Diff: SPIDAC.cpp

Revision:

0:8a420ac6394e

diff -r 000000000000 -r 8a420ac6394e SPIDAC.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SPIDAC.cpp	Mon Jun 19 15:55:51 2017 +0000
@@ -0,0 +1,39 @@
+#include "mbed.h"
+//#include "Thread.h"
+#include "SPIDAC.h"
+
+DigitalOut spiChipSelect(p8, 1);
+spi_t spi;
+
+void SPIDACInitialize(void)
+{
+    // Setup the output pins for the SPI chip
+    spi_init(&spi, p5, p6, p7, NC);
+    // Set the format for the registers
+    spi_format(&spi, 16, 2, 0);
+    // Set the comm frequency
+    spi_frequency(&spi, 1000000);
+    
+    // Set the initial values
+    SPIDACSend(0, 0);
+}
+
+void SPIDACSend(uint16_t aValue, uint16_t bValue)
+{
+    // First write the bValue to the B buffer
+    spiChipSelect = 0;
+    spi_master_write(&spi, ((bValue & 0xFFF) | (0x5000)));
+    while( spi_busy(&spi) )
+        continue;
+    spiChipSelect = 1;
+    
+    // Pause
+    rtos::Thread::wait(1);
+    
+    // Now write the aValue to A and move the B buffer to B register
+    spiChipSelect = 0;
+    spi_master_write( &spi, ((aValue & 0xFFF) | (0xC000)));
+    while (spi_busy(&spi))
+        continue;
+    spiChipSelect = 1;
+}