/* Fixes the certificate page so that the app is no longer marked as a trial
* cpu: cpu for the core the application is on
* page: the page the application you want to mark is on
*/
void fix_certificate(TilemCalc* calc, u_int page) {
u_char (*dest)[PAGE_SIZE_W] = (u_char (*)[PAGE_SIZE_W]) calc->mem;
upages_t upages;
state_userpages(calc, &upages);
//there is probably some logic here that I'm missing...
//the 83p wtf is up with that offset
int offset = 0x1E50;
if (calc->hw.model_id == TILEM_CALC_TI83P)
offset = 0x1F18;
//erase the part of the certificate that marks it as a trial app
dest[FLASH_PAGES(calc) - 2][offset + 2 * (upages.start - page)] = 0x80;
dest[FLASH_PAGES(calc) - 2][offset + 1 + 2 * (upages.start - page)] = 0x00;
}
// Verifies that update-start command is valid.
// Will enter RECEIVING_FIRMWARE state if everything checks out.
static void startFirmwareUpdate()
{
uint8_t i, checksum = 0;//, reset_vector[3];
// Calculate checksum
for (i = 0; i < UPDATE_START_LENGTH; i++) {
checksum += MSG_PAYLOAD(i);
}
// Checksum fail
if (checksum != 0) {
send_buf[1] = ERROR_CHECKSUM_FAIL;
send(CMD_NACK,2);
return;
}
// Get firmware size, NOT including reset vector
bytes_total = MSG_ST_BYTES;
// Check that firmware is within legal size range.
if (bytes_total > FLASH_FW_MAX_SIZE) {
// Send error report to host.
send_buf[1] = ERROR_ILLEGAL_SIZE;
send(CMD_NACK,2);
return;
}
// Get firmware's reset vector.
temp_data[0] = MSG_ST_RESET_OPCODE;
temp_data[1] = MSG_ST_RESET_ADDR_H;
temp_data[2] = MSG_ST_RESET_ADDR_L;
// Write reset vector to non-volatile flash
flash_erase_page(FW_NV_DATA_PAGE);
flash_write_bytes(FW_RESET_VECTOR, temp_data, 3);
// Get firmware serial number. Will be written to NV when update complete.
firmware_number = MSG_ST_NUMBER;
bytes_received = 0;
/*
// Read out old reset vector.
movx_access_code();
flash_read_bytes(0x0000, reset_vector, 3);
movx_access_data();
// Erase first page, containing reset vector.
flash_erase_page(0);
// Write back the old reset vector.
movx_access_code();
flash_write_bytes(0x0000, reset_vector, 3);
movx_access_data();
// Erase the reset of pages available to firmware.
*/
for (i = BOOTLOADER_PAGES; i < BOOTLOADER_PAGES+FLASH_PAGES(bytes_total); ++i) {
flash_erase_page(i);
}
send(CMD_ACK,1);
if (send_success) state = RECEIVING_FIRMWARE;
else state = PINGING;
return;
}
LINK_ERR forceload_os(TilemCalc* calc, TIFILE_t *tifile) {
int flash_pages = FLASH_PAGES(calc);
u_int i, page;
u_char (*dest)[PAGE_SIZE_W] = (u_char (*)[PAGE_SIZE_W]) calc->mem;
if (dest == NULL)
return LERR_MODEL;
if (tifile->flash == NULL)
return LERR_FILE;
for (i = 0; i < ARRAYSIZE(tifile->flash->data); i++) {
if (tifile->flash->data[i] == NULL) {
continue;
}
if (i > 0x10) {
page = i + flash_pages - 0x20;
} else {
page = i;
}
int sector = (page / 4) * 4;
int size;
if (sector >= flash_pages - 4) {
size = PAGE_SIZE_W * 2;
} else {
size = PAGE_SIZE_W * 4;
}
memset(dest[sector], 0xFF, size);
}
for (i = 0; i < ARRAYSIZE(tifile->flash->data); i++) {
if (tifile->flash->data[i] == NULL) {
continue;
}
if (i > 0x10) {
page = i + flash_pages - 0x20;
} else {
page = i;
}
memcpy(dest[page], tifile->flash->data[i], PAGE_SIZE_W);
}
//valid OS
dest[0][0x56] = 0x5A;
dest[0][0x57] = 0xA5;
return LERR_SUCCESS;
}
