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📁 1、程序目的:介绍AT91SAM7S256-EK TWI的基本用法: 2、 功能说明:通过TWI实现I2C
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<meta charset="iso-8859-1" content="Arm / ATMEL/ AT91 library / AT91SAM7A3" http-equiv="Content-Type">
<title>Hardware API Selector: AT91SAM7A3 Definitions</title>
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<h1>Synchronous Serial Controller Interface Peripheral</h1>
<null><a name="SSC0"></a><b>SSC0</b> <i><font size="-1">(<a href="AT91SAM7A3_h.html#AT91S_SSC">AT91S_SSC</a>)</font></i><b>  0xFFFD0000 </b><i><font size="-1">(<a href="AT91SAM7A3_h.html#AT91C_BASE_SSC0">AT91C_BASE_SSC0</a>)</font></i>
<table border=1 cellpadding=3 cellspacing=0><null><th bgcolor="#FFFFCC"><font size="-1">Periph ID <a href="#AIC">AIC</a></font></th><th bgcolor="#FFFFCC"><font size="-1">Symbol</font></th><th bgcolor="#FFFFCC"><font size="-1">Description</font></th><tr><td bgcolor="#FFFFCC"><font size="-1"><b>13</b> </font></td><td><font size="-1"><i><font size="-1">(<a href="AT91SAM7A3_h.html#AT91C_ID_SSC0">AT91C_ID_SSC0</a>)</font></i></font></td><td><font size="-1">Serial Synchronous Controller 0</font></td></tr>
</null></table><br><table border=1 cellpadding=3 cellspacing=0><null><th bgcolor="#FFFFCC"><font size="-1"><b>Signal</b></font></th><th bgcolor="#FFFFCC"><font size="-1"><b>Symbol</b></font></th><th bgcolor="#FFFFCC"><font size="-1"><b>PIO controller</b></font></th><th bgcolor="#FFFFCC"><font size="-1"><b>Description</b>
</font></th><tr><td bgcolor="#FFFFCC"><font size="-1"><b>TD0</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PB4_TD0     ">AT91C_PB4_TD0     </a>)</font></i></font></td><td><font size="-1"><a href="#PIOB">PIOB</a>  Periph: A Bit: 4</font></td><td><font size="-1">SSC Transmit data</font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>RF0</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PB7_RF0     ">AT91C_PB7_RF0     </a>)</font></i></font></td><td><font size="-1"><a href="#PIOB">PIOB</a>  Periph: A Bit: 7</font></td><td><font size="-1">SSC Receive Frame Sync 0</font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>TK0</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PB3_TK0     ">AT91C_PB3_TK0     </a>)</font></i></font></td><td><font size="-1"><a href="#PIOB">PIOB</a>  Periph: A Bit: 3</font></td><td><font size="-1">SSC Transmit Clock 0</font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>TF0</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PB2_TF0     ">AT91C_PB2_TF0     </a>)</font></i></font></td><td><font size="-1"><a href="#PIOB">PIOB</a>  Periph: A Bit: 2</font></td><td><font size="-1">SSC Transmit Frame Sync 0</font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>RK0</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PB6_RK0     ">AT91C_PB6_RK0     </a>)</font></i></font></td><td><font size="-1"><a href="#PIOB">PIOB</a>  Periph: A Bit: 6</font></td><td><font size="-1">SSC Receive Clock</font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>RD0</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PB5_RD0     ">AT91C_PB5_RD0     </a>)</font></i></font></td><td><font size="-1"><a href="#PIOB">PIOB</a>  Periph: A Bit: 5</font></td><td><font size="-1">SSC Receive Data</font></td></tr>
</null></table><br><table border=1 cellpadding=0 cellspacing=0 width="100%"><null><th bgcolor="#FFFFCC"><font size="-1"><b>Function</b></font></th><th bgcolor="#FFFFCC"><font size="-1"><b>Description</b></font></th><tr><td bgcolor="#FFFFCC"><font size="-1"><b><a href="lib_AT91SAM7A3_h.html#AT91F_SSC0_CfgPMC">AT91F_SSC0_CfgPMC</a></b></font></td><td><font size="-1">Enable Peripheral clock in PMC for SSC0</font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b><a href="lib_AT91SAM7A3_h.html#AT91F_SSC0_CfgPIO">AT91F_SSC0_CfgPIO</a></b></font></td><td><font size="-1">Configure PIO controllers to drive SSC0 signals</font></td></tr>
</null></table><br><br><a name="SSC1"></a><b>SSC1</b> <i><font size="-1">(<a href="AT91SAM7A3_h.html#AT91S_SSC">AT91S_SSC</a>)</font></i><b>  0xFFFD4000 </b><i><font size="-1">(<a href="AT91SAM7A3_h.html#AT91C_BASE_SSC1">AT91C_BASE_SSC1</a>)</font></i>
<table border=1 cellpadding=3 cellspacing=0><null><th bgcolor="#FFFFCC"><font size="-1">Periph ID <a href="#AIC">AIC</a></font></th><th bgcolor="#FFFFCC"><font size="-1">Symbol</font></th><th bgcolor="#FFFFCC"><font size="-1">Description</font></th><tr><td bgcolor="#FFFFCC"><font size="-1"><b>14</b> </font></td><td><font size="-1"><i><font size="-1">(<a href="AT91SAM7A3_h.html#AT91C_ID_SSC1">AT91C_ID_SSC1</a>)</font></i></font></td><td><font size="-1">Serial Synchronous Controller 1</font></td></tr>
</null></table><br><table border=1 cellpadding=3 cellspacing=0><null><th bgcolor="#FFFFCC"><font size="-1"><b>Signal</b></font></th><th bgcolor="#FFFFCC"><font size="-1"><b>Symbol</b></font></th><th bgcolor="#FFFFCC"><font size="-1"><b>PIO controller</b></font></th><th bgcolor="#FFFFCC"><font size="-1"><b>Description</b>
</font></th><tr><td bgcolor="#FFFFCC"><font size="-1"><b>RK1</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PB10_RK1     ">AT91C_PB10_RK1     </a>)</font></i></font></td><td><font size="-1"><a href="#PIOB">PIOB</a>  Periph: B Bit: 10</font></td><td><font size="-1">SSC Receive Clock 1</font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>TK1</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PB9_TK1     ">AT91C_PB9_TK1     </a>)</font></i></font></td><td><font size="-1"><a href="#PIOB">PIOB</a>  Periph: B Bit: 9</font></td><td><font size="-1">SSC Transmit Clock 1</font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>TF1</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PB8_TF1     ">AT91C_PB8_TF1     </a>)</font></i></font></td><td><font size="-1"><a href="#PIOB">PIOB</a>  Periph: B Bit: 8</font></td><td><font size="-1">SSC Transmit Frame Sync 1</font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>RF1</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PB11_RF1     ">AT91C_PB11_RF1     </a>)</font></i></font></td><td><font size="-1"><a href="#PIOB">PIOB</a>  Periph: B Bit: 11</font></td><td><font size="-1">SSC Receive Frame Sync 1</font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>TD1</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PB12_TD1     ">AT91C_PB12_TD1     </a>)</font></i></font></td><td><font size="-1"><a href="#PIOB">PIOB</a>  Periph: B Bit: 12</font></td><td><font size="-1">SSC Transmit Data 1</font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>RD1</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PB13_RD1     ">AT91C_PB13_RD1     </a>)</font></i></font></td><td><font size="-1"><a href="#PIOB">PIOB</a>  Periph: B Bit: 13</font></td><td><font size="-1">SSC Receive Data 1</font></td></tr>
</null></table><br><table border=1 cellpadding=0 cellspacing=0 width="100%"><null><th bgcolor="#FFFFCC"><font size="-1"><b>Function</b></font></th><th bgcolor="#FFFFCC"><font size="-1"><b>Description</b></font></th><tr><td bgcolor="#FFFFCC"><font size="-1"><b><a href="lib_AT91SAM7A3_h.html#AT91F_SSC1_CfgPIO">AT91F_SSC1_CfgPIO</a></b></font></td><td><font size="-1">Configure PIO controllers to drive SSC1 signals</font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b><a href="lib_AT91SAM7A3_h.html#AT91F_SSC1_CfgPMC">AT91F_SSC1_CfgPMC</a></b></font></td><td><font size="-1">Enable Peripheral clock in PMC for SSC1</font></td></tr>
</null></table><br><br></null><a name="SSC"></a><h2>SSC Software API <i><font size="-1">(<a href="AT91SAM7A3_h.html#AT91S_SSC">AT91S_SSC</a>)</font></i></h2>
<a name="SSC"></a><null><table border=1 cellpadding=0 cellspacing=0 width="100%"><null><th bgcolor="#FFFFCC"><font size="-1"><b>Offset</b></font></th><th bgcolor="#FFFFCC"><font size="-1"><b>Field</b></font></th><th bgcolor="#FFFFCC"><font size="-1"><b>Description</b></font></th>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0x0</b></font></td><td><font size="-1"><a href="AT91SAM7A3_SSC.html#SSC_CR">SSC_CR</a></font></td><td><font size="-1">Control Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0x4</b></font></td><td><font size="-1"><a href="AT91SAM7A3_SSC.html#SSC_CMR">SSC_CMR</a></font></td><td><font size="-1">Clock Mode Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0x10</b></font></td><td><font size="-1"><a href="AT91SAM7A3_SSC.html#SSC_RCMR">SSC_RCMR</a></font></td><td><font size="-1">Receive Clock ModeRegister</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0x14</b></font></td><td><font size="-1"><a href="AT91SAM7A3_SSC.html#SSC_RFMR">SSC_RFMR</a></font></td><td><font size="-1">Receive Frame Mode Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0x18</b></font></td><td><font size="-1"><a href="AT91SAM7A3_SSC.html#SSC_TCMR">SSC_TCMR</a></font></td><td><font size="-1">Transmit Clock Mode Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0x1C</b></font></td><td><font size="-1"><a href="AT91SAM7A3_SSC.html#SSC_TFMR">SSC_TFMR</a></font></td><td><font size="-1">Transmit Frame Mode Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0x20</b></font></td><td><font size="-1"><a href="AT91SAM7A3_SSC.html#SSC_RHR">SSC_RHR</a></font></td><td><font size="-1">Receive Holding Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0x24</b></font></td><td><font size="-1"><a href="AT91SAM7A3_SSC.html#SSC_THR">SSC_THR</a></font></td><td><font size="-1">Transmit Holding Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0x30</b></font></td><td><font size="-1"><a href="AT91SAM7A3_SSC.html#SSC_RSHR">SSC_RSHR</a></font></td><td><font size="-1">Receive Sync Holding Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0x34</b></font></td><td><font size="-1"><a href="AT91SAM7A3_SSC.html#SSC_TSHR">SSC_TSHR</a></font></td><td><font size="-1">Transmit Sync Holding Register</font></td></tr>

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