SPI read is not working with default driver.

kishoresamy — Wed, 23 Mar 2016 13:29:00 GMT

Hi,

I have created the project for kl46z. I have used processor expert in codewarrior.

There i have enabled SPI component with interrupt method

So the library created with the name called SM1.c, now the interrupt function (ISR) default

created like this :

PE_ISR(SM1_Interrupt)

{

/* {FreeRTOS RTOS Adapter} ISR parameter is passed through the global variable */

SM1_TDeviceDataPtr DeviceDataPrv = INT_SPI0__BAREBOARD_RTOS_ISRPARAM;

uint8_t StatReg = SPI_PDD_ReadStatusReg(SPI0_BASE_PTR); /* Read status register */

(void)DeviceDataPrv; /* Supress unused variable warning if needed */

if ((StatReg & SPI_PDD_RX_BUFFER_FULL) != 0U) { /* Is any char in HW Rx buffer? */

if (DeviceDataPrv->InpDataNumReq != 0x00U) { /* Is the receive block operation pending? */

*(DeviceDataPrv->InpDataPtr++) = SPI_PDD_ReadData8bit(SPI0_BASE_PTR); /* Put a character to the receive buffer and increment pointer to receive buffer */

DeviceDataPrv->InpRecvDataNum++; /* Increment received char. counter */

if (DeviceDataPrv->InpRecvDataNum == DeviceDataPrv->InpDataNumReq) { /* Is the requested number of characters received? */

SPI_PDD_DisableInterruptMask(SPI0_BASE_PTR, SPI_PDD_RX_BUFFER_FULL_OR_FAULT); /* Disable Rx buffer full interrupt */

DeviceDataPrv->InpDataNumReq = 0x00U; /* If yes then clear number of requested characters to be received. */

SM1_OnBlockReceived(DeviceDataPrv->UserData);

}

if ((StatReg & SPI_PDD_TX_BUFFER_EMPTYG) != 0U) { /* Is HW Tx buffer empty? */

if (DeviceDataPrv->OutSentDataNum < DeviceDataPrv->OutDataNumReq) { /* Is number of sent characters less than the number of requested incoming characters? */

SPI_PDD_WriteData8Bit(SPI0_BASE_PTR, (*((uint8_t *)DeviceDataPrv->OutDataPtr++))); /* Put a character with command to the transmit register and increment pointer to the transmitt buffer */

DeviceDataPrv->OutSentDataNum++; /* Increment the counter of sent characters. */

if (DeviceDataPrv->OutSentDataNum == DeviceDataPrv->OutDataNumReq) {

DeviceDataPrv->OutDataNumReq = 0x00U; /* Clear the counter of characters to be send by SendBlock() */

SM1_OnBlockSent(DeviceDataPrv->UserData);

}

} else {

SPI_PDD_DisableInterruptMask(SPI0_BASE_PTR, SPI_PDD_TX_BUFFER_EMPTY); /* Disable TX interrupt */

}

But with this code SPI read function is not working. But i made it working with including two lines

in PE_ISR(SM1_Interrupt). i copied here my changes

included two lines are highlighted with BOLD letter down:

PE_ISR(SM1_Interrupt)

{

/* {FreeRTOS RTOS Adapter} ISR parameter is passed through the global variable */

SM1_TDeviceDataPtr DeviceDataPrv = INT_SPI0__BAREBOARD_RTOS_ISRPARAM;

uint8_t StatReg = SPI_PDD_ReadStatusReg(SPI0_BASE_PTR); /* Read status register */

(void)DeviceDataPrv; /* Supress unused variable warning if needed */

if (DeviceDataPrv->OutDataNumReq == 0x00U)

if ((StatReg & SPI_PDD_RX_BUFFER_FULL) != 0U) { /* Is any char in HW Rx buffer? */

if (DeviceDataPrv->InpDataNumReq != 0x00U) { /* Is the receive block operation pending? */

*(DeviceDataPrv->InpDataPtr++) = SPI_PDD_ReadData8bit(SPI0_BASE_PTR); /* Put a character to the receive buffer and increment pointer to receive buffer */

SPI_PDD_WriteData8Bit(SPI0_BASE_PTR, 0);

DeviceDataPrv->InpRecvDataNum++; /* Increment received char. counter */

if (DeviceDataPrv->InpRecvDataNum == DeviceDataPrv->InpDataNumReq) { /* Is the requested number of characters received? */

SPI_PDD_DisableInterruptMask(SPI0_BASE_PTR, SPI_PDD_RX_BUFFER_FULL_OR_FAULT); /* Disable Rx buffer full interrupt */

DeviceDataPrv->InpDataNumReq = 0x00U; /* If yes then clear number of requested characters to be received. */

SM1_OnBlockReceived(DeviceDataPrv->UserData);

}

if ((StatReg & SPI_PDD_TX_BUFFER_EMPTYG) != 0U) { /* Is HW Tx buffer empty? */

if (DeviceDataPrv->OutSentDataNum < DeviceDataPrv->OutDataNumReq) { /* Is number of sent characters less than the number of requested incoming characters? */

SPI_PDD_WriteData8Bit(SPI0_BASE_PTR, (*((uint8_t *)DeviceDataPrv->OutDataPtr++))); /* Put a character with command to the transmit register and increment pointer to the transmitt buffer */

DeviceDataPrv->OutSentDataNum++; /* Increment the counter of sent characters. */

if (DeviceDataPrv->OutSentDataNum == DeviceDataPrv->OutDataNumReq) {

DeviceDataPrv->OutDataNumReq = 0x00U; /* Clear the counter of characters to be send by SendBlock() */

SM1_OnBlockSent(DeviceDataPrv->UserData);

}

} else {

SPI_PDD_DisableInterruptMask(SPI0_BASE_PTR, SPI_PDD_TX_BUFFER_EMPTY); /* Disable TX interrupt */

}

Now all working fine. But whenever i do clear and build for my project, all generated files created with

default code. so my changes also got erased. I want that two line to be there always even if

do clear and build. Basically default SPI driver function PE_ISR(SM1_Interrupt) is not working

for me. so i changed that function so that i am able to communicate over the SPI. how to

stop regenerating SM1.c when i do clear and build?

Re: SPI read is not working with default driver.

Alice_Yang — Thu, 24 Mar 2016 02:18:16 GMT

Hello kishore,

After you finish changing the code , please select the "Don't writhe generated component modules":

then when you build the code, it will not changed , and also when you re change the configuration

of the SPI component , please select the "Always write.." option , or it also can not change the code .

Hope it helps

Have a great day,
Alice Yang

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Re: SPI read is not working with default driver.

kishoresamy — Thu, 24 Mar 2016 06:31:36 GMT

Hello Alice,

Thank you so much. my issue solved after following your instruction.

Thanks & Rgds,

Kishore R.

Re: SPI read is not working with default driver.

Alice_Yang — Thu, 24 Mar 2016 09:46:27 GMT

Hi Kishore,

Welcome !

If the answer is right , It will be very nice you click the "Mark Correct" , then are people can refer to .

Alice

topic SPI read is not working with default driver. in CodeWarrior for MCU

SPI read is not working with default driver.

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Re: SPI read is not working with default driver.

Re: SPI read is not working with default driver.