mirror of https://github.com/jeelabs/esp-link.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
89 lines
3.2 KiB
89 lines
3.2 KiB
// Copyright 2015 by Thorsten von Eicken, see LICENSE.txt
|
|
/* Configuration stored in flash */
|
|
|
|
#include <esp8266.h>
|
|
#include <osapi.h>
|
|
#include "config.h"
|
|
#include "espfs.h"
|
|
|
|
FlashConfig flashConfig;
|
|
FlashConfig flashDefault = {
|
|
33, 0,
|
|
MCU_RESET_PIN, MCU_ISP_PIN, LED_CONN_PIN, LED_SERIAL_PIN,
|
|
115200,
|
|
"esp-link\0 ",
|
|
};
|
|
|
|
#define FLASH_ADDR (0x3E000)
|
|
#define FLASH_SECT (4096)
|
|
static int flash_pri; // primary flash sector (0 or 1, or -1 for error)
|
|
|
|
bool ICACHE_FLASH_ATTR configSave(void) {
|
|
FlashConfig fc;
|
|
memcpy(&fc, &flashConfig, sizeof(FlashConfig));
|
|
uint32_t seq = fc.seq+1;
|
|
// erase secondary
|
|
uint32_t addr = FLASH_ADDR + (1-flash_pri)*FLASH_SECT;
|
|
if (spi_flash_erase_sector(addr>>12) != SPI_FLASH_RESULT_OK)
|
|
return false; // no harm done, give up
|
|
// write primary with incorrect seq
|
|
fc.seq = 0xffffffff;
|
|
fc.crc = 0x55aa55aa;
|
|
if (spi_flash_write(addr, (void *)&fc, sizeof(FlashConfig)) != SPI_FLASH_RESULT_OK)
|
|
return false; // no harm done, give up
|
|
// fill in correct seq
|
|
fc.seq = seq;
|
|
if (spi_flash_write(addr, (void *)&fc, sizeof(uint32_t)) != SPI_FLASH_RESULT_OK)
|
|
return false; // most likely failed, but no harm if successful
|
|
// now that we have safely written the new version, erase old primary
|
|
addr = FLASH_ADDR + flash_pri*FLASH_SECT;
|
|
flash_pri = 1-flash_pri;
|
|
if (spi_flash_erase_sector(addr>>12) != SPI_FLASH_RESULT_OK)
|
|
return true; // no back-up but we're OK
|
|
// write secondary
|
|
fc.seq = 0xffffffff;
|
|
if (spi_flash_write(addr, (void *)&fc, sizeof(FlashConfig)) != SPI_FLASH_RESULT_OK)
|
|
return true; // no back-up but we're OK
|
|
fc.seq = seq;
|
|
spi_flash_write(addr, (void *)&fc, sizeof(uint32_t));
|
|
return true;
|
|
}
|
|
|
|
void ICACHE_FLASH_ATTR configWipe(void) {
|
|
spi_flash_erase_sector(FLASH_ADDR>>12);
|
|
spi_flash_erase_sector((FLASH_ADDR+FLASH_SECT)>>12);
|
|
}
|
|
|
|
static uint32_t ICACHE_FLASH_ATTR selectPrimary(FlashConfig *fc0, FlashConfig *fc1);
|
|
|
|
bool ICACHE_FLASH_ATTR configRestore(void) {
|
|
FlashConfig fc0, fc1;
|
|
// read both flash sectors
|
|
if (spi_flash_read(FLASH_ADDR, (void *)&fc0, sizeof(FlashConfig)) != SPI_FLASH_RESULT_OK)
|
|
memset(&fc0, sizeof(FlashConfig), 0); // clear in case of error
|
|
if (spi_flash_read(FLASH_ADDR+FLASH_SECT, (void *)&fc1, sizeof(FlashConfig)) != SPI_FLASH_RESULT_OK)
|
|
memset(&fc1, sizeof(FlashConfig), 0); // clear in case of error
|
|
// figure out which one is good
|
|
flash_pri = selectPrimary(&fc0, &fc1);
|
|
// if neither is OK, we revert to defaults
|
|
if (flash_pri < 0) {
|
|
memcpy(&flashConfig, &flashDefault, sizeof(FlashConfig));
|
|
flash_pri = 0;
|
|
return false;
|
|
}
|
|
// copy good one into global var and return
|
|
memcpy(&flashConfig, flash_pri == 0 ? &fc0 : &fc1, sizeof(FlashConfig));
|
|
return true;
|
|
}
|
|
|
|
static uint32_t ICACHE_FLASH_ATTR selectPrimary(FlashConfig *fc0, FlashConfig *fc1) {
|
|
bool fc0_crc_ok = fc0->crc == 0x55aa55aa && fc0->seq != 0xffffffff; // need real crc checksum...
|
|
bool fc1_crc_ok = fc1->crc == 0x55aa55aa && fc1->seq != 0xffffffff; // need real crc checksum...
|
|
if (fc0_crc_ok)
|
|
if (!fc1_crc_ok || fc0->seq >= fc1->seq)
|
|
return 0; // use first sector as primary
|
|
else
|
|
return 1; // second sector is newer
|
|
else
|
|
return fc1_crc_ok ? 1 : -1;
|
|
}
|
|
|