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:
- 19:c2b753533b93
- Parent:
- 18:4a29cad91540
- Child:
- 20:2d5cd38047ca
diff -r 4a29cad91540 -r c2b753533b93 mmSPI.cpp
--- a/mmSPI.cpp Mon Aug 19 20:45:29 2013 +0000
+++ b/mmSPI.cpp Mon Aug 19 23:05:29 2013 +0000
@@ -270,12 +270,17 @@
// a CPU register.
char mmSPI::read_register(char cRegister, char * pcReceive, char * pcSend)
{
- int dLoop; // send all 0.
+ int dLoop;
+ // int dComplement;
+
+ // dComplement = 7 - (int) cRegister;
+
+ // send all 0.
for (dLoop = 0; dLoop < 8; dLoop++) pcSend[dLoop] = 0x00;
transceive_vector2(pcReceive, pcSend, 8); // snap & scan-out reg contents.
- return (pcReceive[cRegister]); // return the particular reg value.
+ return (pcReceive[6 - cRegister]); // return the particular reg value.
}
//----------------------------------------------//------------------------------
void mmSPI::write_memory(char cHData, char cLdata, char cAddress, char * pcReceive, char * pcSend)
@@ -284,28 +289,41 @@
// clear transmit vector.
for (dLoop = 0; dLoop < 8; dLoop++) pcSend[dLoop] = 0x00;
+
+ /*
+ CTRL = 7
+ R0 = 6
+ R1 = 5
+ R2 = 4
+ R3 = 3
+ PC = 2
+ IR-H = 1
+ IR-L = 0
+*/
+
// R3 <- address.
// R2 <- high-data.
// R1 <- low-data.
write_register(0x03,cAddress, pcReceive, pcSend);
- write_register(0x02,cHData, pcReceive, pcSend);
- write_register(0x01,cLdata, pcReceive, pcSend);
+ read_register(0x03,pcReceive,pcSend);
+
+ // write_register(0x04,cHData, pcReceive, pcSend);
+ // write_register(0x05,cLdata, pcReceive, pcSend);
- pcSend[7] = 0x02; // write-enable high.
- pcSend[1] = 0x02;
- pcSend[0] = 0x00;
-
+// pcSend[7] = 0x02; // write-enable high.
+// pcSend[1] = 0x02;
+ // pcSend[0] = 0x00;
+ // transceive_vector2(pcReceive, pcSend, 8);
- transceive_vector2(pcReceive, pcSend, 8);
-
- pcSend[7] = 0x02; // write-enable low.
- pcSend[1] = 0x00;
- pcSend[0] = 0x00;
- transceive_vector2(pcReceive, pcSend, 8);
+// pcSend[7] = 0x02; // write-enable low.
+// pcSend[1] = 0x00;
+ // pcSend[0] = 0x00;
+ // transceive_vector2(pcReceive, pcSend, 8);
// clear transmit vector.
for (dLoop = 0; dLoop < 8; dLoop++) pcSend[dLoop] = 0x00;
+
}
//----------------------------------------------//------------------------------
// fetch a word from main memory.
@@ -319,22 +337,35 @@
// clear transmit vector.
for (dLoop = 0; dLoop < 8; dLoop++) pcSend[dLoop] = 0x00;
+ /*
+ CTRL = 7
+ R0 = 6
+ R1 = 5
+ R2 = 4
+ R3 = 3
+ PC = 2
+ IR-H = 1
+ IR-L = 0
+*/
+
+
+
// R3 <- address.
write_register(0x03,cAddress, pcReceive, pcSend);
pcSend[7] = 0x02; // mbed sends command.
- pcSend[1] = 0x68; // R2 <- MM[R3]
+ pcSend[1] = 0xD0; // R2 <- MM[R3]
pcSend[0] = 0x00;
transceive_vector2(pcReceive, pcSend, 8); // send command.
pcSend[7] = 0x02; // mbed sends command.
- pcSend[1] = 0x64; // R1 <- MM[R3]
+ pcSend[1] = 0xD1; // R1 <- MM[R3]
pcSend[0] = 0x00;
transceive_vector2(pcReceive, pcSend, 8); // send command.
// obtain MM content.
- cHData = read_register(0x02, pcReceive, pcSend);
- cLData = read_register(0x01, pcReceive, pcSend);
+ cHData = read_register(0x04, pcReceive, pcSend);
+ cLData = read_register(0x05, pcReceive, pcSend);
udMemoryContent = (cHData << 8) + cLData; // build the memory word.