGE_SIZE);
i2c_start(EEPROM_I2C_ADDR, I2C_READ);
for(on_byte = 1; on_byte < EEPROM_PAGE_SIZE; on_byte++)
eeprom_buffer_in[on_byte] = i2c_recv();
i2c_stop();
if(memcmp(eeprom_buffer_in, eeprom_buffer_out, EEPROM_PAGE_SIZE)) {
fputc(PAGE_WRITE_CORRUPTED, stdout);
error();
}
fputc(PAGE_WRITE_OK, stdout);
}
}
#endif
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