I am using st25dv04k. when i am using NFC_IO_WriteReg16() it return error no 6.
when i am using it print below message:
NFC_IO_WriteReg16(ae,0,7edbfb66,1)
Error -6 while writing @0 (devAddr=AE)
How to resolve this issue ?
int32_t NFC_IO_ReadReg16(uint16_t DevAddr, uint16_t Reg, uint8_t *pData, uint16_t Length)
{
int8_t ret = -8;
uint8_t regAddr[2];
regAddr[0] = Reg>>8;
regAddr[1] = Reg & 0xFF;
#ifdef ST25DVI2C_DBG_ENABLE
printf("NFC_IO_ReadReg16(%x,%x,%x,%d)\r\n",DevAddr,Reg,pData,Length);
#endif
struct i2c_msg messages[2] = {
{
.addr = DevAddr >>1,
.buf = regAddr,
.len = 2,
.flags = 0,
},
{
.addr = DevAddr >>1,
.buf = pData,
.len = Length,
.flags = I2C_M_RD | I2C_M_NOSTART,
}
};
struct i2c_rdwr_ioctl_data payload = {
.msgs = messages,
.nmsgs = 2,
};
ret = ioctl(filehandle, I2C_RDWR, &payload);
if (ret < 0) {
ret = -errno;
printf("\r\nError %d while reading @%X (devAddr=%X)\r\n", ret,Reg,DevAddr);
return ret;
}
/* todo check return status for nack detection */
/* return NFC_I2C_ERROR_NACK; */
#ifdef ST25DVI2C_DBG_ENABLE
printf("NFC_IO_ReadReg16 OK\r\n");
for (int i = 0 ; i < Length ; i++)
printf("%x ",pData[i]);
printf("\n");
#endif
return NFC_I2C_STATUS_SUCCESS;
}
