/* 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);
}
}
/*********************************************************************//**
* @brief Configures match for PWM peripheral
* @param[in] PWMx PWM peripheral selected, should be LPC_PWM1
* @param[in] PWM_MatchConfigStruct Pointer to a PWM_MATCHCFG_Type structure
* that contains the configuration information for the
* specified PWM match function.
* @return None
**********************************************************************/
void PWM_ConfigMatch(LPC_PWM_TypeDef *PWMx, PWM_MATCHCFG_Type *PWM_MatchConfigStruct)
{
CHECK_PARAM(PARAM_PWMx(PWMx));
CHECK_PARAM(PARAM_PWM1_MATCH_CHANNEL(PWM_MatchConfigStruct->MatchChannel));
CHECK_PARAM(PARAM_FUNCTIONALSTATE(PWM_MatchConfigStruct->IntOnMatch));
CHECK_PARAM(PARAM_FUNCTIONALSTATE(PWM_MatchConfigStruct->ResetOnMatch));
CHECK_PARAM(PARAM_FUNCTIONALSTATE(PWM_MatchConfigStruct->StopOnMatch));
//interrupt on MRn
if (PWM_MatchConfigStruct->IntOnMatch == ENABLE)
{
PWMx->MCR |= PWM_MCR_INT_ON_MATCH(PWM_MatchConfigStruct->MatchChannel);
}
else
{
PWMx->MCR &= (~PWM_MCR_INT_ON_MATCH(PWM_MatchConfigStruct->MatchChannel)) \
& PWM_MCR_BITMASK;
}
//reset on MRn
if (PWM_MatchConfigStruct->ResetOnMatch == ENABLE)
{
PWMx->MCR |= PWM_MCR_RESET_ON_MATCH(PWM_MatchConfigStruct->MatchChannel);
}
else
{
PWMx->MCR &= (~PWM_MCR_RESET_ON_MATCH(PWM_MatchConfigStruct->MatchChannel)) \
& PWM_MCR_BITMASK;
}
//stop on MRn
if (PWM_MatchConfigStruct->StopOnMatch == ENABLE)
{
PWMx->MCR |= PWM_MCR_STOP_ON_MATCH(PWM_MatchConfigStruct->MatchChannel);
}
else
{
PWMx->MCR &= (~PWM_MCR_STOP_ON_MATCH(PWM_MatchConfigStruct->MatchChannel)) \
& PWM_MCR_BITMASK;
}
}
/*********************************************************************//**
* @brief Configures match for PWM peripheral
* @param[in] pwmId The Id of the expected PWM component
*
* @param[in] PWM_MatchConfigStruct Pointer to a PWM_MATCHCFG_Type structure
* that contains the configuration information for the
* specified PWM match function.
* @return None
**********************************************************************/
void PWM_ConfigMatch(uint8_t pwmId, PWM_MATCHCFG_Type *PWM_MatchConfigStruct)
{
LPC_PWM_TypeDef* pPwm = PWM_GetPointer(pwmId);
//interrupt on MRn
if (PWM_MatchConfigStruct->IntOnMatch == ENABLE)
{
pPwm->MCR |= PWM_MCR_INT_ON_MATCH(PWM_MatchConfigStruct->MatchChannel);
}
else
{
pPwm->MCR &= (~ PWM_MCR_INT_ON_MATCH(PWM_MatchConfigStruct->MatchChannel)) \
& PWM_MCR_BITMASK;
}
//reset on MRn
if (PWM_MatchConfigStruct->ResetOnMatch == ENABLE)
{
pPwm->MCR |= PWM_MCR_RESET_ON_MATCH(PWM_MatchConfigStruct->MatchChannel);
}
else
{
pPwm->MCR &= (~ PWM_MCR_RESET_ON_MATCH(PWM_MatchConfigStruct->MatchChannel)) \
& PWM_MCR_BITMASK;
}
//stop on MRn
if (PWM_MatchConfigStruct->StopOnMatch == ENABLE)
{
pPwm->MCR |= PWM_MCR_STOP_ON_MATCH(PWM_MatchConfigStruct->MatchChannel);
}
else
{
pPwm->MCR &= (~ PWM_MCR_STOP_ON_MATCH(PWM_MatchConfigStruct->MatchChannel)) \
& PWM_MCR_BITMASK;
}
}