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annotate src/external_flash.asm @ 573:cf4395595d9b

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docu update
author heinrichsweikamp
date Tue, 13 Feb 2018 14:55:43 +0100
parents 9c54849b8d3b
children b455b31ce022
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1 ;=============================================================================
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2 ;
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3 ; File external_flash.asm
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4 ;
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5 ; External flash
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6 ;
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7 ; Copyright (c) 2011, JD Gascuel, HeinrichsWeikamp, all right reserved.
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8 ;=============================================================================
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9 ; HISTORY
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10 ; 2011-08-12 : [mH] creation
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11
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12 #include "hwos.inc"
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13 #include "wait.inc"
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14
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15 basic CODE
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16 ;=============================================================================
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17
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18 global incf_ext_flash_address_p1
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19 incf_ext_flash_address_p1: ; Increase by one
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20 movlw .1
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21
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22 global incf_ext_flash_address0
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23 incf_ext_flash_address0:
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24 addwf ext_flash_address+0,F ; increase address
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25 movlw d'0'
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26 addwfc ext_flash_address+1,F
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27 addwfc ext_flash_address+2,F
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28
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29 movlw 0x40
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30 cpfseq ext_flash_address+2 ; at address 40FFFF?
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31 return ; No, return
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05f2100d2eb8 logbook
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32 ; clrf ext_flash_address+0
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33 ; clrf ext_flash_address+1
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34 clrf ext_flash_address+2 ; Yes, rollover to 0x000000
0
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35 return
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36
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37 global incf_ext_flash_address0_p1_0x20
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38 incf_ext_flash_address0_p1_0x20: ; Increase by one
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39 movlw .1
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40
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41 global incf_ext_flash_address0_0x20
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42 incf_ext_flash_address0_0x20: ; with roll-over at 0x200000 to 0x000000
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43 addwf ext_flash_address+0,F ; increase address
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44 movlw d'0'
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45 addwfc ext_flash_address+1,F
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46 addwfc ext_flash_address+2,F
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47
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48 movlw 0x20
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49 cpfseq ext_flash_address+2 ; at address 0x200000?
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50 return ; No, return
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51 ; clrf ext_flash_address+0
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52 ; clrf ext_flash_address+1
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53 clrf ext_flash_address+2 ; Yes, rollover to 0x000000
0
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54 return
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55
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56 global decf_ext_flash_address0
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57 decf_ext_flash_address0:
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58 subwf ext_flash_address+0,F ; decrease address: do a 16-8bits substract.
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59 movlw d'0'
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60 subwfb ext_flash_address+1,F
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61 movlw d'0'
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62 subwfb ext_flash_address+2,F
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63
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64 btfss ext_flash_address+2,7 ; Rollover to 0xFFFFFF?
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65 return ; No, return
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66 clrf ext_flash_address+2 ; Set to 0x00FFFFF
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67 setf ext_flash_address+1
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68 setf ext_flash_address+0
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69 return
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70
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71 global ext_flash_byte_read_plus ; Return data read in WREG and SSP2BUF and
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72 ext_flash_byte_read_plus: ; increase address after read
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73 rcall ext_flash_byte_read
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74 movwf temp1 ; store received data
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75 bra incf_ext_flash_address_p1 ; +1 and return
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76
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77 global ext_flash_byte_read_plus_0x20; Return data read in WREG and SSP2BUF and
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78 ext_flash_byte_read_plus_0x20: ; increase address after read with banking at 0x200000
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79 rcall ext_flash_byte_read
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80 movwf temp1 ; store received data
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81 bra incf_ext_flash_address0_p1_0x20 ;+1 and return
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82
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83
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84 global ext_flash_byte_read ; Return data read in WREG
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85 ext_flash_byte_read:
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86 movlw 0x03 ; Read command
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87 rcall write_spi
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88 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI
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89 rcall write_spi ; Dummy write to read data into WREG
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90 bsf flash_ncs ; CS=1
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91 movwf temp1
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92 return ; Return data read in WREG and temp1
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93
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94 ext_flash_write_address: ; Write 24bit address ext_flash_address:3 via SPI
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95 movf ext_flash_address+2,W ; 24Bit Address
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96 rcall write_spi
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97 movf ext_flash_address+1,W
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98 rcall write_spi
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99 movf ext_flash_address+0,W
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100 bra write_spi ; And return....
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101
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102 global ext_flash_read_block_start ; Return data read in WREG
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103 ext_flash_read_block_start:
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104 movlw 0x03 ; Read command
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105 rcall write_spi
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106 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI
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107 rcall write_spi ; Dummy write to read data into WREG
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108 return ; Return data read in WREG
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109
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110 global ext_flash_read_block ; Return data read in WREG
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111 ext_flash_read_block:
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112 rcall incf_ext_flash_address_p1 ; Increase address +1
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113 bra write_spi1 ; Dummy write to read data into WREG and return
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114
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115 global ext_flash_read_block_stop ; Return data read in WREG
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116 ext_flash_read_block_stop:
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117 bsf flash_ncs ; CS=1
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118 return ; NO data in WREG
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119
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120 global write_byte_ext_flash_plus_header
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121 write_byte_ext_flash_plus_header: ; Write from WREG and increase address after write
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122 movwf temp1 ; store data
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123 ; test if write is done at first byte of 4kB block
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124 ; if yes -> delete 4kB block first
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125 tstfsz ext_flash_address+0 ; at 0x00?
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126 bra write_byte_ext_flash_plus_h1 ; No, normal Write
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127
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128 movf ext_flash_address+1,W
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129 andlw 0x0F ; Mask lower nibble
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130 tstfsz WREG ; at 0x.0?
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131 bra write_byte_ext_flash_plus_h1; No, normal Write
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132
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133 ; At beginning of 4kB block -> rease first!
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134 rcall ext_flash_erase4kB ; Erases 4kB sector @ext_flash_address:3
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135 write_byte_ext_flash_plus_h1:
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136 movf temp1,W
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137 rcall ext_flash_byte_write ; Write the byte
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138 bra incf_ext_flash_address_p1 ; +1 and return
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139
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62c7af4795b0 bugfix wrong profile length in header
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140 global write_byte_ext_flash_plus_nocnt ; No increase of ext_flash_dive_counter:3
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141 write_byte_ext_flash_plus_nocnt:
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142 movwf temp1 ; store data
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143 bra write_byte_ext_flash_plus2
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144
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dfac47ac2e1d BUGFIX: There was a 1:4096 chance that a portion of a dive was not stored correctly resulting in download issues
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145 global write_byte_ext_flash_plus_nodel ; Does NOT delete 4kB Page when required
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146 write_byte_ext_flash_plus_nodel: ; Write from WREG and increase address after write with banking at 0x200000
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147 movwf temp1 ; store data
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148 bra write_byte_ext_flash_plus1 ; Ignore possible begin of 4kB page, there have been written 0xFF already
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149
0
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150 global write_byte_ext_flash_plus ; Write from WREG and increase address after write with banking at 0x200000
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151 write_byte_ext_flash_plus:
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152 movwf temp1 ; store data
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153
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154 ; First, increase dive length counter
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155 incf ext_flash_dive_counter+0,F
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156 movlw .0
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157 addwfc ext_flash_dive_counter+1,F
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158 addwfc ext_flash_dive_counter+2,F ; 24bit++
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159
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160 write_byte_ext_flash_plus2:
0
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161 ; Now test if write is done at first byte of 4kB block
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162 ; if yes -> delete 4kB block first
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163 tstfsz ext_flash_address+0 ; at 0x00?
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164 bra write_byte_ext_flash_plus1 ; No, normal Write
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165
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166 movf ext_flash_address+1,W
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167 andlw 0x0F ; Mask lower nibble
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168 tstfsz WREG ; at 0x.0?
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169 bra write_byte_ext_flash_plus1 ; No, normal Write
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170
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171 ; At beginning of 4kB block -> erase first!
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172 rcall ext_flash_erase4kB ; Erases 4kB sector @ext_flash_address:3
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173 write_byte_ext_flash_plus1:
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174 movf temp1,W
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175 rcall ext_flash_byte_write ; Write the byte
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176 bra incf_ext_flash_address0_p1_0x20 ; +1 and roll over at 0x200000 to 0x000000 and return
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177
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178 global ext_flash_byte_write ; Write from WREG
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179 ext_flash_byte_write:
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180 movwf temp1 ; store data byte
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181 bsf flash_ncs ; CS=1
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182 movlw 0x06 ; WREN command
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183 rcall write_spi
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184 bsf flash_ncs ; CS=1
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185 movlw 0x02 ; Write (PP, Page-Program) command
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186 rcall write_spi
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789230298511 fix handling for new flash memory chip
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187 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI
0
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188 movf temp1,W ; load data byte
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189 rcall write_spi ; write one byte of data!
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190 bra ext_flash_wait_write ; And return...
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191
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192 global ext_flash_byte_write_comms ; without wait, ~86us fixed delay due to 115200 Bauds
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193 ext_flash_byte_write_comms:
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194 movwf temp1 ; store data byte
0
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195 bsf flash_ncs ; CS=1
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196 movlw 0x06 ; WREN command
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197 rcall write_spi
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198 bsf flash_ncs ; CS=1
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199 movlw 0x02 ; Write (PP, Page-Program) command
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200 rcall write_spi
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201 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI
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202 movf temp1,W ; load data byte
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203 rcall write_spi ; write one byte of data!
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204 bsf flash_ncs ; CS=1
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205 return
0
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206
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207 global ext_flash_disable_protection ; Disable write protection
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208 ext_flash_disable_protection:
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209 ; unlock old memory
0
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210 bsf flash_ncs ; CS=1
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211 movlw 0x50 ; EWSR command
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212 rcall write_spi
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213 bsf flash_ncs ; CS=1
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214
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215 movlw 0x01 ; WRSR command
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216 rcall write_spi
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217 movlw b'00000000' ; New status
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218 rcall write_spi
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219 bsf flash_ncs ; CS=1
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220
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221 ; unlock new memory
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222 movlw 0x06 ; WREN command
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223 rcall write_spi
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224 bsf flash_ncs ; CS=1
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225 movlw 0x98 ; ULBPR command
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226 rcall write_spi
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227 bsf flash_ncs ; CS=1
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228
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229 movlw 0x06 ; WREN command
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230 rcall write_spi
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231 bsf flash_ncs ; CS=1
420
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232 movlw 0x42 ; WBPR command
414
35bdfd89323c support for new flash memory
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233 rcall write_spi
420
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234 movlw .18
423
ccaaac45b61a _another_ timing fix for firmware updates (2.07 was not published yet anyway)
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235 movwf temp2
420
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236 ext_flash_disable_protection2:
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237 movlw 0x00
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238 rcall write_spi
423
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239 decfsz temp2,F ; 18 bytes with 0x00
420
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240 bra ext_flash_disable_protection2
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241 bsf flash_ncs ; CS=1
0
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242 return
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243
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244 global ext_flash_enable_protection
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245 ext_flash_enable_protection:
414
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246 ; lock old memory
0
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247 bsf flash_ncs ; CS=1
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248 movlw 0x50 ; EWSR command
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249 rcall write_spi
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250 bsf flash_ncs ; CS=1
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251
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252 movlw 0x01 ; WRSR command
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253 rcall write_spi
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254 movlw b'00011100' ; New status (Write protect on)
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255 rcall write_spi
423
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256 bsf flash_ncs ; CS=1
414
35bdfd89323c support for new flash memory
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257
35bdfd89323c support for new flash memory
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258 ; lock new memory
423
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259 ; movlw 0x06 ; WREN command
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260 ; rcall write_spi
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261 ; bsf flash_ncs ; CS=1
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262 ; movlw 0x8D ; LBPR command
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263 ; rcall write_spi
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264 ; bsf flash_ncs ; CS=1
414
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265 movlw 0x06 ; WREN command
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266 rcall write_spi
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267 bsf flash_ncs ; CS=1
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268 movlw 0x42 ; WBPR command
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269 rcall write_spi
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270 movlw .18
423
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271 movwf temp2
414
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272 ext_flash_enable_protection2:
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273 movlw 0xFF
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274 rcall write_spi
423
ccaaac45b61a _another_ timing fix for firmware updates (2.07 was not published yet anyway)
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275 decfsz temp2,F ; 18 bytes with 0xFF
414
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276 bra ext_flash_enable_protection2
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277 bsf flash_ncs ; CS=1
0
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278 return
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279
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280
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281 global ext_flash_erase4kB ; Erases 4kB sector
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282 ext_flash_erase4kB:
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283 bsf flash_ncs ; CS=1
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284 movlw 0x06 ; WREN command
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285 rcall write_spi
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286 bsf flash_ncs ; CS=1
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287 movlw 0x20 ; Sector erase command
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288 rcall write_spi
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289 rcall ext_flash_write_address ; Write 24bit address ext_flash_address:3 via SPI
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290 ; bra ext_flash_wait_write ; Wait for write... and return
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291 ext_flash_wait_write:
423
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292 bsf flash_ncs ; CS=1
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293 ; WAITMS d'1' ; TBE/TSE=25ms...
0
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294 movlw 0x05 ; RDSR command
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295 rcall write_spi ; Read status
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296 rcall write_spi ; Read status into WREG
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297 bsf flash_ncs ; CS=1
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298 btfsc SSP2BUF,0 ; Write operation in process?
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299 bra ext_flash_wait_write ; Yes, wait more..
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300 return
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301
414
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302 global ext_flash_erase_logbook ; erases logbook memory (000000h -> 2FFFFFh -> 3MByte -> 3145728 Bytes)
0
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303 ext_flash_erase_logbook:
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304 bsf flash_ncs ; CS=1
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305 clrf ext_flash_address+0
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306 clrf ext_flash_address+1
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307 clrf ext_flash_address+2
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308
414
35bdfd89323c support for new flash memory
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309 setf temp1 ; 256*12kB=3145728 Bytes
0
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310 ext_flash_erase_logbook_loop:
414
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311 rcall ext_flash_erase4kB ; 4kB
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diff changeset
312 rcall ext_flash_add_4kB ; Increase ext_flash_address:3 by 4kB
35bdfd89323c support for new flash memory
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diff changeset
313 rcall ext_flash_erase4kB ; 4kB
35bdfd89323c support for new flash memory
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diff changeset
314 rcall ext_flash_add_4kB ; Increase ext_flash_address:3 by 4kB
35bdfd89323c support for new flash memory
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diff changeset
315 rcall ext_flash_erase4kB ; 4kB
35bdfd89323c support for new flash memory
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diff changeset
316 rcall ext_flash_add_4kB ; Increase ext_flash_address:3 by 4kB
0
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317 decfsz temp1,F
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318 bra ext_flash_erase_logbook_loop
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319 return
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320
414
35bdfd89323c support for new flash memory
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diff changeset
321 ext_flash_add_4kB:
35bdfd89323c support for new flash memory
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diff changeset
322 movlw 0x10
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323 addwf ext_flash_address+1,F
35bdfd89323c support for new flash memory
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parents: 281
diff changeset
324 movlw d'0'
35bdfd89323c support for new flash memory
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diff changeset
325 addwfc ext_flash_address+2,F
35bdfd89323c support for new flash memory
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parents: 281
diff changeset
326 return
35bdfd89323c support for new flash memory
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diff changeset
327
0
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328
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329 write_spi: ; With data in WREG...
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330 bcf flash_ncs ; CS
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331 global write_spi1
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332 write_spi1: ; With data in WREG...
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333 bcf SSP2STAT,WCOL ; Clear flag
heinrichsweikamp
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334 movwf SSP2BUF ; Write to buffer
heinrichsweikamp
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335 btfsc SSP2STAT,WCOL ; Was buffer full?
heinrichsweikamp
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336 bra write_spi1 ; Yes, try again
heinrichsweikamp
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337
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338 write_spi2: ; Wait for write command
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339 btfss SSP2STAT, BF ; Buffer full?
heinrichsweikamp
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340 bra write_spi2 ; No, wait.
heinrichsweikamp
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341 movf SSP2BUF,W
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342 return ; Returns RX data in WREG and SSP2BUF
heinrichsweikamp
parents:
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343
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344 END