Tool/software: TI-RTOS
hi,
i have problem reading UID/getting interrupts from TRF7970A after sending commands through SPI .
i am using two threads in my program.one thread is used to read data/command from UART and to send the same received Command/data to another thread using MAILBOX.
thread 2 is used to send receive commands/data from TFR7970 using SPI and also send back the uid or data present in tags to UART thread via the same MAILBOX.
the problem here i see is:
1.i am reading and successfully sent the UID back to UART. while debugging the code with below spi code.
void SPI_directCommand( uint8_t command )
{
SPI_Transaction masterTransaction;
bool transferOK;
// set Address/Command Word Bit Distribution to command
command = (0x80 | command); // command
command = (0x9f & command); // command code
masterTransaction.count = 1;
masterTransaction.txBuf = ( Ptr )&command;
masterTransaction.rxBuf = NULL;
GPIO_write(CC2640R2_LAUNCHXL_GPIO_SPI_CS, 0);
transferOK = SPI_transfer( masterSpi, &masterTransaction );
while(false == bSpiComplete);
bSpiComplete = false;
GPIO_write(CC2640R2_LAUNCHXL_GPIO_SPI_CS, 1); //Stop SPI Mode
if( !transferOK )
{
System_printf("Unsuccessful master SPI_directCommand transfer\n\n");
System_flush();
}
else
{
System_printf("Successful master SPI transfer\n\n");
System_flush();
}
}
void SPI_readSingle(uint8_t *pbuf, uint8_t reg)
{
SPI_Transaction masterTransaction;
uint8_t DummyByte[2];
bool transferOK;
volatile uint8_t x;
uint8_t WriteData[3];
// Address/Command Word Bit Distribution
// address, write, single (fist 3 bits = 0)
reg = (0x1f & reg); // register address
reg = (0x40 | reg); // address, read, single
WriteData[0] = reg;//address
WriteData[1] = 0xff;//dummy byte to get the data out from slave
masterTransaction.count = 2;
masterTransaction.txBuf = ( Ptr )&WriteData;
masterTransaction.rxBuf = ( Ptr )&DummyByte;
GPIO_write(CC2640R2_LAUNCHXL_GPIO_SPI_CS, 0);
transferOK = SPI_transfer( masterSpi, &masterTransaction );
while(false == bSpiComplete);
bSpiComplete = false;
GPIO_write(CC2640R2_LAUNCHXL_GPIO_SPI_CS, 1);
*pbuf = DummyByte[1];
if( !transferOK )
{
System_printf("Unsuccessful master SPI transfer\n");
}
}
2. i cannot able to read UID/not getting any interrupts if i comment "System_printf" statements in the same spi code.
what might be the problem..
1.issue with System_printf statements -- will they take time of rtos task(blocking the task) to print it in console.
2.issue with tasks and mail boxes.
3.issue with spi.
