topic Re: SPI issue with K70 using PE and mqx lite in Processor Expert Software

SPI issue with K70 using PE and mqx lite

leepenn — Thu, 07 Feb 2013 15:25:42 GMT

I have a project in which I have initialized an spi port, My code using the SendBlock only has the CS and clock work for two bytes. When data size is set higher it leaves the CS and CLOCK low. See code below,

Task

void PowerChip_task(uint32_t task_init_data)

{

int counter = 0;

PowerChip_SPI_Init(PowerChip_SPI_DeviceData);

PowerChip_InitSPI();

while(1) {

counter++;

/* Write your code here ... */

PowerChip_ReadSPI();

}

void PowerChip_InitSPI(void)

{

LDD_TError SPI_Error=0;

int counter = 0;

POWER_CHIP_SPI_DATA8_STRUCT DummyWrite={0xF};

DummyWrite.OperationType=SPI_Write_Byte;

DummyWrite.RegisterAddrLSB=SPI_DummyAddress>>1;

DummyWrite.RegisterAddrMSB=SPI_DummyAddress>>8;

//Initialize DIO reset of Power Chip

PowerChip_Reset_Init(PowerChip_Reset_DeviceData);

//Toggle reset of Power Chip

PowerChip_Reset_ClrVal(PowerChip_Reset_DeviceData);

_time_delay_ticks(50);

PowerChip_Reset_SetVal(PowerChip_Reset_DeviceData);

_time_delay_ticks(50);

while (counter < 3)

{

SPI_Error=PowerChip_SPI_SendBlock(PowerChip_SPI_DeviceData,&DummyWrite,sizeof(DummyWrite));

if(SPI_Error>0)

{

break;

}

++counter;

}

Re: SPI issue with K70 using PE and mqx lite

Petr_H — Mon, 11 Feb 2013 12:11:00 GMT

Hi,

Could you please post a simple project with component and its settings ? It's not clear how the component and the CPU is configured.

best regards

Petr Hradsky

Processor Expert Support Team

Re: SPI issue with K70 using PE and mqx lite

leepenn — Wed, 13 Feb 2013 14:53:33 GMT

Here is the component settings from PE.

Re: SPI issue with K70 using PE and mqx lite

Petr_H — Wed, 20 Feb 2013 10:20:20 GMT

Hi,

From your code, there seems to be missing some parts - there is no wait for end of the transfer.

Please see the help for the component (e.g. using pop-up menu command Help on Component") , the Typical usage page. It contains example of basic usage with and without using interrupts.

Your code in PowerChip_InitSPI passes a reference to local variable which might be a problem when the function ends but the sending would continue.

We have tested transfer of four bytes using your settings and it worked properly. We recommend to also check the bus if there is no other influence disturbing the communication.

best regards

Petr Hradsky

Processor Expert Support Team

Re: SPI issue with K70 using PE and mqx lite

Angelillo — Tue, 02 Apr 2013 13:31:51 GMT

Hi Lee,

Have you got MQX Lite on K70?? I have seen that MQX Lite is compatible with KL series only...

Thank you,

Angel G.

Re: SPI issue with K70 using PE and mqx lite

Petr_H — Tue, 02 Apr 2013 14:12:47 GMT

The MQX lite is not supported on K70. It's currently available only for Kinetis L.

On K family, there is only standard MQX, which offers PEx support when you customize the BSP project.

best regards

Petr Hradsky

Processor Expert Support Team

Re: SPI issue with K70 using PE and mqx lite

Angelillo — Mon, 08 Apr 2013 06:57:49 GMT

Ok Thank you very much Petr!