DCS_TEAM / Mbed 2 deprecated Chemical_Sensor_DMA

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependencies:   mbed

Dependents:   DCS_FINAL_CODE

Fork of Chemical_Sensor_DMA by Jared Baxter

main.cpp@5:1b2dc43e8947, 2015-11-06 (annotated)

Committer:
baxterja
Date:
Fri Nov 06 19:28:49 2015 +0000
Revision:
5:1b2dc43e8947
Parent:
4:9fd291254686 
Dewayne,  Use this one

Who changed what in which revision?

UserRevisionLine numberNew contents of line
baxterja 2:3771b3195c7b 1 #include "mbed.h"
baxterja 2:3771b3195c7b 2 #include "pause.cpp"
baxterja 2:3771b3195c7b 3 #include "Sample/adc.h"
baxterja 2:3771b3195c7b 4 #include "Sample/pdb.h"
baxterja 3:a85b742be262 5 #include "SignalProcessing.h"
baxterja 2:3771b3195c7b 6 // for debug purposes
baxterja 2:3771b3195c7b 7 Serial pc(USBTX, USBRX);
baxterja 2:3771b3195c7b 8 DigitalOut led_red(LED_RED);
baxterja 2:3771b3195c7b 9 DigitalOut led_green(LED_GREEN);
baxterja 2:3771b3195c7b 10 DigitalOut led_blue(LED_BLUE);
baxterja 2:3771b3195c7b 11
baxterja 2:3771b3195c7b 12 Timer t1;
baxterja 2:3771b3195c7b 13 using namespace std;
baxterja 2:3771b3195c7b 14
baxterja 4:9fd291254686 15
baxterja 4:9fd291254686 16
baxterja 4:9fd291254686 17
baxterja 4:9fd291254686 18 #define PDB_DACINTC0_TOE 0x01 // 0x01 -> PDB DAC interal trigger enabled
baxterja 4:9fd291254686 19
baxterja 4:9fd291254686 20 #define DAC0_DAT0 (uint16_t *)0x400CC000 // DAC word buffer base address
baxterja 4:9fd291254686 21
baxterja 4:9fd291254686 22 uint16_t *p1;
baxterja 4:9fd291254686 23 void setUpDac()
baxterja 4:9fd291254686 24 {
baxterja 4:9fd291254686 25 SIM_SCGC2 |= SIM_SCGC2_DAC0_MASK; // turn on clock to the DAC
baxterja 4:9fd291254686 26 SIM_SCGC6 |= SIM_SCGC6_DAC0_MASK; // turn on clock to the DAC
baxterja 4:9fd291254686 27 DAC0_C0 |= DAC_C0_DACEN_MASK ; // enable the DAC; must do before any of the following
baxterja 5:1b2dc43e8947 28 DAC0_C2 =9;//cycle through the first 10 values in the buffer
baxterja 5:1b2dc43e8947 29 DAC0_C1 = 1;//enable the dac buffer
baxterja 4:9fd291254686 30 p1 = DAC0_DAT0;
baxterja 5:1b2dc43e8947 31 for (int i = 0; i < 16; i++)//fill the buffer
baxterja 4:9fd291254686 32 {
baxterja 4:9fd291254686 33 *p1++ = (uint16_t) (cos(3.14159265359 * 2 * 10000 * .00001 * i) * 460.0 + 2870.0); // 3351.0
baxterja 4:9fd291254686 34 //printf("Pointer: %d\tValue: %d\n\r", (uint32_t)p1,(int) (cos(3.14159265359 * 2 * 10000 * .00001 * i) * 800.0 + 3103.0));
baxterja 4:9fd291254686 35 }
baxterja 5:1b2dc43e8947 36
baxterja 4:9fd291254686 37 }
baxterja 4:9fd291254686 38
baxterja 3:a85b742be262 39 int main()
baxterja 3:a85b742be262 40 {
baxterja 4:9fd291254686 41
baxterja 2:3771b3195c7b 42 led_blue = 1;
baxterja 2:3771b3195c7b 43 led_green = 1;
baxterja 2:3771b3195c7b 44 led_red = 1;
baxterja 3:a85b742be262 45 pre_compute_tables();
baxterja 3:a85b742be262 46
baxterja 2:3771b3195c7b 47
baxterja 4:9fd291254686 48 // t1.reset();
baxterja 4:9fd291254686 49 // for (int t = 0; t<500000; t++)
baxterja 4:9fd291254686 50 // {
baxterja 4:9fd291254686 51 // int input1 = 5000*cos(3.14159265359 * 2*10000*t*.00001)+2500;
baxterja 4:9fd291254686 52 // int input2 = 2500*sin(3.14159265359 * 2*10000*t*.00001)+2500;
baxterja 4:9fd291254686 53 // t1.start();
baxterja 4:9fd291254686 54 // filter100K(input1, input2);
baxterja 4:9fd291254686 55 // t1.stop();
baxterja 4:9fd291254686 56 // }
baxterja 4:9fd291254686 57 // printf("FINAL TIME: %f\n\r",t1.read());
baxterja 4:9fd291254686 58
baxterja 5:1b2dc43e8947 59 pc.printf("Starting...\r\n");
baxterja 2:3771b3195c7b 60 for(int i = 0; i < 86; i++)
baxterja 2:3771b3195c7b 61 {
baxterja 2:3771b3195c7b 62 if(NVIC_GetPriority((IRQn_Type) i) == 0) NVIC_SetPriority((IRQn_Type) i, 2);
baxterja 2:3771b3195c7b 63 }
baxterja 2:3771b3195c7b 64
baxterja 2:3771b3195c7b 65 // Give hardware associated with
baxterja 2:3771b3195c7b 66 // sampling the highest priority
baxterja 2:3771b3195c7b 67 NVIC_SetPriority(ADC1_IRQn,0);
baxterja 2:3771b3195c7b 68 NVIC_SetPriority(ADC0_IRQn,0);
baxterja 2:3771b3195c7b 69 NVIC_SetPriority(PDB0_IRQn,0);
baxterja 2:3771b3195c7b 70 NVIC_SetPriority(DMA0_IRQn,0);
baxterja 2:3771b3195c7b 71 NVIC_SetPriority(DMA1_IRQn,0);
baxterja 2:3771b3195c7b 72 NVIC_SetPriority(DMA2_IRQn,0);
baxterja 2:3771b3195c7b 73
baxterja 2:3771b3195c7b 74 NVIC_SetPriority(ENET_1588_Timer_IRQn,1);
baxterja 2:3771b3195c7b 75 NVIC_SetPriority(ENET_Transmit_IRQn,1);
baxterja 2:3771b3195c7b 76 NVIC_SetPriority(ENET_Receive_IRQn,1);
baxterja 2:3771b3195c7b 77 NVIC_SetPriority(ENET_Error_IRQn,1);
baxterja 2:3771b3195c7b 78
baxterja 2:3771b3195c7b 79 adc_init(); // initialize ADCs (always initialize adc before dma)
baxterja 4:9fd291254686 80 setUpDac();
baxterja 2:3771b3195c7b 81 dma_init(); // initializes DMAs
baxterja 2:3771b3195c7b 82 pdb_init(); // initialize PDB0 as the timer for ADCs and DMA2
baxterja 2:3771b3195c7b 83
baxterja 2:3771b3195c7b 84 // flash green led indicating startup complete
baxterja 2:3771b3195c7b 85 led_red = 1;
baxterja 2:3771b3195c7b 86 led_blue = 1;
baxterja 2:3771b3195c7b 87 led_green = 0;
baxterja 2:3771b3195c7b 88 pause_ms(500);
baxterja 2:3771b3195c7b 89 led_green = 1;
baxterja 2:3771b3195c7b 90 pause_ms(200);
baxterja 2:3771b3195c7b 91 led_green = 0;
baxterja 4:9fd291254686 92 pause_ms(500);
baxterja 2:3771b3195c7b 93 led_green = 1;
baxterja 2:3771b3195c7b 94 pdb_start();
baxterja 2:3771b3195c7b 95 int startAddress = (int)&sample_array0[0];
baxterja 4:9fd291254686 96 int destinationIndex = (DMA_TCD0_DADDR-startAddress)/2;
baxterja 4:9fd291254686 97 int currentIndex;
baxterja 2:3771b3195c7b 98 while (1)
baxterja 2:3771b3195c7b 99 {
baxterja 4:9fd291254686 100
baxterja 4:9fd291254686 101
baxterja 5:1b2dc43e8947 102 destinationIndex = (DMA_TCD0_DADDR-startAddress)/2;//-1;
baxterja 5:1b2dc43e8947 103 //if (destinationIndex<0)
baxterja 5:1b2dc43e8947 104 // destinationIndex = 1999;
baxterja 4:9fd291254686 105 while (currentIndex!=destinationIndex)
baxterja 2:3771b3195c7b 106 {
baxterja 4:9fd291254686 107 filter100K(sample_array0[currentIndex], sample_array1[currentIndex]);
baxterja 4:9fd291254686 108 currentIndex++;
baxterja 4:9fd291254686 109 if (currentIndex>=2000)
baxterja 4:9fd291254686 110 currentIndex = 0;
baxterja 4:9fd291254686 111
baxterja 2:3771b3195c7b 112 }
baxterja 2:3771b3195c7b 113
baxterja 2:3771b3195c7b 114 }
baxterja 4:9fd291254686 115
baxterja 4:9fd291254686 116
baxterja 4:9fd291254686 117 }