本帖最后由 尹子予刘学 于 2017-3-6 15:20 编辑
这个是官方的pingpong模式 可是一直没有调通 如果有会的 可以帮忙弄一下吗 谢谢
问题就是 每次在在我停止运行程序之后，再次运行程序两个数组的数据就不再改变
我想知道 我究竟应该怎么做这件事情 谢谢 才能用MSP432pingpong模式实现pingpong缓存
#include "driverlib.h"
/* Standard Includes */ #include <stdint.h> #include <stdbool.h>
#define TEST_LENGTH_SAMPLES 512 #define SAMPLE_LENGTH 512
/* ------------------------------------------------------------------ * Global variables for FFT Bin Example * ------------------------------------------------------------------- */ uint32_t fftSize = SAMPLE_LENGTH; uint32_t ifftFlag = 0; uint32_t doBitReverse = 1;
#define SMCLK_FREQUENCY 48000000 #define SAMPLE_FREQUENCY 8000
/* DMA Control Table */ #ifdef ewarm #pragma data_alignment=256 #else #pragma DATA_ALIGN(controlTable, 256) #endif uint8_t controlTable[256];
/* FFT data/processing buffers*/ float hann[SAMPLE_LENGTH]; int16_t data_array1[SAMPLE_LENGTH]; int16_t data_array2[SAMPLE_LENGTH]; int16_t data_array3[SAMPLE_LENGTH]; int16_t data_array4[SAMPLE_LENGTH];
volatile int switch_data = 0;
uint32_t color = 0;
/* Timer_A PWM Configuration Parameter */ Timer_A_PWMConfig pwmConfig = { TIMER_A_CLOCKSOURCE_SMCLK, TIMER_A_CLOCKSOURCE_DIVIDER_1, (SMCLK_FREQUENCY/SAMPLE_FREQUENCY), TIMER_A_CAPTURECOMPARE_REGISTER_1, TIMER_A_OUTPUTMODE_SET_RESET, (SMCLK_FREQUENCY/SAMPLE_FREQUENCY)/2 };
void main(void) { /* Halting WDT and disabling master interrupts */ MAP_WDT_A_holdTimer(); MAP_Interrupt_disableMaster(); switch_data = 0; /* Set the core voltage level to VCORE1 */ MAP_PCM_setCoreVoltageLevel(PCM_VCORE1);
/* Set 2 flash wait states for Flash bank 0 and 1*/ MAP_FlashCtl_setWaitState(FLASH_BANK0, 2); MAP_FlashCtl_setWaitState(FLASH_BANK1, 2);
/* Initializes Clock System */ MAP_CS_setDCOCenteredFrequency(CS_DCO_FREQUENCY_48); MAP_CS_initClockSignal(CS_MCLK, CS_DCOCLK_SELECT, CS_CLOCK_DIVIDER_1 ); MAP_CS_initClockSignal(CS_HSMCLK, CS_DCOCLK_SELECT, CS_CLOCK_DIVIDER_1 ); MAP_CS_initClockSignal(CS_SMCLK, CS_DCOCLK_SELECT, CS_CLOCK_DIVIDER_1 ); MAP_CS_initClockSignal(CS_ACLK, CS_REFOCLK_SELECT, CS_CLOCK_DIVIDER_1);
/* Configuring Timer_A to have a period of approximately 500ms and * an initial duty cycle of 10% of that (3200 ticks) */ Timer_A_generatePWM(TIMER_A0_BASE, &pwmConfig);
/* Initializing ADC (MCLK/1/1) */ ADC14_enableModule(); ADC14_initModule(ADC_CLOCKSOURCE_MCLK, ADC_PREDIVIDER_1, ADC_DIVIDER_1, 0);
ADC14_setSampleHoldTrigger(ADC_TRIGGER_SOURCE1, false);
/* Configuring GPIOs (4.3 A10) */ GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P4, GPIO_PIN3, GPIO_TERTIARY_MODULE_FUNCTION);
/* Configuring ADC Memory */ ADC14_configureSingleSampleMode(ADC_MEM0, true); ADC14_configureConversionMemory(ADC_MEM0, ADC_VREFPOS_AVCC_VREFNEG_VSS, ADC_INPUT_A10, false);
/* Set ADC result format to signed binary */ ADC14_setResultFormat(ADC_UNSIGNED_BINARY);
/* Configuring DMA module */ DMA_enableModule(); DMA_setControlBase(controlTable);
DMA_disableChannelAttribute(DMA_CH7_ADC14, UDMA_ATTR_ALTSELECT | UDMA_ATTR_USEBURST | UDMA_ATTR_HIGH_PRIORITY | UDMA_ATTR_REQMASK);
/* Setting Control Indexes. In this case we will set the source of the * DMA transfer to ADC14 Memory 0 * and the destination to the * destination data array. */ MAP_DMA_setChannelControl(UDMA_PRI_SELECT | DMA_CH7_ADC14, UDMA_SIZE_16 | UDMA_SRC_INC_NONE | UDMA_DST_INC_16 | UDMA_ARB_1); MAP_DMA_setChannelTransfer(UDMA_PRI_SELECT | DMA_CH7_ADC14, UDMA_MODE_PINGPONG, (void*) &ADC14->MEM[0], data_array1, SAMPLE_LENGTH);
MAP_DMA_setChannelControl(UDMA_ALT_SELECT | DMA_CH7_ADC14, UDMA_SIZE_16 | UDMA_SRC_INC_NONE | UDMA_DST_INC_16 | UDMA_ARB_1); MAP_DMA_setChannelTransfer(UDMA_ALT_SELECT | DMA_CH7_ADC14, UDMA_MODE_PINGPONG, (void*) &ADC14->MEM[0], data_array2, SAMPLE_LENGTH);
/* Assigning/Enabling Interrupts */ MAP_DMA_assignInterrupt(DMA_INT1, 7); MAP_Interrupt_enableInterrupt(INT_DMA_INT1); MAP_DMA_assignChannel(DMA_CH7_ADC14); MAP_DMA_clearInterruptFlag(7); MAP_Interrupt_enableMaster();
/* Now that the DMA is primed and setup, enabling the channels. The ADC14 * hardware should take over and transfer/receive all bytes */ MAP_DMA_enableChannel(7); MAP_ADC14_enableConversion();
while(1) { MAP_PCM_gotoLPM0(); __delay_cycles(200000); } }
/* Completion interrupt for ADC14 MEM0 */ void DMA_INT1_IRQHandler(void) { /* Switch between primary and alternate bufferes with DMA's PingPong mode */ if (DMA_getChannelAttribute(7) & UDMA_ATTR_ALTSELECT) { DMA_setChannelControl(UDMA_PRI_SELECT | DMA_CH7_ADC14, UDMA_SIZE_16 | UDMA_SRC_INC_NONE | UDMA_DST_INC_16 | UDMA_ARB_1); DMA_setChannelTransfer(UDMA_PRI_SELECT | DMA_CH7_ADC14, UDMA_MODE_PINGPONG, (void*) &ADC14->MEM[0], data_array1, SAMPLE_LENGTH); switch_data = 1; } else { DMA_setChannelControl(UDMA_ALT_SELECT | DMA_CH7_ADC14, UDMA_SIZE_16 | UDMA_SRC_INC_NONE | UDMA_DST_INC_16 | UDMA_ARB_1); DMA_setChannelTransfer(UDMA_ALT_SELECT | DMA_CH7_ADC14, UDMA_MODE_PINGPONG, (void*) &ADC14->MEM[0], data_array2, SAMPLE_LENGTH); switch_data = 0; } }
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