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/*
* mgmt-dfu.c
* ---------
* Management CLI Device Firmware Upgrade code.
*
* Copyright (c) 2016, NORDUnet A/S All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of the NORDUnet nor the names of its contributors may
* be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "stm-init.h"
#include "mgmt-cli.h"
#include "stm-uart.h"
#include "cmsis_nvic.h"
#include <string.h>
#define DFU_BASE_ADDRESS 0x08100000
#define DFU_BASE_PTR (__IO uint32_t *) DFU_BASE_ADDRESS
extern uint32_t update_crc(uint32_t crc, uint8_t *buf, int len);
/* The chunk size have to be a multiple of the SPI flash page size (256 bytes),
and it has to match the chunk size in the program sending the bitstream over the UART.
*/
#define DFU_UPLOAD_CHUNK_SIZE 256
int cmd_dfu_upload(struct cli_def *cli, const char *command, char *argv[], int argc)
{
uint32_t filesize = 0, crc = 0, my_crc = 0, counter = 0, i, j;
uint32_t offset = 0, n = DFU_UPLOAD_CHUNK_SIZE;
uint32_t buf[DFU_UPLOAD_CHUNK_SIZE / 4];
FLASH_EraseInitTypeDef FLASH_EraseInitStruct;
uint32_t SectorError = 0;
cli_print(cli, "OK, write DFU application file size (4 bytes), data in %i byte chunks, CRC-32 (4 bytes)",
DFU_UPLOAD_CHUNK_SIZE);
/* Read file size (4 bytes) */
uart_receive_bytes(STM_UART_MGMT, (void *) &filesize, 4, 1000);
cli_print(cli, "File size %li", filesize);
HAL_FLASH_Unlock();
FLASH_EraseInitStruct.TypeErase = TYPEERASE_SECTORS;
FLASH_EraseInitStruct.Sector = 12; /* the sector for DFU_BASE_ADDRESS (0x08100000) */
FLASH_EraseInitStruct.NbSectors = 1;
FLASH_EraseInitStruct.VoltageRange = VOLTAGE_RANGE_3;
if (HAL_FLASHEx_Erase(&FLASH_EraseInitStruct, &SectorError) != HAL_OK) {
cli_print(cli, "Failed erasing flash sector");
return CLI_ERROR;
}
while (filesize) {
/* By initializing buf to the same value that erased flash has (0xff), we don't
* have to try and be smart when writing the last page of data to the memory.
*/
memset(buf, 0xffffffff, sizeof(buf));
if (filesize < n) {
n = filesize;
}
if (uart_receive_bytes(STM_UART_MGMT, (void *) &buf, n, 1000) != HAL_OK) {
cli_print(cli, "Receive timed out");
return CLI_ERROR;
}
filesize -= n;
/* After reception of a chunk but before ACKing we have "all" the time in the world to
* calculate CRC and write it to flash.
*/
my_crc = update_crc(my_crc, (uint8_t *) buf, n);
for (i = 0; i < DFU_UPLOAD_CHUNK_SIZE / 4; i++) {
if ((j = HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, DFU_BASE_ADDRESS + offset, buf[i])) != HAL_OK) {
cli_print(cli, "Failed writing data at offset %li: %li", offset, j);
return CLI_ERROR;
}
offset += 4;
}
/* ACK this chunk by sending the current chunk counter (4 bytes) */
counter++;
uart_send_bytes(STM_UART_MGMT, (void *) &counter, 4);
}
HAL_FLASH_Lock();
/* The sending side will now send it's calculated CRC-32 */
cli_print(cli, "Send CRC-32");
uart_receive_bytes(STM_UART_MGMT, (void *) &crc, 4, 1000);
cli_print(cli, "CRC-32 %li", crc);
if (crc == my_crc) {
cli_print(cli, "CRC checksum MATCHED");
} else {
cli_print(cli, "CRC checksum did NOT match");
}
return CLI_OK;
}
int cmd_dfu_dump(struct cli_def *cli, const char *command, char *argv[], int argc)
{
cli_print(cli, "First 256 bytes from DFU application address %p:\r\n", DFU_BASE_PTR);
uart_send_hexdump(STM_UART_MGMT, (uint8_t *) DFU_BASE_PTR, 0, 0xff);
uart_send_string2(STM_UART_MGMT, (char *) "\r\n\r\n");
return CLI_OK;
}
typedef int (*pFunction)(void);
int cmd_dfu_jump(struct cli_def *cli, const char *command, char *argv[], int argc)
{
uint32_t new_msp, i;
/* Load first byte from the DFU_BASE_PTR to verify it contains an IVT before
* jumping there.
*/
new_msp = *DFU_BASE_PTR;
i = new_msp & 0xFF000000;
/* 'i' is supposed to be a pointer to the new applications stack, it should
* point either at RAM (0x20000000) or at the CCM memory (0x10000000).
*/
if (i == 0x20000000 || i == 0x10000000) {
uint32_t jmp_to = *(DFU_BASE_PTR + 1);
pFunction loaded_app = (pFunction) jmp_to;
__disable_irq();
HAL_NVIC_DisableIRQ(SysTick_IRQn);
HAL_DeInit();
/* Relocate interrupt vector table */
//NVIC_SetVectorTable(DFU_BASE_ADDRESS);
SCB->VTOR == DFU_BASE_ADDRESS;
NVIC_SetVector(WWDG_IRQn, *DFU_BASE_PTR + 1);
/* Re-initialize stack pointer */
__set_MSP(new_msp);
/* Jump to the DFU loaded application */
loaded_app();
Error_Handler();
} else {
cli_print(cli, "No loaded application found at %p", DFU_BASE_PTR);
}
return CLI_OK;
}
void configure_cli_dfu(struct cli_def *cli)
{
cli_command_root(dfu);
cli_command_node(dfu, dump, "Show the first 256 bytes of the loaded application");
cli_command_node(dfu, jump, "Jump to the loaded application");
cli_command_node(dfu, upload, "Load a new application");
}
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