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invert GPIO output (due to active LOW)

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This commit is contained in:
Edward Emelianov 2023-07-05 13:29:16 +03:00
parent ad29c057ab
commit 8156be33f7
1 changed files with 2 additions and 2 deletions
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4
SSL_sockets_GPIO/gpio.c
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@ -69,7 +69,7 @@ int gpio_open_device(const char *path){
} }
/** /**
* @brief gpio_set_outputs - set output pins * @brief gpio_set_outputs - set output pins (ACTIVE_LOW!!! so we need to invert incoming data for proper work)
* @return rq.fd or -1 if failed * @return rq.fd or -1 if failed
*/ */
int gpio_setup_outputs(){ int gpio_setup_outputs(){
@ -102,7 +102,7 @@ static int gpio_setreset(int input, int set){
bzero(&values, sizeof(values)); bzero(&values, sizeof(values));
uint64_t val = (1<<idx) & GPIO_OUT_MASK; uint64_t val = (1<<idx) & GPIO_OUT_MASK;
values.mask = val; values.mask = val;
values.bits = set ? val : 0; values.bits = set ? 0 : val; // invert bit due to GPIO_V2_LINE_FLAG_ACTIVE_LOW
DBG("mask=%" PRIu64 ", val=%" PRIu64, values.mask, values.bits); DBG("mask=%" PRIu64 ", val=%" PRIu64, values.mask, values.bits);
if(-1 == ioctl(rq_out.fd, GPIO_V2_LINE_SET_VALUES_IOCTL, &values)){ if(-1 == ioctl(rq_out.fd, GPIO_V2_LINE_SET_VALUES_IOCTL, &values)){
LOGERR("Unable to change GPIO values (mask=%" PRIu64 ", val=%" PRIu64 ": %s", values.mask, values.bits, strerror(errno)); LOGERR("Unable to change GPIO values (mask=%" PRIu64 ", val=%" PRIu64 ": %s", values.mask, values.bits, strerror(errno));