K70, MQX 4.1 SPI I/O Drivers, Codewarrior CW 10.6 GCC

louiemoye — Tue, 16 Aug 2016 17:23:07 GMT

Hello,

I've read several posts on this forum where others are experiencing the same issue as I am having. Unfortunately, they are working with different versions of MQX and processor. I'm reying to use MQX 4.1 SPI IO driver on K70, to read a serial Flash part (Micron M25P20). I believe I have everything cpnfigured properly as I am seeing exactly what I expect on the SPI bus: Setting the WEL bit to the status register, then reading the status register. I expect 0x02, and this is what I'm seeing on the MISO line. /CS, SCLK, MOSI, and MISO timing and data look correct, however, the read buffer always report 0x00. I've tried _io_ioctl without success (following). Below is my actual read function. Any help would be great,

Regards,

Louie

/* Test simultaneous write and read to stat reg */

memset (send_buffer, 0, sizeof (send_buffer));

memset (recv_buffer, 0, sizeof (recv_buffer));

send_buffer[0] = SPI_MEMORY_READ_STATUS;

rw.BUFFER_LENGTH = 1;

rw.WRITE_BUFFER = (char *)send_buffer;

rw.READ_BUFFER = (char *)recv_buffer;

printf ("IO_IOCTL_SPI_READ_WRITE ... ");

if (SPI_OK == _io_ioctl (m_spifd, IO_IOCTL_SPI_READ_WRITE, &rw))

{

printf ("OK\n");

}

else

{

printf ("ERROR\n");

}

_io_fflush (m_spifd);

unsigned char SerialEEPROM::ReadStatus()

{

_mqx_int result;

uint8_t rxVal = 0xFF;

spiTxBuf = new unsigned char[SPI_TMP_BUF_SIZE];

spiRxBuf = new unsigned char[SPI_TMP_BUF_SIZE];

spiTxBuf[0] = STATUS_REG;

result = _io_write(m_spifd, spiTxBuf, 1);

result = _io_read(m_spifd, spiRxBuf, 1);

_io_fflush(m_spifd);

rxVal = spiRxBuf[0];

delete(spiTxBuf);

delete(spiRxBuf);

return rxVal;

}

Re: K70, MQX 4.1 SPI I/O Drivers, Codewarrior CW 10.6 GCC

louiemoye — Fri, 19 Aug 2016 22:02:45 GMT

I resolved this issue by disabling the SPIMaster (SPI2) component in ProcessorExpert, and modifying init_gpio.c in the BSP_Files directory

Changed to PORTF configuration:

/* Configure GPIOF for DSPI2 peripheral function */

pctl = (PORT_MemMapPtr)PORTF_BASE_PTR;

pctl->PCR[16] = PORT_PCR_MUX(2); /* DSPI2.PCS0 */

pctl->PCR[17] = PORT_PCR_MUX(2); /* DSPI2.SCK */

pctl->PCR[18] = PORT_PCR_MUX(2); /* DSPI2.SOUT */

pctl->PCR[19] = PORT_PCR_MUX(2); /* DSPI2.SIN */

pctl->PCR[20] = PORT_PCR_MUX(2); /* DSPI2.PCS1 */

Was:

/* Configure GPIOD for DSPI2 peripheral function */

pctl = (PORT_MemMapPtr)PORTD_BASE_PTR;

pctl->PCR[11] = PORT_PCR_MUX(2); /* DSPI2.PCS0 */

pctl->PCR[12] = PORT_PCR_MUX(2); /* DSPI2.SCK */

pctl->PCR[13] = PORT_PCR_MUX(2); /* DSPI2.SOUT */

pctl->PCR[14] = PORT_PCR_MUX(2); /* DSPI2.SIN */

pctl->PCR[15] = PORT_PCR_MUX(2); /* DSPI2.PCS1 */

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K70, MQX 4.1 SPI I/O Drivers, Codewarrior CW 10.6 GCC

Re: K70, MQX 4.1 SPI I/O Drivers, Codewarrior CW 10.6 GCC