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i2c: Add exceptions for C++ i2c errors

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Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Brendan Le Foll
2016-04-22 11:58:57 +01:00
parent 0b74aa68ab
commit 1e4516d026
1 changed files with 20 additions and 3 deletions
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23
api/mraa/i2c.hpp
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@@ -103,12 +103,17 @@ class I2c
/** /**
* Read exactly one byte from the bus * Read exactly one byte from the bus
* *
* @throws std::invalid_argument in case of error
* @return char read from the bus * @return char read from the bus
*/ */
uint8_t uint8_t
readByte() readByte()
{ {
return (uint8_t) mraa_i2c_read_byte(m_i2c); int x = mraa_i2c_read_byte(m_i2c);
if (x == -1) {
throw std::invalid_argument("Unknown error in I2c::readByte()");
}
return (uint8_t) x;
} }
/** /**
@@ -128,24 +133,36 @@ class I2c
* Read byte from an i2c register * Read byte from an i2c register
* *
* @param reg Register to read from * @param reg Register to read from
*
* @throws std::invalid_argument in case of error
* @return char read from register * @return char read from register
*/ */
uint8_t uint8_t
readReg(uint8_t reg) readReg(uint8_t reg)
{ {
return mraa_i2c_read_byte_data(m_i2c, reg); int x = mraa_i2c_read_byte_data(m_i2c, reg);
if (x == -1) {
throw std::invalid_argument("Unknown error in I2c::readReg()");
}
return (uint8_t) x;
} }
/** /**
* Read word from an i2c register * Read word from an i2c register
* *
* @param reg Register to read from * @param reg Register to read from
*
* @throws std::invalid_argument in case of error
* @return char read from register * @return char read from register
*/ */
uint16_t uint16_t
readWordReg(uint8_t reg) readWordReg(uint8_t reg)
{ {
return mraa_i2c_read_word_data(m_i2c, reg); int x = mraa_i2c_read_word_data(m_i2c, reg);
if (x == -1) {
throw std::invalid_argument("Unknown error in I2c::readReg()");
}
return (uint16_t) x;
} }
/** /**