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:
- 15:d6cc57c4e23d
- Parent:
- 14:35717622a4fb
- Child:
- 16:0e422fd263c6
--- a/mmSPI.cpp Sun Aug 18 04:50:54 2013 +0000
+++ b/mmSPI.cpp Mon Aug 19 04:41:29 2013 +0000
@@ -8,9 +8,14 @@
/*----------------------------------------------//------------------------------
------------------------------------------------//----------------------------*/
//==============================================//==============================
+// consider resetting the fpga around here, because
+// the micro may be wiggling these signals before here.
mmSPI::mmSPI() // constructor.
{
allocations(); // object allocations.
+
+ *pSCLK = 0; // initialize.
+ *pCPUclk = 0; // initialize.
}
//----------------------------------------------//------------------------------
mmSPI::~mmSPI() // destructor.
@@ -57,10 +62,11 @@
*pSCLK = 0; // SPI clock negedge.
wait(fSPIquarterP); // until middle of clock low.
*pMOSI = (*cSend >> dLoop01) & 1; // assert MOSI.
- wait(fSPIquarterP); // MOSI setup time
+ // capture MISO.
+ *cReceive = *cReceive | (*pMISO << dLoop01);
+ wait(fSPIquarterP); // finish-out cycle.
*pSCLK = 1; // SPI clock posedge.
- wait(fSPIquarterP); // MISO setup time.
- *cReceive = *cReceive | (*pMISO << dLoop01);
+ wait(fSPIquarterP); // finish-out cycle.
wait(fSPIquarterP); // finish-out cycle.
}
}
@@ -87,7 +93,7 @@
for (dLoop02 = (cNumBytes - 1); dLoop02 >= 0; dLoop02--)
transceive_byte(&(cReceive[dLoop02]), &(cSend[dLoop02]));
- *pSCLK = 0; // SPI clock rests low.
+
*pCPUclk = 1; // pulse the CPU clock.
wait(fSPIquarterP);
@@ -112,15 +118,78 @@
}
}
//----------------------------------------------//------------------------------
+ void mmSPI::force_write(char cDataHIgh, char cDataLow, char cAddress)
+ {
+ char pcReceive[8];
+ char pcSend [8];
+ int dLoop;
+
+ for (dLoop = 0; dLoop < 8; dLoop++) pcSend[dLoop] = 0;
+
+
+ // high data to R2.
+ pcSend[7] = 0x02; pcSend[1] = 0xA8; pcSend[0] = cDataHIgh;
+ transceive_vector(pcReceive, pcSend, 8);
-
-
-
+ // low data to R1.
+ pcSend[7] = 0x02; pcSend[1] = 0xA4; pcSend[0] = cDataLow;
+ transceive_vector(pcReceive, pcSend, 8);
+
+
+ // address to R3.
+ pcSend[7] = 0x02; pcSend[1] = 0xAC; pcSend[0] = cAddress;
+ transceive_vector(pcReceive, pcSend, 8);
+
+
+
+ pcSend[7] = 0x02; pcSend[1] = 0x02; pcSend[0] = 0; // WE high.
+ transceive_vector(pcReceive, pcSend, 8);
+
+ pcSend[7] = 0x02; pcSend[1] = 0x00; pcSend[0] = 0; // WE low.
+ transceive_vector(pcReceive, pcSend, 8);
+
+ }
+//----------------------------------------------//------------------------------
-
-
-
+ void mmSPI::force_read(char cAddress)
+ {
+ char pcReceive[8];
+ char pcSend [8];
+ int dLoop;
+
+ for (dLoop = 0; dLoop < 8; dLoop++) pcSend[dLoop] = 0;
+
+
+
+
+ // address to R3.
+ pcSend[7] = 0x02; pcSend[1] = 0xAC; pcSend[0] = cAddress;
+ transceive_vector(pcReceive, pcSend, 8);
+
+ // R2 gets data-H from memory.
+ pcSend[7] = 0x02; pcSend[1] = 0xC8; pcSend[0] = cAddress;
+ transceive_vector(pcReceive, pcSend, 8);
+
+ // R1 gets data-L from memory.
+ pcSend[7] = 0x02; pcSend[1] = 0xC4; pcSend[0] = cAddress;
+ transceive_vector(pcReceive, pcSend, 8);
+
+
+
+
+ // pcSend[7] = 0x02; // force IR.
+// pcSend[1] = 0xA4; // R1 <- immediate.
+// pcSend[0] = 0xEE; // immediate value.
+ /// transceive_vector(pcReceive, pcSend, 8);
+
+
+
+ // no-op scan.
+ pcSend[7] = 0x02; pcSend[1] = 0x0; pcSend[0] = 0;
+ transceive_vector(pcReceive, pcSend, 8);
+
+ }
//----------------------------------------------//------------------------------
@@ -134,3 +203,15 @@
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