Revision 114:cb1ac5905df4, committed 2019-12-08

Comitter:

yutonggu

Date:

Sun Dec 08 05:27:35 2019 +0000

Parent:

113:233a2fac1911

Commit message:

Changed to use fastADC and sample at 20KHz

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/fastADC.lib	Sun Dec 08 05:27:35 2019 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/teams/SafeDetect/code/fastADC/#d415e0b7dc3e

--- a/main.cpp	Tue Dec 03 22:39:22 2019 +0000
+++ b/main.cpp	Sun Dec 08 05:27:35 2019 +0000
@@ -9,6 +9,7 @@
 #include <AnalogIn.h>
 #include <AnalogOut.h>
 #include "circ_buff.hpp"
+#include "fastADC.h"
 
 
 AnalogOut v_src(GPIO0);
@@ -28,35 +29,33 @@
 #define WINDOW_SIZE         DEF_WINLENGTH - DEF_FRAMESHIFT
 #define ARRAY_SIZE          800
  
-#define BUFFSIZE                    11100 // size of buffer = sampling_time * sampling_rate * size(float)
+#define BUFFSIZE                    1000 // size of buffer = sampling_time * sampling_rate * size(float)
 //DigitalOut led1(LED1);
 //DigitalOut led2(LED2);
 Thread thread_adc;
 Thread thread_mfcc;
+Ticker read_ADC_ticker;
 
 // PIN DEFINITIONS
 DigitalOut vcc(GPIO0);
 AnalogIn mic(PB_0);
 CircularBuff<uint16_t> buff(BUFFSIZE);
 
+Serial pc(USBTX, USBRX);
 
-int num_readings = 0;
+volatile int num_readings = 0;
 int z = 0;
-uint16_t raw_adc = 0; 
+volatile uint16_t raw_adc = 0; 
 uint16_t* pop_val;
 
 void adc_thread() {
-    while (true) {
-        for (;;) {                            /* Loop forever                       */
-            if (ADC1->SR & (1 << 1)) {          /* If conversion has finished         */
-              raw_adc = ADC1->DR & 0x0FFF;       /* Read AD converted value            */
-              ADC1->CR2 |= 1 << 22;             /* Start new conversion               */ 
-            }
-            buff.push(raw_adc);
-            num_readings++;
-        }
+//    while (true) {
+//        wait_us(42);
+        raw_adc = readADC();       /* Read AD converted value            */
+        num_readings++;
+    
         
-    }
+//    }
 }
 
 //To sleep, 'wait' should be replaced by 'ThisThread::sleep_for' (C++) or 'thread_sleep_for' (C). If you wish to wait (without sleeping), call 'wait_us'. 'wait_us' is safe to call from ISR context. [since mbed-os-5.14] [-Wdeprecated-declarations] in "main.cpp", Line: 59, Col: 9
@@ -67,12 +66,13 @@
 void mfcc_thread() {
     while (true) {
         //printf("Top of MFCC thread");
-        thread_sleep_for(2000);
-        printf("Readings / second: %i\n\n", num_readings/2);
+        thread_sleep_for(5000);
+        double rate = num_readings/5000.0;
+        pc.printf("Readings / second: %f Ksps\n\n", rate);
         num_readings = 0;
-        pop_val = buff.pop();
-        printf("last reading: %u\n", *pop_val);
-        buff.clear();
+        //pop_val = buff.pop();
+        //pc.printf("last reading: %u\n", *pop_val);
+        //buff.clear();
     }
 }
 
@@ -91,14 +91,15 @@
 DMA_CCRx register
 6. Activate the channel by setting the ENABLE bit in the DMA_CCRx register
 */
-
-void config_dma() {
-    /* 
-    1. Set the peripheral register address in the DMA_CPARx register. The data will be
-    moved from/ to this address to/ from the memory after the peripheral event.
-    */
-    //RCC->DMA_CPAR1 &= 0x00000000;
-}
+//
+//void config_dma() {
+//    /* 
+//    1. Set the peripheral register address in the DMA_CPARx register. The data will be
+//    moved from/ to this address to/ from the memory after the peripheral event.
+//    */
+//    //RCC->DMA_CPAR1 &= 0x00000000;
+//    
+//}
 
 
 
@@ -107,24 +108,21 @@
 
 
 int main() {
-    config_dma();
-    printf("configuring DMA\n");
+//    config_dma();
+    pc.printf("configuring DMA\n");
     
-    printf("Creating buff of size %d\n", BUFFSIZE);
+    pc.printf("Creating buff of size %d\n", BUFFSIZE);
     /* clear the buffer */
-    buff.clear();
-    printf("library read val: %u\n", mic.read_u16());
+//    buff.clear();
+    pc.printf("Setting up ADC\n");
     
-//    /* Setup and initialize ADC converter   https://www.davidkebo.com/microcontroller-interfacing */
-//    RCC->APB2RSTR |=  1 <<  9;             /* Enable ADC1 clock                  */
-//    GPIOA->ARL   &= 0xFFF0FFFF;           /* Configure PC4 as ADC.14 input      */
-//    ADC1->SQR1    = 0x00000000;           /* Regular channel 1 conversion       */
-//    ADC1->SQR2    = 0x00000000;           /* Clear register                     */
-//    ADC1->SQR3    = 14 <<  0;             /* SQ1 = channel 14                   */
-//    ADC1->SMPR1   =  5 << 12;             /* Channel 14 sample time is 55.5 cyc */
-//    ADC1->SMPR2   = 0x00000000;           /* Clear register                     */
-//    ADC1->CR1     =  1 <<  8;             /* Scan mode on                       */
-//    ADC1->CR2     = (1 << 20) |           /* Enable external trigger            */
+    /* Setup and initialize ADC converter   https://www.davidkebo.com/microcontroller-interfacing */
+//    RCC->APB2RSTR |=  1 <<  9;            /* Enable ADC1 clock                  */
+    initADC();
+//    ADC->SMPR1   =  5 << 12;             /* Channel 14 sample time is 55.5 cyc */
+//    ADC->SMPR2   = 0x00000000;           /* Clear register                     */
+//    ADC->CR1     =  1 <<  8;             /* Scan mode on                       */
+//    ADC->CR2     = (1 << 20) |           /* Enable external trigger            */
 //                  (7 << 17) |           /* EXTSEL = SWSTART                   */
 //                  (1 <<  1) |           /* Continuous conversion              */
 //                  (1 <<  0) ;           /* ADC enable                         */
@@ -134,18 +132,18 @@
 //    while (ADC1->CR2 & (1 << 2));         /* Wait for calibration to finish     */
 //    ADC1->CR2    |=  1 << 22;             /* Start first conversion  */
 //    
-//    for (;;) {                            /* Loop forever                       */
-//        if (ADC1->SR & (1 << 1)) {          /* If conversion has finished         */
-//          raw_adc = ADC1->DR & 0x0FFF;       /* Read AD converted value            */
-//          ADC1->CR2 |= 1 << 22;             /* Start new conversion               */ 
-//        }
-//        printf("register read val: %u\n", raw_adc);
-//        thread_sleep_for(2000);
+    
+    //for (;;) {                            /* Loop forever                       */
+//        raw_adc = readADC();
+//        pc.printf("register read val: %u\n", raw_adc);
 //    }
     
     
     
-    while(1);
-    thread_adc.start(adc_thread);
+    
+    read_ADC_ticker.attach_us(&adc_thread, 50);
     thread_mfcc.start(mfcc_thread);
+    while(1){
+        thread_sleep_for(10000);
+    }
 }
\ No newline at end of file