Diff: main.cpp

Revision:

0:5b2cf8f997d8

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Nov 05 08:41:34 2014 +0000
@@ -0,0 +1,43 @@
+#include "mbed.h"
+
+#define DAC_ADDR (0xc0)
+
+I2C i2c(I2C_SDA, I2C_SCL);
+ 
+ 
+Serial pc(SERIAL_TX, SERIAL_RX);
+
+bool mcp4728_setChannel(uint8_t channel, bool UseInternalVRef, uint8_t powerDownMode, bool use2xGain, uint16_t value){
+    char buf[3];
+    buf[0] = 0x40 | ((channel & 0x3) << 1);
+    
+    buf[1] = ((uint8_t)UseInternalVRef << 7) | ((powerDownMode & 0x3) << 5) | ((uint8_t)use2xGain << 4);
+    buf[1] |= (value & 0x0f00)>>8;
+    
+    buf[2] = value & 0xff;
+    
+    return i2c.write(DAC_ADDR, buf, 3, 0) == 0;
+}
+
+int dac_test(void){
+    static uint16_t value = 0;
+    int ret;
+    
+    ret = mcp4728_setChannel(0, 0, 0, 0, value);
+    value++;
+    if(!ret) return -2;
+    
+    return 1;
+}
+
+int main()
+{
+ 
+    printf("Hello DAC MCP4728\n");
+    while (1) {
+        pc.printf("dac_test: %i\n", dac_test());
+        wait(0.1);
+    }
+ 
+}
+