Diff: amc7812b.cpp

Revision:

0:4ad7f160d354

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/amc7812b.cpp	Thu May 03 19:58:54 2018 +0000
@@ -0,0 +1,89 @@
+/*******************************************************
+*
+* Texas Instruments AMC7812B library
+*
+* Author: Mauricio Donatti
+* E-mail: mauricio.donatti@lnls.br
+*
+* March 2018
+*
+*******************************************************/
+
+#include "amc7812b.h"
+
+//OLD FUNCTIONS
+//They are not used anymore - New functions inside main.cpp are more efficient
+
+/*
+void AMC_write(SPI spi, DigitalOut cs, uint8_t reg,uint8_t* data)
+{
+        cs = 0; // Select the device by seting chip select low
+        spi.write((reg<<4)|((data[1]&0xF0)>>4));
+        spi.write((data[0])|((data[1]&0xF)<<8));
+        cs = 1; // Deselect the device by seting chip select low    
+}
+
+void AMC_read(SPI spi, DigitalOut cs, uint8_t reg,uint8_t* data)
+{
+        uint16_t tmp;
+        cs = 0; // Select the device by seting chip select low
+        //spi.write(reg|0x80);
+        //spi.write(0x00);
+        //spi.write(0x00);
+        spi.write((reg|0x80)<<4);
+        spi.write(0x000);
+        cs = 1; // Deselect the device by seting chip select low
+        cs = 0; // Select the device by seting chip select low
+        tmp = spi.write((reg|0x80)<<4);
+        data[1] = (tmp&0xF)<<4;
+        tmp = spi.write(0x000);
+        data[1] = data[1]|((tmp&0xF00)>>8);
+        data[0] = tmp&0xFF;
+        //data[1] = spi.write(0x000);
+        //data[0] = spi.write(0x00);
+        cs = 1; // Deselect the device by seting chip select low       
+}
+
+//read_fast saves the data of the previous read_fast call 
+void AMC_read_fast(SPI spi, DigitalOut cs, uint8_t reg,uint8_t* data)
+{
+        uint16_t tmp;
+
+        cs = 0; // Select the device by seting chip select low
+        tmp = spi.write((reg|0x80)<<4);
+        data[1] = (tmp&0xF)<<4;
+        tmp = spi.write(0x000);
+        data[1] = data[1]|((tmp&0xF00)>>8);
+        data[0] = tmp&0xFF;
+        //spi.write(reg|0x80);
+        //data[1] = spi.write(0x00);
+        //data[0] = spi.write(0x00);
+        cs = 1; // Deselect the device by seting chip select low    
+}
+
+
+//read_fast saves the data of the previous read_fast call 
+void AMC_my_read(SPI spi, DigitalOut cs, uint8_t reg,uint8_t* data)
+{
+        uint16_t tmp;
+        cs = 0; // Select the device by seting chip select low
+        //spi.write(reg|0x80);
+        //data[1] = spi.write(0x00);
+        //data[0] = spi.write(0x00);
+        
+        //while (!(LPC_SSP1->SR & 2)); //if TNF-Bit = 0 (FIFO full); TNF-Bit is Bit 1 in SSPxSR
+        LPC_SSP1->DR = (reg|0x80)<<4;  // write to FIFO data register
+        while( !(LPC_SSP1->SR & 4));
+        tmp = LPC_SSP1->DR;  // hopefully the compiler won't optimize this
+        data[1] = (tmp&0xF)<<4;
+        //while (!(LPC_SSP1->SR & 2)); //if TNF-Bit = 0 (FIFO full); TNF-Bit is Bit 1 in SSPxSR
+        LPC_SSP1->DR = 0x000;  // write to FIFO data register
+        while( !(LPC_SSP1->SR & 4));  
+        //while ( (LPC_SSP1->SR & (SSPSR_BSY|SSPSR_RNE)) != SSPSR_RNE ); 
+        tmp = LPC_SSP1->DR;  // hopefully the compiler won't optimize this
+        data[1] = data[1]|((tmp&0xF00)>>8);
+        data[0] = tmp&0xFF;
+                
+        cs = 1; // Deselect the device by seting chip select low    
+}
+*/
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