blob: edd73e4435d6c0ba916c061ad070de5c9daee903 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <peripheral_clk_config.h>
#include "watch.h"
void app_init(void) {
}
void app_wake_from_backup(void) {
}
void app_setup(void) {
delay_ms(5000);
while (!(NVMCTRL->INTFLAG.reg & NVMCTRL_INTFLAG_READY));
uint32_t user_row = (*((uint32_t *)NVMCTRL_AUX0_ADDRESS));
uint8_t eeprom = (user_row >> NVMCTRL_FUSES_EEPROM_SIZE_Pos) & 7;
printf("User row read successfully: 0x%lx\n", user_row);
if (eeprom != 1) {
user_row &= ~NVMCTRL_FUSES_EEPROM_SIZE_Msk;
user_row |= NVMCTRL_FUSES_EEPROM_SIZE(1);
if (NVMCTRL->STATUS.reg & NVMCTRL_STATUS_SB) {
printf("Secured bit was set; cannot perform upgrade.\n");
return;
}
printf("EEPROM configuration was %d.\nApplying change...\n", eeprom);
uint32_t temp = NVMCTRL->CTRLB.reg; // Backup settings
NVMCTRL->CTRLB.reg = temp | NVMCTRL_CTRLB_CACHEDIS; // Disable Cache
NVMCTRL->STATUS.reg |= NVMCTRL_STATUS_MASK; // Clear error flags
NVMCTRL->ADDR.reg = NVMCTRL_AUX0_ADDRESS / 2; // Set address, command will be issued elsewhere
NVMCTRL->CTRLA.reg = NVMCTRL_CTRLA_CMD_EAR | NVMCTRL_CTRLA_CMDEX_KEY; // Erase the user page
while (!(NVMCTRL->INTFLAG.reg & NVMCTRL_INTFLAG_READY)); // Wait for NVM command to complete
NVMCTRL->STATUS.reg |= NVMCTRL_STATUS_MASK; // Clear error flags
NVMCTRL->ADDR.reg = NVMCTRL_AUX0_ADDRESS / 2; // Set address, command will be issued elsewhere
NVMCTRL->CTRLA.reg = NVMCTRL_CTRLA_CMD_PBC | NVMCTRL_CTRLA_CMDEX_KEY; // Erase the page buffer before buffering new data
while (!(NVMCTRL->INTFLAG.reg & NVMCTRL_INTFLAG_READY)); // Wait for NVM command to complete
NVMCTRL->STATUS.reg |= NVMCTRL_STATUS_MASK; // Clear error flags
NVMCTRL->ADDR.reg = NVMCTRL_AUX0_ADDRESS / 2; // Set address, command will be issued elsewhere
*((uint32_t *)NVMCTRL_AUX0_ADDRESS) = user_row; // write the new fuse values to the memory buffer
NVMCTRL->CTRLA.reg = NVMCTRL_CTRLA_CMD_WAP | NVMCTRL_CTRLA_CMDEX_KEY; // Write the user page
NVMCTRL->CTRLB.reg = temp; // Restore settings
printf("Done! Resetting...\n");
delay_ms(1000);
NVIC_SystemReset();
} else {
printf("EEPROM configuration was %d (8192 bytes). Upgrade successful!\n", eeprom);
}
printf("%d %d\n", eeprom, NVMCTRL->PARAM.bit.RWWEEP);
}
void app_prepare_for_standby(void) {
}
void app_wake_from_standby(void) {
}
bool app_loop(void) {
return true;
}
|
