Takashi Matsuoka
Potentiometer AD5204,AD5206 library.
Diff: MjAD520x.cpp
- Revision:
- 0:1d45c35a717b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/MjAD520x.cpp Sun Oct 18 05:12:59 2015 +0000
@@ -0,0 +1,27 @@
+#include "MjAD520x.h"
+
+MjAD520x::MjAD520x(PinName mosi, PinName miso, PinName sclk, PinName cs_n, int terminalResistance)
+ : HwSpi(mosi, miso, sclk), HwCs_n(cs_n, 1)
+{
+ TerminalResistance = terminalResistance;
+
+ HwSpi.format(11, 0);
+ HwSpi.frequency(1000000);
+}
+
+void MjAD520x::write(int channel, int resistance)
+{
+ write_u8(channel, resistance <= TerminalResistance ? resistance * 255 / TerminalResistance : 255);
+}
+
+void MjAD520x::write_u8(int channel, uint8_t value)
+{
+ HwCs_n.write(0);
+ wait_us(1);
+
+ HwSpi.write(channel << 8 | value);
+
+ HwCs_n.write(1);
+ wait_us(1);
+}
+