/*!
* @brief Use FTM in PWM mode
*
* This function use PWM to controll brightness of a LED.
* LED is brighter and then dimmer, continuously.
*/
int main(void)
{
volatile uint32_t cnt = 0;
int32_t step = 1;
tpm_general_config_t driverInfo;
tpm_pwm_param_t param = {
.mode = kTpmEdgeAlignedPWM,
.edgeMode = kTpmHighTrue,
.uFrequencyHZ = 120000u,
.uDutyCyclePercent = 99u
};
// Init hardware
hardware_init();
// Print a note.
PRINTF("See the change of LED brightness \r\n");
// Prepare memory for initialization.
memset(&driverInfo, 0, sizeof(driverInfo));
// Init TPM.
TPM_DRV_Init(BOARD_TPM_INSTANCE, &driverInfo);
// Set clock for TPM.
TPM_DRV_SetClock(BOARD_TPM_INSTANCE, kTpmClockSourceModuleClk, kTpmDividedBy2);
while(1)
{
// Init PWM module with updated configuration.
TPM_DRV_PwmStart(BOARD_TPM_INSTANCE, ¶m, BOARD_TPM_CHANNEL);
// Delay a while to see LED.
for(cnt = 0; cnt < 200000u; cnt++)
{
__asm("nop");
}
// Change up or down direction of brightness.
if((param.uDutyCyclePercent >= 100) || (param.uDutyCyclePercent <= 0))
{
step *= -1;
}
// Update duty cycle.
param.uDutyCyclePercent += step;
}
}
void PIT_IRQHandler(void)
{
if (PIT_HAL_IsIntPending(g_pitBase[0], 0))
{
PIT_HAL_ClearIntFlag(g_pitBase[0], 0);
param.uFrequencyHZ = notes[beeps[position]];
position = (position + 1) % sizeof(beeps);
if (param.uFrequencyHZ)
TPM_DRV_PwmStart(0, ¶m, 3);
else
TPM_DRV_PwmStop(0, ¶m, 3);
}
if (PIT_HAL_IsIntPending(g_pitBase[0], 1))
{
PIT_HAL_ClearIntFlag(g_pitBase[0], 1);
}
}
/*FUNCTION**********************************************************************
*
* Function Name : SMARTCARD_DRV_InterfaceClockInit
* Description : This function initializes clock module used for card clock generation
*
*END**************************************************************************/
static uint16_t SMARTCARD_DRV_InterfaceClockInit(uint8_t clockModuleInstance, uint8_t clockModuleChannel, uint32_t cardClk)
{
#if defined(EMVSIM_INSTANCE_COUNT)
assert(clockModuleInstance < EMVSIM_INSTANCE_COUNT);
EMVSIM_Type * base = g_emvsimBase[clockModuleInstance];
uint32_t emvsimClkMhz = 0;
uint8_t emvsimPRSCValue;
/* Retrieve EMV SIM clock */
emvsimClkMhz = CLOCK_SYS_GetEmvsimFreq(clockModuleInstance)/1000000;
/* Calculate MOD value */
emvsimPRSCValue = (emvsimClkMhz*1000)/(cardClk/1000);
/* Set clock prescaler */
EMVSIM_HAL_SetClockPrescaler(base, emvsimPRSCValue);
/* Enable smart card clock */
EMVSIM_HAL_EnableCardClock(base);
return cardClk;
#elif defined(FTM_INSTANCE_COUNT)
assert(clockModuleInstance < FTM_INSTANCE_COUNT);
ftm_user_config_t ftmInfo;
uint32_t periph_clk_mhz = 0;
uint16_t ftmModValue;
FTM_Type * ftmBase = g_ftmBase[clockModuleInstance];
uint32_t chnlPairnum = FTM_HAL_GetChnPairIndex(clockModuleChannel);
/* Retrieve FTM system clock */
periph_clk_mhz = CLOCK_SYS_GetBusClockFreq()/1000000;
/* Calculate MOD value */
ftmModValue = ((periph_clk_mhz*1000/2)/(cardClk/1000)) -1;
/* Clear FTM driver user configuration */
memset(&ftmInfo, 0, sizeof(ftmInfo));
ftmInfo.BDMMode = kFtmBdmMode_11;
ftmInfo.syncMethod = kFtmUseSoftwareTrig;
/* Initialize FTM driver */
FTM_DRV_Init(clockModuleInstance, &ftmInfo);
/* Reset FTM prescaler to 'Divide by 1', i.e., to be same clock as peripheral clock */
FTM_HAL_SetClockPs(ftmBase, kFtmDividedBy1);
/* Disable FTM counter firstly */
FTM_HAL_SetClockSource(ftmBase, kClock_source_FTM_None);
/* Set initial counter value */
FTM_HAL_SetCounterInitVal(ftmBase, 0);
/* Set MOD value */
FTM_HAL_SetMod(ftmBase, ftmModValue);
/* Other initializations to defaults */
FTM_HAL_SetCpwms(ftmBase, 0);
FTM_HAL_SetDualChnCombineCmd(ftmBase, chnlPairnum, false);
FTM_HAL_SetDualEdgeCaptureCmd(ftmBase, chnlPairnum, false);
/* Configure mode to output compare, tougle output on match */
FTM_HAL_SetChnEdgeLevel(ftmBase, clockModuleChannel, kFtmToggleOnMatch);
FTM_HAL_SetChnMSnBAMode(ftmBase, clockModuleChannel, 1);
/* Configure a match value to toggle output at */
FTM_HAL_SetChnCountVal(ftmBase, clockModuleChannel, 1);
/* Set clock source to start the counter */
FTM_HAL_SetClockSource(ftmBase, kClock_source_FTM_SystemClk);
/* Re-calculate the actually configured smartcard clock and return to caller */
return (uint32_t)(((periph_clk_mhz*1000/2)/(FTM_HAL_GetMod(ftmBase)+1))*1000);
#elif defined(TPM_INSTANCE_COUNT)
assert(clockModuleInstance < TPM_INSTANCE_COUNT);
assert(clockModuleChannel < FSL_FEATURE_TPM_CHANNEL_COUNTn(clockModuleInstance));
/* Initialize TPM driver parameter */
tpm_pwm_param_t param = {
kTpmCenterAlignedPWM, /* mode */
kTpmHighTrue, /* edgeMode */
cardClk, /* uFrequencyHZ */
50 /* uDutyCyclePercent */
};
/* Initialize TPM driver */
tpm_general_config_t driverInfo;
memset(&driverInfo, 0, sizeof(driverInfo));
driverInfo.isDBGMode = true;
TPM_DRV_Init(clockModuleInstance, &driverInfo);
/* Set TPM clock source, the user will have to call the Clocking API's to set the
* TPM module clock before calling this function */
TPM_DRV_SetClock(clockModuleInstance, kTpmClockSourceModuleClk, kTpmDividedBy1);
/* Start TPM in PWM mode to generate smart card clock */
TPM_DRV_PwmStart(clockModuleInstance, ¶m, clockModuleChannel);
return cardClk;
#else
return 0;
#endif
}
/*!
* @brief Main demo function.
*/
int main (void)
{
tpm_general_config_t driverInfo;
accel_dev_t accDev;
accel_dev_interface_t accDevice;
accel_sensor_data_t accelData;
accel_i2c_interface_t i2cInterface;
tpm_pwm_param_t yAxisParams;
tpm_pwm_param_t xAxisParams;
int16_t xData, yData;
int16_t xAngle, yAngle;
xAxisParams.mode = kTpmEdgeAlignedPWM;
xAxisParams.edgeMode = kTpmHighTrue;
xAxisParams.uFrequencyHZ = 100000u;
xAxisParams.uDutyCyclePercent = 0u;
yAxisParams.mode = kTpmEdgeAlignedPWM;
yAxisParams.edgeMode = kTpmHighTrue;
yAxisParams.uFrequencyHZ = 100000u;
yAxisParams.uDutyCyclePercent = 0u;
// Register callback func for I2C
i2cInterface.i2c_init = I2C_DRV_MasterInit;
i2cInterface.i2c_read = I2C_DRV_MasterReceiveDataBlocking;
i2cInterface.i2c_write = I2C_DRV_MasterSendDataBlocking;
accDev.i2c = &i2cInterface;
accDev.accel = &accDevice;
accDev.slave.baudRate_kbps = BOARD_ACCEL_BAUDRATE;
accDev.slave.address = BOARD_ACCEL_ADDR;
accDev.bus = BOARD_ACCEL_I2C_INSTANCE;
// Initialize standard SDK demo application pins.
hardware_init();
// Accel device driver utilizes the OSA, so initialize it.
OSA_Init();
// Print the initial banner.
PRINTF("Bubble Level Demo!\r\n\r\n");
// Initialize the Accel.
accel_init(&accDev);
// Prepare memory for initialization.
memset(&driverInfo, 0, sizeof(driverInfo));
// Init TPM.
TPM_DRV_Init(BOARD_BUBBLE_TPM_INSTANCE, &driverInfo);
// Set clock for TPM.
TPM_DRV_SetClock(BOARD_BUBBLE_TPM_INSTANCE, kTpmClockSourceModuleClk, kTpmDividedBy2);
// Main loop. Get sensor data and update duty cycle for the TPM timer.
while(1)
{
// Wait 5 ms in between samples (accelerometer updates at 200Hz).
OSA_TimeDelay(5);
// Get new accelerometer data.
accDev.accel->accel_read_sensor_data(&accDev,&accelData);
// Init PWM module with updated configuration.
TPM_DRV_PwmStart(BOARD_BUBBLE_TPM_INSTANCE, &xAxisParams, BOARD_TPM_X_CHANNEL);
TPM_DRV_PwmStart(BOARD_BUBBLE_TPM_INSTANCE, &yAxisParams, BOARD_TPM_Y_CHANNEL);
// Get the X and Y data from the sensor data structure.fxos_data
xData = (int16_t)((accelData.data.accelXMSB << 8) | accelData.data.accelXLSB);
yData = (int16_t)((accelData.data.accelYMSB << 8) | accelData.data.accelYLSB);
// Convert raw data to angle (normalize to 0-90 degrees). No negative angles.
xAngle = abs((int16_t)(xData * 0.011));
yAngle = abs((int16_t)(yData * 0.011));
// Update angles to turn on LEDs when angles ~ 90
if(xAngle > 85) xAngle = 100;
if(yAngle > 85) yAngle = 100;
// Update angles to turn off LEDs when angles ~ 0
if(xAngle < 5) xAngle = 0;
if(yAngle < 5) yAngle = 0;
// Update pwm duty cycle
xAxisParams.uDutyCyclePercent = 100 - xAngle ;
yAxisParams.uDutyCyclePercent = 100 - yAngle ;
// Print out the raw accelerometer data.
PRINTF("x= %d y = %d\r\n", xData, yData);
}
}
