Diff: ADS1248.cpp

Revision:

0:e015f99b8dfb

Child:

1:d62be7487e9d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ADS1248.cpp	Wed Sep 17 08:20:38 2014 +0000
@@ -0,0 +1,137 @@
+#include "ADS1248.h"
+
+//***********************************/************************************
+//                         Constructors                                 //
+//***********************************/************************************
+ADS1248::ADS1248(SPI& spi, PinName cs, PinName rdy, PinName start):_spi(spi),_cs(cs),_rdy(rdy),_start(start){
+      
+    _cs = 0;
+    _start = 1; 
+    _spi.format(8,1);
+    wait(0.016);
+    _cs = 1;
+}
+
+//***********************************/************************************
+//                             Public Methods                           //
+//***********************************/************************************ 
+void ADS1248::start(bool en){
+    _start = en;
+}
+
+void ADS1248::waitReady(void){
+    while(!_rdy);
+    while(_rdy);
+}
+
+void ADS1248::sleep(bool en){
+    _start = 1;
+    _cs = 0;
+    _spi.write(en<<1);
+    wait_us(1);
+    _cs = 1;
+    waitReady();
+}
+
+void ADS1248::sync(void){
+    _start = 1;  
+    _cs = 0;
+    _spi.write(SYNC);
+    _spi.write(SYNC);
+    wait_us(1);
+    _cs = 1;   
+}
+
+void ADS1248::reset(void){
+    _start = 1;  
+    _cs = 0;
+    _spi.write(RESET);
+    wait_us(1);
+    _cs = 1; 
+    wait_us(600);    
+}
+
+
+int ADS1248::read(void){
+    int data;    
+    _start = 1;
+    waitReady();
+    _cs = 0;
+    _spi.write(RDATA);
+    data = ((_spi.write(0)<<24)&0xFF000000);
+    data |=((_spi.write(0)<<16)&0x00FF0000);
+    data |=((_spi.write(0)<< 8)&0x0000FF00);
+    data >>= 8;
+    data &= 0xfffffff8;
+    wait_us(1);
+    _cs = 1;
+    wait_us(1);
+    return data;
+}
+
+ADS1248::operator int(){
+    return read();
+}
+
+
+void ADS1248::readReg(unsigned char reg, unsigned char *buff, int len){
+    _start = 1;
+    _cs = 0;
+    _spi.write(RREG|(reg&0x0F));
+    _spi.write(len-1);
+    while(len--){
+        *(buff++) = _spi.write(0);
+    }wait_us(1);
+    _cs = 1;
+    wait_us(1);
+}
+
+unsigned char ADS1248::readReg(unsigned char reg){
+    unsigned char ret;
+    readReg(reg,&ret,1);
+    return ret;
+}
+
+void ADS1248::writeReg(unsigned char reg, const unsigned char *buff, int len){
+    _start = 1;
+    _cs = 0;
+    _spi.write(WREG|(reg&0x0F));
+    _spi.write(len-1);
+    while(len--){
+        _spi.write(*(buff++));
+    }wait_us(1);
+    _cs = 1;
+    wait_us(1);
+}
+
+void ADS1248::writeReg(unsigned char reg, unsigned char val){
+    writeReg(reg,&val,1);
+}
+
+void ADS1248::systemOffsetCal(void){
+    _start = 1;
+    _cs = 0;
+    _spi.write(SYSOCAL);
+    wait_us(1);
+    _cs = 1;
+    waitReady();
+}
+
+void ADS1248::systemGainCal(void){
+    _start = 1;
+    _cs = 0;
+    _spi.write(SYSGCAL);
+    wait_us(1);
+    _cs = 1;
+    waitReady();  
+}
+
+void ADS1248::selfOffsetCal(void){
+    _start = 1;
+    _cs = 0;
+    _spi.write(SELFOCAL);
+    wait_us(1);
+    _cs = 1;
+    waitReady();
+}
+