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Code Issues Releases Activity

More updates to the library to add debug printing

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This commit is contained in:
Robert Wolterman
2017-01-26 05:55:30 +00:00
parent bd7f667041
commit 8221016c10
8 changed files with 67 additions and 40 deletions
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48
source/c_pwm.c
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@ -111,7 +111,7 @@ int initialize_pwm(void)
int gpio = 0;
if (DEBUG)
printf(" ** EXPORTING PWM0 **\n");
printf(" ** initialize_pwm **\n");
if ((fd = open("/sys/class/pwm/pwmchip0/export", O_WRONLY)) < 0)
{
return -1;
@ -119,7 +119,7 @@ int initialize_pwm(void)
len = snprintf(str_gpio, sizeof(str_gpio), "%d", gpio); BUF2SMALL(str_gpio);
ssize_t s = write(fd, str_gpio, len); ASSRT(s == len);
if (DEBUG)
printf(" ** IN initialize_pwm: s = %d, len = %d\n", s, len);
printf(" ** initialize_pwm: export pin: s = %d, len = %d\n", s, len);
close(fd);
pwm_initialized = 1;
@ -154,9 +154,9 @@ int pwm_set_frequency(const char *key, float freq) {
len = snprintf(buffer, sizeof(buffer), "%lu", period_ns); BUF2SMALL(buffer);
ssize_t s = write(pwm->period_fd, buffer, len); //ASSRT(s == len);
if (DEBUG) {
printf(" ** IN pwm_set_frequency: pwm_initialized = %d\n", pwm_initialized);
printf(" ** pwm_set_frequency: pwm_initialized = %d\n", pwm_initialized);
printf(" ** pwm_set_frequency: buffer: %s\n", buffer);
printf(" ** IN pwm_set_frequency: s = %d, len = %d\n", s, len);
printf(" ** pwm_set_frequency: s = %d, len = %d\n", s, len);
}
if (s != len) {
rtnval = -1;
@ -199,9 +199,9 @@ int pwm_set_polarity(const char *key, int polarity) {
}
ssize_t s = write(pwm->polarity_fd, buffer, len); //ASSRT(s == len);
if (DEBUG) {
printf(" ** IN pwm_set_polarity: pwm_initialized = %d\n", pwm_initialized);
printf(" ** pwm_set_poliarity: buffer: %s\n", buffer);
printf(" ** IN pwm_set_polarity: s = %d, len = %d\n", s, len);
printf(" ** pwm_set_polarity: pwm_initialized = %d\n", pwm_initialized);
printf(" ** pwm_set_polarity: buffer: %s\n", buffer);
printf(" ** pwm_set_polarity: s = %d, len = %d\n", s, len);
}
if (s != len) {
rtnval = -1;
@ -236,9 +236,9 @@ int pwm_set_duty_cycle(const char *key, float duty) {
len = snprintf(buffer, sizeof(buffer), "%lu", pwm->duty); BUF2SMALL(buffer);
ssize_t s = write(pwm->duty_fd, buffer, len); //ASSRT(s == len);
if (DEBUG) {
printf(" ** IN pwm_set_duty_cycle: pwm_initialized = %d\n", pwm_initialized);
printf(" ** pwm_set_duty_cycle: pwm_initialized = %d\n", pwm_initialized);
printf(" ** pwm_set_duty_cycle: buffer: %s\n", buffer);
printf(" ** IN pwm_set_duty_cycle: s = %d, len = %d\n", s, len);
printf(" ** pwm_set_duty_cycle: s = %d, len = %d\n", s, len);
}
if (s != len) {
rtnval = -1;
@ -261,7 +261,7 @@ int pwm_set_enable(const char *key, int enable)
if (enable != 0 && enable != 1) {
if (DEBUG)
printf(" ** INVALID ENABLE OPTION, NEEDS TO BE EITHER 0 OR 1! **\n");
printf(" ** pwm_set_enable: enable needs to be 0 or 1! **\n");
return rtnval;
}
@ -269,7 +269,7 @@ int pwm_set_enable(const char *key, int enable)
if (pwm == NULL) {
if (DEBUG)
printf(" ** SOMETHING BAD HAPPEND IN pwm_set_enable, WE'RE EXITING WITH -1 NOW! **\n");
printf(" ** pwm_set_enable: pwm struct is null **\n");
return rtnval;
}
@ -277,15 +277,15 @@ int pwm_set_enable(const char *key, int enable)
len = snprintf(buffer, sizeof(buffer), "%d", enable); BUF2SMALL(buffer);
ssize_t s = write(pwm->enable_fd, buffer, len); //ASSRT(s == len);
if (DEBUG) {
printf(" ** IN pwm_set_enable: pwm_initialized = %d\n", pwm_initialized);
printf(" ** pwm_set_enable: pwm_initialized = %d\n", pwm_initialized);
printf(" ** pwm_set_enable: buffer: %s\n", buffer);
printf(" ** IN pwm_set_enable: s = %d, len = %d\n", s, len);
printf(" ** pwm_set_enable: s = %d, len = %d\n", s, len);
}
if (s == len)
{
if (DEBUG)
printf(" ** SETTING pwm->enable to %d\n", enable);
printf(" ** pwm_set_enable: pwm->enable to %d\n", enable);
pwm->enable = enable;
rtnval = 0;
} else {
@ -306,16 +306,16 @@ int pwm_start(const char *key, float duty, float freq, int polarity)
struct pwm_exp *new_pwm, *pwm;
if (DEBUG)
printf(" ** IN pwm_start: pwm_initialized = %d\n", pwm_initialized);
printf(" ** pwm_start: pwm_initialized = %d\n", pwm_initialized);
if(!pwm_initialized) {
initialize_pwm();
} else {
if (DEBUG)
printf(" ** ALREADY INITIALIZED, CALLING CLEANUP TO START FRESH **");
printf(" ** pwm_start: pwm already initialized, cleaning up **");
pwm_cleanup();
}
if (DEBUG)
printf(" ** IN pwm_start: pwm_initialized = %d\n", pwm_initialized);
printf(" ** pwm_start: pwm_initialized = %d\n", pwm_initialized);
//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); BUF2SMALL(pwm_base_path);
@ -327,11 +327,11 @@ int pwm_start(const char *key, float duty, float freq, int polarity)
snprintf(polarity_path, sizeof(polarity_path), "%s/polarity", pwm_base_path); BUF2SMALL(polarity_path);
if (DEBUG) {
printf(" ** IN pwm_start: pwm_base_path: %s\n", pwm_base_path);
printf(" ** IN pwm_start: enable_path: %s\n", enable_path);
printf(" ** IN pwm_start: period_path: %s\n", period_path);
printf(" ** IN pwm_start: duty_path: %s\n", duty_path);
printf(" ** IN pwm_start: polarity_path: %s\n", polarity_path);
printf(" ** pwm_start: pwm_base_path: %s\n", pwm_base_path);
printf(" ** pwm_start: enable_path: %s\n", enable_path);
printf(" ** pwm_start: period_path: %s\n", period_path);
printf(" ** pwm_start: duty_path: %s\n", duty_path);
printf(" ** pwm_start: polarity_path: %s\n", polarity_path);
}
//add period and duty fd to pwm list
@ -365,7 +365,7 @@ int pwm_start(const char *key, float duty, float freq, int polarity)
}
if (DEBUG)
printf(" ** IN pwm_start: IF WE MAKE IT HERE, THE FILES WERE SUCCESSFULLY OPEN **\n");
printf(" ** pwm_start: sysfs files opened successfully **\n");
strncpy(new_pwm->key, key, KEYLEN); /* can leave string unterminated */
new_pwm->key[KEYLEN] = '\0'; /* terminate string */
new_pwm->period_fd = period_fd;
@ -433,7 +433,7 @@ int pwm_disable(const char *key)
if (strcmp(pwm->key, key) == 0)
{
if (DEBUG) {
printf(" ** IN pwm_disable: unexporting %s\n", key);
printf(" ** pwm_disable: unexporting %s\n", key);
}
//close the fd
close(pwm->enable_fd);