Diff: dumb_i2c.cpp

Revision:

0:5306d38db3c9

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dumb_i2c.cpp	Fri Jul 22 05:53:29 2016 +0000
@@ -0,0 +1,61 @@
+#include "mbed.h"
+#include "dumb_i2c.h"
+
+DUMB_I2C::DUMB_I2C(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr<<1) {
+    // activate the peripheral
+    freq = 100000 ; /* 100KHz */
+    m_i2c.frequency(freq) ;
+}
+
+DUMB_I2C::~DUMB_I2C() { }
+
+uint8_t DUMB_I2C::address(void)
+{
+    return( m_addr >> 1 ) ;
+}
+
+void DUMB_I2C::frequency(uint32_t f)
+{
+    freq = f ;
+    m_i2c.frequency(freq) ;
+}
+
+uint32_t DUMB_I2C::frequency(void)
+{
+    return(freq) ;
+}
+
+int DUMB_I2C::read(int addr, uint8_t *data, int len) 
+{
+    int result ;
+    result = readRegs(addr, data, len) ;
+    return( result ) ;
+}
+
+int DUMB_I2C::write(int addr, uint8_t *data, int len) 
+{
+    uint8_t *buf ;
+    int ack ;
+    buf = new uint8_t[len+1] ;
+    buf[0] = addr ;
+    for (int i = 0 ; i < len ; i++ ) {
+        buf[i+1] = data[i] ;
+    }
+    ack = writeRegs(buf, len+1) ;
+    delete buf ;
+    return( ack ) ;
+}
+
+int DUMB_I2C::readRegs(int addr, uint8_t * data, int len) {
+    int result ;
+    char t[1] = {addr};
+    m_i2c.write(m_addr, t, 1, true);
+    result = m_i2c.read(m_addr, (char *)data, len);
+    return( result ) ;
+}
+
+int DUMB_I2C::writeRegs(uint8_t * data, int len) {
+    int ack ;
+    ack = m_i2c.write(m_addr, (char *)data, len);
+    return( ack ) ;
+}
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