void SPI::_SPI(const char* _spi_path, uint32_t _bps, GPIO::GPIO_pin_type _cs_pin){
// allocate memory
cs_pin = _cs_pin;
cs_enable_high = false;
fd = open(_spi_path, O_RDWR);
if (fd < 0) {
warn("cannot open: %s", _spi_path);
}
bps = _bps;
GPIO_mode(cs_pin, GPIO::GPIO_OUTPUT);
GPIO_write(cs_pin, (int)!cs_enable_high);
printf("[SPI] Opened %s with FD %d\n", _spi_path, fd);
}
static void *display_init(struct fuse_conn_info *conn) {
if (!GPIO_setup()) {
warn("GPIO_setup failed");
goto done;
}
spi = SPI_create(spi_device, spi_bps);
if (NULL == spi) {
warn("SPI_setup failed");
goto done_gpio;
}
GPIO_mode(panel_on_pin, GPIO_OUTPUT);
GPIO_mode(border_pin, GPIO_OUTPUT);
GPIO_mode(discharge_pin, GPIO_OUTPUT);
#if EPD_COG_VERSION == 1
GPIO_mode(pwm_pin, GPIO_PWM);
#endif
GPIO_mode(reset_pin, GPIO_OUTPUT);
GPIO_mode(busy_pin, GPIO_INPUT);
epd = EPD_create(panel->size,
panel_on_pin,
border_pin,
discharge_pin,
#if EPD_COG_VERSION == 1
pwm_pin,
#endif
reset_pin,
busy_pin,
spi);
if (NULL == epd) {
warn("EPD_setup failed");
goto done_spi;
}
return (void *)epd;
// release resources
//done_epd:
// EPD_destroy(epd);
done_spi:
SPI_destroy(spi);
done_gpio:
GPIO_teardown();
done:
return NULL;
}
// the main test program
int main(int argc, char *argv[]) {
int rc = 0;
EPD_size display_size = EPD_1_44;
const uint8_t *const *images = images_1_44;
int image_count = SIZE_OF_ARRAY(images_1_44);
if (argc < 2) {
usage(argv[0], "missing argument(s)");
} else if (argc > 3) {
usage(argv[0], "extraneous extra argument(s)");
}
if (0 == strcmp("1.44", argv[1]) || 0 == strcmp("1_44", argv[1])) {
display_size = EPD_1_44;
images = images_1_44;
image_count = SIZE_OF_ARRAY(images_1_44);
#if EPD_1_9_SUPPORT
} else if (0 == strcmp("1.9", argv[1]) || 0 == strcmp("1_9", argv[1])) {
display_size = EPD_1_9;
images = images_1_9;
image_count = SIZE_OF_ARRAY(images_1_9);
#endif
} else if (0 == strcmp("2.0", argv[1]) || 0 == strcmp("2_0", argv[1])) {
display_size = EPD_2_0;
images = images_2_0;
image_count = SIZE_OF_ARRAY(images_2_0);
#if EPD_2_6_SUPPORT
} else if (0 == strcmp("2.6", argv[1]) || 0 == strcmp("2_6", argv[1])) {
display_size = EPD_2_6;
images = images_2_6;
image_count = SIZE_OF_ARRAY(images_2_6);
#endif
} else if (0 == strcmp("2.7", argv[1]) || 0 == strcmp("2_7", argv[1])) {
display_size = EPD_2_7;
images = images_2_7;
image_count = SIZE_OF_ARRAY(images_2_7);
} else {
usage(argv[0], "unknown display size: %s", argv[1]);
}
if (argc > 2) {
int n = atoi(argv[2]);
if (n < 0) {
usage(argv[0], "image-count cannot be negative");
} else if (n > image_count) {
usage(argv[0], "image-count: %d, cannot be greater than: %d", n, image_count);
}
image_count = n;
}
if (!GPIO_setup()) {
rc = 1;
warn("GPIO_setup failed");
goto done;
}
SPI_type *spi = SPI_create(SPI_DEVICE, SPI_BPS);
if (NULL == spi) {
rc = 1;
warn("SPI_setup failed");
goto done_gpio;
}
GPIO_mode(panel_on_pin, GPIO_OUTPUT);
GPIO_mode(border_pin, GPIO_OUTPUT);
GPIO_mode(discharge_pin, GPIO_OUTPUT);
#if EPD_PWM_REQUIRED
GPIO_mode(pwm_pin, GPIO_PWM);
#endif
GPIO_mode(reset_pin, GPIO_OUTPUT);
GPIO_mode(busy_pin, GPIO_INPUT);
EPD_type *epd = EPD_create(display_size,
panel_on_pin,
border_pin,
discharge_pin,
#if EPD_PWM_REQUIRED
pwm_pin,
#endif
reset_pin,
busy_pin,
spi);
if (NULL == epd) {
rc = 1;
warn("EPD_setup failed");
goto done_spi;
}
// EPD display
printf("clear display\n");
EPD_begin(epd);
EPD_clear(epd);
EPD_end(epd);
if (image_count > 0) {
printf("images start\n");
for (int i = 0; i < image_count; ++i) {
printf("image = %d\n", i);
EPD_begin(epd);
#if EPD_IMAGE_TWO_ARG
if (0 == i) {
EPD_image_0(epd, images[i]);
} else {
EPD_image(epd, images[i - 1], images[i]);
}
#elif EPD_IMAGE_ONE_ARG
EPD_image(epd, images[i]);
#else
#error "unsupported EPD_image() function"
#endif
EPD_end(epd);
if (i < image_count - 1) {
sleep(5);
}
}
}
// release resources
//done_epd:
EPD_destroy(epd);
done_spi:
SPI_destroy(spi);
done_gpio:
GPIO_teardown();
done:
return rc;
}