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Adds runtime err if softpwm fails for Issue #16
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@ -241,8 +241,12 @@ int softpwm_start(const char *key, float duty, float freq, int polarity)
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if (get_gpio_number(key, &gpio) < 0)
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return -1;
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if (gpio_export(gpio) < 0)
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return -1;
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if (gpio_export(gpio) < 0) {
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char err[2000];
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snprintf(err, sizeof(err), "Error setting up softpwm on pin %d, maybe already exported? (%s)", gpio, get_error_msg());
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add_error_msg(err);
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return -1;
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}
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if (gpio_set_direction(gpio, OUTPUT) < 0)
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return -1;
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