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i2c.hpp: new read() variant that returns terminated std::string

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Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Brendan Le Foll
2014-08-05 10:18:14 +01:00
parent 9d488c8e86
commit e7bda80013
1 changed files with 10 additions and 8 deletions
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18
api/mraa/i2c.hpp
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@@ -95,20 +95,22 @@ class I2c {
* @param length Size of read
* @return length of the read or 0 if failed
*/
int read(char * data, size_t length) {
int read(char *data, size_t length) {
return mraa_i2c_read(m_i2c, (uint8_t*) data, (int) length);
}
/**
* Read length bytes from the bus, this function will allocate memory
* and will require you to free the returned pointer
* Read length bytes from the bus, and return as a std::string note
* that this is not a null terminated string
*
* @param length Size of read to make
* @return pointer to read data which must be freed
* @return pointer to std::string
*/
uint8_t* read(size_t length) {
uint8_t* data = (uint8_t*) malloc(sizeof(uint8_t) * length);
mraa_i2c_read(m_i2c, data, (int) length);
return data;
std::string read(size_t length) {
char* data = (char*) malloc(sizeof(char) * length);
mraa_i2c_read(m_i2c, (uint8_t*) data, (int) length);
std::string str(data, (int) length);
free(data);
return str;
}
/**
* Write one byte to the bus