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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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46
source/c_pwm.c
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@ -79,7 +79,7 @@ int initialize_pwm(void)
{
if (!pwm_initialized) {
int fd, len;
char str_gpio[2];
char str_gpio[80];
// Per https://github.com/NextThingCo/CHIP-linux/pull/4
// we need to export 0 here to enable pwm0
int gpio = 0;
@ -88,7 +88,7 @@ int initialize_pwm(void)
{
return -1;
}
len = snprintf(str_gpio, sizeof(str_gpio), "%d", gpio);
len = snprintf(str_gpio, sizeof(str_gpio), "%d", gpio); BUF2SMALL(str_gpio);
ssize_t s = write(fd, str_gpio, len); ASSRT(s == len);
close(fd);
@ -101,7 +101,7 @@ int initialize_pwm(void)
int pwm_set_frequency(const char *key, float freq) {
int len;
char buffer[20];
char buffer[80];
unsigned long period_ns;
struct pwm_exp *pwm;
@ -119,7 +119,7 @@ int pwm_set_frequency(const char *key, float freq) {
if (period_ns != pwm->period_ns) {
pwm->period_ns = period_ns;
len = snprintf(buffer, sizeof(buffer), "%lu", period_ns);
len = snprintf(buffer, sizeof(buffer), "%lu", period_ns); BUF2SMALL(buffer);
ssize_t s = write(pwm->period_fd, buffer, len); ASSRT(s == len);
}
@ -128,7 +128,7 @@ int pwm_set_frequency(const char *key, float freq) {
int pwm_set_polarity(const char *key, int polarity) {
int len;
char buffer[9]; /* allow room for trailing NUL byte */
char buffer[80];
struct pwm_exp *pwm;
pwm = lookup_exported_pwm(key);
@ -142,11 +142,11 @@ int pwm_set_polarity(const char *key, int polarity) {
}
if (polarity == 0) {
len = snprintf(buffer, sizeof(buffer), "%s", "normal");
len = snprintf(buffer, sizeof(buffer), "%s", "normal"); BUF2SMALL(buffer);
}
else
{
len = snprintf(buffer, sizeof(buffer), "%s", "inverted");
len = snprintf(buffer, sizeof(buffer), "%s", "inverted"); BUF2SMALL(buffer);
}
ssize_t s = write(pwm->polarity_fd, buffer, len); ASSRT(s == len);
@ -155,7 +155,7 @@ int pwm_set_polarity(const char *key, int polarity) {
int pwm_set_duty_cycle(const char *key, float duty) {
int len;
char buffer[20];
char buffer[80];
struct pwm_exp *pwm;
if (duty < 0.0 || duty > 100.0)
@ -169,7 +169,7 @@ int pwm_set_duty_cycle(const char *key, float duty) {
pwm->duty = (unsigned long)(pwm->period_ns * (duty / 100.0));
len = snprintf(buffer, sizeof(buffer), "%lu", pwm->duty);
len = snprintf(buffer, sizeof(buffer), "%lu", pwm->duty); BUF2SMALL(buffer);
ssize_t s = write(pwm->duty_fd, buffer, len); ASSRT(s == len);
return 0;
@ -178,7 +178,7 @@ int pwm_set_duty_cycle(const char *key, float duty) {
int pwm_set_enable(const char *key, int enable)
{
int len;
char buffer[20];
char buffer[80];
struct pwm_exp *pwm;
if (enable != 0 || enable != 1)
@ -192,7 +192,7 @@ int pwm_set_enable(const char *key, int enable)
pwm->enable = enable;
len = snprintf(buffer, sizeof(buffer), "%d", pwm->enable);
len = snprintf(buffer, sizeof(buffer), "%d", pwm->enable); BUF2SMALL(buffer);
ssize_t s = write(pwm->enable_fd, buffer, len); ASSRT(s == len);
return 0;
@ -200,11 +200,11 @@ int pwm_set_enable(const char *key, int enable)
int pwm_start(const char *key, float duty, float freq, int polarity)
{
char pwm_base_path[45];
char period_path[50];
char duty_path[50];
char enable_path[50];
char polarity_path[55];
char pwm_base_path[80];
char period_path[80];
char duty_path[80];
char enable_path[80];
char polarity_path[80];
int period_fd, duty_fd, polarity_fd, enable_fd;
struct pwm_exp *new_pwm, *pwm;
@ -213,13 +213,13 @@ int pwm_start(const char *key, float duty, float freq, int polarity)
}
//setup the pwm base path, the chip only has one pwm
snprintf(pwm_base_path, sizeof(pwm_base_path), "/sys/class/pwm/pwmchip0/pwm%d", 0);
snprintf(pwm_base_path, sizeof(pwm_base_path), "/sys/class/pwm/pwmchip0/pwm%d", 0); BUF2SMALL(pwm_base_path);
//create the path for the period and duty
snprintf(enable_path, sizeof(enable_path), "%s/enable", pwm_base_path);
snprintf(period_path, sizeof(period_path), "%s/period", pwm_base_path);
snprintf(duty_path, sizeof(duty_path), "%s/duty_cycle", pwm_base_path);
snprintf(polarity_path, sizeof(polarity_path), "%s/polarity", pwm_base_path);
snprintf(enable_path, sizeof(enable_path), "%s/enable", pwm_base_path); BUF2SMALL(enable_path);
snprintf(period_path, sizeof(period_path), "%s/period", pwm_base_path); BUF2SMALL(period_path);
snprintf(duty_path, sizeof(duty_path), "%s/duty_cycle", pwm_base_path); BUF2SMALL(duty_path);
snprintf(polarity_path, sizeof(polarity_path), "%s/polarity", pwm_base_path); BUF2SMALL(polarity_path);
//add period and duty fd to pwm list
if ((enable_fd = open(enable_path, O_RDWR)) < 0)
@ -285,7 +285,7 @@ int pwm_disable(const char *key)
struct pwm_exp *pwm, *temp, *prev_pwm = NULL;
int fd, len;
char str_gpio[2];
char str_gpio[80];
// Per https://github.com/NextThingCo/CHIP-linux/pull/4
// we need to export 0 here to enable pwm0
int gpio = 0;
@ -300,7 +300,7 @@ int pwm_disable(const char *key)
{
return -1;
}
len = snprintf(str_gpio, sizeof(str_gpio), "%d", gpio);
len = snprintf(str_gpio, sizeof(str_gpio), "%d", gpio); BUF2SMALL(str_gpio);
ssize_t s = write(fd, str_gpio, len); ASSRT(s == len);
close(fd);