91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <hw/mem.h>
|
|
|
|
#include "config.h"
|
|
|
|
#define FLASH_OFFSET_CONFIG (FLASH_OFFSET_APP + FLASH_BLOCK_SIZE)
|
|
|
|
static volatile unsigned short *flash_config = (unsigned short *)(0x80000000 | FLASH_OFFSET_CONFIG);
|
|
|
|
static void wait_program(void)
|
|
{
|
|
while(!(*flash_config & 0x0080)); /* Read status register */
|
|
*flash_config = 0x0050; /* Clear status register */
|
|
*flash_config = 0x00ff; /* Go to Read Array mode */
|
|
}
|
|
|
|
static void config_erase_block(void)
|
|
{
|
|
*flash_config = 0x0020; /* Setup Erase */
|
|
*flash_config = 0x00d0; /* Confirm Erase */
|
|
wait_program();
|
|
}
|
|
|
|
static void config_write(int offset, unsigned short data)
|
|
{
|
|
flash_config[offset] = 0x0040; /* Word Program */
|
|
flash_config[offset] = data;
|
|
wait_program();
|
|
}
|
|
|
|
static const unsigned char config_defaults[CONFIG_KEY_COUNT] = CONFIG_DEFAULTS;
|
|
static int config_record_count;
|
|
static unsigned char config_values[CONFIG_KEY_COUNT];
|
|
|
|
static int config_process_record(unsigned char key, unsigned char value)
|
|
{
|
|
if(key >= CONFIG_KEY_COUNT)
|
|
return 0;
|
|
config_record_count++;
|
|
config_values[key] = value;
|
|
return 1;
|
|
}
|
|
|
|
void config_init(void)
|
|
{
|
|
volatile unsigned int *flash_config32 = (unsigned int *)flash_config;
|
|
int i;
|
|
unsigned int flash_word;
|
|
|
|
memcpy(config_values, config_defaults, CONFIG_KEY_COUNT);
|
|
|
|
for(i=0;i<FLASH_BLOCK_SIZE/4;i++) {
|
|
flash_word = flash_config32[i];
|
|
if(!config_process_record((flash_word >> 24) & 0xff, (flash_word >> 16) & 0xff))
|
|
break;
|
|
if(!config_process_record((flash_word >> 8) & 0xff, flash_word & 0xff))
|
|
break;
|
|
}
|
|
}
|
|
|
|
void config_write_all(void)
|
|
{
|
|
int i;
|
|
|
|
config_erase_block();
|
|
config_record_count = 0;
|
|
for(i=0;i<CONFIG_KEY_COUNT;i++) {
|
|
if(config_values[i] != config_defaults[i]) {
|
|
config_write(config_record_count, (i << 8) | config_values[i]);
|
|
config_record_count++;
|
|
}
|
|
}
|
|
}
|
|
|
|
unsigned char config_get(unsigned char key)
|
|
{
|
|
return config_values[key];
|
|
}
|
|
|
|
void config_set(unsigned char key, unsigned char value)
|
|
{
|
|
if(config_values[key] == value)
|
|
return;
|
|
config_values[key] = value;
|
|
if(config_record_count < FLASH_BLOCK_SIZE/2)
|
|
config_write(config_record_count++, (key << 8) | value);
|
|
else
|
|
config_write_all();
|
|
}
|