Diff: dmaSPIslave.h

Revision:

0:f0f5102ed9ca

Child:

1:3cceef118195

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dmaSPIslave.h	Wed Jul 15 11:16:13 2015 +0000
@@ -0,0 +1,34 @@
+#ifdef TARGET_KL46Z
+class dmaSPISlave : public SPISlave{
+    public:
+        dmaSPISlave(PinName mosi, PinName miso, PinName sclk, PinName ssel) : SPISlave(mosi, miso, sclk, ssel){
+//            trigger appropriate spi for dma
+            if(_spi.spi == SPI0){
+                read_dma.trigger(Trigger_SPI0_RX);
+            }
+            else{
+                read_dma.trigger(Trigger_SPI1_RX);
+            }
+            
+//            set source for spi slave dma : mosi
+            read_dma.source(&_spi.spi->DL, false);
+        }
+        
+        void bulkRead(uint8_t *read_data, int length){
+//            acquire();
+            _spi.spi->C2 |= SPI_C2_RXDMAE_MASK;
+        
+//            auto increment is true
+            read_dma.destination(read_data, true);
+        
+//            start the read_dma
+            read_dma.start(length);
+
+            while(read_dma.isBusy());
+        
+            _spi.spi->C2 &= ~(SPI_C2_RXDMAE_MASK);
+        }
+    private:
+        SimpleDMA read_dma;
+};
+#endif
\ No newline at end of file