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bootloader
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yeaaah sonic!

This commit is contained in:
yul 2022-05-28 19:30:55 +02:00
parent 84caa2db3b
commit 02cc22e6ae
5 changed files with 115 additions and 76 deletions
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47
bootloader.c
View File

@ -31,6 +31,8 @@ char* argvs[3][10];
cmd_t cmd;
uint32_t* size_store = (uint32_t*) 0x3400;
crc_t* crc_store = (crc_t*) 0x3000;
uint32_t offset, total_size, offset_pointer;
@ -43,9 +45,48 @@ crc_t crc_prog, crc_data;
char buff[256];
int is_code_valid(){
crc_t expected_crc = *crc_store;
size_t application_size = *size_store;
crc_t real_crc = crc_init();
real_crc = crc_update(real_crc, (void*)APP_OFFSET, application_size);
real_crc = crc_finalize(real_crc);
error_code is_error = uart_commands_check(real_crc, expected_crc);
if(is_error == ok){
return 1;
}
else return 0;
}
void write_app_info(crc_t* checksum, size_t* size){
iap_prepare_sectors(&status, addr_to_sector(0x3000), addr_to_sector(0x3fff));
if(status != ok){
uart_send_err();
}
iap_erase_sectors(&status, addr_to_sector(0x3000), addr_to_sector(0x3fff));
if(status != ok){
uart_send_err();
}
iap_prepare_sectors(&status, addr_to_sector(0x3000), addr_to_sector(0x3fff));
if(status != ok){
uart_send_err();
}
iap_copy_to_flash(&status, (long unsigned int *)crc_store, (long unsigned int*)checksum, 0x0400);
iap_copy_to_flash(&status, (long unsigned int *)size_store, (long unsigned int*)size, 0x0400);
}
int main(void) {
cmd.argv = argvs;
cmd.argv = (char**)argvs;
//verify b is pressed
//checksum is correct (
//bootloader_init();
uart_init(115200);
if(is_code_valid()){
SCB->VTOR = APP_OFFSET;
__asm("ldr r0,=0x4000");
__asm("ldr sp,[r0]");
__asm("ldr pc,[r0,#4]");
}else{
while(1){
uart_receive_command(buff);
uart_parse_command(buff, &cmd);
@ -59,7 +100,7 @@ int main(void) {
crc_prog = uart_string_to_int(cmd.argv[3]);
total_size = uart_string_to_int(cmd.argv[2]);
offset = uart_string_to_int(cmd.argv[1]);
SCB->VTOR = offset;
write_app_info(&crc_prog, (unsigned int *)&total_size);
crc_data = uart_commands_prog(&status, total_size);
offset_pointer = offset;
@ -67,7 +108,6 @@ int main(void) {
int size = uart_string_to_int(cmd.argv[1]);
crc_t local_checksum = uart_string_to_int(cmd.argv[2]);
uart_commands_data(&status, size, &crc_data, local_checksum, offset_pointer);
//uart_commands_data(&status, size, &crc_data, crc_data, offset_pointer);
if(status == 0) offset_pointer += size;
}else if(strncmp("CHECK", cmd.argv[0], 5)==0){
@ -80,6 +120,7 @@ int main(void) {
}
}
}
while(1);
return 0 ;
}

42
iap.c
View File

@ -14,11 +14,39 @@
#include "iap.h"
uint32_t command[5];
uint32_t output[5];
unsigned int command[5];
unsigned int output[5];
IAP iap_entry =(IAP) IAP_LOCATION;
int addr_to_sector(int addr){
int tmp = addr & 0xfffff;
tmp = tmp >> 12;
if(tmp <= 15) return tmp;
else{
if(tmp >= 0x10 && tmp <=0x17)
return 16;
else if(tmp >= 0x18 && tmp <= 0x1f)
return 17;
else if(tmp >= 0x20 && tmp <= 0x27)
return 18;
else if(tmp >= 0x28 && tmp <= 0x2f)
return 19;
else if(tmp >= 0x30 && tmp <= 0x37)
return 20;
else if(tmp >= 0x38 && tmp <= 0x3f)
return 21;
else if(tmp >= 0x40 && tmp <= 0x47)
return 22;
else if(tmp >= 0x48 && tmp <= 0x4f)
return 23;
else if(tmp >= 0x50 && tmp <= 0x57) return 24;
else if(tmp >= 0x58 && tmp <= 0x3f) return 25;
else if(tmp >= 0x60 && tmp <= 0x67) return 26;
else if(tmp >= 0x68 && tmp <= 0x6f) return 27;
else if(tmp >= 0x70 && tmp <= 0x77) return 28;
else if(tmp >= 0x78 && tmp <= 0x7f) return 29;
}
}
void iap_entry_wrapped(void){
__disable_irq();
@ -66,10 +94,8 @@ uint32_t iap_read_part_id(error_code* status){
}
}
void iap_copy_to_flash(error_code* status, int dst_flash, uint32_t* src_ram, int num_bytes){
//iap_prepare_sectors(status, dst_flash, dst_flash+num_bytes);
//iap_erase_sectors(status, dst_flash, dst_flash+num_bytes);
iap_prepare_sectors(status, dst_flash, dst_flash+num_bytes);
void iap_copy_to_flash(error_code* status, long unsigned int * dst_flash, long unsigned int* src_ram, int num_bytes){
iap_prepare_sectors(status, addr_to_sector(dst_flash), addr_to_sector(dst_flash+num_bytes));
command[0] = 51;
command[1] = dst_flash;
command[2] = src_ram;
@ -94,7 +120,7 @@ void iap_read_serial(error_code* status, uint32_t* res){
res[2] = output[3];
res[3] = output[4];
}else{
*status = -1;
*status = output[0];
}
}

8
iap.h
View File

@ -26,14 +26,18 @@ typedef enum _error_code {
typedef void (*IAP)(unsigned int[], unsigned int[]);
/*This command must be executed before executing "Copy RAM to Flash" or
"Erase Sector(s)" command. Successful execution of the "Copy RAM to Flash" or
"Erase Sector(s)" command causes relevant sectors to be protected again. To
prepare a single sector use the same "Start" and "End" sector numbers.*/
void iap_prepare_sectors(error_code* status, int start, int end);
void iap_erase_sectors(error_code* status, int start, int end);
void iap_copy_to_flash(error_code* status, int dst_flash, uint32_t* src_ram, int num_bytes);
void iap_copy_to_flash(error_code* status, long unsigned int * dst_flash, long unsigned int* src_ram, int num_bytes);
uint32_t iap_read_part_id(error_code* status);
void iap_read_serial(error_code* status, uint32_t* res);
int addr_to_sector(int addr);

41
uart_commands.c
View File

@ -103,47 +103,19 @@ void digit_to_str(char* str, uint32_t number, int base){
str[tmp_counter] = '\0';
}*/
int addr_to_sector(int addr){
int tmp = addr & 0xfffff;
tmp = tmp >> 12;
if(tmp <= 15) return tmp;
else{
if(tmp >= 0x10 && tmp <=0x17)
return 16;
else if(tmp >= 0x18 && tmp <= 0x1f)
return 17;
else if(tmp >= 0x20 && tmp <= 0x27)
return 18;
else if(tmp >= 0x28 && tmp <= 0x2f)
return 19;
else if(tmp >= 0x30 && tmp <= 0x37)
return 20;
else if(tmp >= 0x38 && tmp <= 0x3f)
return 21;
else if(tmp >= 0x40 && tmp <= 0x47)
return 22;
else if(tmp >= 0x48 && tmp <= 0x4f)
return 23;
else if(tmp >= 0x50 && tmp <= 0x57) return 24;
else if(tmp >= 0x58 && tmp <= 0x3f) return 25;
else if(tmp >= 0x60 && tmp <= 0x67) return 26;
else if(tmp >= 0x68 && tmp <= 0x6f) return 27;
else if(tmp >= 0x70 && tmp <= 0x77) return 28;
else if(tmp >= 0x78 && tmp <= 0x7f) return 29;
}
}
void uart_commands_getid(error_code* status){
char hex[15] = "0x26113f37\r\n";
//char hex[15];
//char hex[15] = "0x26113f37\r\n";
char hex[15];
uint32_t res = iap_read_part_id(status);
//digit_to_str(hex+1, res, 16);
digit_to_str(hex+2, res, 16);
hex[0]='0';
hex[1]='x';
//sprintf(hex, "0x%x\r\n", res);
if(*status == 0){
uart_send_ok();
uart_send(hex, strlen(hex));
uart_send("\r\n", 2);
}
}
@ -166,11 +138,10 @@ void uart_commands_getserial(error_code* status){
}
crc_t uart_commands_prog(error_code* status, int size){
//iap_prepare_sectors(status, APP_OFFSET, APP_OFFSET+size/4095+5);
char digit;
int start = addr_to_sector(APP_OFFSET);
int end = addr_to_sector(APP_OFFSET+size);
iap_prepare_sectors(status, addr_to_sector(APP_OFFSET), addr_to_sector(APP_OFFSET+size));
char digit;
if(*status != ok){
uart_send_err();
itoa(*status, &digit, 10);
@ -201,8 +172,6 @@ error_code uart_commands_data(error_code* status, int size, crc_t* checksum_glob
int offset_counter = offset;
if(checksum_loc == checksum_tmp){
int tmp = size;
//iap_prepare_sectors(status, APP_OFFSET, APP_OFFSET+size/4095+1);
//iap_erase_sectors(status, APP_OFFSET, APP_OFFSET+size/4095+1);
iap_prepare_sectors(status, addr_to_sector(offset), addr_to_sector(offset+size)+1);
*checksum_global = crc_update(*checksum_global, data, size);
//verify if size == 4095 if smaller

1
uart_commands.h
View File

@ -35,7 +35,6 @@ void uart_send_ok();
void uart_send_err();
int addr_to_sector(int addr);
void digit_to_str(char* str, uint32_t number, int base);