/**
* @brief Low level serial driver stop.
* @details De-initializes the UART, stops the associated clock, resets the
* interrupt vector.
*
* @param[in] sdp pointer to a @p SerialDriver object
*
* @notapi
*/
void sd_lld_stop(SerialDriver *sdp) {
if (sdp->state == SD_READY) {
uart_deinit(sdp->uart);
#if USE_LPC214x_UART0
if (&SD1 == sdp) {
PCONP = (PCONP & PCALL) & ~PCUART0;
VICIntEnClear = INTMASK(SOURCE_UART0);
return;
}
#endif
#if USE_LPC214x_UART1
if (&SD2 == sdp) {
PCONP = (PCONP & PCALL) & ~PCUART1;
VICIntEnClear = INTMASK(SOURCE_UART1);
return;
}
#endif
}
}
/**
* @brief Low level serial driver configuration and (re)start.
*
* @param[in] sdp pointer to a @p SerialDriver object
* @param[in] config the architecture-dependent serial driver configuration.
* If this parameter is set to @p NULL then a default
* configuration is used.
*
* @notapi
*/
void sd_lld_start(SerialDriver *sdp, const SerialConfig *config) {
if (config == NULL)
config = &default_config;
if (sdp->state == SD_STOP) {
#if USE_LPC214x_UART0
if (&SD1 == sdp) {
PCONP = (PCONP & PCALL) | PCUART0;
VICIntEnable = INTMASK(SOURCE_UART0);
}
#endif
#if USE_LPC214x_UART1
if (&SD2 == sdp) {
PCONP = (PCONP & PCALL) | PCUART1;
VICIntEnable = INTMASK(SOURCE_UART1);
}
#endif
}
uart_init(sdp, config);
}
/**
* @brief Deactivates the SPI peripheral.
*
* @param[in] spip pointer to the @p SPIDriver object
*
* @notapi
*/
void spi_lld_stop(SPIDriver *spip) {
if (spip->spd_state != SPI_STOP) {
spip->spd_ssp->SSP_CR1 = 0;
spip->spd_ssp->SSP_CR0 = 0;
spip->spd_ssp->SSP_CPSR = 0;
#if LPC214x_SPI_USE_SSP
if (&SPID1 == spip) {
PCONP = (PCONP & PCALL) & ~PCSPI1;
VICIntEnClear = INTMASK(SOURCE_SPI1);
}
#endif
}
}
/*
* Board-specific initialization code.
*/
void boardInit(void) {
/*
* System Timer initialization, 1ms intervals.
*/
SetVICVector(T0IrqHandler, 0, SOURCE_Timer0);
VICIntEnable = INTMASK(SOURCE_Timer0);
TC *timer = T0Base;
timer->TC_PR = VAL_TC0_PRESCALER;
timer->TC_MR0 = (PCLK / CH_FREQUENCY) / (VAL_TC0_PRESCALER + 1);
timer->TC_MCR = 3; /* Interrupt and clear TC on match MR0. */
timer->TC_TCR = 2; /* Reset counter and prescaler. */
timer->TC_TCR = 1; /* Timer enabled. */
}
/**
* @brief Configures and activates the SPI peripheral.
*
* @param[in] spip pointer to the @p SPIDriver object
*
* @notapi
*/
void spi_lld_start(SPIDriver *spip) {
if (spip->spd_state == SPI_STOP) {
/* Clock activation.*/
#if LPC214x_SPI_USE_SSP
if (&SPID1 == spip) {
PCONP = (PCONP & PCALL) | PCSPI1;
VICIntEnable = INTMASK(SOURCE_SPI1);
}
#endif
}
/* Configuration.*/
spip->spd_ssp->SSP_CR1 = 0;
/* Emptying the receive FIFO, it happens to not be empty while debugging.*/
while (spip->spd_ssp->SSP_SR & SR_RNE)
(void) spip->spd_ssp->SSP_DR;
spip->spd_ssp->SSP_ICR = ICR_RT | ICR_ROR;
spip->spd_ssp->SSP_CR0 = spip->spd_config->spc_cr0;
spip->spd_ssp->SSP_CPSR = spip->spd_config->spc_cpsr;
spip->spd_ssp->SSP_CR1 = CR1_SSE;
}