I have been trying to get SPI0 up and running with my beaglebone. I have tried to follow the list in the StarterWare userguide (02_00_00_06 page 121-122). However i can't complete the first three steps, as these functions are not described in the API help. Do you know any workaround, or are these functions not a part of the API?
The first three steps (where i am failing) according to the StarterWare userguide.
- Clocks for McSPI peripheral are enabled using the function McSPI0ModuleClkConfig()
- Pin muxing for SPI_CLK, SPI_D0, SPI_D1 pins can be done by calling the function McSPIPinMuxSetup()
- Pin muxing for chip select(CS) is done by using the function McSPI0CSPinMuxSetup()
Below is my SPI 0 init code so far:
void SPIinit()
{
/*
* Clocks for McSPI peripheral are enabled using the function McSPI0ModuleClkConfig()
*/
// Not ready
/*
* Pin muxing for SPI_CLK, SPI_D0, SPI_D1 pins can be done by calling the function McSPIPinMuxSetup()
*/
// Not ready
/*
* Pin muxing for chip select(CS) is done by using the function McSPI0CSPinMuxSetup()
*/
// Not ready
/*
* McSPI is placed in local reset state by using McSPIReset() API
*/
McSPIReset(SOC_SPI_0_REGS);
/*
*McSPI can be configured in 4-pin mode(CLK, D0, D1, CS) by using McSPICSEnable() API
*/
McSPICSEnable(SOC_SPI_0_REGS);
/*
* McSPI is enabled in Master mode of operation using the McSPIMasterModeEnable() API
*/
McSPIMasterModeEnable(SOC_SPI_0_REGS);
/*
* To configure Single/Multi channel mode, transmit/receive modes and settings for IS, DPE0, DPE1 can be done by
* using the McSPIMasterModeConfig() API. The settings for IS, DPE0 and DPE1 will configure the direction for
* SPID0 and SPID1 pins as input or output. Please refer to the schematics to verify the SPI data pin connections
* and do the setting accordingly. This API will return “FALSE” if an invalid configuration is done for IS,DPE0 and
* DPE1 pins which the McSPI controller cannot process.
*/
McSPIMasterModeConfig(SOC_SPI_0_REGS,MCSPI_MULTI_CH,
MCSPI_TX_RX_MODE,
MCSPI_DATA_LINE_COMM_MODE_0,
MCSPI_CHANNEL_0
);
/*
McSPI clock configuration is done using the McSPIClkConfig() API. Granularity settings of 1 clock cycle or 2^n
clock cycles can be done in this API. Also phase and polarity of McSPI clock can be configured here.
*/
McSPIClkConfig(SOC_SPI_0_REGS,
48000000,
6000000,
MCSPI_CHANNEL_0,
MCSPI_CLK_MODE_0
);
/*
*McSPI word length is configured using the McSPIWordLengthSet() API
*/
McSPIWordLengthSet(SOC_SPI_0_REGS,MCSPI_WORD_LENGTH(8),MCSPI_CHANNEL_0);
/*
* Enable the required McSPI channel by using the McSPIChannelEnable() API. Once this API is called McSPI can
* generate interrupts depending on the setting.
*/
McSPIChannelEnable(SOC_SPI_0_REGS,MCSPI_CHANNEL_0);
}
