1 files changed, 89 insertions, 0 deletions
diff --git a/src/backup b/src/backup
new file mode 100644
index 0000000..a90b206
--- /dev/null
+++ b/src/backup
@@ -0,0 +1,89 @@
+#include <avr/io.h>
+#include <stdio.h>
+#include <string.h>
+#include <util/delay.h>
+#include "i2c.h"
+#include "br24t_eeprom_driver.h"
+#include "uart.h"
+#include "pins.h"
+#include "debug.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
+
+
+#ifdef FLASH_EEPROM
+int main() {
+  LED_DEBUG_DDR |= _BV(LED_DEBUG); //TODO move to debug file or somethin
+  LED_DEBUG_PORT &= ~(_BV(LED_DEBUG));
+  i2c_init();
+
+  uart_debug_init();
+  FILE stdout_replacement = FDEV_SETUP_STREAM((void *)uart_debug_sendbyte, NULL, _FDEV_SETUP_WRITE);
+  FILE stdin_replacement = FDEV_SETUP_STREAM(NULL, (void *)uart_debug_recvbyte, _FDEV_SETUP_READ);
+  stdout = &stdout_replacement;
+  stdin = &stdin_replacement;
+
+  printf("booted\r\n");
+  flash_eeprom();
+  return 0;
+
+}
+
+void flash_eeprom() {
+  unsigned int page_len;
+  unsigned int on_byte;
+  uint8_t eeprom_buffer_out[EEPROM_PAGE_SIZE]; 
+  uint8_t eeprom_buffer_in[EEPROM_PAGE_SIZE];
+ 
+  /**
+  FILE master_in = FDEV_SETUP_STREAM((void *)uart_flash_sendbyte, NULL, _FDEV_SETUP_WRITE);
+  FILE master_out = FDEV_SETUP_STREAM(NULL, (void *)uart_flash_recvbyte, _FDEV_SETUP_READ);
+  **/
+  FILE master_f = FDEV_SETUP_STREAM((void *)uart_flash_sendbyte, NULL, _FDEV_SETUP_WRITE);
+
+  printf("waiting for master\r\n");
+
+  fread(&page_len, 1, 1, master_out);
+  printf("%i pages total\r\n", page_len);
+  
+  for(int page = 0; page < page_len; page++) {
+    printf("writing page %i...\r\n", page);
+
+
+    fread(eeprom_buffer_out, EEPROM_PAGE_SIZE, 1, &master_in);
+    fputc(PAGE_WRITE_CORRUPTED, &master_out);
+
+
+    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, &master_out);
+      printf("invalid checksum on page %i!", page);
+    }
+    fputc(PAGE_WRITE_OK, &master_out);
+  }
+  printf("If you ever read this, you should be happy\r\n");
+}
+#endif