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error in spi programming of tmdxevm6678 EVM

chandu dusa
Intellectual 870 points

Hi,

   my program for initializing SPI . 

   **********************************

#include <c6x.h>
#include <stdint.h>
#include <evmc66x_spi.h>

void main(void) {

// status=spi_claim(0,1000000)//

/* Enable the SPI hardware */
SPI_SPIGCR0 = CSL_SPI_SPIGCR0_RESET_IN_RESET;
spi_delay (2000);
SPI_SPIGCR0 = CSL_SPI_SPIGCR0_RESET_OUT_OF_RESET;

}

*************************

Error:

unresolved symbol Osal_platformSpiCsEnter, first referenced in    ./evmc66x_spi.obj spi C/C++       Problem
unresolved symbol Osal_platformSpiCsExit, first referenced in        ./evmc66x_spi.obj spi C/C++       Problem

1)what the above error indicates please help me solving the error.

2) how can I get the 10mhz frequency clock from SPI_CLK pin, please give source code or give me idea.

Please help me in getting above two problems to solve. 

thanking you.

regards,

chandu.

  • 0
    TI__Genius 12065 points

    1. Do you still see the error please?

    I think the compiler could complain "spi_delay()" function since it is defined as "static" in "evmc66x_spi.c". You can copy it over to your "spi.c" if you see errors.

    But I do not see any problem with "Osal..." symbols you mentioned.

    2. Section 2.1 in SPI user guide mentions the equation of SPICLK. The SPI module clock seems to be SYSCLK1/6, where SYSCLK1 is the CorePac clock.

    You can program PRESCALE in SPI register to get the clock frequency you need.