"""
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HEX格式文件以行为单位记录数据，每行都由任意数量的十六进制数组成。
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每一行的格式如下：
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：本行数据长度(2byte)+数据起始地址(4byte)+数据类型(2byte)+数据内容(N byte)+校验(1byte)
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"""
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from aenum import IntEnum
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import binascii
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HEX_LEN_H = 1
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HEX_LEN_L = 2
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HEX_ADDR_HH = 3
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HEX_ADDR_HL = 4
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HEX_ADDR_LH = 5
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HEX_ADDR_LL = 6
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HEX_DATA_TYPE_H = 7
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HEX_DATA_TYPE_L = 8
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HEX_DATA_START = 9
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HexTable = {
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48: 0,
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49: 1,
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50: 2,
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51: 3,
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52: 4,
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53: 5,
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54: 6,
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55: 7,
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56: 8,
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57: 9,
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65: 10,
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66: 11,
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67: 12,
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68: 13,
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69: 14,
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70: 15
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}
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class HexDataType(IntEnum):
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DataRecord = 0
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FileEnd = 1
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ExtentionAddr = 2
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StartSectionAddr = 3
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ExtentionLinearAddr = 4
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StartLinearSectionAddr = 3
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class Hex_read(object):
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def __init__(self):
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self.start_addr = 0
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self.len = 0
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self.data = b''
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def Open_file(self, file):
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self.file = file
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self.start_addr = 0
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self.len = 0
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self.data = b''
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with open(file, 'rb') as fd:
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for aLineData in fd:
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if aLineData[0] == 0x3A: # 0x3A == ":"
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# print(aLineData)
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DataLen = HexTable[aLineData[HEX_LEN_H]] * 16 + HexTable[
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aLineData[HEX_LEN_L]]
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Data_Addr = HexTable[
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aLineData[HEX_ADDR_HH]] * 16 * 16 * 16 + HexTable[
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aLineData[HEX_ADDR_HL]] * 16 * 16 + HexTable[
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aLineData[HEX_ADDR_LH]] * 16 + HexTable[
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aLineData[HEX_ADDR_LL]]
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Data_Type = HexTable[
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aLineData[HEX_DATA_TYPE_H]] * 16 + HexTable[
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aLineData[HEX_DATA_TYPE_L]]
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if Data_Type == HexDataType.FileEnd:
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break
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if Data_Type == HexDataType.ExtentionLinearAddr:
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self.start_addr = HexTable[aLineData[
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HEX_DATA_START]] << 28 | HexTable[aLineData[
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HEX_DATA_START + 1]] << 20 | HexTable[
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aLineData[HEX_DATA_START +
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2]] << 12 | HexTable[aLineData[
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HEX_DATA_START + 3]] << 4
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# print(self.start_addr)
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if Data_Type == HexDataType.DataRecord:
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if self.len == 0:
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self.start_addr += Data_Addr
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self.len += DataLen
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self.data += aLineData[HEX_DATA_START:HEX_DATA_START +
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DataLen * 2]
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fd.close()
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self.data = binascii.a2b_hex(self.data)
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# print(len(self.data))
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# print(self.start_addr)
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# print(bin_file[0:20])
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