TM4C1294使用ADC和DMA，怎样配置DMA传输结束中断

只看该作者 · 2020-12-4 16:07

定时器触发ADC采样，之后用DMA把数据传出去，问题出在中断函数是由ADC采样触发的，而不是由DMA传输完成触发，所以请帮忙看一下，怎样配置为DMA传输结束触发中断，代码如下

#include <stdint.h>
#include <stdbool.h>
#include "inc/hw_memmap.h"
#include "driverlib/rom.h"
#include "driverlib/gpio.h"
#include "driverlib/pin_map.h"
#include "driverlib/sysctl.h"
#include "driverlib/uart.h"
#include "utils/uartstdio.h"
#include "myfunctions/led.h"
#include "myfunctions/delay.h"
#include "driverlib/timer.h"
#include "driverlib/udma.h"
#include "driverlib/adc.h"
#include "driverlib/adc.c"
//****************************************************************************
// System clock rate in Hz.
//****************************************************************************
uint32_t g_ui32SysClock;
uint32_t ADCBufferA[1024];
uint32_t ADCBufferB[1024];
uint32_t ADCBufferACount=0;
uint32_t ADCBufferBCount=0;
uint32_t TimeCount;
//*****************************************************************************
//
// The control table used by the uDMA controller. This table must be aligned
// to a 1024 byte boundary.
//
//*****************************************************************************
#if defined(ewarm)
#pragma data_alignment=1024
uint8_t pui8ControlTable[1024];
#elif defined(ccs)
#pragma DATA_ALIGN(pui8ControlTable, 1024)
uint8_t pui8ControlTable[1024];
#else
uint8_t pui8ControlTable[1024] __attribute__ ((aligned(1024)));
#endif
//*****************************************************************************
// Configure the UART and its pins. This must be called before UARTprintf().
//*****************************************************************************
void
ConsoleInit(void)
{
// Enable the GPIO Peripheral used by the UART.
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
// Enable UART0.
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);
// Configure GPIO Pins for UART mode.
ROM_GPIOPinConfigure(GPIO_PA0_U0RX);
ROM_GPIOPinConfigure(GPIO_PA1_U0TX);
ROM_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
// Initialize the UART for console I/O.
UARTStdioConfig(0, 115200, g_ui32SysClock);
}
void
Timer0AIntHandler()
{
TimerIntClear(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
TimeCount++;
}
void
ADCIntHandler()
{
uint32_t ui32Mode;
LED_SET(4);
ADCIntClearEx(ADC0_BASE, ADC_INT_DMA_SS0);
ui32Mode = uDMAChannelModeGet(UDMA_CHANNEL_ADC0 | UDMA_PRI_SELECT);
if(ui32Mode == UDMA_MODE_STOP)
{
ADCBufferACount++;
ADCBufferACount &= 1024;
ROM_uDMAChannelTransferSet(UDMA_CHANNEL_ADC0 | UDMA_PRI_SELECT,
UDMA_MODE_PINGPONG,
(void *)(ADC0_BASE+ADC_O_SSFIFO0),
&ADCBufferA[ADCBufferACount*16], 8);
}
ui32Mode = uDMAChannelModeGet(UDMA_CHANNEL_ADC0 | UDMA_ALT_SELECT);
if(ui32Mode == UDMA_MODE_STOP)
{
ADCBufferBCount++;
ADCBufferBCount &= 1024;
ROM_uDMAChannelTransferSet(UDMA_CHANNEL_ADC0 | UDMA_ALT_SELECT,
UDMA_MODE_PINGPONG,
(void *)(ADC0_BASE+ADC_O_SSFIFO0),
&ADCBufferB[ADCBufferBCount*16], 8);
}
if(!ROM_uDMAChannelIsEnabled(UDMA_CHANNEL_ADC0))
{
LED_SET(4);
ROM_uDMAChannelEnable(UDMA_CHANNEL_ADC0);
}
// UARTprintf("\nBuffer A\n");
// UARTprintf("Value:%dmV\t",(ADCBufferA[Index] * 3300)/4096);
UARTprintf("\nBuffer A Value%d:%d\n",ADCBufferACount,ADCBufferA[ADCBufferACount]);
// UARTprintf("\nBuffer B\n");
// UARTprintf("Value:%dmV\t",(ADCBufferB[Index] * 3300)/4096);
UARTprintf("\nBuffer B Value%d:%d\n",ADCBufferBCount,ADCBufferB[ADCBufferBCount]);
if(TimeCount>5)
ADCIntDisableEx(ADC0_BASE, ADC_INT_DMA_SS0);
LED_CLR(4);
}
int
main(void)
{
//ÅäÖÃÊ±ÖÓ120MHz
g_ui32SysClock = SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
SYSCTL_OSC_MAIN | SYSCTL_USE_PLL |
SYSCTL_CFG_VCO_480), 120000000);
//ÅäÖÃUART0
ConsoleInit();
//ÅäÖÃLED
LED_Init();
//ÅäÖÃTIMER 0
SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER0);
TimerConfigure(TIMER0_BASE, TIMER_CFG_PERIODIC);
TimerLoadSet(TIMER0_BASE, TIMER_A, g_ui32SysClock);
TimerIntRegister(TIMER0_BASE, TIMER_A, Timer0AIntHandler);
IntEnable(INT_TIMER0A);
TimerIntEnable(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
TimerEnable(TIMER0_BASE, TIMER_A);
//Ê¹ÄÜDMAÄ£¿é
SysCtlPeripheralEnable(SYSCTL_PERIPH_UDMA);
uDMAEnable();
uDMAControlBaseSet(pui8ControlTable);
//Ê¹ÄÜADC0Ä£¿é
SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);
//ÅäÖÃ²ÉÑùÐòÁÐµÄ´¥·¢Ô´ºÍÓÅÏÈ¼¶
ADCSequenceConfigure(ADC0_BASE, 0, ADC_TRIGGER_TIMER, 0);
//ÅäÖÃADC´¥·¢
TimerControlTrigger(TIMER0_BASE, TIMER_A, true);
//ÅäÖÃADCÖÐ¶Ï
ADCIntEnable(ADC0_BASE, 0);
//ÖÐ¶ÏÑ¡Ôñ
ADCIntEnableEx(ADC0_BASE, ADC_INT_DMA_SS0);
//×¢²áÖÐ¶Ïº¯Êý
ADCIntRegister(ADC0_BASE, 0, ADCIntHandler);
//Ê¹ÄÜADCÖÐ¶Ï
IntEnable(INT_ADC0SS0);
//ÅäÖÃ²ÉÑùÐòÁÐµÄ½ÚÅÄ
ADCSequenceStepConfigure(ADC0_BASE, 0, 0, ADC_CTL_CH0);
ADCSequenceStepConfigure(ADC0_BASE, 0, 1, ADC_CTL_CH0);
ADCSequenceStepConfigure(ADC0_BASE, 0, 2, ADC_CTL_CH0);
ADCSequenceStepConfigure(ADC0_BASE, 0, 3, ADC_CTL_CH0);
ADCSequenceStepConfigure(ADC0_BASE, 0, 4, ADC_CTL_CH0);
ADCSequenceStepConfigure(ADC0_BASE, 0, 5, ADC_CTL_CH0);
ADCSequenceStepConfigure(ADC0_BASE, 0, 6, ADC_CTL_CH0);
ADCSequenceStepConfigure(ADC0_BASE, 0, 7, ADC_CTL_CH0 | ADC_CTL_END);
//Ê¹ÄÜ²ÉÑùÐòÁÐµÄDMA´«Êä
ADCSequenceDMAEnable(ADC0_BASE, 0);
//ÅäÖÃÍ¨µÀÊôÐÔ
ROM_uDMAChannelControlSet(UDMA_CHANNEL_ADC0 | UDMA_PRI_SELECT,
UDMA_SIZE_32 | UDMA_SRC_INC_NONE | UDMA_DST_INC_32 |
UDMA_ARB_4);
ROM_uDMAChannelControlSet(UDMA_CHANNEL_ADC0 | UDMA_ALT_SELECT,
UDMA_SIZE_32 | UDMA_SRC_INC_NONE | UDMA_DST_INC_32 |
UDMA_ARB_4);
//ÅäÖÃ´«Êä²ÎÊý
ROM_uDMAChannelTransferSet(UDMA_CHANNEL_ADC0 | UDMA_PRI_SELECT,
UDMA_MODE_PINGPONG,
(void *)(ADC0_BASE+ADC_O_SSFIFO0),
ADCBufferA, 8);
ROM_uDMAChannelTransferSet(UDMA_CHANNEL_ADC0 | UDMA_ALT_SELECT,
UDMA_MODE_PINGPONG,
(void *)(ADC0_BASE+ADC_O_SSFIFO0),
ADCBufferB, 8);
//Ê¹ÄÜÍ¨µÀ
ROM_uDMAChannelEnable(UDMA_CHANNEL_ADC0);
//Ê¹ÄÜ²ÉÑùÐòÁÐ
ADCSequenceEnable(ADC0_BASE, 0);
IntMasterEnable();
LED_SET(1);
while(1)
{
LED_SET(2);
Delay_ms(200);
LED_CLR(2);
Delay_ms(200);
if(TimeCount>6)
break;
}
uint32_t Index;
UARTprintf("\nBuffer A\n");
for(Index=0;Index<128;Index++)
// UARTprintf("Value:%dmV\t",(ADCBufferA[Index] * 3300)/4096);
UARTprintf("Value:%d\t",ADCBufferA[Index]);
UARTprintf("\nBuffer B\n");
for(Index=0;Index<128;Index++)
// UARTprintf("Value:%dmV\t",(ADCBufferB[Index] * 3300)/4096);
UARTprintf("Value:%d\t",ADCBufferB[Index]);
while(1)
{
LED_SET(3);
Delay_ms(500);
LED_CLR(3);
Delay_ms(500);
}
}

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TM4C1294使用ADC和DMA，怎样配置DMA传输结束中断

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