int erase_sector_flash(unsigned int start_sector, unsigned int end_sector)
{
//reset_flash();
int i, z;
print_string("Erasing ... ");
write_flash_unlock_sequence();
write_flash_command((unsigned char) FLASH_CMD_ERASE_SETUP);
write_flash_unlock_sequence();
/* Sector erase */
for (i = start_sector; i <= end_sector; i++)
{
//print_string("Erasing sector at address: ");
//print_hex_unsigned(FLASH_BASE + SECTOR_ADDRESS(i));
//print_string("\r\n");
*((volatile unsigned short *) (FLASH_BASE + SECTOR_ADDRESS(i))) = FLASH_CMD_SECTOR_ERASE;
}
DELAY(500);
if (poll_status(FLASH_OP_ERASE, SECTOR_ADDRESS(i), 0) != 0)
{
write_flash_command((unsigned char) FLASH_CMD_RESET);
return -1;
}
print_string("ok\r\n");
return 0;
}
int erase_chip_flash()
{
int z;
reset_flash();
write_flash_unlock_sequence();
write_flash_command((unsigned char) FLASH_CMD_ERASE_SETUP);
write_flash_unlock_sequence();
write_flash_command((unsigned char) FLASH_CMD_CHIP_ERASE);
DELAY(200);
/*if (poll_status(FLASH_OP_ERASE, SECTOR_ADDRESS(0x00), 0) != 0)
{
write_flash_command((unsigned char) FLASH_CMD_RESET);
return -1;
}*/
print_string("OK\r\n");
return 0;
}
static int write_flash_byte(unsigned int address, uint8_t data)
{
write_flash_command(0x0555, 0xAA);
write_flash_command(0x02AA, 0x55);
write_flash_command(0x0555, 0xA0);
write_flash_command(address, data);
int timeout = 0;
while (read_prg_byte(address | 0x8000) != data && timeout < 10)
{
ROMSEL_HI;
PHI2_LOW;
_delay_us(100);
timeout++;
}
ROMSEL_HI;
return timeout < 10;
}
int single_word_program_flash(unsigned long address, unsigned short data)
{
write_flash_unlock_sequence();
write_flash_command((unsigned char) FLASH_CMD_PROGRAM_SETUP);
*( (volatile unsigned short *) (FLASH_BASE + ALIGN(address))) = data;
/*if (poll_status(FLASH_OP_PROGRAMMING, ALIGN(address), data) != 0)
{
write_flash_command((unsigned char) FLASH_CMD_RESET);
return -1;
}*/
int z;
DELAY(5);
if (*( (volatile unsigned short *) (FLASH_BASE + ALIGN(address))) != data)
return -1;
return 0;
}
// Do not run this method from within the Flash memory
void print_flash_info()
{
reset_flash();
write_flash_unlock_sequence();
write_flash_command((unsigned char) FLASH_CMD_AUTOSELECT);
unsigned short manuf_id = FLASH_EXTRACT(0x00);
print_string("Flash Device Information (AUTOSELECT)\r\n");
print_string("Manufacturer ID: ");
print_hex_unsigned(manuf_id);
if ((manuf_id) == 0x01)
print_string(" (Spansion)\r\n");
else
print_string(" (Unknown)\r\n");
print_string("Device ID: ");
//unsigned short dev_id_1 = FLASH_EXTRACT(0x01);
unsigned short dev_id_2 = FLASH_EXTRACT(0x0E);
//unsigned short dev_id_3 = FLASH_EXTRACT(0x0F);
switch (dev_id_2)
{
case 0x28:
print_string(" S29GL01GP - 1 Gb\r\n");
break;
case 0x23:
print_string(" S29GL512P - 512 Mb\r\n");
break;
case 0x22:
print_string(" S29GL256P - 256 Mb\r\n");
break;
case 0x21:
print_string(" S29GL128P - 128 Mb\r\n");
break;
default:
print_string(" Unknown\r\n");
break;
}
// Reset flash
reset_flash();
}
static int erase_flash()
{
LED_RED_ON;
write_flash_command(0x0555, 0xAA);
write_flash_command(0x02AA, 0x55);
write_flash_command(0x0555, 0x80);
write_flash_command(0x0555, 0xAA);
write_flash_command(0x02AA, 0x55);
write_flash_command(0x0555, 0x10);
int timeout = 0;
while ((read_prg_byte(0x8000) != 0xFF) && (timeout < 10000))
{
ROMSEL_HI;
_delay_ms(1);
timeout++;
}
ROMSEL_HI;
LED_RED_OFF;
return timeout < 10000;
}
/*
* Unlock bypass mode.
* Enter this mode before doing a sequence of similar program
* operations. After this call, programming only takes two write
* cycles.
* Once you enter Unlock Bypass Mode, do a series of like
* operations (programming or sector erase) and then exit
* Unlock Bypass Mode before beginning a different type of
* operations.
*/
void unlock_bypass_flash()
{
write_flash_unlock_sequence();
write_flash_command((unsigned char) FLASH_CMD_UNLOCK_BYPASS);
unlock_bypass = 1;
}
/* Soft reset */
void reset_flash()
{
write_flash_command((unsigned char) FLASH_CMD_RESET);
}
