at91rm9200_ssc.html

AT91RM9200 SPI 键盘测试程序

<tr><td align="CENTER">5</td><td align="CENTER"><a name="SSC_FSOS_TOGGLE"></a><b>SSC_FSOS_TOGGLE</b><font size="-1"><br><a href="AT91RM9200_h.html#AT91C_SSC_FSOS_TOGGLE">AT91C_SSC_FSOS_TOGGLE</a></font></td><td><br>Selected Receive/Transmit Frame Sync Signal: Toggling at each start of data transfer</td></tr>
</null></table></font>
</td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC">24</td><td align="CENTER"><a name="SSC_FSEDGE"></a><b>SSC_FSEDGE</b><font size="-2"><br><a href="AT91RM9200_h.html#AT91C_SSC_FSEDGE">AT91C_SSC_FSEDGE</a></font></td><td><b>Frame Sync Edge Detection</b><br>Determines which edge on Frame Sync will generate the interrupt RXSYN/TXSYN in the SSC Status Register.<br>0: Positive Edge Detection<br>1: Negative Edge Detection</td></tr>
</null></table>
<a name="SSC_TCMR"></a><h4><a href="#SSC">SSC</a>: <i><a href="AT91RM9200_h.html#AT91_REG">AT91_REG</a></i> SSC_TCMR  <i>Transmit Clock Mode Register</i></h4><ul><null><font size="-2"><li><b>SSC2</b> <i><a href="AT91RM9200_h.html#AT91C_SSC2_TCMR">AT91C_SSC2_TCMR</a></i> 0xFFFD8018</font><font size="-2"><li><b>SSC1</b> <i><a href="AT91RM9200_h.html#AT91C_SSC1_TCMR">AT91C_SSC1_TCMR</a></i> 0xFFFD4018</font><font size="-2"><li><b>SSC0</b> <i><a href="AT91RM9200_h.html#AT91C_SSC0_TCMR">AT91C_SSC0_TCMR</a></i> 0xFFFD0018</font></null></ul><table border=1 cellpadding=0 cellspacing=0 width="100%"><null><th bgcolor="#FFFFCC"><b>Offset</b></th><th bgcolor="#FFFFCC"><b>Name</b></th><th bgcolor="#FFFFCC"><b>Description</b></th><tr><td align="CENTER" bgcolor="#FFFFCC">1..0</td><td align="CENTER"><a name="SSC_CKS"></a><b>SSC_CKS</b><font size="-2"><br><a href="AT91RM9200_h.html#AT91C_SSC_CKS">AT91C_SSC_CKS</a></font></td><td><b>Receive/Transmit Clock Selection</b><font size="-1"><table bgcolor="#E3F2FF" border=1 cellpadding=0 cellspacing=0 width="100%"><null><th><b>Value</b></th><th><b>Label</b></th><th><b>Description</b></th><tr><td align="CENTER">0</td><td align="CENTER"><a name="SSC_CKS_DIV"></a><b>SSC_CKS_DIV</b><font size="-1"><br><a href="AT91RM9200_h.html#AT91C_SSC_CKS_DIV">AT91C_SSC_CKS_DIV</a></font></td><td><br>Divided Clock</td></tr>
<tr><td align="CENTER">1</td><td align="CENTER"><a name="SSC_CKS_TK"></a><b>SSC_CKS_TK</b><font size="-1"><br><a href="AT91RM9200_h.html#AT91C_SSC_CKS_TK">AT91C_SSC_CKS_TK</a></font></td><td><br>TK Clock signal</td></tr>
<tr><td align="CENTER">2</td><td align="CENTER"><a name="SSC_CKS_RK"></a><b>SSC_CKS_RK</b><font size="-1"><br><a href="AT91RM9200_h.html#AT91C_SSC_CKS_RK">AT91C_SSC_CKS_RK</a></font></td><td><br>RK pin</td></tr>
</null></table></font>
</td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC">4..2</td><td align="CENTER"><a name="SSC_CKO"></a><b>SSC_CKO</b><font size="-2"><br><a href="AT91RM9200_h.html#AT91C_SSC_CKO">AT91C_SSC_CKO</a></font></td><td><b>Receive/Transmit Clock Output Mode Selection</b><font size="-1"><table bgcolor="#E3F2FF" border=1 cellpadding=0 cellspacing=0 width="100%"><null><th><b>Value</b></th><th><b>Label</b></th><th><b>Description</b></th><tr><td align="CENTER">0</td><td align="CENTER"><a name="SSC_CKO_NONE"></a><b>SSC_CKO_NONE</b><font size="-1"><br><a href="AT91RM9200_h.html#AT91C_SSC_CKO_NONE">AT91C_SSC_CKO_NONE</a></font></td><td><br>Receive/Transmit Clock Output Mode: None RK pin: Input-only</td></tr>
<tr><td align="CENTER">1</td><td align="CENTER"><a name="SSC_CKO_CONTINOUS"></a><b>SSC_CKO_CONTINOUS</b><font size="-1"><br><a href="AT91RM9200_h.html#AT91C_SSC_CKO_CONTINOUS">AT91C_SSC_CKO_CONTINOUS</a></font></td><td><br>Continuous Receive/Transmit Clock RK pin: Output</td></tr>
<tr><td align="CENTER">2</td><td align="CENTER"><a name="SSC_CKO_DATA_TX"></a><b>SSC_CKO_DATA_TX</b><font size="-1"><br><a href="AT91RM9200_h.html#AT91C_SSC_CKO_DATA_TX">AT91C_SSC_CKO_DATA_TX</a></font></td><td><br>Receive/Transmit Clock only during data transfers RK pin: Output</td></tr>
</null></table></font>
</td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC">5</td><td align="CENTER"><a name="SSC_CKI"></a><b>SSC_CKI</b><font size="-2"><br><a href="AT91RM9200_h.html#AT91C_SSC_CKI">AT91C_SSC_CKI</a></font></td><td><b>Receive/Transmit Clock Inversion</b><br>0: The data and the Frame Sync signal are sampled on Receive Clock falling edge.<br>1: The data and the Frame Sync signal are shifted out on Receive Clock rising edge.<br>CKI affects only the Receive Clock and not the output clock signal.</td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC">7..6</td><td align="CENTER"><a name="SSC_CKG"></a><b>SSC_CKG</b><font size="-2"><br><a href="AT91RM9200_h.html#AT91C_SSC_CKG">AT91C_SSC_CKG</a></font></td><td><b>Receive/Transmit Clock Gating Selection</b><font size="-1"><table bgcolor="#E3F2FF" border=1 cellpadding=0 cellspacing=0 width="100%"><null><th><b>Value</b></th><th><b>Label</b></th><th><b>Description</b></th><tr><td align="CENTER">0</td><td align="CENTER"><a name="SSC_CKG_NONE"></a><b>SSC_CKG_NONE</b><font size="-1"><br><a href="AT91RM9200_h.html#AT91C_SSC_CKG_NONE">AT91C_SSC_CKG_NONE</a></font></td><td><br>Receive/Transmit Clock Gating: None, continuous clock</td></tr>
<tr><td align="CENTER">1</td><td align="CENTER"><a name="SSC_CKG_LOW"></a><b>SSC_CKG_LOW</b><font size="-1"><br><a href="AT91RM9200_h.html#AT91C_SSC_CKG_LOW">AT91C_SSC_CKG_LOW</a></font></td><td><br>Receive/Transmit Clock enabled only if RF Low</td></tr>
<tr><td align="CENTER">2</td><td align="CENTER"><a name="SSC_CKG_HIGH"></a><b>SSC_CKG_HIGH</b><font size="-1"><br><a href="AT91RM9200_h.html#AT91C_SSC_CKG_HIGH">AT91C_SSC_CKG_HIGH</a></font></td><td><br>Receive/Transmit Clock enabled only if RF High</td></tr>
</null></table></font>
</td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC">11..8</td><td align="CENTER"><a name="SSC_START"></a><b>SSC_START</b><font size="-2"><br><a href="AT91RM9200_h.html#AT91C_SSC_START">AT91C_SSC_START</a></font></td><td><b>Receive/Transmit Start Selection</b><font size="-1"><table bgcolor="#E3F2FF" border=1 cellpadding=0 cellspacing=0 width="100%"><null><th><b>Value</b></th><th><b>Label</b></th><th><b>Description</b></th><tr><td align="CENTER">0</td><td align="CENTER"><a name="SSC_START_CONTINOUS"></a><b>SSC_START_CONTINOUS</b><font size="-1"><br><a href="AT91RM9200_h.html#AT91C_SSC_START_CONTINOUS">AT91C_SSC_START_CONTINOUS</a></font></td><td><br>Continuous, as soon as the receiver is enabled, and immediately after the end of transfer of the previous data.</td></tr>
<tr><td align="CENTER">1</td><td align="CENTER"><a name="SSC_START_TX"></a><b>SSC_START_TX</b><font size="-1"><br><a href="AT91RM9200_h.html#AT91C_SSC_START_TX">AT91C_SSC_START_TX</a></font></td><td><br>Transmit/Receive start</td></tr>
<tr><td align="CENTER">2</td><td align="CENTER"><a name="SSC_START_LOW_RF"></a><b>SSC_START_LOW_RF</b><font size="-1"><br><a href="AT91RM9200_h.html#AT91C_SSC_START_LOW_RF">AT91C_SSC_START_LOW_RF</a></font></td><td><br>Detection of a low level on RF input</td></tr>
<tr><td align="CENTER">3</td><td align="CENTER"><a name="SSC_START_HIGH_RF"></a><b>SSC_START_HIGH_RF</b><font size="-1"><br><a href="AT91RM9200_h.html#AT91C_SSC_START_HIGH_RF">AT91C_SSC_START_HIGH_RF</a></font></td><td><br>Detection of a high level on RF input</td></tr>
<tr><td align="CENTER">4</td><td align="CENTER"><a name="SSC_START_FALL_RF"></a><b>SSC_START_FALL_RF</b><font size="-1"><br><a href="AT91RM9200_h.html#AT91C_SSC_START_FALL_RF">AT91C_SSC_START_FALL_RF</a></font></td><td><br>Detection of a falling edge on RF input</td></tr>
<tr><td align="CENTER">5</td><td align="CENTER"><a name="SSC_START_RISE_RF"></a><b>SSC_START_RISE_RF</b><font size="-1"><br><a href="AT91RM9200_h.html#AT91C_SSC_START_RISE_RF">AT91C_SSC_START_RISE_RF</a></font></td><td><br>Detection of a rising edge on RF input</td></tr>
<tr><td align="CENTER">6</td><td align="CENTER"><a name="SSC_START_LEVEL_RF"></a><b>SSC_START_LEVEL_RF</b><font size="-1"><br><a href="AT91RM9200_h.html#AT91C_SSC_START_LEVEL_RF">AT91C_SSC_START_LEVEL_RF</a></font></td><td><br>Detection of any level change on RF input</td></tr>
<tr><td align="CENTER">7</td><td align="CENTER"><a name="SSC_START_EDGE_RF"></a><b>SSC_START_EDGE_RF</b><font size="-1"><br><a href="AT91RM9200_h.html#AT91C_SSC_START_EDGE_RF">AT91C_SSC_START_EDGE_RF</a></font></td><td><br>Detection of any edge on RF input</td></tr>
<tr><td align="CENTER">8</td><td align="CENTER"><a name="SSC_START_0"></a><b>SSC_START_0</b><font size="-1"><br><a href="AT91RM9200_h.html#AT91C_SSC_START_0">AT91C_SSC_START_0</a></font></td><td><br>Compare 0</td></tr>
</null></table></font>
</td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC">15</td><td align="CENTER"><a name="SSC_STTOUT"></a><b>SSC_STTOUT</b><font size="-2"><br><a href="AT91RM9200_h.html#AT91C_SSC_STTOUT">AT91C_SSC_STTOUT</a></font></td><td><b>Receive/Transmit Start Output Selection</b><br>This bit permits the physical avoidance of generating the Receive/Transmit Frame Sync signal if it is not required.<br>0: Start is detected on the RF input signal coming from the RF pin.<br>1: Start is detected on the RF output signal generated by the Frame Sync Controller.</td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC">23..16</td><td align="CENTER"><a name="SSC_STTDLY"></a><b>SSC_STTDLY</b><font size="-2"><br><a href="AT91RM9200_h.html#AT91C_SSC_STTDLY">AT91C_SSC_STTDLY</a></font></td><td><b>Receive/Transmit Start Delay</b><br>If STTDLY is not 0, a delay of STTDLY clock cycles is inserted between the start event and the actual start of reception/transmission.<br>When the Receiver/Transmitter is programmed to start synchronously with the Transmitter/Receiver, the delay is also applied.<br>Please Note: It is very important that STTDLY be set carefully. If STTDLY must be set, it should be done in relation to TAG (Receive/Transmit Sync Data) reception.</td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC">31..24</td><td align="CENTER"><a name="SSC_PERIOD"></a><b>SSC_PERIOD</b><font size="-2"><br><a href="AT91RM9200_h.html#AT91C_SSC_PERIOD">AT91C_SSC_PERIOD</a></font></td><td><b>Receive/Transmit Period Divider Selection</b><br>This field selects the divider to apply to the selected Receive/Transmit Clock in order to generate a new Frame Sync Signal. If 0, no PERIOD signal is generated. If not 0, a PERIOD signal is generated each 2 x (PERIOD+1) Receive/Transmit Clock.</td></tr>
</null></table>
<a name="SSC_TFMR"></a><h4><a href="#SSC">SSC</a>: <i><a href="AT91RM9200_h.html#AT91_REG">AT91_REG</a></i> SSC_TFMR  <i>Transmit Frame Mode Register</i></h4><ul><null><font size="-2"><li><b>SSC2</b> <i><a href="AT91RM9200_h.html#AT91C_SSC2_TFMR">AT91C_SSC2_TFMR</a></i> 0xFFFD801C</font><font size="-2"><li><b>SSC1</b> <i><a href="AT91RM9200_h.html#AT91C_SSC1_TFMR">AT91C_SSC1_TFMR</a></i> 0xFFFD401C</font><font size="-2"><li><b>SSC0</b> <i><a href="AT91RM9200_h.html#AT91C_SSC0_TFMR">AT91C_SSC0_TFMR</a></i> 0xFFFD001C</font></null></ul><table border=1 cellpadding=0 cellspacing=0 width="100%"><null><th bgcolor="#FFFFCC"><b>Offset</b></th><th bgcolor="#FFFFCC"><b>Name</b></th><th bgcolor="#FFFFCC"><b>Description</b></th><tr><td align="CENTER" bgcolor="#FFFFCC">4..0</td><td align="CENTER"><a name="SSC_DATLEN"></a><b>SSC_DATLEN</b><font size="-2"><br><a href="AT91RM9200_h.html#AT91C_SSC_DATLEN">AT91C_SSC_DATLEN</a></font></td><td><b>Data Length</b><br>The bit stream contains DATLEN + 1 data bits. Moreover, it defines the transfer size performed by the PDC2 assigned to the Receiver/Transmitter. If DATLEN is lower or equal to 7, data transfers are in bytes. If DATLEN is between 8 and 15 (included), half-words are transferred, and for any other value, 32-bit words are transferred.</td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC">5</td><td align="CENTER"><a name="SSC_DATDEF"></a><b>SSC_DATDEF</b><font size="-2"><br><a href="AT91RM9200_h.html#AT91C_SSC_DATDEF">AT91C_SSC_DATDEF</a></font></td><td><b>Data Default Value</b><br>This bit defines the level driven on the TD pin while out of transmission. Note that if the pin is defined as multi-drive by the PIO Controller, the pin is enabled only if the SCC TD output is 1.</td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC">7</td><td align="CENTER"><a name="SSC_MSBF"></a><b>SSC_MSBF</b><font size="-2"><br><a href="AT91RM9200_h.html#AT91C_SSC_MSBF">AT91C_SSC_MSBF</a></font></td><td><b>Most Significant Bit First</b><br>0: The lowest significant bit of the data register is sampled first in the bit stream.<br>1: The most significant bit of the data register is sampled first in the bit stream.</td></tr>