650 lines
18 KiB
C
650 lines
18 KiB
C
/**
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******************************************************************************
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* @file IAP_Main/Src/ymodem.c
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* @author MCD Application Team
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* @brief This file provides all the software functions related to the ymodem
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* protocol.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/** @addtogroup STM32F1xx_IAP
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* @{
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "flash_if.h"
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#include "common.h"
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#include "ymodem.h"
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#include "string.h"
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#include "main.h"
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#include "menu.h"
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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#define CRC16_F /* activate the CRC16 integrity */
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* @note ATTENTION - please keep this variable 32bit aligned */
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uint8_t aPacketData[PACKET_1K_SIZE + PACKET_DATA_INDEX + PACKET_TRAILER_SIZE];
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/* Private function prototypes -----------------------------------------------*/
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static void PrepareIntialPacket(uint8_t *p_data, const uint8_t *p_file_name, uint32_t length);
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static void PreparePacket(uint8_t *p_source, uint8_t *p_packet, uint8_t pkt_nr, uint32_t size_blk);
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static HAL_StatusTypeDef ReceivePacket(uint8_t *p_data, uint32_t *p_length, uint32_t timeout);
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uint16_t UpdateCRC16(uint16_t crc_in, uint8_t byte);
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uint16_t Cal_CRC16(const uint8_t* p_data, uint32_t size);
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uint8_t CalcChecksum(const uint8_t *p_data, uint32_t size);
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/* Private functions ---------------------------------------------------------*/
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/**
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* @brief Receive a packet from sender
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* @param data
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* @param length
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* 0: end of transmission
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* 2: abort by sender
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* >0: packet length
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* @param timeout
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* @retval HAL_OK: normally return
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* HAL_BUSY: abort by user
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*/
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static HAL_StatusTypeDef ReceivePacket(uint8_t *p_data, uint32_t *p_length, uint32_t timeout)
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{
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uint32_t crc;
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uint32_t packet_size = 0;
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HAL_StatusTypeDef status;
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uint8_t char1;
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*p_length = 0;
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status = HAL_UART_Receive(&UartHandle, &char1, 1, timeout);
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if (status == HAL_OK)
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{
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switch (char1)
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{
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case SOH:
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packet_size = PACKET_SIZE;
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break;
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case STX:
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packet_size = PACKET_1K_SIZE;
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break;
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case EOT:
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break;
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case CA:
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if ((HAL_UART_Receive(&UartHandle, &char1, 1, timeout) == HAL_OK) && (char1 == CA))
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{
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packet_size = 2;
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}
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else
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{
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status = HAL_ERROR;
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}
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break;
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case ABORT1:
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case ABORT2:
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status = HAL_BUSY;
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break;
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default:
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status = HAL_ERROR;
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break;
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}
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*p_data = char1;
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if (packet_size >= PACKET_SIZE )
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{
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status = HAL_UART_Receive(&UartHandle, &p_data[PACKET_NUMBER_INDEX], packet_size + PACKET_OVERHEAD_SIZE, timeout);
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/* Simple packet sanity check */
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if (status == HAL_OK )
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{
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if (p_data[PACKET_NUMBER_INDEX] != ((p_data[PACKET_CNUMBER_INDEX]) ^ NEGATIVE_BYTE))
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{
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packet_size = 0;
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status = HAL_ERROR;
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}
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else
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{
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/* Check packet CRC */
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crc = p_data[ packet_size + PACKET_DATA_INDEX ] << 8;
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crc += p_data[ packet_size + PACKET_DATA_INDEX + 1 ];
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if (Cal_CRC16(&p_data[PACKET_DATA_INDEX], packet_size) != crc )
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{
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packet_size = 0;
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status = HAL_ERROR;
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}
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}
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}
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else
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{
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packet_size = 0;
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}
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}
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}
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*p_length = packet_size;
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return status;
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}
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/**
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* @brief Prepare the first block
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* @param p_data: output buffer
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* @param p_file_name: name of the file to be sent
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* @param length: length of the file to be sent in bytes
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* @retval None
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*/
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static void PrepareIntialPacket(uint8_t *p_data, const uint8_t *p_file_name, uint32_t length)
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{
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uint32_t i, j = 0;
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uint8_t astring[10];
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/* first 3 bytes are constant */
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p_data[PACKET_START_INDEX] = SOH;
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p_data[PACKET_NUMBER_INDEX] = 0x00;
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p_data[PACKET_CNUMBER_INDEX] = 0xff;
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/* Filename written */
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for (i = 0; (p_file_name[i] != '\0') && (i < FILE_NAME_LENGTH); i++)
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{
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p_data[i + PACKET_DATA_INDEX] = p_file_name[i];
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}
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p_data[i + PACKET_DATA_INDEX] = 0x00;
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/* file size written */
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Int2Str (astring, length);
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i = i + PACKET_DATA_INDEX + 1;
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while (astring[j] != '\0')
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{
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p_data[i++] = astring[j++];
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}
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/* padding with zeros */
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for (j = i; j < PACKET_SIZE + PACKET_DATA_INDEX; j++)
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{
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p_data[j] = 0;
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}
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}
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/**
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* @brief Prepare the data packet
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* @param p_source: pointer to the data to be sent
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* @param p_packet: pointer to the output buffer
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* @param pkt_nr: number of the packet
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* @param size_blk: length of the block to be sent in bytes
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* @retval None
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*/
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static void PreparePacket(uint8_t *p_source, uint8_t *p_packet, uint8_t pkt_nr, uint32_t size_blk)
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{
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uint8_t *p_record;
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uint32_t i, size, packet_size;
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/* Make first three packet */
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packet_size = size_blk >= PACKET_1K_SIZE ? PACKET_1K_SIZE : PACKET_SIZE;
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size = size_blk < packet_size ? size_blk : packet_size;
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if (packet_size == PACKET_1K_SIZE)
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{
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p_packet[PACKET_START_INDEX] = STX;
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}
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else
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{
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p_packet[PACKET_START_INDEX] = SOH;
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}
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p_packet[PACKET_NUMBER_INDEX] = pkt_nr;
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p_packet[PACKET_CNUMBER_INDEX] = (~pkt_nr);
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p_record = p_source;
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/* Filename packet has valid data */
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for (i = PACKET_DATA_INDEX; i < size + PACKET_DATA_INDEX;i++)
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{
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p_packet[i] = *p_record++;
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}
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if ( size <= packet_size)
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{
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for (i = size + PACKET_DATA_INDEX; i < packet_size + PACKET_DATA_INDEX; i++)
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{
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p_packet[i] = 0x1A; /* EOF (0x1A) or 0x00 */
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}
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}
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}
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/**
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* @brief Update CRC16 for input byte
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* @param crc_in input value
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* @param input byte
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* @retval None
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*/
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uint16_t UpdateCRC16(uint16_t crc_in, uint8_t byte)
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{
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uint32_t crc = crc_in;
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uint32_t in = byte | 0x100;
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do
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{
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crc <<= 1;
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in <<= 1;
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if(in & 0x100)
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++crc;
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if(crc & 0x10000)
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crc ^= 0x1021;
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}
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while(!(in & 0x10000));
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return crc & 0xffffu;
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}
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/**
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* @brief Cal CRC16 for YModem Packet
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* @param data
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* @param length
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* @retval None
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*/
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uint16_t Cal_CRC16(const uint8_t* p_data, uint32_t size)
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{
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uint32_t crc = 0;
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const uint8_t* dataEnd = p_data+size;
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while(p_data < dataEnd)
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crc = UpdateCRC16(crc, *p_data++);
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crc = UpdateCRC16(crc, 0);
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crc = UpdateCRC16(crc, 0);
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return crc&0xffffu;
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}
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/**
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* @brief Calculate Check sum for YModem Packet
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* @param p_data Pointer to input data
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* @param size length of input data
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* @retval uint8_t checksum value
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*/
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uint8_t CalcChecksum(const uint8_t *p_data, uint32_t size)
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{
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uint32_t sum = 0;
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const uint8_t *p_data_end = p_data + size;
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while (p_data < p_data_end )
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{
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sum += *p_data++;
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}
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return (sum & 0xffu);
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}
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/* Public functions ---------------------------------------------------------*/
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/**
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* @brief Receive a file using the ymodem protocol with CRC16.
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* @param p_size The size of the file.
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* @retval COM_StatusTypeDef result of reception/programming
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*/
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COM_StatusTypeDef Ymodem_Receive ( uint32_t *p_size )
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{
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uint32_t i, packet_length, session_done = 0, file_done, errors = 0, session_begin = 0;
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uint32_t flashdestination, ramsource, filesize;
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uint8_t *file_ptr;
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uint8_t file_size[FILE_SIZE_LENGTH], tmp, packets_received;
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COM_StatusTypeDef result = COM_OK;
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/* Initialize flashdestination variable */
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flashdestination = APPLICATION_ADDRESS;
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while ((session_done == 0) && (result == COM_OK))
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{
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packets_received = 0;
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file_done = 0;
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while ((file_done == 0) && (result == COM_OK))
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{
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switch (ReceivePacket(aPacketData, &packet_length, DOWNLOAD_TIMEOUT))
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{
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case HAL_OK:
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errors = 0;
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switch (packet_length)
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{
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case 2:
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/* Abort by sender */
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Serial_PutByte(ACK);
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result = COM_ABORT;
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break;
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case 0:
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/* End of transmission */
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Serial_PutByte(ACK);
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file_done = 1;
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break;
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default:
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/* Normal packet */
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if (aPacketData[PACKET_NUMBER_INDEX] != packets_received)
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{
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Serial_PutByte(NAK);
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}
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else
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{
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if (packets_received == 0)
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{
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/* File name packet */
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if (aPacketData[PACKET_DATA_INDEX] != 0)
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{
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/* File name extraction */
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i = 0;
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file_ptr = aPacketData + PACKET_DATA_INDEX;
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while ( (*file_ptr != 0) && (i < FILE_NAME_LENGTH))
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{
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aFileName[i++] = *file_ptr++;
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}
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/* File size extraction */
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aFileName[i++] = '\0';
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i = 0;
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file_ptr ++;
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while ( (*file_ptr != ' ') && (i < FILE_SIZE_LENGTH))
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{
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file_size[i++] = *file_ptr++;
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}
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file_size[i++] = '\0';
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Str2Int(file_size, &filesize);
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/* Test the size of the image to be sent */
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/* Image size is greater than Flash size */
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if (*p_size > (USER_FLASH_SIZE + 1))
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{
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/* End session */
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tmp = CA;
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HAL_UART_Transmit(&UartHandle, &tmp, 1, NAK_TIMEOUT);
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HAL_UART_Transmit(&UartHandle, &tmp, 1, NAK_TIMEOUT);
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result = COM_LIMIT;
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}
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/* erase user application area */
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FLASH_If_Erase(APPLICATION_ADDRESS);
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*p_size = filesize;
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Serial_PutByte(ACK);
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Serial_PutByte(CRC16);
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}
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/* File header packet is empty, end session */
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else
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{
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Serial_PutByte(ACK);
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file_done = 1;
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session_done = 1;
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break;
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}
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}
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else /* Data packet */
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{
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ramsource = (uint32_t) & aPacketData[PACKET_DATA_INDEX];
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/* Write received data in Flash */
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if (FLASH_If_Write(flashdestination, (uint32_t*) ramsource, packet_length/4) == FLASHIF_OK)
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{
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flashdestination += packet_length;
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Serial_PutByte(ACK);
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}
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else /* An error occurred while writing to Flash memory */
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{
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/* End session */
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Serial_PutByte(CA);
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Serial_PutByte(CA);
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result = COM_DATA;
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}
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}
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packets_received ++;
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session_begin = 1;
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}
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break;
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}
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break;
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case HAL_BUSY: /* Abort actually */
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Serial_PutByte(CA);
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Serial_PutByte(CA);
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result = COM_ABORT;
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break;
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default:
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if (session_begin > 0)
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{
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errors ++;
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}
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if (errors > MAX_ERRORS)
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{
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/* Abort communication */
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Serial_PutByte(CA);
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Serial_PutByte(CA);
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}
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else
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{
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Serial_PutByte(CRC16); /* Ask for a packet */
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}
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break;
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}
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}
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}
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return result;
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}
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/**
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* @brief Transmit a file using the ymodem protocol
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* @param p_buf: Address of the first byte
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* @param p_file_name: Name of the file sent
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* @param file_size: Size of the transmission
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* @retval COM_StatusTypeDef result of the communication
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*/
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COM_StatusTypeDef Ymodem_Transmit (uint8_t *p_buf, const uint8_t *p_file_name, uint32_t file_size)
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{
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uint32_t errors = 0, ack_recpt = 0, size = 0, pkt_size;
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uint8_t *p_buf_int;
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COM_StatusTypeDef result = COM_OK;
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uint32_t blk_number = 1;
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uint8_t a_rx_ctrl[2];
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uint8_t i;
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#ifdef CRC16_F
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uint32_t temp_crc;
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#else /* CRC16_F */
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uint8_t temp_chksum;
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#endif /* CRC16_F */
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/* Prepare first block - header */
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PrepareIntialPacket(aPacketData, p_file_name, file_size);
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while (( !ack_recpt ) && ( result == COM_OK ))
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{
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/* Send Packet */
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HAL_UART_Transmit(&UartHandle, &aPacketData[PACKET_START_INDEX], PACKET_SIZE + PACKET_HEADER_SIZE, NAK_TIMEOUT);
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/* Send CRC or Check Sum based on CRC16_F */
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#ifdef CRC16_F
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temp_crc = Cal_CRC16(&aPacketData[PACKET_DATA_INDEX], PACKET_SIZE);
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Serial_PutByte(temp_crc >> 8);
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Serial_PutByte(temp_crc & 0xFF);
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#else /* CRC16_F */
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temp_chksum = CalcChecksum (&aPacketData[PACKET_DATA_INDEX], PACKET_SIZE);
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Serial_PutByte(temp_chksum);
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#endif /* CRC16_F */
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/* Wait for Ack and 'C' */
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if (HAL_UART_Receive(&UartHandle, &a_rx_ctrl[0], 1, NAK_TIMEOUT) == HAL_OK)
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{
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if (a_rx_ctrl[0] == ACK)
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{
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ack_recpt = 1;
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}
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else if (a_rx_ctrl[0] == CA)
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{
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if ((HAL_UART_Receive(&UartHandle, &a_rx_ctrl[0], 1, NAK_TIMEOUT) == HAL_OK) && (a_rx_ctrl[0] == CA))
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{
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HAL_Delay( 2 );
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__HAL_UART_FLUSH_DRREGISTER(&UartHandle);
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result = COM_ABORT;
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}
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}
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}
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else
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{
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errors++;
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}
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if (errors >= MAX_ERRORS)
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{
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result = COM_ERROR;
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}
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}
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p_buf_int = p_buf;
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size = file_size;
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/* Here 1024 bytes length is used to send the packets */
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while ((size) && (result == COM_OK ))
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{
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/* Prepare next packet */
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PreparePacket(p_buf_int, aPacketData, blk_number, size);
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ack_recpt = 0;
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a_rx_ctrl[0] = 0;
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errors = 0;
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/* Resend packet if NAK for few times else end of communication */
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while (( !ack_recpt ) && ( result == COM_OK ))
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{
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/* Send next packet */
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if (size >= PACKET_1K_SIZE)
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{
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pkt_size = PACKET_1K_SIZE;
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}
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else
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{
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pkt_size = PACKET_SIZE;
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}
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HAL_UART_Transmit(&UartHandle, &aPacketData[PACKET_START_INDEX], pkt_size + PACKET_HEADER_SIZE, NAK_TIMEOUT);
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/* Send CRC or Check Sum based on CRC16_F */
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#ifdef CRC16_F
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temp_crc = Cal_CRC16(&aPacketData[PACKET_DATA_INDEX], pkt_size);
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Serial_PutByte(temp_crc >> 8);
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Serial_PutByte(temp_crc & 0xFF);
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#else /* CRC16_F */
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temp_chksum = CalcChecksum (&aPacketData[PACKET_DATA_INDEX], pkt_size);
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Serial_PutByte(temp_chksum);
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#endif /* CRC16_F */
|
|
|
|
/* Wait for Ack */
|
|
if ((HAL_UART_Receive(&UartHandle, &a_rx_ctrl[0], 1, NAK_TIMEOUT) == HAL_OK) && (a_rx_ctrl[0] == ACK))
|
|
{
|
|
ack_recpt = 1;
|
|
if (size > pkt_size)
|
|
{
|
|
p_buf_int += pkt_size;
|
|
size -= pkt_size;
|
|
if (blk_number == (USER_FLASH_SIZE / PACKET_1K_SIZE))
|
|
{
|
|
result = COM_LIMIT; /* boundary error */
|
|
}
|
|
else
|
|
{
|
|
blk_number++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
p_buf_int += pkt_size;
|
|
size = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
errors++;
|
|
}
|
|
|
|
/* Resend packet if NAK for a count of 10 else end of communication */
|
|
if (errors >= MAX_ERRORS)
|
|
{
|
|
result = COM_ERROR;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Sending End Of Transmission char */
|
|
ack_recpt = 0;
|
|
a_rx_ctrl[0] = 0x00;
|
|
errors = 0;
|
|
while (( !ack_recpt ) && ( result == COM_OK ))
|
|
{
|
|
Serial_PutByte(EOT);
|
|
|
|
/* Wait for Ack */
|
|
if (HAL_UART_Receive(&UartHandle, &a_rx_ctrl[0], 1, NAK_TIMEOUT) == HAL_OK)
|
|
{
|
|
if (a_rx_ctrl[0] == ACK)
|
|
{
|
|
ack_recpt = 1;
|
|
}
|
|
else if (a_rx_ctrl[0] == CA)
|
|
{
|
|
if ((HAL_UART_Receive(&UartHandle, &a_rx_ctrl[0], 1, NAK_TIMEOUT) == HAL_OK) && (a_rx_ctrl[0] == CA))
|
|
{
|
|
HAL_Delay( 2 );
|
|
__HAL_UART_FLUSH_DRREGISTER(&UartHandle);
|
|
result = COM_ABORT;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
errors++;
|
|
}
|
|
|
|
if (errors >= MAX_ERRORS)
|
|
{
|
|
result = COM_ERROR;
|
|
}
|
|
}
|
|
|
|
/* Empty packet sent - some terminal emulators need this to close session */
|
|
if ( result == COM_OK )
|
|
{
|
|
/* Preparing an empty packet */
|
|
aPacketData[PACKET_START_INDEX] = SOH;
|
|
aPacketData[PACKET_NUMBER_INDEX] = 0;
|
|
aPacketData[PACKET_CNUMBER_INDEX] = 0xFF;
|
|
for (i = PACKET_DATA_INDEX; i < (PACKET_SIZE + PACKET_DATA_INDEX); i++)
|
|
{
|
|
aPacketData [i] = 0x00;
|
|
}
|
|
|
|
/* Send Packet */
|
|
HAL_UART_Transmit(&UartHandle, &aPacketData[PACKET_START_INDEX], PACKET_SIZE + PACKET_HEADER_SIZE, NAK_TIMEOUT);
|
|
|
|
/* Send CRC or Check Sum based on CRC16_F */
|
|
#ifdef CRC16_F
|
|
temp_crc = Cal_CRC16(&aPacketData[PACKET_DATA_INDEX], PACKET_SIZE);
|
|
Serial_PutByte(temp_crc >> 8);
|
|
Serial_PutByte(temp_crc & 0xFF);
|
|
#else /* CRC16_F */
|
|
temp_chksum = CalcChecksum (&aPacketData[PACKET_DATA_INDEX], PACKET_SIZE);
|
|
Serial_PutByte(temp_chksum);
|
|
#endif /* CRC16_F */
|
|
|
|
/* Wait for Ack and 'C' */
|
|
if (HAL_UART_Receive(&UartHandle, &a_rx_ctrl[0], 1, NAK_TIMEOUT) == HAL_OK)
|
|
{
|
|
if (a_rx_ctrl[0] == CA)
|
|
{
|
|
HAL_Delay( 2 );
|
|
__HAL_UART_FLUSH_DRREGISTER(&UartHandle);
|
|
result = COM_ABORT;
|
|
}
|
|
}
|
|
}
|
|
|
|
return result; /* file transmitted successfully */
|
|
}
|
|
|
|
/**
|
|
* @}
|
|
*/
|