add files from nrf52832 bootloader project

This commit is contained in:
hathach
2018-02-07 23:32:49 +07:00
parent ac1f0e7955
commit 9f1d9f321e
186 changed files with 83021 additions and 0 deletions

View File

@ -0,0 +1,112 @@
/* Copyright (c) 2015 Nordic Semiconductor. All Rights Reserved.
*
* The information contained herein is property of Nordic Semiconductor ASA.
* Terms and conditions of usage are described in detail in NORDIC
* SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
*
* Licensees are granted free, non-transferable use of the information. NO
* WARRANTY of ANY KIND is provided. This heading must NOT be removed from
* the file.
*
*/
#include "slip.h"
#include "nrf_error.h"
#define SLIP_END 0300 /* indicates end of packet */
#define SLIP_ESC 0333 /* indicates byte stuffing */
#define SLIP_ESC_END 0334 /* ESC ESC_END means END data byte */
#define SLIP_ESC_ESC 0335 /* ESC ESC_ESC means ESC data byte */
uint32_t slip_encode(uint8_t * p_output, uint8_t * p_input, uint32_t input_length, uint32_t output_buffer_length)
{
uint32_t input_index;
uint32_t output_index;
for (input_index = 0, output_index = 0; input_index < input_length && output_index < output_buffer_length; input_index++)
{
switch (p_input[input_index])
{
case SLIP_END:
p_output[output_index++] = SLIP_END;
p_output[output_index++] = SLIP_ESC_END;
break;
case SLIP_ESC:
p_output[output_index++] = SLIP_ESC;
p_output[output_index++] = SLIP_ESC_ESC;
break;
default:
p_output[output_index++] = p_input[input_index];
}
}
p_output[output_index++] = (uint8_t)SLIP_END;
p_output[output_index++] = (uint8_t)SLIP_END; // clarify that the packet has ended.
return output_index;
}
uint32_t slip_decoding_add_char(uint8_t c, buffer_t * p_buf, slip_state_t * current_state)
{
switch (*current_state)
{
case SLIP_DECODING:
if (c == SLIP_END)
{
*current_state = SLIP_END_RECEIVED;
}
else if (c == SLIP_ESC)
{
*current_state = SLIP_END_RECEIVED;
}
else
{
p_buf->p_buffer[p_buf->current_index++] = c;
p_buf->current_length++;
}
break;
case SLIP_ESC_RECEIVED:
if (c == SLIP_ESC_ESC)
{
p_buf->p_buffer[p_buf->current_index++] = SLIP_ESC;
p_buf->current_length++;
*current_state = SLIP_DECODING;
}
else
{
// violation of protocol
*current_state = SLIP_CLEARING_INVALID_PACKET;
return NRF_ERROR_INVALID_DATA;
}
break;
case SLIP_END_RECEIVED:
if (c == SLIP_ESC_END)
{
p_buf->p_buffer[p_buf->current_index++] = SLIP_END;
p_buf->current_length++;
*current_state = SLIP_DECODING;
}
else
{
// packet is finished
*current_state = SLIP_DECODING;
return NRF_SUCCESS;
}
break;
case SLIP_CLEARING_INVALID_PACKET:
if (c == SLIP_END)
{
*current_state = SLIP_DECODING;
p_buf->current_index = 0;
p_buf->current_length = 0;
}
break;
}
return NRF_ERROR_BUSY;
}

View File

@ -0,0 +1,66 @@
/* Copyright (c) 2015 Nordic Semiconductor. All Rights Reserved.
*
* The information contained herein is property of Nordic Semiconductor ASA.
* Terms and conditions of usage are described in detail in NORDIC
* SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
*
* Licensees are granted free, non-transferable use of the information. NO
* WARRANTY of ANY KIND is provided. This heading must NOT be removed from
* the file.
*
*/
#ifndef SLIP_H__
#define SLIP_H__
#include <stdint.h>
#include "app_fifo.h"
/** @file
*
* @defgroup slip SLIP encoding decoding
* @{
* @ingroup app_common
*
* @brief This module encodes and decodes slip packages (RFC1055).
*
* @details The standard is described in https://tools.ietf.org/html/rfc1055
*/
typedef enum {
SLIP_DECODING,
SLIP_END_RECEIVED,
SLIP_ESC_RECEIVED,
SLIP_CLEARING_INVALID_PACKET,
} slip_state_t;
typedef struct {
uint8_t * p_buffer;
uint32_t current_index;
uint32_t current_length;
uint32_t len;
} buffer_t;
/**@brief Encodes a slip packet.
*
* @details Note that the encoded output data will be longer than the input data.
*
* @retval The length of the encoded packet. If it is smaller than the input length, an error has occurred.
*/
uint32_t slip_encode(uint8_t * p_output, uint8_t * p_input, uint32_t input_length, uint32_t output_buffer_length);
/**@brief Decodes a slip packet.
*
* @details When decoding a slip packet, a state must be preserved. Initial state must be set to SLIP_DECODING.
*
* @retval NRF_SUCCESS when a packet is parsed. The length of the packet can be read out from p_buf->current_index
* @retval NRF_ERROR_BUSY when packet is not finished parsing
* @retval NRF_ERROR_INVALID_DATA when packet is encoded wrong.
This moves the decoding to SLIP_CLEARING_INVALID_PACKET, and will stay in this state until SLIP_END is encountered.
*/
uint32_t slip_decoding_add_char(uint8_t c, buffer_t * p_buf, slip_state_t * current_state);
#endif // SLIP_H__
/** @} */