/*********************************************************************//**
* @brief c_entry: Main ADC program body
* @param[in] None
* @return None
**********************************************************************/
void c_entry(void)
{
volatile uint32_t adc_value, tmp;
uint8_t quit;
/* Initialize debug via UART0
* – 115200bps
* – 8 data bit
* – No parity
* – 1 stop bit
* – No flow control
*/
debug_frmwrk_init();
// print welcome screen
print_menu();
/* Initialize ADC ----------------------------------------------------*/
/*
* Init ADC pin that currently is being used on the board
*/
PINSEL_ConfigPin (BRD_ADC_PREPARED_CH_PORT, BRD_ADC_PREPARED_CH_PIN, BRD_ADC_PREPARED_CH_FUNC_NO);
PINSEL_SetAnalogPinMode(BRD_ADC_PREPARED_CH_PORT,BRD_ADC_PREPARED_CH_PIN,ENABLE);
/* Configuration for ADC :
* ADC conversion rate = 400Khz
*/
ADC_Init(LPC_ADC, 400000);
ADC_IntConfig(LPC_ADC, BRD_ADC_PREPARED_INTR, DISABLE);
ADC_ChannelCmd(LPC_ADC, BRD_ADC_PREPARED_CHANNEL, ENABLE);
while(1)
{
// Start conversion
ADC_StartCmd(LPC_ADC, ADC_START_NOW);
//Wait conversion complete
while (!(ADC_ChannelGetStatus(LPC_ADC, BRD_ADC_PREPARED_CHANNEL, ADC_DATA_DONE)));
adc_value = ADC_ChannelGetData(LPC_ADC, BRD_ADC_PREPARED_CHANNEL);
//Display the result of conversion on the UART
_DBG("ADC value on channel "); _DBD(BRD_ADC_PREPARED_CHANNEL);
_DBG(" is: "); _DBD32(adc_value); _DBG_("");
//delay
for(tmp = 0; tmp < 1000000; tmp++);
if(_DG_NONBLOCK(&quit) &&
(quit == 'Q' || quit == 'q'))
break;
}
_DBG_("Demo termination!!!");
ADC_DeInit(LPC_ADC);
}
/******************************************************************************
*
* Description:
* Initialize the trim potentiometer, i.e. ADC connected to TrimPot on
* Base Board.
*
*****************************************************************************/
void trimpot_init(void)
{
// pinsel for AD0.2 on p0.25
PINSEL_ConfigPin (0, 25, 1);
PINSEL_SetAnalogPinMode (0, 25, 1);
ADC_Init(LPC_ADC, 400000);
ADC_IntConfig(LPC_ADC, ADC_ADINTEN2, DISABLE);
ADC_ChannelCmd(LPC_ADC, ADC_CH_TRIMPOT, ENABLE);
}
/*********************************************************************//**
* @brief Initial ADC configuration
* - Maximum current is 700 uA
* - Value to AOUT is 0
* @param[in] DAC_Id the ID of the DAC component that is using, should be: zero (0)
* @return None
***********************************************************************/
void DAC_Init(uint8_t DAC_Id)
{
/*
* Init DAC pin connect
* AOUT on P0.26
*/
PINSEL_ConfigPin(0, 26, 2);
PINSEL_SetAnalogPinMode(0,26,ENABLE);
//Enable DAC for the pin
PINSEL_DacEnable(0, 26, ENABLE);
//Set maximum current output as default
DAC_SetBias(DAC_Id, DAC_MAX_CURRENT_700uA);
}
/*********************************************************************//**
* @brief c_entry: Main ADC program body
* @param[in] None
* @return None
**********************************************************************/
void c_entry(void)
{
volatile uint32_t tmp;
#if !__DMA_USED__
uint32_t adc_value;
#endif
uint8_t quit;
EXTI_InitTypeDef EXTICfg;
#if __DMA_USED__
GPDMA_Channel_CFG_Type GPDMACfg;
#endif
GPIO_Init();
/* Initialize debug via UART0
* – 115200bps
* – 8 data bit
* – No parity
* – 1 stop bit
* – No flow control
*/
debug_frmwrk_init();
// print welcome screen
print_menu();
/*
* Init ADC pin connect
* AD0.2 on P0.25
*/
PINSEL_ConfigPin(BRD_ADC_PREPARED_CH_PORT, BRD_ADC_PREPARED_CH_PIN, BRD_ADC_PREPARED_CH_FUNC_NO);
PINSEL_SetAnalogPinMode(BRD_ADC_PREPARED_CH_PORT,BRD_ADC_PREPARED_CH_PIN,ENABLE);
#ifdef LPC177x_8x_ADC_BURST_MULTI
/*
* Init ADC pin connect
* AD0.3 on P0.26
*/
PINSEL_ConfigPin(0, 26, 1);
PINSEL_SetAnalogPinMode(0,26,ENABLE);
#endif
/* Configuration for ADC:
* select: ADC channel 2
* ADC channel 3
* ADC conversion rate = 400KHz
*/
ADC_Init(LPC_ADC, 400000);
ADC_ChannelCmd(LPC_ADC,BRD_ADC_PREPARED_CHANNEL,ENABLE);
#ifdef LPC177x_8x_ADC_BURST_MULTI
ADC_ChannelCmd(LPC_ADC,_ADC_CHANNEL_n,ENABLE);
#endif
#ifdef LPC177x_8x_ADC_INJECT_TEST
//Config P2.10 as EINT0
PINSEL_ConfigPin(2,10,1);
EXTI_Init();
EXTICfg.EXTI_Line = EXTI_EINT0;
/* edge sensitive */
EXTICfg.EXTI_Mode = EXTI_MODE_EDGE_SENSITIVE;
EXTICfg.EXTI_polarity = EXTI_POLARITY_LOW_ACTIVE_OR_FALLING_EDGE;
EXTI_Config(&EXTICfg);
GPIO_SetDir(LED_PORT,LED_PIN,1);
GPIO_SetValue(LED_PORT,LED_PIN);
NVIC_EnableIRQ(EINT0_IRQn);
#endif
#if __DMA_USED__
/* Initialize GPDMA controller */
GPDMA_Init();
// Setup GPDMA channel --------------------------------
// channel 0
GPDMACfg.ChannelNum = 0;
// Source memory - unused
GPDMACfg.SrcMemAddr = 0;
// Destination memory
GPDMACfg.DstMemAddr = (uint32_t)s_buf;
// Transfer size
GPDMACfg.TransferSize = DMA_SIZE;
// Transfer width - unused
GPDMACfg.TransferWidth = 0;
// Transfer type
GPDMACfg.TransferType = GPDMA_TRANSFERTYPE_P2M;
// Source connection
GPDMACfg.SrcConn = GPDMA_CONN_ADC;
// Destination connection - unused
GPDMACfg.DstConn = 0;
// Linker List Item - unused
GPDMACfg.DMALLI = 0;
/* Enable GPDMA interrupt */
NVIC_EnableIRQ(DMA_IRQn);
while(1)
{
for(tmp = 0; tmp < 0x1000; tmp++);
/* Reset terminal counter */
Channel0_TC = 0;
/* Reset Error counter */
Channel0_Err = 0;
for(tmp = 0; tmp < DMA_SIZE; tmp++)
{
s_buf[tmp] = 0;
}
//Start burst conversion
ADC_BurstCmd(LPC_ADC,ENABLE);
GPDMA_Setup(&GPDMACfg);
// Enable GPDMA channel 1
GPDMA_ChannelCmd(0, ENABLE);
/* Wait for GPDMA processing complete */
while ((Channel0_TC == 0));
GPDMA_ChannelCmd(0, DISABLE);
for(tmp = 0; tmp < DMA_SIZE; tmp++)
{
if(s_buf[tmp] & ADC_GDR_DONE_FLAG)
{
_DBG("ADC value on channel "); _DBD(ADC_GDR_CH(s_buf[tmp])); _DBG(": ");
_DBD32(ADC_GDR_RESULT(s_buf[tmp]));_DBG_("");
}
}
if(_DG_NONBLOCK(&quit) &&
(quit == 'Q' || quit == 'q'))
break;
}
#else
//Start burst conversion
ADC_BurstCmd(LPC_ADC,ENABLE);
while(1)
{
adc_value = ADC_ChannelGetData(LPC_ADC,BRD_ADC_PREPARED_CHANNEL);
_DBG("ADC value on channel "); _DBD(BRD_ADC_PREPARED_CHANNEL); _DBG(": ");
_DBD32(adc_value);
_DBG_("");
#ifdef LPC177x_8x_ADC_BURST_MULTI
adc_value = ADC_ChannelGetData(LPC_ADC,_ADC_CHANNEL_n);
_DBG("ADC value on channel 3: ");
_DBD32(adc_value);
_DBG_("");
#endif
// Wait for a while
for(tmp = 0; tmp < 1500000; tmp++);
if(_DG_NONBLOCK(&quit) &&
(quit == 'Q' || quit == 'q'))
break;
}
#endif /*__DMA_USED__*/
_DBG_("Demo termination!!!");
ADC_DeInit(LPC_ADC);
GPIO_Deinit();
}
/*********************************************************************//**
* @brief c_entry: Main ADC program body
* @param[in] None
* @return None
**********************************************************************/
void c_entry(void)
{
GPDMA_Channel_CFG_Type GPDMACfg;
volatile uint32_t adc_value, tmp;
uint8_t quit;
/* Initialize debug via UART0
* ?115200bps
* ?8 data bit
* ?No parity
* ?1 stop bit
* ?No flow control
*/
debug_frmwrk_init();
// print welcome screen
print_menu();
/* Initialize ADC ----------------------------------------------------*/
/* Settings for AD input pin
*/
PINSEL_ConfigPin (BRD_ADC_PREPARED_CH_PORT, BRD_ADC_PREPARED_CH_PIN, BRD_ADC_PREPARED_CH_FUNC_NO);
PINSEL_SetAnalogPinMode(BRD_ADC_PREPARED_CH_PORT,BRD_ADC_PREPARED_CH_PIN,ENABLE);
/* Configuration for ADC :
* ADC conversion rate = 400KHz
*/
ADC_Init(LPC_ADC, 400000);
ADC_IntConfig(LPC_ADC, BRD_ADC_PREPARED_INTR, ENABLE);
ADC_ChannelCmd(LPC_ADC, BRD_ADC_PREPARED_CHANNEL, ENABLE);
/* GPDMA block section -------------------------------------------- */
/* Disable GPDMA interrupt */
NVIC_DisableIRQ(DMA_IRQn);
/* preemption = 1, sub-priority = 1 */
NVIC_SetPriority(DMA_IRQn, ((0x01<<3)|0x01));
/* Initialize GPDMA controller */
GPDMA_Init();
// Setup GPDMA channel --------------------------------
// channel 0
GPDMACfg.ChannelNum = 0;
// Source memory - unused
GPDMACfg.SrcMemAddr = 0;
// Destination memory
GPDMACfg.DstMemAddr = (uint32_t) &adc_value;
// Transfer size
GPDMACfg.TransferSize = DMA_SIZE;
// Transfer width - unused
GPDMACfg.TransferWidth = 0;
// Transfer type
GPDMACfg.TransferType = GPDMA_TRANSFERTYPE_P2M;
// Source connection
GPDMACfg.SrcConn = GPDMA_CONN_ADC;
// Destination connection - unused
GPDMACfg.DstConn = 0;
// Linker List Item - unused
GPDMACfg.DMALLI = 0;
GPDMA_Setup(&GPDMACfg);
/* Reset terminal counter */
Channel0_TC = 0;
/* Reset Error counter */
Channel0_Err = 0;
/* Enable GPDMA interrupt */
NVIC_EnableIRQ(DMA_IRQn);
while (1)
{
// Enable GPDMA channel 0
GPDMA_ChannelCmd(0, ENABLE);
ADC_StartCmd(LPC_ADC, ADC_START_NOW);
/* Wait for GPDMA processing complete */
while ((Channel0_TC == 0));
// Disable GPDMA channel 0
GPDMA_ChannelCmd(0, DISABLE);
//Display the result of conversion on the UART
_DBG("ADC value on channel "); _DBD(BRD_ADC_PREPARED_CHANNEL);
_DBG(" is: "); _DBD32(ADC_DR_RESULT(adc_value)); _DBG_("");
// Wait for a while
for(tmp = 0; tmp < 1000000; tmp++);
/* GPDMA Re-setup */
GPDMA_Setup(&GPDMACfg);
/* Reset terminal counter */
Channel0_TC = 0;
/* Reset Error counter */
Channel0_Err = 0;
if(_DG_NONBLOCK(&quit) &&
(quit == 'Q' || quit == 'q'))
break;
}
_DBG_("Demo termination!!!");
ADC_DeInit(LPC_ADC);
}
