michael hollegha
More readable TLV320 Lib
Diff: TLV320HL.cpp
- Revision:
- 0:808bb0b9cf45
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/TLV320HL.cpp Wed Oct 22 09:23:47 2014 +0000
@@ -0,0 +1,230 @@
+
+#include "mbed.h"
+#include "TLV320HL.h"
+
+
+TLV320::TLV320(PinName sda, PinName scl, int addr, I2SSlave* aI2S)
+: mAddr(addr), mI2c_(sda, scl)
+{
+ mI2S = aI2S;
+}
+
+void TLV320::Init(int aFrequ)
+{
+ mI2c_.frequency(100000);
+ reset(); //TLV resets
+ wait_ms(100);
+ power(true);
+ // power(0x07); Power Up the TLV320, but not the MIC, ADC and LINE
+ format(16, STEREO); //16Bit I2S protocol format, STEREO
+ frequency(aFrequ); //Default sample frequency is 44.1kHz
+ bypass(false); //Do not bypass device
+ mute(false); //Not muted
+ activateDigitalInterface_(); //The digital part of the chip is active
+ // outputVolume(0.7, 0.7); //Headphone volume to the default state
+ inputVolume(1,1);
+ outputVolume(0.92,0.92);
+}
+
+
+// Returns: int 0 (success), -1 (value out of range)
+int TLV320::inputVolume(float leftVolumeIn, float rightVolumeIn)
+{
+ //check values are in range
+ if((leftVolumeIn < 0.0)||leftVolumeIn > 1.0) return -1;
+ if((rightVolumeIn < 0.0)||rightVolumeIn > 1.0) return -1;
+ //convert float to encoded char
+ char left = (char)31*leftVolumeIn;
+ char right = (char)31*rightVolumeIn;
+ //Left Channel
+ cmd[1] = left | (0 << 7); //set volume
+ cmd[0] = LEFT_LINE_INPUT_CHANNEL_VOLUME_CONTROL; //set address
+ mI2c_.write(mAddr, cmd, 2); //send
+ //Right Channel
+ cmd[1] = right | (0 << 7); //set volume
+ cmd[0] = RIGHT_LINE_INPUT_CHANNEL_VOLUME_CONTROL; //set address
+ mI2c_.write(mAddr, cmd, 2); //send
+ return 0;
+}
+
+
+// Description: Set headphone (line out) volume for left an right channels
+// Returns: int 0 (success), -1 (value out of range)
+int TLV320::outputVolume(float leftVolumeOut, float rightVolumeOut)
+{
+ //check values are in range
+ if((leftVolumeOut < 0.0)||leftVolumeOut > 1.0) return -1;
+ if((rightVolumeOut < 0.0)||rightVolumeOut > 1.0) return -1;
+ //convert float to encoded char
+ char left = (char)(79*leftVolumeOut)+0x30;
+ char right = (char)(79*rightVolumeOut)+0x30;
+ //Left Channel
+ cmd[1] = left | (1 << 7); //set volume
+ cmd[0] = LEFT_CHANNEL_HEADPHONE_VOLUME_CONTROL; //set address
+ mI2c_.write(mAddr, cmd, 2); //send
+ //Right Channel
+ cmd[1] = right | (1 << 7); //set volume
+ cmd[0] = RIGHT_CHANNEL_HEADPHONE_VOLUME_CONTROL; //set address
+ mI2c_.write(mAddr, cmd, 2); //send
+ return 0;
+}
+
+
+// Description: Send TLV320 into bypass mode, i.e. connect input to output
+void TLV320::bypass(bool bypassVar)
+{
+ if(bypassVar == true)
+ cmd[1] = (1 << 3) | (0 << 4) | (0 << 5);//bypass enabled, DAC disabled, sidetone insertion disabled
+ else
+ cmd[1] = (0 << 3) | (1 << 4); //bypass disabled, DAC enabled
+ cmd[1] |= (0 << 2);
+ cmd[0] = ANALOG_AUDIO_PATH_CONTROL; //set address
+ mI2c_.write(mAddr, cmd, 2); //send
+}
+
+
+// Send TLV320 into mute mode
+void TLV320::mute(bool softMute)
+{
+ if(softMute == true) cmd[1] = 0x08; //set instruction to mute
+ else cmd[1] = 0x00; //set instruction to NOT mute
+ cmd[0] = DIGITAL_AUDIO_PATH_CONTROL; //set address
+ mI2c_.write(mAddr, cmd, 2); //send
+}
+
+
+// Switch TLV320 on/off
+void TLV320::power(bool powerUp)
+{
+ if(powerUp == true) cmd[1] = 0x00; //everything on
+ else cmd[1] = 0xFF; //everything off
+ cmd[0] = POWER_DOWN_CONTROL; //set address
+ mI2c_.write(mAddr, cmd, 2); //send
+}
+
+
+// Switch on individual devices on TLV320
+void TLV320::power(int device)
+{
+ cmd[1] = (char)device; //set user defined commands
+ cmd[0] = POWER_DOWN_CONTROL; //set address
+ mI2c_.write(mAddr, cmd, 2); //send
+}
+
+
+void TLV320::format(char length, bool mode)
+{
+ char modeSet = (1 << 6);
+ modeSet |= (1 << 5); //swap left and right channels
+ switch (length) //input data into instruction byte
+ {
+ case 16:
+ cmd[1] = modeSet | 0x02;
+ break;
+ case 20:
+ cmd[1] = modeSet | 0x06;
+ break;
+ case 24:
+ cmd[1] = modeSet | 0x0A;
+ break;
+ case 32:
+ cmd[1] = modeSet | 0x0E;
+ break;
+ default:
+ break;
+ }
+ mI2S->format(length, mode);
+ cmd[0] = DIGITAL_AUDIO_INTERFACE_FORMAT; //set address
+ mI2c_.write(mAddr, cmd, 2); //send
+}
+
+
+int TLV320::frequency(int hz)
+{
+ char rate;
+ switch(hz){
+ case 8000:
+ rate = 0x03;
+ break;
+ case 8021:
+ rate = 0x0B;
+ break;
+ case 32000:
+ rate = 0x06;
+ break;
+ case 44100:
+ rate = 0x08;
+ break;
+ case 48000:
+ rate = 0x00;
+ break;
+ case 88200:
+ rate = 0x0F;
+ break;
+ case 96000:
+ rate = 0x07;
+ break;
+ default:
+ return -1;
+ }
+ char clockInChar = (0 << 6);
+ // char clockModeChar = (1 << 0);
+ char clockModeChar = (0 << 0); // Kogler
+
+ cmd[1] = (rate << 2) | clockInChar | clockModeChar; //input data into instruciton byte
+ cmd[0] = SAMPLE_RATE_CONTROL; //set address
+ mI2c_.write(mAddr, cmd, 2); //send
+ return 0;
+}
+
+
+void TLV320::reset(void)
+{
+ cmd[0] = RESET_REGISTER; //set address
+ cmd[1] = 0x00; //this resets the entire device
+ mI2c_.write(mAddr, cmd, 2);
+}
+
+void TLV320::setSampleRate_(char rate, bool clockIn, bool clockMode, bool bOSR)
+{
+ char clockInChar;
+ char clockModeChar;
+ char baseOverSamplingRate;
+ if(bOSR){
+ baseOverSamplingRate = (1 << 0);
+ } else {
+ baseOverSamplingRate = (0 << 0);
+ }
+ if(clockIn){
+ clockInChar = (1 << 6);
+ } else {
+ clockInChar = (0 << 6);
+ }
+ if(clockMode){
+ clockModeChar = 0x01;
+ } else {
+ clockModeChar = 0x00;
+ }
+ cmd[1] = (rate << 2) | clockInChar | clockModeChar | baseOverSamplingRate; //input data into instruciton byte
+ cmd[0] = SAMPLE_RATE_CONTROL; // set address
+ mI2c_.write(mAddr, cmd, 2); // send
+}
+
+
+void TLV320::activateDigitalInterface_(void)
+{
+ cmd[1] = 0x01; //Activate
+ cmd[0] = DIGITAL_INTERFACE_ACTIVATION; //set address
+ mI2c_.write(mAddr, cmd, 2); //send
+}
+
+void TLV320::deactivateDigitalInterface_(void)
+{
+ cmd[1] = 0x00; //Deactivate
+ cmd[0] = DIGITAL_INTERFACE_ACTIVATION; //set address
+ mI2c_.write(mAddr, cmd, 2); //send
+}
+
+
+
+