/*! \brief Writes data to a register.
* \param reg Register index. Use the defines in this file.
* \param data Register data. Macros from this file can be used
* to ease writing to the bitfields.
*/
static void tpa6130_write_data(uint8_t reg, uint8_t data)
{
uint16_t message = (reg << 8) | data;
int twi_status;
twi_package_t twi_package =
{
.chip = TPA6130_TWI_ADDRESS,
.addr_length = 0,//AVR32_TWI_MMR_IADRSZ_NO_ADDR,
.buffer = &message,
.length = sizeof(message)
};
do
{
twi_status=twi_master_write(TPA6130_TWI, &twi_package);
}
while( twi_status != TWI_SUCCESS );
/* Save write value to shadow registers */
*(((uint8_t *) &tpa6130_shadow_regs) + reg - 1) = data;
}
/*! \brief Reads data from a register.
* The shadow parameter is used to specify if the data should be read
* from a driver internal register shadowing or directly from the device.
* \param reg Register index.
* \param shadow Read from device (shadow=false) or from shadowed register
* (shadow=true).
*/
static uint8_t tpa6130_read_data(uint8_t reg, bool shadow)
{
uint8_t data;
/*If we want to read from the shadowed registers */
if(shadow)
{
data = *((uint8_t *) &tpa6130_shadow_regs + reg - 1);
}
else
{
twi_package_t twi_package =
{
.chip = TPA6130_TWI_ADDRESS,
.addr_length = 1,//AVR32_TWI_MMR_IADRSZ_ONE_BYTE,
.addr[0] = reg,
.buffer = &data,
.length = sizeof(data)
};
twi_master_read(TPA6130_TWI, &twi_package);
}
//print_dbg("Read reg ");
//print_dbg_ulong(reg);
//print_dbg(" = 0x");
//print_dbg_hex(data);
//print_dbg("\n");
return data;
}
/*! \brief Probes and initializes the amplifier.
* Probes the TWI bus for the amplifier by using the slave address
* specified in the configuration (TPA6130_TWI_ADDRESS).
* If the device responds with an ACK the version register is read out
* and compared to the valid versions (TPA6130_VERSION).
* Last step is to set volume to 0, unmute and set the configuration
* specified in the conf_tpa6130.h file (stereo, mono ..).
*
* \returns A positive value upon success and a negative value upon failure.
*/
int8_t tpa6130_init(void)
{
/* Check if the device responds on the TWI bus*/
if(twi_probe(TPA6130_TWI, TPA6130_TWI_ADDRESS) != TWI_SUCCESS)
return TWI_NO_CHIP_FOUND;
/* If the device has no valid version we can not use it */
if(tpa6130_read_data(TPA6130_I2C_ADDRESS_VERSION, TWI_READ_HW)!= VERSION)
{
return -8;
}
/* un-mute the output channels, the volume is still 0 and
* should be increased by an application (fade-in/fade-out) */
tpa6130_write_data(TPA6130_VOLUME_AND_MUTE, tpa6130_shadow_regs.volume_and_mute);
/* set stereo/mono mode and enable both amplifiers (left/right) */
tpa6130_write_data(TPA6130_CONTROL,(TPA6130_MODE << 4) | HP_EN_L | HP_EN_R);
return TWI_SUCCESS;
}
/*! \brief Shuts down the amplifier and sets it into low power mode.
* This is the software low power mode described in the datasheet.
*/
void tpa6130_shutdown(void)
{
uint8_t data;
data = tpa6130_read_data(TPA6130_CONTROL, TWI_READ_HW);
tpa6130_write_data(TPA6130_CONTROL, data | SW_SHUTDOWN);
}
bool RTC_Init(unsigned long pba_hz)
{
// setup hardware for TWI
static const gpio_map_t TWI_GPIO_MAP =
{
{AVR32_TWI_SDA_0_0_PIN, AVR32_TWI_SDA_0_0_FUNCTION},
{AVR32_TWI_SCL_0_0_PIN, AVR32_TWI_SCL_0_0_FUNCTION}
};
gpio_enable_module(TWI_GPIO_MAP, sizeof(TWI_GPIO_MAP) / sizeof(TWI_GPIO_MAP[0]));
// set TWI options
twi_options_t twi_options=
{
.pba_hz=pba_hz,
.speed=100000,
.chip=0 // not used for master mode
};
twi_master_init(&AVR32_TWI, &twi_options);
if(twi_probe(&AVR32_TWI, RTC_SLAVE_ADDRESS)==TWI_SUCCESS)
{
return true;
}
else
{
return false;
}
}
/* Return the current time and put it in *TIMER if TIMER is not NULL. */
// declared in <time.h>
// reads the time from the RTC-chip via I2C (=TWI)
time_t time(time_t *__timer)
{
time_t t;
struct tm ts;
uint8_t b[7]={0};
twi_package_t twi_package=
{
.chip=RTC_SLAVE_ADDRESS,
.addr={0, 0, 0},
.addr_length=1,
.buffer=b,
.length=7
};
if(twi_master_read(&AVR32_TWI, &twi_package)!=TWI_SUCCESS)
{
printf("ERROR: could not read from real-time clock\n");
return 0;
}
ts.tm_sec = (((b[REG_Seconds]>>4) & 0x7)*10) + (b[REG_Seconds]&0xF);
ts.tm_min = (((b[REG_Minutes]>>4) & 0x7)*10) + (b[REG_Minutes]&0xF);
ts.tm_hour = (((b[REG_Hours] >>4) & 0x3)*10) + (b[REG_Hours] &0xF); // 24h format
// ts_wday must not be initialized!
ts.tm_mday = (((b[REG_Date] >>4) & 0x3)*10) + (b[REG_Date] &0xF);
ts.tm_mon = (((b[REG_Month]>>4) & 0x1)*10) + (b[REG_Month]&0xF) -1; // tm_mon=0..11
ts.tm_year = (int)((((b[REG_Year] >>4) & 0xF)*10) + (b[REG_Year] &0xF)) + 2000 -1900;
t = mktime(&ts);
if(__timer)
{
*__timer = t;
}
return t;
}
