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mraa.c: add a by-name lookup function also for UARTs

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Signed-off-by: Tapani Utriainen <tapani@technexion.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Tapani Utriainen
2017-05-16 20:14:04 +08:00
committed by Brendan Le Foll
parent 9479843cde
commit 5ef3f3ea29
3 changed files with 50 additions and 0 deletions
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8
api/mraa/common.h
View File

@@ -265,6 +265,14 @@ int mraa_spi_lookup(const char* spi_name);
*/
int mraa_pwm_lookup(const char* pwm_name);
/**
* Get UART index by name, board must be initialised.
*
* @param uart_name: Name of UART. Eg:UART1
* @return int of MRAA index for UART, or -1 if not found.
*/
int mraa_uart_lookup(const char* uart_name);
/**
* Get default i2c bus, board must be initialised.
*

21
api/mraa/common.hpp
View File

@@ -300,6 +300,27 @@ getPwmLookup(std::string pwm_name)
return index;
}
/**
* Get UART index by UART name, board must be initialised.
*
* @param pwm_name: Name of the UART. Eg: UART2
* @throws std::invalid_argument if name is not found
* @return MRAA index for the UART
*/
inline int
getUartLookup(std::string uart_name)
{
int index = mraa_uart_lookup(uart_name.c_str());
if (index < 0) {
std::ostringstream oss;
oss << "UART name " << uart_name << " is not valid";
throw std::invalid_argument(oss.str());
}
return index;
}
/**
* Sets the log level to use from 0-7 where 7 is very verbose. These are the
* syslog log levels, see syslog(3) for more information on the levels.

21
src/mraa.c
View File

@@ -903,6 +903,27 @@ mraa_pwm_lookup(const char* pwm_name)
return -1;
}
int
mraa_uart_lookup(const char* uart_name)
{
int i;
if (plat == NULL) {
return -1;
}
if (uart_name == NULL || strlen(uart_name) == 0) {
return -1;
}
for (i = 0; i < plat->uart_dev_count; i++) {
if (plat->uart_dev[i].name != NULL && strcmp(uart_name, plat->uart_dev[i].name) == 0) {
return plat->uart_dev[i].index;
}
}
return -1;
}
int
mraa_get_default_i2c_bus(uint8_t platform_offset)
{