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Code Issues Releases Activity

Added a bunch of sanity checking

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This commit is contained in:
fordsfords
2016-06-26 14:28:06 -05:00
parent 5ad81066b2
commit 093922567a
5 changed files with 95 additions and 70 deletions
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39
source/common.c
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@ -49,20 +49,6 @@ SOFTWARE.
int setup_error = 0;
int module_setup = 0;
// In the pins_t structure, the "base_method" field tells how
// the "gpio" field should be interpreted.
#define BASE_METHOD_AS_IS 1 /* use the gpio value directly */
#define BASE_METHOD_XIO 2 /* add the gpio value to the XIO base */
typedef struct pins_t {
const char *name;
const char *key;
int gpio; /* port number to use under /sys/class/gpio */
int base_method; /* modifier for port number; see BASE_METHOD_... */
int pwm_mux_mode;
int ain;
} pins_t;
// I have no idea if this table is correct, we shall see - Robert Wolterman
pins_t pins_info[] = {
{ "GND", "U13_1", 0, BASE_METHOD_AS_IS, -1, -1},
@ -158,11 +144,12 @@ pins_t pins_info[] = {
// http://stackoverflow.com/questions/612097/how-can-i-get-the-list-of-files-in-a-directory-using-c-or-c
#define GPIO_PATH "/sys/class/gpio"
#define EXPANDER "pcf8574a\n"
int num_get_xio_base = 0; /* for self-test purposes */
int get_xio_base(void)
{
char label_file[80];
char label_file[FILENAME_BUFFER_SIZE];
FILE *label_fp;
char base_file[80];
char base_file[FILENAME_BUFFER_SIZE];
FILE *base_fp;
char input_line[80];
// Makes use of static variable xio_base_address to maintain state between
@ -182,22 +169,20 @@ int get_xio_base(void)
if (strcmp(".",ent->d_name) == 0 || strcmp("..",ent->d_name) == 0) {
continue; /* skip "." and ".." entries */
}
//printf ("%s\n", ent->d_name);
sprintf(label_file, "%s/%s/label", GPIO_PATH, ent->d_name);
//printf("label_file='%s'\n", label_file);
snprintf(label_file, sizeof(label_file), "%s/%s/label", GPIO_PATH, ent->d_name); BUF2SMALL(label_file);
label_fp = fopen(label_file, "r");
if (label_fp != NULL) {
char *s = fgets(input_line, sizeof(input_line), label_fp);
ASSRT(s == input_line && strlen(input_line) < sizeof(input_line)-1);
char *s = fgets(input_line, sizeof(input_line), label_fp); BUF2SMALL(input_line); ASSRT(s);
fclose(label_fp);
if (strcmp(input_line, EXPANDER) == 0) {
/* Found the expander, get the contents of base */
sprintf(base_file, "%s/%s/base", GPIO_PATH, ent->d_name);
snprintf(base_file, sizeof(base_file), "%s/%s/base", GPIO_PATH, ent->d_name); BUF2SMALL(base_file);
base_fp = fopen(base_file, "r"); ASSRT(base_fp != NULL);
s = fgets(input_line, sizeof(input_line), base_fp);
ASSRT(s == input_line && strlen(input_line) < sizeof(input_line)-1);
fclose(base_fp);
xio_base_address = atoi(input_line); /* remember the result */
num_get_xio_base++; /* for self-test purposes */
}
} /* if label file is open */
} /* if isdir */
@ -411,15 +396,15 @@ int build_path(const char *partial_path, const char *prefix, char *full_path, si
int get_spi_bus_path_number(unsigned int spi)
{
char path[80];
char ocp_dir[30];
char path[FILENAME_BUFFER_SIZE];
char ocp_dir[FILENAME_BUFFER_SIZE];
build_path("/sys/devices", "ocp", ocp_dir, sizeof(ocp_dir));
build_path("/sys/devices", "ocp", ocp_dir, sizeof(ocp_dir)); BUF2SMALL(ocp_dir);
if (spi == 0) {
snprintf(path, sizeof(path), "%s/48030000.spi/spi_master/spi1", ocp_dir);
snprintf(path, sizeof(path), "%s/48030000.spi/spi_master/spi1", ocp_dir); BUF2SMALL(path);
} else {
snprintf(path, sizeof(path), "%s/481a0000.spi/spi_master/spi1", ocp_dir);
snprintf(path, sizeof(path), "%s/481a0000.spi/spi_master/spi1", ocp_dir); BUF2SMALL(path);
}
DIR* dir = opendir(path);