/******************************************************************************
* @fn perCC1120CC1190EnterIdle
*
* @brief Enters IDLE from ANY state. Function is used to abstract the
* cc1120cc1190RadioTxRx functionality away from the lower-level radio
* interface.
*
* input parameters
*
* @param none
*
* output parameters
*
* @return void
*/
void perCC1120CC1190EnterIdle(void)
{
/* wait until chip is ready */
TRXEM_SPI_BEGIN();
while(TRXEM_PORT_IN & TRXEM_SPI_MISO_PIN);
cc1120cc1190RxIdle();
cc1120cc1190RadioTxRx = CC112X_STATE_IDLE;
return;
}
/******************************************************************************
* @fn perCC115LEnterIdle
*
* @brief Enters IDLE from ANY state. Function is used to abstract the
* cc11xLRadioTxIdle functionality away from the lower-level radio
* interface.
*
* input parameters
*
* @param none
*
* output parameters
*
* @return void
*/
void perCC115LEnterIdle(void)
{
/* wait until chip is ready */
TRXEM_SPI_BEGIN();
while(TRXEM_PORT_IN & TRXEM_SPI_MISO_PIN);
cc115LTxIdle();
cc115LRadioTxIdle = CC115L_STATE_IDLE;
return;
}
/*******************************************************************************
* @fn trxSpiCmdStrobe
*
* @brief Send command strobe to the radio. Returns status byte read
* during transfer of command strobe. Validation of provided
* is not done. Function assumes chip is ready.
*
* input parameters
*
* @param cmd - command strobe
*
* output parameters
*
* @return status byte
*/
rfStatus_t trxSpiCmdStrobe(uint8 cmd)
{
uint8 rc;
TRXEM_SPI_BEGIN();
while(TRXEM_PORT_IN & TRXEM_SPI_MISO_PIN);
TRXEM_SPI_TX(cmd);
TRXEM_SPI_WAIT_DONE();
rc = TRXEM_SPI_RX();
TRXEM_SPI_END();
return(rc);
}
/*******************************************************************************
* @fn trx8BitRegAccess
*
* @brief This function performs a read or write from/to a 8bit register
* address space. The function handles burst and single read/write
* as specfied in addrByte. Function assumes that chip is ready.
*
* input parameters
*
* @param accessType - Specifies if this is a read or write and if it's
* a single or burst access. Bitmask made up of
* RADIO_BURST_ACCESS/RADIO_SINGLE_ACCESS/
* RADIO_WRITE_ACCESS/RADIO_READ_ACCESS.
* @param addrByte - address byte of register.
* @param pData - data array
* @param len - Length of array to be read(TX)/written(RX)
*
* output parameters
*
* @return chip status
*/
rfStatus_t trx8BitRegAccess(uint8 accessType, uint8 addrByte, uint8 *pData, uint16 len)
{
uint8 readValue;
/* Pull CS_N low and wait for SO to go low before communication starts */
TRXEM_SPI_BEGIN();
while(TRXEM_PORT_IN & TRXEM_SPI_MISO_PIN);
/* send register address byte */
TRXEM_SPI_TX(accessType|addrByte);
TRXEM_SPI_WAIT_DONE();
/* Storing chip status */
readValue = TRXEM_SPI_RX();
trxReadWriteBurstSingle(accessType|addrByte,pData,len);
TRXEM_SPI_END();
/* return the status byte value */
return(readValue);
}
/******************************************************************************
* @fn trx16BitRegAccess
*
* @brief This function performs a read or write in the extended adress
* space of CC112X.
*
* input parameters
*
* @param accessType - Specifies if this is a read or write and if it's
* a single or burst access. Bitmask made up of
* RADIO_BURST_ACCESS/RADIO_SINGLE_ACCESS/
* RADIO_WRITE_ACCESS/RADIO_READ_ACCESS.
* @param extAddr - Extended register space address = 0x2F.
* @param regAddr - Register address in the extended address space.
* @param *pData - Pointer to data array for communication
* @param len - Length of bytes to be read/written from/to radio
*
* output parameters
*
* @return rfStatus_t
*/
rfStatus_t trx16BitRegAccess(uint8 accessType, uint8 extAddr, uint8 regAddr, uint8 *pData, uint8 len)
{
uint8 readValue;
TRXEM_SPI_BEGIN();
while(TRXEM_PORT_IN & TRXEM_SPI_MISO_PIN);
/* send extended address byte with access type bits set */
TRXEM_SPI_TX(accessType|extAddr);
TRXEM_SPI_WAIT_DONE();
/* Storing chip status */
readValue = TRXEM_SPI_RX();
TRXEM_SPI_TX(regAddr);
TRXEM_SPI_WAIT_DONE();
/* Communicate len number of bytes */
trxReadWriteBurstSingle(accessType|extAddr,pData,len);
TRXEM_SPI_END();
/* return the status byte value */
return(readValue);
}
/******************************************************************************
* @fn chipDetectRadio()
*
* @brief This function detects if a chip is present on the EM
* socket. SPI initialization must be done before this function
* can be called.
* Note: Currently able to detect CC1101, CC110L, CC113L, CC115L, CC2500
*
* input parameters
*
* @param pRadioChipType - pointer to radioChipType_t struct
*
* output parameters
*
* @return 2 byte chip type
*/
static uint16 trxChipDetectRadio(radioChipType_t *pRadioChipType)
{
volatile uint8 id;
volatile uint8 ver;
volatile uint16 type;
// Relies on automatic POR
// Pull CSn low and wait for MISO goes low => clock ready
TRXEM_SPI_BEGIN();
TRXEM_SPI_WAIT_MISO_LOW(id); // Wait for MISO Low
if(id == 0) return CHIP_TYPE_NONE; // Return if failed
TRXEM_SPI_TX(CC1101_READ_BURST | CC1101_PARTNUM_ADDR); // [7:6] = READ_BURST, [5:0] = part number address
TRXEM_SPI_WAIT_DONE();
TRXEM_SPI_TX(0x00);
TRXEM_SPI_WAIT_DONE();
id = TRXEM_SPI_RX();
TRXEM_SPI_TX(CC1101_READ_BURST | CC1101_VERSION_ADDR); // [7:0] = ADDR
TRXEM_SPI_WAIT_DONE();
TRXEM_SPI_TX(0x00);
TRXEM_SPI_WAIT_DONE();
ver = TRXEM_SPI_RX();
TRXEM_SPI_END();
if(id == 0x00 )
{
switch(ver)
{
case 0x04:
type = CHIP_TYPE_CC1101;
break;
case 0x07:
type = CHIP_TYPE_CC110L;
break;
case 0x08:
type = CHIP_TYPE_CC113L;
break;
case 0x09:
type = CHIP_TYPE_CC115L;
break;
default:
type = CHIP_TYPE_NONE;
}
}
else if(id == 0x80 )
{
switch(ver)
{
case 0x03:
type = CHIP_TYPE_CC2500;
break;
default:
type = CHIP_TYPE_NONE;
}
}
else
{
type = CHIP_TYPE_NONE;
}
// Populating the global radio device struct if specific radio was detected
if(type != CHIP_TYPE_NONE)
{
pRadioChipType->id = id;
pRadioChipType->ver = ver;
pRadioChipType->deviceName = type;
}
return type;
}
/******************************************************************************
* @fn trxChipDetectCC112x()
*
* @brief This function detects if a CC112x chip is present in the EM
* socket. SPI initialization must be ensured before this function
* can be called.
*
* input parameters
*
* @param pRadioChipType - pointer to radioChipType_t struct
*
* output parameters
*
* @return 2 byte chip type
*/
static uint16 trxChipDetectCC112x(radioChipType_t *pRadioChipType)
{
volatile uint8 id;
volatile uint8 ver;
volatile uint16 type;
// Pin reset
RF_RESET_N_PORT_SEL &= ~RF_RESET_N_PIN;
RF_RESET_N_PORT_DIR |= RF_RESET_N_PIN;
RF_RESET_N_PORT_OUT &= ~RF_RESET_N_PIN; // keep reset pin low
__delay_cycles(1000000);
RF_RESET_N_PORT_OUT |= RF_RESET_N_PIN; // Release reset
// Pull CSn low and wait for MISO goes low => clock ready
TRXEM_SPI_BEGIN();
TRXEM_SPI_WAIT_MISO_LOW(id); // Wait for MISO Low
if(id == 0) return CHIP_TYPE_NONE; // Return if failed
TRXEM_SPI_TX(CC1120_READ_BURST | CC1120_EXT_MEM_ACCESS); // [7:6] = READ_BURST, [5:0] = extended memory access address
TRXEM_SPI_WAIT_DONE();
TRXEM_SPI_TX(CC1120_PARTNUMBER_ADDR); // [7:0] = Partnumber address
TRXEM_SPI_WAIT_DONE();
TRXEM_SPI_TX(0x00);
TRXEM_SPI_WAIT_DONE();
id = TRXEM_SPI_RX();
TRXEM_SPI_TX(0x00);
TRXEM_SPI_WAIT_DONE();
ver = TRXEM_SPI_RX();
TRXEM_SPI_END();
switch(id)
{
case 0x40: //CC1121
type = CHIP_TYPE_CC1121;
break;
case 0x48: // CC1120
type = CHIP_TYPE_CC1120;
break;
case 0x58: //CC1125
type = CHIP_TYPE_CC1125;
break;
case 0x5A: //CC1175
type = CHIP_TYPE_CC1175;
break;
case 0x20://CC1200
type = CHIP_TYPE_CC1200;
break;
case 0x21://CC1201
type = CHIP_TYPE_CC1201;
break;
default:
type = CHIP_TYPE_NONE;
}
// Populating the global radio device struct if specific radio was detected
if(type != CHIP_TYPE_NONE)
{
pRadioChipType->id = id;
pRadioChipType->ver = ver;
pRadioChipType->deviceName = type;
}
return type;
}