aic3204 beep not working

james conway

Hi,

I'm not able to get the beep generator working. The aic is configured for DAC Fs of 8000 samp/sec. I can play speech to the speaker just fin, but beep generator does not play a tone. In the aic3204 configuration, I set register 60 (DAC processing block) to 0x19 which should have enabled DAC processing block 25. Here is the code I use to setup and enabled the beep generator. Any help would be greatly appreciated.

Thanks,

Jim

#define SIN_700_Q15             17121   // sin(2PI * 700/8000) * 32767
#define COS_700_Q15             27939   // cos(2PI * 700/8000) * 32767
#define TONE_GAIN_DB            6       // register value (0 ... 63) == gain of: (0 dB ... -63 dB)
#define TONE_DURATION_SECS      20ul
void aic3204_tonegen () {
Uint16 val;
Int16 hi, lo;
Uint32 samps;

    val = (TONE_GAIN_DB & 0x3F);
    AIC3204_rset( 0, 0x00);    // Select page 0

    AIC3204_rset( 71, val); // set left channel volume and disable the generator
    AIC3204_rset( 72, val); // set right channel volume

    samps = TONE_DURATION_SECS * 8000ul; // DAC Fs == 8000 samp/sec

    // sample length bits 23:16
    val = (samps >> 16) & 0xFF;
    AIC3204_rset( 73, val);

    // sample length bits 15:8
    val = (samps >> 8) & 0xFF;
    AIC3204_rset( 74, val);

    // sample length bits 7:0
    val = samps & 0xFF;
    AIC3204_rset( 75, val);

    // sin (x)
    val = SIN_700_Q15;
    hi = (val >> 8) & 0xFF;
    lo = val & 0xFF;
    AIC3204_rset( 76, hi);
    AIC3204_rset( 77, lo);

    // cos (x)
    val = COS_700_Q15;
    hi = (val >> 8) & 0xFF;
    lo = val & 0xFF;
    AIC3204_rset( 78, hi);
    AIC3204_rset( 79, lo);

    // enable the generator
    val = (TONE_GAIN_DB & 0x3F) | 0x80;
    AIC3204_rset( 71, val);
}

over 9 years ago

0 J- over 9 years ago

TI__Mastermind 46195 points

Hi,

Here is an example on how to get the tone generator working with the EVM:

Initialization:

###############################################
# Software Reset
###############################################
#
# Select Page 0
w 30 00 00
#
# Initialize the device through software reset
w 30 01 01
#
###############################################



###############################################
# Clock and Interface Settings
# ---------------------------------------------
# The codec receives: MCLK = 11.2896 MHz,
# BLCK = 2.8224 MHz, WCLK = 44.1 kHz
###############################################
#
# Select Page 0
w 30 00 00
#
# PLL_clkin = MCLK, codec_clkin = PLL_CLK,
# PLL on, P=1, R=1, J=8, D=0000
w 30 04 03 91 08 00 00
#
# NDAC = 2, MDAC = 8, dividers powered on
w 30 0b 82 88
#
# DOSR = 128
w 30 0D 00 80
#
# NADC = 2, MADC = 8, dividers powered on
w 30 12 82 88
#
# AOSR = 128
w 30 14 80
#
###############################################



###############################################
# Configure Processing Blocks
###############################################
#
# Select Page 0
w 30 00 00
#
# PRB_P25 selected
w 30 3C 19
#
# Select Page 44, Enable Adaptive filtering for DAC
w 30 00 2c 04
#
###############################################



###############################################
# Configure Power Supplies
###############################################
#
# Select Page 1
w 30 00 01
#
# Disable weak AVDD in presence of external
# AVDD supply
w 30 01 08
#
# Enable Master Analog Power Control
w 30 02 00
#
# Set the input power-up time to 3.1ms (for ADC)
w 30 47 32
#
# Set the REF charging time to 40ms
w 30 7b 01
#
###############################################



###############################################
# Playback Setup
###############################################
#
# Select Page 1
w 30 00 01
#
# De-pop
w 30 14 25
#
# Route LDAC/RDAC to HPL/HPR
w 30 0c 08 08
#
# Route LDAC/RDAC to LOL/LOR
w 30 0e 08 08
#
# Power up HPL/HPR and LOL/LOR drivers
w 30 09 3C
#
# Unmute HPL/HPR driver, 0dB Gain
w 30 10 00 00
#
# Unmute LOL/LOR driver, 0dB Gain
w 30 12 00 00
#
# Select Page 0
w 30 00 00
#
# DAC => 0dB
w 30 41 00 00
#
# Power up LDAC/RDAC
w 30 3f d6
#
# Unmute LDAC/RDAC
w 30 40 00
#
###############################################



##########################
# BEEP GENERATOR SETTINGS
##########################

# Select Page 0
w 30 00 00
# Gain = -40dB
w 30 47 28 28

How to issue a beep:

w 30 00 00              # Page 0
w 30 40 0C              # Mute DACs
f 30 26 xxx1xxx1        # Wait for mute flag
w 30 0B 02              # Turn off NDAC
w 30 47 8C              # Beep!
w 30 0B 82              # Turn on NDAC
w 30 40 00              # Un-mute DACs
f 30 47 0xxxxxxx        # Wait for beep to finish

Here is some information on how to calculate the frequency of the tone, etc:

www.ti.com/.../slaa446

Regards,

J-

Audio

Audio forum

aic3204 beep not working