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BLACKSheep® Examples page - Versionsgeschichte
2026-05-13T12:46:49Z
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Peter: 1 Version importiert
2023-10-31T08:03:05Z
<p>1 Version importiert</p>
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Peter
https://becomwiki.live.md-websolutions.com/index.php?title=BLACKSheep%C2%AE_Examples_page&diff=29&oldid=prev
en>Peter: 1 Version importiert
2023-08-22T19:35:45Z
<p>1 Version importiert</p>
<p><b>Neue Seite</b></p><div>== Scope ==<br />
[This page shows some c-Code examples for using the BLACKSheep(c) drivers.<br />
<br />
== Serial Interface Driver ==<br />
===SPI===<br />
First the SPI bus must be initialized. Than a call of SPIopen for each slave is necessary.<br><br />
Currently only the master mode is supported.<br />
<br />
<source lang="c"><br />
/*************************************************************/<br />
/* Initialize the spi bus first */<br />
/*************************************************************/<br />
<br />
unsigned long nSCLK = 125000000; // current system clock in [Hz]<br />
unsigned long nCCLK = 500000000; // current core clock in [Hz]<br />
<br />
#ifdef SPI_INIT_BUS_0<br />
nPrintWidth=printf ("Initialize SPI interface 0...");<br />
tErrorCode = SPIsetup(0, nSCLK, nCCLK, true); <br />
if(tErrorCode) {<br />
BS_PRINTF_FAILED(nPrintWidth);<br />
}<br />
else {<br />
BS_PRINTF_OK(nPrintWidth);<br />
}<br />
#endif<br />
#ifdef SPI_INIT_BUS_1<br />
nPrintWidth=printf ("Initialize SPI interface 1...");<br />
tErrorCode = SPIsetup(1, nSCLK, nCCLK, true); <br />
if(tErrorCode) {<br />
BS_PRINTF_FAILED(nPrintWidth);<br />
}<br />
else {<br />
BS_PRINTF_OK(nPrintWidth);<br />
}<br />
#endif<br />
#ifdef SPI_INIT_BUS_2<br />
nPrintWidth=printf ("Initialize SPI interface 2...");<br />
tErrorCode = SPIsetup(2, nSCLK, nCCLK, true); <br />
if(tErrorCode) {<br />
BS_PRINTF_FAILED(nPrintWidth);<br />
}<br />
else {<br />
BS_PRINTF_OK(nPrintWidth);<br />
}<br />
#endif <br />
<br />
<br />
/*************************************************************/<br />
/* Open an SPI slave */<br />
/*************************************************************/<br />
T_SPI_CONFIG SPICfg;<br />
unsigned char cSPI = 0; //SPI bus number<br />
unsigned long ulCSEL = 0x80000800; //Use PF11 as CS<br />
// unsigned long ulCSEL = 0x80001000; //Use PF12 as CS<br />
// unsigned long ulCSEL = 0x80002000; //Use PF13 as CS<br />
// unsigned long ulCSEL = 0x80004000; //Use PF14 as CS<br />
<br />
SPICfg.mbMaSl = true; //Currently only master mode is supported, so set it to true.<br />
SPICfg.mtCSEL = ulCSEL;<br />
SPICfg.mnBaudrate = 20000000; //Baudrate in [Hz]<br />
SPICfg.mnTransferSize = SPI_8BIT;<br />
SPICfg.mnClockPolarity = SPI_CPOL_HIGH;<br />
SPICfg.mnClockPhase = SPI_CPHA_HIGH;<br />
SPICfg.mnMsbLsbFirst = SPI_MSB_FIRST; //MSB first or LSB first<br />
SPICfg.mnMasterErrorFlag = SPI_NONE; //Dont change this<br />
SPICfg.msDefaultWord = 0; //Bitpattern which should be clocked out during an SPIread.<br />
<br />
T_SPI_HANDLE hSPI = SPIopen(cSPI, &SPICfg, NULL);<br />
<br />
<br />
/*************************************************************/<br />
/* Device should be ready for data transfer */<br />
/*************************************************************/<br />
unsigned short ausData[50];<br />
SPIread(hSPI, ausData, 50, NULL); //Read out 50 bytes of data.<br />
SPIwrite(hSPI, ausData, 50, NULL); //Write 50 bytes of data.<br />
<br />
<br />
<br />
</source></div>
en>Peter