Revision 3:e59d61aac1e1, committed 2016-04-22

Comitter:

shreeshas95

Date:

Fri Apr 22 17:58:23 2016 +0000

Parent:

2:16545dbc88ae

Child:

4:33fc4fec3087

Commit message:

added new function restart

Changed in this revision

--- a/dmaSPIslave.h	Thu Jul 16 05:40:25 2015 +0000
+++ b/dmaSPIslave.h	Fri Apr 22 17:58:23 2016 +0000
@@ -38,7 +38,10 @@
             
 //            attach interrupt function
             read_dma.attach(fun);
-
+        }
+        
+        void bulkRead_restart(){
+            _spi.spi->C2 |= SPI_C2_RXDMAE_MASK;
         }
         
 /*

--- a/main.cpp	Thu Jul 16 05:40:25 2015 +0000
+++ b/main.cpp	Fri Apr 22 17:58:23 2016 +0000
@@ -2,23 +2,34 @@
 #include "SimpleDMA.h"
 #include "dmaSPIslave.h"
 
-#define PAYLOAD_LENGTH 1024
+#define PAYLOAD_LENGTH 6723
 
-dmaSPISlave spi(PTA16, PTA17, PTA15, PTA14);
+#define PAY_SPI_MOSI PTE18
+#define PAY_SPI_MISO PTE19
+#define PAY_SPI_CLK PTE17
+#define PAY_SPI_CS PTE16
+
+dmaSPISlave spi(PAY_SPI_MOSI, PAY_SPI_MISO, PAY_SPI_CLK, PAY_SPI_CS);
 RawSerial pc(USBTX, USBRX);
-DigitalOut ledg(LED_GREEN);
+//DigitalOut ledg(LED_GREEN);
+//DigitalOut ledr(LED_RED);
 
 bool flag = false;
 
 void do_this(void){
     flag = true;
 }
+void do_this2(void){
+    flag = true;
+}
 
 int main(){
-    pc.baud(9600);
+//    ledr = 1;
+//    ledg = 1;
+    pc.baud(1200);
     pc.printf("inside main\r\n");
     spi.format(8,0);
-    spi.frequency(10000000);
+    spi.frequency(1000000);
     
     uint8_t buffer[PAYLOAD_LENGTH] = {0};
     pc.printf("welcome to dma test, start sending data now\r\n");
@@ -27,19 +38,45 @@
     spi.bulkRead_init(buffer, PAYLOAD_LENGTH, &do_this);
 //    start dma read
     spi.bulkRead_start();
+    int count = 0;
     
     while(true){
+//        int i = 0;
+//        while(i < PAYLOAD_LENGTH){
+//            if(spi.receive()){
+//                buffer[i] = spi.read();
+//                ++i;
+//            }
+//        }
+//        ledr = !ledr;
+//        for(int j = 0 ; j < PAYLOAD_LENGTH ; ++j){
+//            printf("%02x ", buffer[j]);
+//        }
+
+        
         if(flag){
+            count++;
             flag = false;
-            ledg = !ledg;
+//            ledg = !ledg;
 
 //            for(int i = 0 ; i < PAYLOAD_LENGTH ; ++i){
 //                pc.printf("%02x ", buffer[i]);
 //            }
-//            pc.printf("\r\n");
-
+            pc.printf("DATA RECEIVED\r\n");
+            
 //            start dma again after handling the data
-            spi.bulkRead_start();
+            if(count == 3){
+                count = 0;
+                spi.bulkRead_end();
+                pc.printf("tried END\r\n");
+                wait(1);
+                pc.printf("restarting the procedure\r\n");
+                spi.bulkRead_restart();
+                spi.bulkRead_start();
+            }
+            else{
+                spi.bulkRead_start();
+            }
         }
     }