kohacraft Lab
pins change for LPC1114FN28
Fork of
DAC
by 
Jimmy Hack
DAC_SPI.cpp@2:4c97b3c044ec, 2015-08-25 (annotated)
- Committer:
- kohacraft
- Date:
- Tue Aug 25 21:20:45 2015 +0000
- Revision:
- 2:4c97b3c044ec
- Parent:
- 1:679fa19d91b2
ver1.0;
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| JimmyTheHack | 1:679fa19d91b2 | 1 | #ifndef DAC_SPI_CPP |
| JimmyTheHack | 1:679fa19d91b2 | 2 | #define DAC_SPI_CPP |
| JimmyTheHack | 1:679fa19d91b2 | 3 | |
| JimmyTheHack | 1:679fa19d91b2 | 4 | #include "DAC_SPI.h" |
| JimmyTheHack | 1:679fa19d91b2 | 5 | /*SPI Channels */ |
| JimmyTheHack | 1:679fa19d91b2 | 6 | //since we only have two SPI channels, which must be shared, define them here. |
| kohacraft | 2:4c97b3c044ec | 7 | SPI SPI_A(dp2, NC, dp6); //If using with other serial devices, can pass a pointer to the serial channel. |
| kohacraft | 2:4c97b3c044ec | 8 | //SPI SPI_B(p11, NC, p13); |
| JimmyTheHack | 1:679fa19d91b2 | 9 | |
| JimmyTheHack | 1:679fa19d91b2 | 10 | /*Initialize DAC */ |
| JimmyTheHack | 1:679fa19d91b2 | 11 | DAC_SPI::DAC_SPI(int SPIchannelNum, PinName _CS, PinName _LDAC) : CS(_CS), LDAC(_LDAC){ |
| kohacraft | 2:4c97b3c044ec | 12 | //if (SPIchannelNum ==1){ |
| kohacraft | 2:4c97b3c044ec | 13 | // DACspi = &SPI_B; |
| kohacraft | 2:4c97b3c044ec | 14 | //} |
| kohacraft | 2:4c97b3c044ec | 15 | //else{ |
| JimmyTheHack | 1:679fa19d91b2 | 16 | DACspi = &SPI_A; |
| kohacraft | 2:4c97b3c044ec | 17 | //} |
| JimmyTheHack | 1:679fa19d91b2 | 18 | messageBits(16); |
| JimmyTheHack | 1:679fa19d91b2 | 19 | } |
| JimmyTheHack | 1:679fa19d91b2 | 20 | |
| JimmyTheHack | 1:679fa19d91b2 | 21 | /** Manually change the SPI frequency |
| JimmyTheHack | 1:679fa19d91b2 | 22 | * Must be a value supported by the mbed and DAC |
| JimmyTheHack | 1:679fa19d91b2 | 23 | */ |
| JimmyTheHack | 1:679fa19d91b2 | 24 | void DAC_SPI::frequency(int freq){ |
| JimmyTheHack | 1:679fa19d91b2 | 25 | (*DACspi).frequency(freq); |
| JimmyTheHack | 1:679fa19d91b2 | 26 | } |
| JimmyTheHack | 1:679fa19d91b2 | 27 | |
| JimmyTheHack | 1:679fa19d91b2 | 28 | |
| JimmyTheHack | 1:679fa19d91b2 | 29 | //specify the number of bits used in message packets to the DAC. |
| JimmyTheHack | 1:679fa19d91b2 | 30 | void DAC_SPI::messageBits(int bits){ |
| JimmyTheHack | 1:679fa19d91b2 | 31 | (*DACspi).format(bits,0); |
| JimmyTheHack | 1:679fa19d91b2 | 32 | } |
| JimmyTheHack | 1:679fa19d91b2 | 33 | |
| JimmyTheHack | 1:679fa19d91b2 | 34 | //select a DACnum for use with chips with multiple onboard DACs. |
| JimmyTheHack | 1:679fa19d91b2 | 35 | void DAC_SPI::select(char DACnum){ |
| JimmyTheHack | 1:679fa19d91b2 | 36 | DACselect=DACnum; |
| JimmyTheHack | 1:679fa19d91b2 | 37 | } |
| JimmyTheHack | 1:679fa19d91b2 | 38 | |
| JimmyTheHack | 1:679fa19d91b2 | 39 | #endif //DAC_SPI_CPP |