Siva ram
test
Dependencies: SimpleDMA mbed-rtos mbed
Fork of
spiDMAtest
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Siva ram
Revision 0:f0f5102ed9ca, committed 2015-07-15
- Comitter:
- shreeshas95
- Date:
- Wed Jul 15 11:16:13 2015 +0000
- Child:
- 1:3cceef118195
- Commit message:
- working dma without interrupt
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SimpleDMA.lib Wed Jul 15 11:16:13 2015 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/Sissors/code/SimpleDMA/#876f3b55e6f5
--- /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
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Jul 15 11:16:13 2015 +0000
@@ -0,0 +1,35 @@
+#include "mbed.h"
+#include "rtos.h"
+#include "SimpleDMA.h"
+#include "dmaSPIslave.h"
+
+dmaSPISlave spi(PTA16, PTA17, PTA15, PTA14);
+RawSerial pc(USBTX, USBRX);
+DigitalOut ledg(LED_GREEN);
+
+int main(){
+ pc.baud(9600);
+ pc.printf("inside main\r\n");
+ spi.format(8,3);
+ spi.frequency(1000000);
+
+ uint8_t buffer[100] = {0};
+ pc.printf("welcome to dma test, start sending data now\r\n");
+
+// int i = 0;
+// while(i < 100){
+// if(spi.receive()){
+// buffer[i] = spi.read();
+// ++i;
+// ledg = !ledg;
+// }
+// }
+ spi.bulkRead(buffer, 100);
+
+ for(int i = 0 ; i < 100 ; ++i){
+ pc.printf("%02x ", buffer[i]);
+ }
+ pc.printf("\r\n");
+
+ return 0;
+}
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-rtos.lib Wed Jul 15 11:16:13 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed-rtos/#5aed8bae1001
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Wed Jul 15 11:16:13 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/da0ca467f8b5 \ No newline at end of file