/*!
* @brief Main function
*/
void test_audio(void) {
if(!yesno("Audio?")) return;
const gpio_pin_config_t OUTFALSE = {kGPIO_DigitalOutput, 0};
CLOCK_EnableClock(kCLOCK_PortC);
PORT_SetPinMux(PORTC, 12U, kPORT_MuxAsGpio);
PORT_SetPinMux(PORTC, 13U, kPORT_MuxAsGpio);
GPIO_PinInit(GPIOC, 12U, &OUTFALSE);
GPIO_PinInit(GPIOC, 13U, &OUTFALSE);
GPIO_WritePinOutput(GPIOC, 12, true);
GPIO_WritePinOutput(GPIOC, 13, true);
i2c_init(&i2c_config_default);
uint8_t cmd[1] = {0b00001111};
send_cmd(cmd, sizeof(cmd));
GPIO_WritePinOutput(GPIOC, 12, false);
PORT_SetPinMux(PORTC, 9U, kPORT_MuxAlt3);
ftm_config_t ftmInfo;
uint8_t updatedDutycycle = 100U;
ftm_chnl_pwm_signal_param_t ftmParam[2];
/* Configure ftm params with frequency 24kHZ */
ftmParam[0].chnlNumber = (ftm_chnl_t) BOARD_SECOND_FTM_CHANNEL;
ftmParam[0].level = kFTM_LowTrue;
ftmParam[0].dutyCyclePercent = 0U;
ftmParam[0].firstEdgeDelayPercent = 0U;
FTM_GetDefaultConfig(&ftmInfo);
FTM_Init(BOARD_FTM_BASEADDR, &ftmInfo);
FTM_SetupPwm(BOARD_FTM_BASEADDR, ftmParam, 1U, kFTM_EdgeAlignedPwm, 1000000, FTM_SOURCE_CLOCK);
FTM_StartTimer(BOARD_FTM_BASEADDR, kFTM_SystemClock);
FTM_UpdatePwmDutycycle(BOARD_FTM_BASEADDR, (ftm_chnl_t) BOARD_SECOND_FTM_CHANNEL, kFTM_EdgeAlignedPwm,
updatedDutycycle);
int idx = 0;
int cnt = 0;
while (1) {
if(cnt++ % 100 == 0) {
uint8_t duty_cycle = (uint8_t) abs((sin(idx++ * 3.14159265358979f / 180) * 100.0));
if (idx > 360) idx = 0;
FTM_UpdatePwmDutycycle(BOARD_FTM_BASEADDR, (ftm_chnl_t) BOARD_SECOND_FTM_CHANNEL, kFTM_EdgeAlignedPwm,
(uint8_t) (duty_cycle++ % 100));
/* Software trigger to update registers */
FTM_SetSoftwareTrigger(BOARD_FTM_BASEADDR, true);
}
}
}
void PWM_Init(uint8_t instance)
{
#if FSL_FEATURE_SOC_FTM_COUNT
ftm_config_t config;
FTM_GetDefaultConfig(&config);
FTM_Init(mFtmBase[instance], &config);
/* Enable TPM compatibility. Free running counter and synchronization compatible with TPM */
mFtmBase[instance]->MODE &= ~(FTM_MODE_FTMEN_MASK);
FTM_StartTimer(mFtmBase[instance], kFTM_SystemClock);
#else
tpm_config_t config;
TPM_GetDefaultConfig(&config);
TPM_Init(mTpmBase[instance], &config);
TPM_StartTimer(mTpmBase[instance], kTPM_SystemClock);
#endif
}