/* Configure I2S for Audio Format input */
Status Chip_I2S_RxConfig(LPC_I2S_T *pI2S, I2S_AUDIO_FORMAT_T *format)
{
uint32_t temp;
uint16_t xDiv, yDiv;
uint32_t N;
if (getClkDiv(pI2S, format, &xDiv, &yDiv, &N) == ERROR) {
return ERROR;
}
temp = pI2S->DAI & (~(I2S_DAI_WORDWIDTH_MASK | I2S_DAI_MONO | I2S_DAI_SLAVE | I2S_DAI_WS_HALFPERIOD_MASK));
if (format->WordWidth <= 8) {
temp |= I2S_WORDWIDTH_8;
}
else if (format->WordWidth <= 16) {
temp |= I2S_WORDWIDTH_16;
}
else {
temp |= I2S_WORDWIDTH_32;
}
temp |= (format->ChannelNumber) == 1 ? I2S_MONO : I2S_STEREO;
temp |= I2S_MASTER_MODE;
temp |= I2S_DAI_WS_HALFPERIOD(format->WordWidth - 1);
pI2S->DAI = temp;
pI2S->RXMODE = I2S_RXMODE_CLKSEL(0);
pI2S->RXBITRATE = N - 1;
pI2S->RXRATE = yDiv | (xDiv << 8);
return SUCCESS;
}
/* Initialize the ADC peripheral and the ADC setup structure to default value */
void Chip_ADC_Init(LPC_ADC_T *pADC, ADC_CLOCK_SETUP_T *ADCSetup)
{
uint8_t div;
uint32_t cr = 0;
uint32_t clk;
Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_ADC);
#if defined(ADC_TRIM_SUPPORT)
pADC->ADTRM = 0xF00;
#endif
pADC->INTEN = 0; /* Disable all interrupts */
cr |= ADC_CR_PDN;
ADCSetup->adcRate = ADC_MAX_SAMPLE_RATE;
ADCSetup->bitsAccuracy = 0; /* LPC17xx/40xx doesn't support this setting */
clk = 0;
ADCSetup->burstMode = false;
div = getClkDiv(pADC, false, ADCSetup->adcRate, clk);
cr |= ADC_CR_CLKDIV(div);
#if !defined(ADC_ACC_12BITS)
cr |= ADC_CR_BITACC(ADCSetup->bitsAccuracy);
#endif /*defined(ADC_ACC_12BITS)*/
pADC->CR = cr;
}
/* Set the ADC Sample rate */
void Chip_ADC_SetSampleRate(LPC_ADC_T *pADC, ADC_CLOCK_SETUP_T *ADCSetup, uint32_t rate)
{
uint8_t div;
uint32_t cr;
cr = pADC->CR & (~ADC_SAMPLE_RATE_CONFIG_MASK);
ADCSetup->adcRate = rate;
div = getClkDiv(pADC, ADCSetup->burstMode, rate, (11 - ADCSetup->bitsAccuracy));
cr |= ADC_CR_CLKDIV(div);
cr |= ADC_CR_BITACC(ADCSetup->bitsAccuracy);
pADC->CR = cr;
}
/* Initialize the ADC peripheral and the ADC setup structure to default value */
void Chip_ADC_Init(LPC_ADC_T *pADC, ADC_CLOCK_SETUP_T *ADCSetup)
{
uint8_t div;
uint32_t cr = 0;
uint32_t clk;
Chip_Clock_EnableOpts(Chip_ADC_GetClockIndex(pADC), true, true, 1);
pADC->INTEN = 0; /* Disable all interrupts */
cr |= ADC_CR_PDN;
ADCSetup->adcRate = ADC_MAX_SAMPLE_RATE;
ADCSetup->bitsAccuracy = ADC_10BITS;
clk = 11;
ADCSetup->burstMode = false;
div = getClkDiv(pADC, false, ADCSetup->adcRate, clk);
cr |= ADC_CR_CLKDIV(div);
cr |= ADC_CR_BITACC(ADCSetup->bitsAccuracy);
pADC->CR = cr;
}
/* Initialize the ADC peripheral and the ADC setup structure to default value */
void Chip_ADC_Init(LPC_ADC_T *pADC, ADC_CLOCK_SETUP_T *ADCSetup)
{
uint8_t div;
uint32_t cr = 0;
uint32_t clk;
Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_ADC_PD);
Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_ADC);
pADC->INTEN = 0; /* Disable all interrupts */
cr |= ADC_CR_PDN;
ADCSetup->adcRate = ADC_MAX_SAMPLE_RATE;
ADCSetup->bitsAccuracy = ADC_10BITS;
clk = 11;
ADCSetup->burstMode = false;
div = getClkDiv(pADC, false, ADCSetup->adcRate, clk);
cr |= ADC_CR_CLKDIV(div);
cr |= ADC_CR_BITACC(ADCSetup->bitsAccuracy);
pADC->CR = cr;
}
