/** Public method to send messages to the Module. This will send one message and then receive the
Synchronous Response (SRSP) message from the Module to indicate the command was received.
@pre zmBuf contains a properly formatted message
@pre Module has been initialized
@post buffer zmBuf contains the response (if any) from the Module.
*/
moduleResult_t sendMessage()
{
#ifdef ZM_PHY_SPI_VERBOSE
printf("Tx: ");
printHexBytes(zmBuf, zmBuf[0] + 3);
#endif
uint8_t expectedSrspCmdMsb = zmBuf[1] + SRSP_OFFSET; //store these so we can compare with what is returned
uint8_t expectedSrspCmdLsb = zmBuf[2];
moduleResult_t result = sendSreq(); //send message, buffer now holds received data
if (result != MODULE_SUCCESS) //ERROR - sendSreq() timeout
{
#ifdef ZM_PHY_SPI_VERBOSE_ERRORS
printf("ERROR - sreq() timeout %02X\r\n", result);
#endif
return result;
}
/* The correct SRSP will always be 0x4000 + cmd, or simpler 0x4000 | cmd
For example, if the SREQ is 0x2605 then the corresponding SRSP is 0x6605 */
if ((zmBuf[SRSP_CMD_MSB_FIELD] == expectedSrspCmdMsb) && (zmBuf[SRSP_CMD_LSB_FIELD] == expectedSrspCmdLsb)) //verify the correct SRSP was received
{
return MODULE_SUCCESS;
} else {
#ifdef ZM_PHY_SPI_VERBOSE_ERRORS
printf("ERROR - Wrong SRSP - received %02X-%02X, expected %02X-%02X\r\n", zmBuf[1], zmBuf[2],expectedSrspCmdMsb,expectedSrspCmdLsb);
#endif
return ZM_PHY_INCORRECT_SRSP; //Wrong SRSP received
}
}
/** Public method to send messages to the ZNP. This will send one message and then receive the
Synchronous Response (SRSP) message from the ZNP to indicate the command was received.
@pre znpBuf contains a properly formatted message
@pre ZNP has been initialized
@post buffer znpBuf contains the response (if any) from the ZNP.
@return 0 if the SRSP received was the expected SRSP, -11 if it was NOT the expected SRSP,
-12 if sendSreq timeout, or -13 if too many bytes received.
*/
signed int sendMessage()
{
#ifdef ZNP_INTERFACE_SPI_VERBOSE
printf("Tx: ");
printHexBytes(znpBuf, znpBuf[0] + 3);
#endif
unsigned char expectedSrspCmdMsb = znpBuf[1] + 0x40;
unsigned char expectedSrspCmdLsb = znpBuf[2];
signed int result = sendSreq(); //send message, buffer now holds received data
if (result != 0) //ERROR - spiSreq() timeout
{
#ifdef ZNP_INTERFACE_SPI_VERBOSE
printf("ERROR - sreq() timeout %i\r\n", result);
#endif
return -12;
}
if (znpBuf[0] > SRSP_BUFFER_SIZE) //Error - SRSP length exceeds buffer size
{
#ifdef ZNP_INTERFACE_SPI_VERBOSE
printf("ERROR - SRSP too long %u > %u\r\n", znpBuf[0], SRSP_BUFFER_SIZE);
#endif
return -13;
}
//The correct SRSP will always be 0x4000 + cmd, or simpler 0x4000 | cmd
//For example, if the SREQ is 0x2605 then the corresponding SRSP is 0x6605
if ((znpBuf[1] == expectedSrspCmdMsb) && (znpBuf[2] == expectedSrspCmdLsb)) //verify the correct SRSP was received
return 0;
else
{
#ifdef ZNP_INTERFACE_SPI_VERBOSE
printf("ERROR - Wrong SRSP - received %02X-%02X, expected %02X-%02X\r\n", znpBuf[1], znpBuf[2],expectedSrspCmdMsb,expectedSrspCmdLsb);
#endif
return -11; //Wrong SRSP received
}
}
/** Reset the ZNP and then get the MAC. */
int main( void )
{
halInit(); //Initialize hardware
halSpiInitZnp();
printf("Resetting ZNP to get MAC address\r\n");
RADIO_OFF();
delayMs(1);
RADIO_ON();
spiPoll();
for (int i=0; i< (znpBuf[0] + 3); i++)
printf("%02X ", znpBuf[i]);
printf("\r\n");
znpBuf[0] = 1; //ZB_GET_DEVICE_INFO_PAYLOAD_LEN;
znpBuf[1] = 0x26; //MSB(ZB_GET_DEVICE_INFO);
znpBuf[2] = 0x06; //LSB(ZB_GET_DEVICE_INFO);
znpBuf[3] = 1; //DIP_MAC_ADDRESS;
sendSreq();
printf("MAC Address, LSB first:");
for (int i=4; i< (znpBuf[0] + 3); i++)
printf("%02X ", znpBuf[i]);
printf("\r\n");
}
//moduleResult_t spiPoll()
moduleResult_t getMessage()
{
*zmBuf = 0; *(zmBuf+1) = 0; *(zmBuf+2) = 0; //poll message is 0,0,0
return(sendSreq());
}
/** From znp_interface_spi.c */
signed int spiPoll()
{
*znpBuf = 0; *(znpBuf+1) = 0; *(znpBuf+2) = 0; //poll message is 0,0,0
return(sendSreq());
}
