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i2c: fix I2c::read() call

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Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Brendan Le Foll
2014-11-20 14:10:56 +00:00
parent 19d7dad364
commit 75be9992fd
2 changed files with 3 additions and 3 deletions
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4
api/mraa/i2c.hpp
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@@ -120,9 +120,9 @@ class I2c {
* @param length Size of read in bytes to make
* @return pointer to std::string
*/
std::string read(int length, uint8_t command) {
std::string read(int length) {
uint8_t* data = (uint8_t*) malloc(sizeof(uint8_t) * length);
mraa_i2c_read(m_i2c, data, command, length);
mraa_i2c_read(m_i2c, data, length);
std::string str((char*)data, length);
free(data);
return str;

2
examples/i2c_HMC5883L.c
View File

@@ -116,7 +116,7 @@ main(int argc, char **argv)
// chosen register
mraa_i2c_address(i2c, HMC5883L_I2C_ADDR);
// this call behaves very similarly to the Wire receive() call
mraa_i2c_read(i2c, rx_tx_buf, HMC5883L_DATA_REG, DATA_REG_SIZE);
mraa_i2c_read(i2c, rx_tx_buf, DATA_REG_SIZE);
x = (rx_tx_buf[HMC5883L_X_MSB_REG] << 8 ) | rx_tx_buf[HMC5883L_X_LSB_REG] ;
z = (rx_tx_buf[HMC5883L_Z_MSB_REG] << 8 ) | rx_tx_buf[HMC5883L_Z_LSB_REG] ;