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uart_ow: Better error handling in corner cases

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Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Brendan Le Foll
2016-04-15 12:03:32 +01:00
parent 4a52ad6c4f
commit c41c3b41d5
4 changed files with 72 additions and 44 deletions
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12
api/mraa/uart_ow.h
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@@ -117,18 +117,18 @@ mraa_result_t mraa_uart_ow_stop(mraa_uart_ow_context dev);
* Read a byte from the 1-wire bus
*
* @param dev uart_ow context
* @return the byte read
* @return the byte read or -1 for error
*/
uint8_t mraa_uart_ow_read_byte(mraa_uart_ow_context dev);
int mraa_uart_ow_read_byte(mraa_uart_ow_context dev);
/**
* Write a byte to a 1-wire bus
*
* @param dev uart_ow context
* @param byte the byte to write to the bus
* @return the byte read back during the time slot
* @return the byte read back during the time slot or -1 for error
*/
uint8_t mraa_uart_ow_write_byte(mraa_uart_ow_context dev, uint8_t byte);
int mraa_uart_ow_write_byte(mraa_uart_ow_context dev, uint8_t byte);
/**
* Write a bit to a 1-wire bus and read a bit corresponding to the
@@ -137,9 +137,9 @@ uint8_t mraa_uart_ow_write_byte(mraa_uart_ow_context dev, uint8_t byte);
*
* @param dev uart_ow context
* @param bit the bit to write to the bus
* @return the bit read back during the time slot
* @return the bit read back during the time slot or -1 for error
*/
uint8_t mraa_uart_ow_bit(mraa_uart_ow_context dev, uint8_t bit);
int mraa_uart_ow_bit(mraa_uart_ow_context dev, uint8_t bit);
/**
* Send a reset pulse to the 1-wire bus and test for device presence