/********************************************************************//**
* @brief Enable/Disable PWM channel output
* @param[in] pwmId The Id of the expected PWM component
*
* @param[in] PWMChannel PWM channel, should be in range from 1 to 6
* @param[in] NewState New State of this function, should be:
* - ENABLE: Enable this PWM channel output
* - DISABLE: Disable this PWM channel output
* @return None
*********************************************************************/
void PWM_ChannelCmd(uint8_t pwmId, uint8_t PWMChannel, FunctionalState NewState)
{
LPC_PWM_TypeDef* pPwm = PWM_GetPointer(pwmId);
if (NewState == ENABLE)
{
pPwm->PCR |= PWM_PCR_PWMENAn(PWMChannel);
}
else
{
pPwm->PCR &= (~ PWM_PCR_PWMENAn(PWMChannel)) & PWM_PCR_BITMASK;
}
}
/********************************************************************//**
* @brief Enable/Disable PWM channel output
* @param[in] PWMx PWM peripheral selected, should be LPC_PWM1
* @param[in] PWMChannel PWM channel, should be in range from 1 to 6
* @param[in] NewState New State of this function, should be:
* - ENABLE: Enable this PWM channel output
* - DISABLE: Disable this PWM channel output
* @return None
*********************************************************************/
void PWM_ChannelCmd(LPC_PWM_TypeDef *PWMx, uint8_t PWMChannel, FunctionalState NewState)
{
CHECK_PARAM(PARAM_PWMx(PWMx));
CHECK_PARAM(PARAM_PWM1_CHANNEL(PWMChannel));
if (NewState == ENABLE)
{
PWMx->PCR |= PWM_PCR_PWMENAn(PWMChannel);
}
else
{
PWMx->PCR &= (~PWM_PCR_PWMENAn(PWMChannel)) & PWM_PCR_BITMASK;
}
}
/* dac_init
*
* Initialize the DAC. This must be called once after reset.
*/
void COLD dac_init() {
/* Turn on the PWM and timer peripherals. */
CLKPWR_ConfigPPWR(CLKPWR_PCONP_PCPWM1, ENABLE);
CLKPWR_SetPCLKDiv(CLKPWR_PCLKSEL_PWM1, CLKPWR_PCLKSEL_CCLK_DIV_4);
/* Set up the SSP to communicate with the DAC, and initialize to 0 */
hw_dac_init();
/* ... and LDAC on the PWM peripheral */
LPC_PINCON->PINSEL4 |= (1 << 8);
/* Get the pin set up to produce a low LDAC puslse */
LPC_GPIO2->FIODIR |= (1 << 4);
LPC_GPIO2->FIOCLR = (1 << 4);
/* The PWM peripheral is used to generate LDAC pulses. Set it up,
* but hold it in reset until go time. */
LPC_PWM1->TCR = PWM_TCR_COUNTER_RESET | PWM_TCR_COUNTER_ENABLE;
/* Reset on match channel 0 */
LPC_PWM1->MCR = PWM_MCR_RESET_ON_MATCH(0) | PWM_MCR_INT_ON_MATCH(0);
/* Enable single-edge PWM on channel 5 */
LPC_PWM1->PCR = PWM_PCR_PWMENAn(5);
/* The match registers themselves will be set by dac_start(). */
/* Enable the write-to-DAC interrupt with the highest priority. */
NVIC_SetPriority(PWM1_IRQn, 0);
NVIC_EnableIRQ(PWM1_IRQn);
dac_control.state = DAC_IDLE;
dac_control.irq_do = IRQ_DO_PANIC;
dac_control.count = 0;
dac_current_pps = 0;
dac_control.color_control.word = 0;
delay_line_reset();
dac_control.red_gain = COORD_MAX;
dac_control.green_gain = COORD_MAX;
dac_control.blue_gain = COORD_MAX;
if (hw_dac_16bit) {
memcpy(PWM1_IRQHandler, goto_dac16_handle_irq, goto_dac16_handle_irq_end - goto_dac16_handle_irq);
}
}
