/**
* @brief Stops audio Codec playing. It powers down the codec.
* @param CodecPdwnMode: selects the power down mode.
* @arg CODEC_PDWN_SW: only mutes the audio codec. When resuming from this
* mode the codec keeps the prvious initialization (no need to re-Initialize
* the codec registers).
* @arg CODEC_PDWN_HW: Physically power down the codec. When resuming from this
* mode, the codec is set to default configuration (user should re-Initialize
* the codec in order to play again the audio stream).
* @retval o if correct communication, else wrong communication
*/
uint32_t Codec_Stop(uint32_t CodecPdwnMode)
{
uint32_t counter = 0;
/* Mute the output first */
Codec_Mute(AUDIO_MUTE_ON);
if (CodecPdwnMode == CODEC_PDWN_SW)
{
/* Power down the DAC and the speaker (PMDAC and PMSPK bits)*/
counter += Codec_WriteRegister(0x02, 0x9F);
}
else /* CODEC_PDWN_HW */
{
/* Power down the DAC components */
counter += Codec_WriteRegister(0x02, 0x9F);
/* Wait at least 100ms */
Delay(0xFFF);
/* Reset The pin */
IOE_WriteIOPin(AUDIO_RESET_PIN, BitReset);
}
return counter;
}
/*******************************************************************************
* Function Name : CODEC_PowerDown
* Description : Power down the Audio Codec.
* Input : - CodecPowerDown_Mode: could be CodecPowerDown_SW for software
* power down (by register writing), CodecPowerDown_HW just shut
* down the codec physically.
* Output : None
* Return : None
*******************************************************************************/
void CODEC_PowerDown(uint32_t CodecPowerDown_Mode)
{
if (CodecPowerDown_Mode == CodecPowerDown_SW)
{
/* Power down the DAC and the speaker (PMDAC and PMSPK bits)*/
CODEC_WriteRegister(0x02, 0x9F);
}
else /* CodecPowerDown_HW */
{
/* Mute the output first */
CODEC_WriteRegister(0x1A, 0x80);
CODEC_WriteRegister(0x1B, 0x80);
/* Power down the DAC components */
CODEC_WriteRegister(0x02, 0x9F);
/* Wait at least 100µs */
CODEC_Delay(0xFFF);
/* Reset The pin */
IOE_WriteIOPin(AUDIO_RESET_PIN, BitReset);
}
}
/**
* @brief Initializes and Configures the two IO_Expanders Functionalities
* (IOs, Touch Screen ..) and configures all STM3210C-EVAL necessary
* hardware (GPIOs, APB clocks ..).
* @param None
* @retval IOE_OK if all initializations done correctly. Other value if error.
*/
uint8_t IOE_Config(void)
{
/* Configure the needed pins */
IOE_GPIO_Config();
/* Configure the I2C peripheral */
IOE_I2C_Config();
/* Read IO Expander 1 ID */
if(IOE_IsOperational(IOE_1_ADDR))
{
return IOE1_NOT_OPERATIONAL;
}
if(IOE_IsOperational(IOE_2_ADDR))
{
return IOE2_NOT_OPERATIONAL;
}
/* Generate IOExpander Software reset */
IOE_Reset(IOE_1_ADDR);
IOE_Reset(IOE_2_ADDR);
/* ---------------------- IO Expander 1 configuration --------------------- */
/* Enable the GPIO, Touch Screen and ADC functionalities */
IOE_FnctCmd(IOE_1_ADDR, IOE_IO_FCT | IOE_TS_FCT | IOE_ADC_FCT, ENABLE);
/* Configure the VBAT pin in output mode pin*/
IOE_IOPinConfig(IOE_1_ADDR, VBAT_DIV_PIN , Direction_OUT);
/* ENABLE the alternate function for IN1 pin */
IOE_IOAFConfig(IOE_1_ADDR, VBAT_DIV_PIN, ENABLE);
/* Apply the default state for the out pins */
IOE_WriteIOPin(VBAT_DIV_PIN, BitReset);
/* Configure the MEMS interrupt pins in Input mode */
IOE_IOPinConfig(IOE_2_ADDR, (uint32_t)(MEMS_INT1_PIN | MEMS_INT2_PIN), Direction_IN);
/* ENABLE the alternate function for the Joystick pins */
IOE_IOAFConfig(IOE_2_ADDR, (uint32_t)(MEMS_INT1_PIN | MEMS_INT2_PIN), ENABLE);
/* Configure the IOs to detect Falling and Rising Edges */
IOE_IOEdgeConfig(IOE_2_ADDR, (uint32_t)(MEMS_INT1_PIN | MEMS_INT2_PIN), (uint32_t)(EDGE_FALLING | EDGE_RISING));
/* Touch Screen controller configuration */
IOE_TS_Config();
/* ------------------------------------------------------------------------ */
/* ---------------------- IO Expander 2 configuration --------------------- */
/* Enable the GPIO, Temperature Sensor and ADC functionalities */
IOE_FnctCmd(IOE_2_ADDR, IOE_IO_FCT | IOE_TEMPSENS_FCT | IOE_ADC_FCT, ENABLE);
/* Configure the Audio Codec Reset pin in output mode pin*/
IOE_IOPinConfig(IOE_2_ADDR, (uint32_t)(AUDIO_RESET_PIN), Direction_OUT);
IOE_IOPinConfig(IOE_2_ADDR, (uint32_t)(MII_INT_PIN), Direction_IN);
/* ENABLE the alternate function for IN1 pin */
IOE_IOAFConfig(IOE_2_ADDR, (uint32_t)(AUDIO_RESET_PIN | MII_INT_PIN), ENABLE);
/* Apply the default state for the out pins */
IOE_WriteIOPin(AUDIO_RESET_PIN, BitReset);
IOE_WriteIOPin(MII_INT_PIN, BitReset);
/* Configure the Joystick pins in Input mode */
IOE_IOPinConfig(IOE_2_ADDR, JOY_IO_PINS , Direction_IN);
/* ENABLE the alternate function for the Joystick pins */
IOE_IOAFConfig(IOE_2_ADDR, JOY_IO_PINS, ENABLE);
/* Configure the IOs to detect Falling and Rising Edges */
IOE_IOEdgeConfig(IOE_2_ADDR, JOY_IO_PINS, (uint8_t)(EDGE_FALLING | EDGE_RISING));
/* Temperature Sensor module configuration */
IOE_TempSens_Config();
/* ------------------------------------------------------------------------ */
/* Configuration is OK */
return IOE_OK;
}
