Hi,
I have two LDC1000 chips in my system. But for now I am using only one of them, which gets selected by chip select
. I am not using any interrupt vector. After Initialization, I am getting 0000 on reading data registers 0x21-0x25. Can anyone please tell me what am I missing? Following are the details of my program:
Initializing LDC1000 with following values:
LDC1000_CMD_RPMAX: 0x12
LDC1000_CMD_RPMIN: 0x0A
LDC1000_CMD_SENSORFREQ: 0x94
LDC1000_CMD_LDCCONFIG: 0x17
LDC1000_CMD_CLKCONFIG: 0x00
LDC1000_CMD_INTCONFIG: 0x02
LDC1000_CMD_THRESHILSB: 0x50
LDC1000_CMD_THRESHIMSB: 0x14
LDC1000_CMD_THRESLOLSB: 0xC0
LDC1000_CMD_THRESLOMSB: 0x12
LDC1000_CMD_PWRCONFIG: 0x01
int main(void)
{
uint8_t data[4]; // data buffer
uint16_t proxData; // data to print
uint16_t freqData; // data to print
WDTCTL = WDTPW+WDTHOLD; // Stop watchdog timer
SCFQCTL |= 0x3F; // N = 63, DCO freq = 32.768 * (63+1)=2MHz
SCFI0 &= ~0x40; // D = 1, DCO Freq = 32.768 * (63+1) * 1 = 2.097 Mhz. Range is 0.65 to 6.1 MHz
FLL_CTL0 |= XCAP14PF; // Configure load caps for 32K Crystal
FLL_CTL0 &= ~0x80; //DCO Output is divided
FLL_CTL1 &= ~0x44; // SMCLK 0n and SMCLK = DCO
// initialize LDC1000
evm_init(); // Outputs SMCLK to LDCLK, Inits LDC1000
// set EVM_INT pin to DRDY function
spi_writeByte(NULL, LDC1000_CMD_INTCONFIG, 0x04);
while(1){
spi_readBytes(NULL, LDC1000_CMD_PROXLSB, data, sizeof(data));
proxData = data[0] | (data[1] << 8); // buffer proximity data
freqData = data[2] | (data[3] << 8); // buffer frequency counter data
printf("%d,%d\r\n",proxData,freqData); // print data
}
}
