Diff: main.cpp

Revision:

0:4b9437bac3eb

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri May 12 10:27:39 2017 +0000
@@ -0,0 +1,84 @@
+#include "mbed.h"
+#include "SimpleDMA.h"
+
+DigitalOut led1(LED_GREEN);
+SimpleDMA dma(0);
+RawSerial pc(USBTX, USBRX);
+
+AnalogIn light_sensor(PTE22);
+
+EventQueue queue(32*EVENTS_EVENT_SIZE);
+
+char characters[] = "abcdefgh\r\n";     //Characters we send
+char characters2[sizeof(characters)];   //Second buffer
+
+void blink() 
+{
+    led1 = !led1;
+}
+   
+void DMA_Done()
+{    
+    pc.printf("Done!!");
+}   
+
+void DMA_UART_Done(int channel)
+{
+    DMA_Done();
+}   
+
+void DMA_UART_Start()
+{
+    //Now to UART, enable DMA in UART, destination is now
+    //a fixed address, so address pointer should not be incremented,
+    //thus second argument is false. Also set trigger to UART0_RX.
+    //This sends a new value to the UART as soon as it is possible
+    #ifdef TARGET_LPC1768
+    LPC_UART0->FCR |= 1<<3;
+    dma.destination(&LPC_UART0->THR, false);
+    #endif
+    #ifdef TARGET_KL46Z
+    UART0->C5 |= (1<<7) | (1<<5);
+    dma.destination(&UART0->D, false);
+    #endif
+    dma.source(characters2, true);
+    dma.trigger(Trigger_UART0_TX);
+    dma.attach(queue.event(DMA_UART_Done));
+
+    dma.start(sizeof(characters));
+}   
+ 
+void DMA_Memcpy_Done(osThreadId id, int channel)
+{
+    osSignalSet(id, 0x01);     
+}
+    
+void DMA_Memcpy_Start()
+{                
+    pc.printf("Start\r\n");    
+    pc.printf("Use DMA to send 10 characters from buffer to buffer\r\n");
+    pc.printf("Then send them to UART0 (PC)\r\n");
+    
+    osThreadId id = Thread::gettid();
+    
+    //Set source and destination, second argument is true since
+    //we should run through both arrays
+    dma.source(characters, true);
+    dma.destination(characters2, true);
+    dma.attach(mbed::callback(DMA_Memcpy_Done, id));
+ 
+    //Start transfer of 10 characters
+    dma.start(10);     
+    
+    // And wait for the signal to arrive
+    Thread::signal_wait(0x1);        
+    pc.printf("Memcpy transfer done\n\r");
+    
+}
+
+int main() 
+{
+    queue.call_every(300, blink);    
+    queue.call(DMA_Memcpy_Start);
+    queue.dispatch();  
+}