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<a name="l00112"></a>00112 <a name="l00113"></a><a class="code" href="smbus_8c.html#bd43f4ac549de63ca6ad46bd406ea17f">00113</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="smbus_8c.html#bd43f4ac549de63ca6ad46bd406ea17f">TEST50US</a> = 0;<a name="l00114"></a><a class="code" href="smbus_8c.html#8eb5d9128fac12df31c29313df01b1ac">00114</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="smbus_8c.html#8eb5d9128fac12df31c29313df01b1ac">SMLOCK</a> = 0; <span class="comment">//prevents Master bus grab attempts WHILE BUS IS IN MASTER MODE.</span><a name="l00115"></a>00115 <a name="l00116"></a><a class="code" href="smbus_8c.html#c47af82e11278b79be8fb40152038444">00116</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="smbus_8c.html#c47af82e11278b79be8fb40152038444">TW_MTxBuf</a>[8]; <span class="comment">//Master-mode TX buffer</span><a name="l00117"></a><a class="code" href="smbus_8c.html#3543d0e9d6053dac3f9b711d440a3f93">00117</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="smbus_8c.html#3543d0e9d6053dac3f9b711d440a3f93">TW_MTxBufCnt</a> = 0; <span class="comment">//how many valid bytes are in the buffer</span><a name="l00118"></a><a class="code" href="smbus_8c.html#c8ae296e1c1a72b91325c789bbdff1a0">00118</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="smbus_8c.html#c8ae296e1c1a72b91325c789bbdff1a0">TW_MTxBufIndex</a> = 0;<a name="l00119"></a>00119 <a name="l00120"></a>00120 <span class="comment">// Note for the buffers below, these must be able to contain:</span><a name="l00121"></a>00121 <span class="comment">// Slave Address, SMBus Command, Byte Count (if Block-mode), up to 32 bytes, plus PEC.</span><a name="l00122"></a><a class="code" href="smbus_8c.html#204ea67bfcfaf14d21b4a31bc22e651e">00122</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="bootloader__smbus_8c.html#204ea67bfcfaf14d21b4a31bc22e651e">TW_TxBuf</a>[36]; <span class="comment">//must be long enough for any outbound strings</span><a name="l00123"></a><a class="code" href="smbus_8c.html#1b712ae6a56048cf3cce7c93ed2ed6c1">00123</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="bootloader__smbus_8c.html#1b712ae6a56048cf3cce7c93ed2ed6c1">TW_TxBufCnt</a> = 0; <span class="comment">//how many valid bytes are in the buffer</span><a name="l00124"></a><a class="code" href="smbus_8c.html#ce8ce6c26dcb95748ab5026ce7157bf7">00124</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="bootloader__smbus_8c.html#ce8ce6c26dcb95748ab5026ce7157bf7">TW_TxBufIndex</a> = 0;<a name="l00125"></a>00125 <a name="l00126"></a><a class="code" href="smbus_8c.html#7047349064b5667474f40f60b60bfa65">00126</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="bootloader__smbus_8c.html#49479463989e8f9b15cb6aa66d0667e7">TW_RxBuf</a>[10]; <span class="comment">//In Application mode (non-ISP mode), only receive WORD commands.</span><a name="l00127"></a><a class="code" href="smbus_8c.html#70d458264aa3b695f8108f7ec1b9e493">00127</a> <span class="keywordtype">signed</span> <span class="keywordtype">char</span> <a class="code" href="bootloader__smbus_8c.html#d200369e2af9e1b8a915e2e856190208">TW_RxBufCnt</a> = 0;<a name="l00128"></a><a class="code" href="smbus_8c.html#98071e48f8969fdd79e1fa2337d0b6dd">00128</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="bootloader__smbus_8c.html#98071e48f8969fdd79e1fa2337d0b6dd">TW_RxBufIndex</a> = 0;<a name="l00129"></a>00129 <a name="l00130"></a>00130 <a name="l00131"></a>00131 <span class="comment">//This byte contains flags from the TWI ISR to tell the Foreground code what to do.</span><a name="l00132"></a>00132 <span class="comment">//If this byte is ever non-zero, the foreground code will act on its contents.</span><a name="l00133"></a>00133 <span class="comment">//Although it is written by both the ISR and the Foreground code, it does not</span><a name="l00134"></a>00134 <span class="comment">// need to be declared VOLATILE because the SMBus is halted until the foreground</span><a name="l00135"></a>00135 <span class="comment">// code finishes processing the associated command and has cleared this flag byte.</span><a name="l00136"></a><a class="code" href="smbus_8c.html#72f0b2eb64dd62ffa6bb85ef96947543">00136</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="bootloader__smbus_8c.html#72f0b2eb64dd62ffa6bb85ef96947543">TWI_CmdFlags</a>;<a name="l00137"></a><a class="code" href="smbus_8c.html#75ae04e7aaa973e59f86209a3e8f7d3c">00137</a> <span class="preprocessor"> #define SMB_GenBusTimeout 1 </span><span class="comment">/* Tell Foreground to generate a bus timeout, as we saw an error! */</span><a name="l00138"></a><a class="code" href="smbus_8c.html#1fef3300524ef987fa146cc892813b20">00138</a> <span class="preprocessor"> #define SMB_SetUpReply 2 </span><span class="comment">/* Have Foreground set up TW_TxBuf[]. */</span><a name="l00139"></a><a class="code" href="smbus_8c.html#07b00aac11ba389d5b53e2f9d54bd0bd">00139</a> <span class="preprocessor"> #define SMB_GotCmdData 4 </span><span class="comment">/* Have Foreground interpret the complete received command. */</span><a name="l00140"></a>00140 <a name="l00141"></a><a class="code" href="smbus_8c.html#50d57ab7cb03b10099411f378522dadd">00141</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="smbus_8c.html#50d57ab7cb03b10099411f378522dadd">CurrentCmd</a> = 0xFF;<a name="l00142"></a><a class="code" href="smbus_8c.html#fd9b3e99365b45af6cf763b2dda41546">00142</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="bootloader__smbus_8c.html#fd9b3e99365b45af6cf763b2dda41546">UsePEC</a> = 0; <span class="comment">//PEC usage is disabled by default.</span><a name="l00143"></a>00143 <a name="l00144"></a>00144 <a name="l00145"></a>00145 <a name="l00146"></a>00146 <a name="l00147"></a>00147 <span class="comment">/* *************************************************************************</span><a name="l00148"></a>00148 <span class="comment"> *</span><a name="l00149"></a>00149 <span class="comment"> * SMBus Initialization routine</span><a name="l00150"></a>00150 <span class="comment"> *</span><a name="l00151"></a>00151 <span class="comment"> ************************************************************************* */</span><a name="l00152"></a>00152 <a name="l00153"></a><a class="code" href="smbus_8h.html#581562a5e159d4fb25896865d023a3a0">00153</a> <span class="keywordtype">void</span> <a class="code" href="smbus_8c.html#581562a5e159d4fb25896865d023a3a0">InitSMBus</a>(<span class="keywordtype">void</span>)<a name="l00154"></a>00154 {<a name="l00155"></a>00155 <a class="code" href="bootloader__smbus_8c.html#a43740bb86658af2f20234cc35e87e1c">SMB_RestoreBus</a>();<a name="l00156"></a>00156 TWBCSR = (1<<TWBCIF) | (1<<TWBCIE) | (1<<TWBDT1) | (1<<TWBDT0) | (0<<TWBCIP);<a name="l00157"></a>00157 }<a name="l00158"></a>00158 <a name="l00159"></a>00159 <a name="l00160"></a>00160 <a name="l00161"></a>00161 <a name="l00162"></a>00162 <span class="comment">/* *************************************************************************</span><a name="l00163"></a>00163 <span class="comment"> *</span><a name="l00164"></a>00164 <span class="comment"> * SMBus Wakeup Interrupt</span><a name="l00165"></a>00165 <span class="comment"> *</span><a name="l00166"></a>00166 <span class="comment"> ************************************************************************* */</span><a name="l00167"></a>00167 <a name="l00168"></a>00168 <a name="l00169"></a>00169 <span class="comment">//This wakes up a battery from sleep mode into the "On" state, per sbdat110, 4.4.2</span><a name="l00170"></a>00170 <a name="l00171"></a>00171 <span class="preprocessor">#pragma vector = TWI_BUS_CD_vect</span><a name="l00172"></a><a class="code" href="smbus_8c.html#6ad83522570a9dfb8df36852769b5393">00172</a> <span class="preprocessor"></span>__interrupt <span class="keywordtype">void</span> <a class="code" href="smbus_8c.html#6ad83522570a9dfb8df36852769b5393">TWICD_ISR</a>(<span class="keywordtype">void</span>)<a name="l00173"></a>00173 {<a name="l00174"></a>00174 <span class="comment">//clear bits per sbdat110, 4.4.2</span><a name="l00175"></a>00175 <a class="code" href="bootldr_8h.html#c7f9993307a3c3559f56d0353613de62">SMBvariables</a>[<a class="code" href="bootldr_8h.html#9b9498cc5b1927e9d63da15b33c851a4">SMBV_BattMode</a>][<a class="code" href="bootldr_8h.html#c1d4ce681b76fba522c9e4b1c9b08e43">hibyte</a>] &= ~(0xE3); <a name="l00176"></a>00176 <a name="l00177"></a>00177 <span class="keywordflow">if</span>(TWBCSR & (1<<TWBCIP)) <span class="comment">//this int was caused by bus DISCONNECT event.</span><a name="l00178"></a>00178 {<a name="l00179"></a>00179 TWBCSR &= ~(1<<TWBCIP);<a name="l00180"></a>00180 <a class="code" href="pwrmgmt_8c.html#b26cf61a05981ff2ea27fd2ae0910ff3">ChangePowerMode</a>(<a class="code" href="pwrmgmt_8h.html#e8ab48be94d8b769f1cdd9cd1b94ce43">POWERMODE_IDLE</a>,0);<a name="l00181"></a>00181 }<a name="l00182"></a>00182 <span class="keywordflow">else</span> <span class="comment">//this int occurred due to a bus CONNECT event.</span><a name="l00183"></a>00183 {<a name="l00184"></a>00184 TWBCSR |= (1<<TWBCIP);<a name="l00185"></a>00185 <a class="code" href="pwrmgmt_8c.html#b26cf61a05981ff2ea27fd2ae0910ff3">ChangePowerMode</a>(<a class="code" href="pwrmgmt_8h.html#92d270a5b5433af638d3c05ce155f15e">POWERMODE_ACTIVE</a>,0);<a name="l00186"></a>00186 }<a name="l00187"></a>00187 }<a name="l00188"></a>00188 <a name="l00189"></a>00189 <a name="l00190"></a>00190 <a name="l00191"></a>00191 <a name="l00192"></a>00192 <span class="comment">/* *************************************************************************</span><a name="l00193"></a>00193 <span class="comment"> *</span><a name="l00194"></a>00194 <span class="comment"> * SMBus PA6 Pin Change Interrupt (needed for Master Mode)</span><a name="l00195"></a>00195 <span class="comment"> *</span><a name="l00196"></a>00196 <span class="comment"> ************************************************************************* */</span><a name="l00197"></a>00197 <a name="l00198"></a>00198 <a name="l00199"></a>00199 <span class="preprocessor">#pragma vector = PCINT0_vect</span><a name="l00200"></a><a class="code" href="smbus_8c.html#24104e102795fa8d1f66e7858f436d56">00200</a> <span class="preprocessor"></span>__interrupt <span class="keywordtype">void</span> <a class="code" href="smbus_8c.html#24104e102795fa8d1f66e7858f436d56">PCINT0_ISR</a>(<span class="keywordtype">void</span>)<a name="l00201"></a>00201 {<a name="l00202"></a>00202 <a class="code" href="smbus_8c.html#bd43f4ac549de63ca6ad46bd406ea17f">TEST50US</a> = 0; <span class="comment">//flag to SMBUS.C that bus activity happened</span><a name="l00203"></a>00203 }<a name="l00204"></a>00204 <a name="l00205"></a>00205 <a name="l00206"></a>00206 <a name="l00207"></a>00207 <a name="l00208"></a>00208 <span class="preprocessor">#pragma vector = PCINT1_vect</span><a name="l00209"></a><a class="code" href="smbus_8c.html#66906ca5e2d544ae9c5b3ba984b8f90f">00209</a> <span class="preprocessor"></span>__interrupt <span class="keywordtype">void</span> <a class="code" href="smbus_8c.html#66906ca5e2d544ae9c5b3ba984b8f90f">PCINT1_ISR</a>(<span class="keywordtype">void</span>)<a name="l00210"></a>00210 {<a name="l00211"></a>00211 ; <span class="comment">//unused</span>⌨️ 快捷键说明
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