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uart: add function mraa_uart_get_dev_path

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Used for getting the path to the character device under linux for uart
device. i.e. "/dev/ttyS0"

Adds paths to existing platforms.
Closes #84

Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
This commit is contained in:
Thomas Ingleby
2015-01-20 15:10:47 +00:00
parent ed4c68eba1
commit 9cfbc87924
11 changed files with 83 additions and 0 deletions
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13
src/arm/raspberry_pi_b.c
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@@ -28,6 +28,8 @@
#include "common.h"
#include "arm/raspberry_pi_b.h"
#define UART_DEV_PATH "/dev/ttyAMA0"
mraa_board_t*
mraa_raspberry_pi_b()
{
@@ -178,6 +180,17 @@ mraa_raspberry_pi_b()
b->def_uart_dev = 0;
b->uart_dev[0].rx = 10;
b->uart_dev[0].tx = 8;
int uart_path_length = strlen(UART_DEV_PATH) + 1;
b->uart_dev[0].device_path = (char*) malloc(sizeof(char) * uart_path_length);
if (b->uart_dev[0].device_path == NULL) {
goto error;
}
strncpy(b->uart_dev[0].device_path, UART_DEV_PATH, uart_path_length);
return b;
error:
syslog(LOG_CRIT, "raspberry pi: board failed to initialise");
free(b);
return NULL;
}