Mike Moore
This is an involuntary fork, created because the repository would not update mmSPI. SPI library used to communicate with an altera development board attached to four zigbee-header pins.
Dependents: Embedded_RTOS_Project
Fork of
mmSPI
by 
Mike Moore
Diff: mmSPI.cpp
- Revision:
- 5:b14dcaae260e
- Parent:
- 4:aa1fe8707bef
- Child:
- 6:b480fc4e87e5
diff -r aa1fe8707bef -r b14dcaae260e mmSPI.cpp
--- a/mmSPI.cpp Wed Aug 14 14:47:12 2013 +0000
+++ b/mmSPI.cpp Wed Aug 14 15:13:05 2013 +0000
@@ -41,11 +41,31 @@
}
//----------------------------------------------//------------------------------
- char mmSPI::transceive_byte(char cSend) // send/receive a byte.
+// we're not going for speed, so lets go for good setup / hold.
+ void mmSPI::transceive_byte(void) // send/receive a byte.
{
- *pSCLK = 1;
-
-
-
+ cReceive = 0; // clear receive byte.
+ for (cLoop01 = 7; cLoop01 >= 0; cLoop01++)// loop for 8 bits in the byte.
+ {
+ *pSCLK = 0; // SPI clock negedge.
+ wait(fSPIquarterP); // until middle of clock low.
+ *pMOSI = (cSend >> cLoop01) & 1; // assert MOSI.
+ wait(fSPIquarterP); // MOSI setup time
+ *pSCLK = 1; // SPI clock posedge.
+ wait(fSPIquarterP); // MISO setup time.
+ cReceive = cReceive | (*pMISO << cLoop01);
+ wait(fSPIquarterP); // finish-out cycle.
+ }
}
-//----------------------------------------------//------------------------------
\ No newline at end of file
+//----------------------------------------------//------------------------------
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