/**
* @brief ¿ªÆôLCD±³¹â
* @return none
* @date 2013/8/8
* @note
* @code
* @endcode
* @pre
* @see
*/
void LCDBackLightON(void) {
unsigned int addr = modulelist[GPIO_LCDBACKLIGHT_MODULE].baseAddr;
if (GPIO_DIR_INPUT == GPIODirModeGet(addr,GPIO_LCDBACKLIGHT_PIN)){
GPIODirModeSet(addr, GPIO_LCDBACKLIGHT_PIN, GPIO_DIR_OUTPUT);
}
GPIOPinWrite(addr, GPIO_LCDBACKLIGHT_PIN, 0);
}
/**
* @brief ¹Ø±ÕLCD±³¹â
* @return none
* @date 2013/8/8
* @note
* @code
* @endcode
* @pre
* @see
*/
void LCDBackLightOFF(void)
{
if (GPIO_DIR_INPUT == GPIODirModeGet(modulelist[GPIO_LCDBACKLIGHT_MODULE].baseAddr,
GPIO_LCDBACKLIGHT_PIN)){
GPIODirModeSet(modulelist[GPIO_LCDBACKLIGHT_MODULE].baseAddr,GPIO_LCDBACKLIGHT_PIN,GPIO_DIR_OUTPUT);
}
GPIOPinWrite(modulelist[GPIO_LCDBACKLIGHT_MODULE].baseAddr, GPIO_LCDBACKLIGHT_PIN,1);
}
/**************************************************************************************************
* @fn HalAdcRead
*
* @brief Read the ADC based on given channel and resolution
*
* @param channel - channel where ADC will be read
* @param resolution - the resolution of the value
*
* @return 16 bit value of the ADC in offset binary format.
*
* Note that the ADC is "bipolar", which means the GND (0V) level is mid-scale.
* Note2: This function assumes that ADCCON3 contains the voltage reference.
**************************************************************************************************/
uint16 HalAdcRead (uint8 channel, uint8 resolution)
{
int16 reading = 0;
#if (HAL_ADC == TRUE)
uint8 i, resbits;
uint8 adcChannel = 1;
uint32 padConfig, dirConfig;
halIntState_t s;
/*
* If Analog input channel is AIN0..AIN7, make sure corresponing PA pin is
* setup. Only port A can be used as input to the ADC. If any pin on port A
* is to be used as an ADC input, the appropriate register, IOC_PAx_OVER,
* must be set to analog (that is, bit 0 must be set to 1).
*/
/* Hold off interrupts */
HAL_ENTER_CRITICAL_SECTION(s);
switch (channel)
{
case HAL_ADC_CHN_AIN0:
case HAL_ADC_CHN_AIN1:
case HAL_ADC_CHN_AIN2:
case HAL_ADC_CHN_AIN3:
case HAL_ADC_CHN_AIN4:
case HAL_ADC_CHN_AIN5:
case HAL_ADC_CHN_AIN6:
case HAL_ADC_CHN_AIN7:
adcChannel <<= channel;
break;
case HAL_ADC_CHN_A0A1:
adcChannel = HAL_BITS_CHN_A0A1;
break;
case HAL_ADC_CHN_A2A3:
adcChannel = HAL_BITS_CHN_A2A3;
break;
case HAL_ADC_CHN_A4A5:
adcChannel = HAL_BITS_CHN_A4A5;
break;
case HAL_ADC_CHN_A6A7:
adcChannel = HAL_BITS_CHN_A6A7;
break;
default:
adcChannel = 0;
break;
}
/* save the current pad setting of the PortA pin */
padConfig = IOCPadConfigGet(GPIO_A_BASE, adcChannel);
/* save the current gpio setting of the PortA pin */
dirConfig = GPIODirModeGet(GPIO_A_BASE, adcChannel);
/* set the PortA pin to Analog */
IOCPadConfigSet(GPIO_A_BASE, adcChannel, IOC_OVERRIDE_ANA);
/* set the PortA pin direction to input */
GPIODirModeSet(GPIO_A_BASE, adcChannel, GPIO_DIR_MODE_IN);
/* Convert resolution to decimation rate */
switch (resolution)
{
case HAL_ADC_RESOLUTION_8:
resbits = HAL_ADC_DEC_064;
break;
case HAL_ADC_RESOLUTION_10:
resbits = HAL_ADC_DEC_128;
break;
case HAL_ADC_RESOLUTION_12:
resbits = HAL_ADC_DEC_256;
break;
case HAL_ADC_RESOLUTION_14:
default:
resbits = HAL_ADC_DEC_512;
break;
}
/* writing to this register starts the extra conversion */
ADCCON3 = channel | resbits | adcRef;
/* Wait for the conversion to be done */
while (!(ADCCON1 & HAL_ADC_EOC));
/* Set the pad configuration to previous value*/
IOCPadConfigSet(GPIO_A_BASE, adcChannel, padConfig);
/* Set the GPIO direction to previous value*/
GPIODirModeSet(GPIO_A_BASE, adcChannel, dirConfig);
/* Read the result */
reading = (int16) (ADCL);
reading |= (int16) (ADCH << 8);
/* Enable interrupts */
HAL_EXIT_CRITICAL_SECTION(s);
/* Treat small negative as 0 */
if (reading < 0)
reading = 0;
switch (resolution)
{
case HAL_ADC_RESOLUTION_8:
reading >>= 8;
break;
case HAL_ADC_RESOLUTION_10:
reading >>= 6;
break;
case HAL_ADC_RESOLUTION_12:
reading >>= 4;
break;
case HAL_ADC_RESOLUTION_14:
default:
reading >>= 2;
break;
}
#else
/* unused arguments */
(void) channel;
(void) resolution;
#endif
return ((uint16)reading);
}
