diff options
Diffstat (limited to 'cethcan')
-rw-r--r-- | cethcan/Makefile | 6 | ||||
-rw-r--r-- | cethcan/cethcan.h | 1 | ||||
-rw-r--r-- | cethcan/cethcan.json | 4 | ||||
-rw-r--r-- | cethcan/main.c | 7 | ||||
-rw-r--r-- | cethcan/ttydmx.c | 279 |
5 files changed, 292 insertions, 5 deletions
diff --git a/cethcan/Makefile b/cethcan/Makefile index bc8fab4..933dd77 100644 --- a/cethcan/Makefile +++ b/cethcan/Makefile @@ -2,11 +2,11 @@ love: cethcan .PHONY: love PKGS="libevent jansson" -L_CFLAGS=-g -O0 -Wall -Wextra -Wshadow -pedantic -Wno-unused-parameter -Wno-format -std=gnu99 `pkg-config --cflags $(PKGS)` $(CFLAGS) -L_LDFLAGS=-g `pkg-config --libs $(PKGS)` -lcrypto $(LDFLAGS) +L_CFLAGS=-g -O0 -pthread -Wall -Wextra -Wshadow -pedantic -Wno-unused-parameter -Wno-format -std=gnu11 `pkg-config --cflags $(PKGS)` $(CFLAGS) +L_LDFLAGS=-g -pthread `pkg-config --libs $(PKGS)` -lcrypto $(LDFLAGS) cethcan: main.o can.o ether.o light.o beanctr.o \ - http.o socketcan.o jsonrpc.o rpc.o espnet.o + http.o socketcan.o jsonrpc.o rpc.o espnet.o ttydmx.o gcc $(L_LDFLAGS) -o $@ $^ clean: diff --git a/cethcan/cethcan.h b/cethcan/cethcan.h index 5b42f54..4d215f0 100644 --- a/cethcan/cethcan.h +++ b/cethcan/cethcan.h @@ -103,6 +103,7 @@ extern int ether_init(json_t *config); extern int light_init_conf(json_t *config); extern int bean_init_conf(json_t *config); extern int espnet_init_conf(json_t *config); +extern int ttydmx_init_conf(json_t *config); extern void http_init(void); #endif /* _CETHCAN_H */ diff --git a/cethcan/cethcan.json b/cethcan/cethcan.json index 8998550..2357993 100644 --- a/cethcan/cethcan.json +++ b/cethcan/cethcan.json @@ -33,8 +33,8 @@ { "addr": 258, "name": "door.right", "values": [ "open", "closed" ] }, { "addr": 259, "name": "door.lock", "values": [ "open", "closed" ] } ], - "espnet": [ { - "interface": "eth0", + "ttydmx": [ { + "ttydev": "ttyS2", "devices": [ { "baseaddr": 2, "name": "dmx.lounge_buero_ecke" }, { "baseaddr": 7, "name": "dmx.lounge_midwest" }, diff --git a/cethcan/main.c b/cethcan/main.c index 2b9154e..8d38757 100644 --- a/cethcan/main.c +++ b/cethcan/main.c @@ -81,6 +81,13 @@ int main(int argc, char **argv) return 1; } + json_t *dmxcfg = json_object_get(config, "ttydmx"); + for (size_t i = 0; i < json_array_size(dmxcfg); i++) { + json_t *c = json_array_get(dmxcfg, i); + if (ttydmx_init_conf(c)) + return 1; + } + http_init(); json_decref(config); diff --git a/cethcan/ttydmx.c b/cethcan/ttydmx.c new file mode 100644 index 0000000..6165ed7 --- /dev/null +++ b/cethcan/ttydmx.c @@ -0,0 +1,279 @@ +#include "cethcan.h" + +#include <limits.h> +#include <sys/types.h> +#include <sys/ioctl.h> +#include <termio.h> +#include <linux/serial.h> +#include <pthread.h> +#include <stdatomic.h> + +struct ttydmx_device; + +struct ttydmx_data { + size_t len; + uint8_t data[]; +}; + +struct ttydmx_sink { + struct ttydmx_sink *next; + + struct can_user *u; + int fd; + char *ttydev; + size_t maxaddr; + + pthread_t pusher; + struct ttydmx_data * _Atomic nextdata; + + struct ttydmx_device *devs; +}; + +struct ttydmx_device { + struct ttydmx_device *next; + struct ttydmx_sink *sink; + + char *name; + unsigned baseaddr; + uint8_t r, g, b; +}; + +static struct ttydmx_sink *sinks = NULL, **psinks = &sinks; + +struct ttydmx_device *ttydmx_find(const char *name) +{ + for (struct ttydmx_sink *sink = sinks; sink; sink = sink->next) + for (struct ttydmx_device *d = sink->devs; d; d = d->next) + if (!strcmp(d->name, name)) + return d; + return NULL; +} + +int ttydmx_set(struct ttydmx_device *dev, unsigned r, unsigned g, unsigned b) +{ + struct ttydmx_sink *sink = dev->sink; + struct ttydmx_data *newdata, *prevdata; + struct ttydmx_device *walk; + bool bump = dev->r != r || dev->g != g || dev->b != b; + + dev->r = r; + dev->g = g; + dev->b = b; + + newdata = calloc(offsetof(struct ttydmx_data, data[sink->maxaddr]), 1); + newdata->len = sink->maxaddr; + for (walk = sink->devs; walk; walk = walk->next) { + newdata->data[walk->baseaddr + 0] = walk->r; + newdata->data[walk->baseaddr + 1] = walk->g; + newdata->data[walk->baseaddr + 2] = walk->b; + } + prevdata = atomic_exchange(&sink->nextdata, newdata); + if (prevdata) + free(prevdata); + + if (bump) + json_bump_longpoll(); + return 0; +} + +void ttydmx_get(struct ttydmx_device *dev, + unsigned *r, unsigned *g, unsigned *b) +{ + *r = dev->r; + *g = dev->g; + *b = dev->b; +} + +static void ttydmx_json_one(struct ttydmx_sink *sink, + struct ttydmx_device *dev, + json_t *json, enum json_subtype type) +{ + json_t *lobj = json_object(); + + json_object_set_new(lobj, "klass", json_string("dmxrgb")); + json_object_set_new(lobj, "dmxaddr", json_integer(dev->baseaddr)); + + json_object_set_new(lobj, "r", json_integer(dev->r)); + json_object_set_new(lobj, "g", json_integer(dev->g)); + json_object_set_new(lobj, "b", json_integer(dev->b)); + + json_object_set_new(json, dev->name, lobj); +} + +static void ttydmx_json_handler(void *arg, json_t *json, + enum json_subtype type) +{ + struct ttydmx_sink *sink = arg; + for (struct ttydmx_device *d = sink->devs; d; d = d->next) + ttydmx_json_one(sink, d, json, type); +} + +static void ttydmx_can_handler(void *arg, struct can_message *msg) +{ +} + +static struct ttydmx_device *ttydmx_add_dev(struct ttydmx_sink *sink, + json_t *config) +{ + struct ttydmx_device *d; + + if (!json_is_object(config)) { + lprintf("ttyDMX device config must be an object/dictionary"); + return NULL; + } + if (!json_is_string(json_object_get(config, "name"))) { + lprintf("ttyDMX device config must specify str 'name'"); + return NULL; + } + if (!json_is_integer(json_object_get(config, "baseaddr"))) { + lprintf("ttyDMX device config must specify int 'baseaddr'"); + return NULL; + } + + d = calloc(sizeof(*d), 1); + d->sink = sink; + d->baseaddr = json_integer_value(json_object_get(config, "baseaddr")); + d->name = strdup(json_string_value(json_object_get(config, "name"))); + + if (d->baseaddr + 4 > sink->maxaddr) + sink->maxaddr = d->baseaddr + 4; + return d; +} + +static void *ttydmx_thread(void *arg) +{ + struct ttydmx_sink *sink = arg; + struct ttydmx_data *data = NULL, *newdata; + uint8_t dummy = 0; + + while (1) { + newdata = atomic_exchange(&sink->nextdata, NULL); + if (newdata) { + free(data); + data = newdata; + } + + ioctl(sink->fd, TIOCSBRK, 0); + usleep(100); + ioctl(sink->fd, TIOCCBRK, 0); + usleep(12); + write(sink->fd, data ? data->data : &dummy, + data ? data->len : 1); + tcdrain(sink->fd); + } + return NULL; +} + +int ttydmx_init_conf(json_t *config) +{ + struct ttydmx_sink *sink; + struct ttydmx_device **devp; + const char *ttydev; + char ttydevfull[PATH_MAX]; + struct stat st; + struct termios termios; + struct serial_struct serial; + + if (!json_is_object(config)) { + lprintf("ttyDMX config must be an object/dictionary"); + return 1; + } + if (!json_is_string(json_object_get(config, "ttydev"))) { + lprintf("ttyDMX config must have a string 'ttydev' key"); + return 1; + } + if (!json_is_array(json_object_get(config, "devices"))) { + lprintf("ttyDMX config must have an array 'devices' key"); + return 1; + } + + ttydev = json_string_value(json_object_get(config, "ttydev")); + if (strchr(ttydev, '/')) + snprintf(ttydevfull, sizeof(ttydevfull), "%s", ttydev); + else + snprintf(ttydevfull, sizeof(ttydevfull), "/dev/%s", ttydev); + + if (stat(ttydevfull, &st)) { + lprintf("ttyDMX: stat(\"%s\") failed: %s", + ttydevfull, strerror(errno)); + return 1; + } + if (!S_ISCHR(st.st_mode)) { + lprintf("ttyDMX: \"%s\" needs to be a character device!", + ttydevfull); + return 1; + } + + sink = calloc(sizeof(*sink), 1); + sink->ttydev = strdup(ttydevfull); + sink->fd = open(ttydevfull, O_RDWR | O_NOCTTY); + if (sink->fd < 0) { + lprintf("ttyDMX: failed to open \"%s\": %s", + ttydevfull, strerror(errno)); + free(sink->ttydev); + free(sink); + return 1; + } + + memset(&serial, 0, sizeof(serial)); + if (ioctl(sink->fd, TIOCGSERIAL, &serial)) + goto out_setup_err; + + serial.flags &= ~ASYNC_SPD_MASK; + serial.flags |= ASYNC_SPD_CUST; + serial.custom_divisor = serial.baud_base / 250000; + + if (ioctl(sink->fd, TIOCSSERIAL, &serial)) + goto out_setup_err; + if (ioctl(sink->fd, TIOCGSERIAL, &serial)) + goto out_setup_err; + lprintf("ttyDMX: \"%s\": divisor: %d, result rate: %d\n", + ttydevfull, + (int)serial.custom_divisor, + (int)serial.baud_base / serial.custom_divisor); + + if (tcgetattr(sink->fd, &termios)) + goto out_setup_err; + cfsetispeed(&termios, B38400); + cfsetospeed(&termios, B38400); + cfmakeraw(&termios); + termios.c_cflag |= CLOCAL | CREAD | CSTOPB; + termios.c_cflag &= ~CRTSCTS; + if (tcsetattr(sink->fd, TCSANOW, &termios)) + goto out_setup_err; + + json_t *devcfg = json_object_get(config, "devices"); + devp = &sink->devs; + for (size_t i = 0; i < json_array_size(devcfg); i++) { + struct ttydmx_device *dev; + json_t *c = json_array_get(devcfg, i); + dev = ttydmx_add_dev(sink, c); + if (!dev) { + close(sink->fd); + free(sink->ttydev); + free(sink); + return 1; + } + *devp = dev; + devp = &dev->next; + } + + sink->u = can_register_alloc(sink, ttydmx_can_handler, + "ttyDMX[%s]", sink->ttydev); + sink->u->json = ttydmx_json_handler; + + if (pthread_create(&sink->pusher, NULL, ttydmx_thread, sink)) + lprintf("ttyDMX[%s]: failed to start thread!", sink->ttydev); + + *psinks = sink; + psinks = &sink->next; + return 0; + +out_setup_err: + lprintf("ttyDMX: setup error on \"%s\": %s", + ttydevfull, strerror(errno)); + close(sink->fd); + free(sink->ttydev); + free(sink); + return 1; +} |