ESP32 Forum

I know the theoretical throughput

At 1MBit you should be able to push out a little less than 8000 frames per second.

Did you really see 20 - 50 ms between frames, or are these µs?

Still a lot, considering a fast frame is only a bit more than 100µs...


Cheers
Hans

void task_CAN_TX(void* pvParameters) {
	
	CAN_frame_t __TX_frame;
	uint32_t counter = 0;
		
		__TX_frame.MsgID = 0x264;
		__TX_frame.DLC   =  8;
		__TX_frame.data.u8[0] = 'E'; 
		__TX_frame.data.u8[1] = 'S';
		__TX_frame.data.u8[2] = 'P';
		__TX_frame.data.u8[3] = '-'; 		
		__TX_frame.data.u8[4] = 'C'; 		
		__TX_frame.data.u8[5] = 'A'; 		
		__TX_frame.data.u8[6] = 'N'; 	
		__TX_frame.data.u8[7] = counter;
			
while(1) {
		__TX_frame.data.u8[7] = counter; 
		CAN_write_frame(&__TX_frame);
		vTaskDelay( 50 / portTICK_PERIOD_MS);  // to see ( printf on receiver side ) what happend..
		counter++;
		if (counter >= 256) counter = 0; 
  }
}

Rudi: That would be the choice of the author of that driver. If he wants, he can file a pull request in the esp-idf github and we'll check the code quality and such and if that's OK, we will integrate it into esp-idf. If he prefers to have the driver as a separate component, that is fine too.

I get an error like this:
...
/ESP32-CAN/main///main.c:102:1: fatal error: opening dependency file //main.d: Permission denied
...

Is there further configuration of the source file needed?

$ make -j5 all
Building partitions from /c/idf/2114/components/partition_table/partitions_singleapp.csv...
CC bt.o
CC esp_ota_ops.o
CC src/bootloader_random.o
CC libcoap/src/address.o
AR libbt.a
CC src/flash_encrypt.o
CC libcoap/src/async.o
CXX cxx_guards.o
AR libapp_update.a
CC src/esp_image_format.o
CC rtc_module.o
CC src/flash_partitions.o
CC libcoap/src/block.o
CC src/secure_boot_signatures.o
CC i2c.o
CC libcoap/src/coap_time.o
CC src/secure_boot.o
CC src/efuse.o
CC libcoap/src/debug.o
CC src/bootloader_flash.o
CC sdmmc_host.o
AR libbootloader_support.a
CC libcoap/src/encode.o
AR libcxx.a
CC src/bootloader_random.o
CC timer.o
CC int_wdt.o
CC libcoap/src/hashkey.o
CC libcoap/src/mem.o
CC brownout.o
CC emac_main.o
CC src/flash_encrypt.o
CC sdmmc_transaction.o
CC system_api.o
CC libcoap/src/net.o
CC src/esp_image_format.o
CC rmt.o
CC hw_random.o
CC emac_dev.o
CC src/flash_partitions.o
CC cpu_freq.o
CC src/secure_boot_signatures.o
AR libethernet.a
CC pcnt.o
CC libcoap/src/option.o
CC event_loop.o
CC src/secure_boot.o
CC core_dump.o
CC libcoap/src/pdu.o
CC src/efuse.o
CC gpio.o
CC library/xmltok_impl.o
CC src/bootloader_flash.o
CC intr_alloc.o
CC libcoap/src/resource.o
CC library/xmlrole.o
AR libbootloader_support.a
CC ledc.o
CC ipc.o
CC libcoap/src/str.o
CC library/xmlparse.o
CC log.o
CC freertos_hooks.o
CC libcoap/src/subscribe.o
CC periph_ctrl.o
CC heap_alloc_caps.o
AR liblog.a
CC libcoap/src/uri.o
CC i2s.o
CC deep_sleep.o
CC port/coap_io_socket.o
CC uart.o
CC phy_init.o
CC library/xmltok.o
CC spi_flash_rom_patch.o
CC crosscore_int.o
AR libcoap.a
AR libspi_flash.a
CC sigmadelta.o
CC cpu_util.o
CC spi_master.o
CC gdbstub.o
CC micro-ecc/uECC.o
CC lib_printf.o
CC cpu_start.o
CC src/option/unicode.o
AR libdriver.a
CC library/xmltok_ns.o
AR libmicro-ecc.a
CC src/option/syscall.o
CC task_wdt.o
CC port/chardata.o
CC xtensa_overlay_os_hook.o
CC flash_qio_mode.o
CC src/diskio.o
CC event_default_handlers.o
CC FreeRTOS-openocd.o
CC port/expat_element.o
CC bootloader_start.o
CC src/vfs_fat.o
CC timers.o
CC port/minicheck.o
CC panic.o
CC tasks.o
AR libmain.a
CC src/vfs_fat_sdmmc.o
AR libexpat.a
CC hwcrypto/aes.o
CC hwcrypto/sha.o
CC src//jsmn.o
CC src/ff.o
LD bootloader.elf
CC event_groups.o
AR libjsmn.a
AR libesp32.a
CC heap_regions.o
CC log.o
AR libfatfs.a
CC library/cJSON.o
AR liblog.a
CC port.o
esptool.py v2.0-beta2
CC xtensa_init.o
CC mdns.o
CC port/cJSON_Utils.o
CC list.o
CC apps/dhcpserver.o
CC croutine.o
AR libjson.a
CC queue.o
CC micro-ecc/uECC.o
CC library/havege.o
CC xtensa_intr.o
CC heap_regions_debug.o
AR libmicro-ecc.a
AR libmdns.a
CC library/ssl_cookie.o
CC core/tcp_out.o
CC ringbuf.o
CC locks.o
CC syscall_table.o
CC core/udp.o
AS portasm.o
CC library/md5.o
AS xtensa_vectors.o
CC syscalls.o
CC core/def.o
CC library/nghttp2_map.o
CC library/certs.o
CC reent_init.o
AS xtensa_context.o
CC core/timers.o
CC time.o
CC library/ssl_ciphersuites.o
CC library/nghttp2_submit.o
AS xtensa_intr_asm.o
AR libfreertos.a
CC library/camellia.o
AR libnewlib.a
CC core/stats.o
CXX src/nvs_api.o
CC core/netif.o
CC library/x509_crl.o
CC library/nghttp2_queue.o
CC library/ssl_stack.o
CC core/pbuf.o
CC library/nghttp2_pq.o
CC library/threading.o
CC library/aesni.o
CC library/nghttp2_hd_huffman_data.o
CC library/ssl_lib.o
CC library/bignum.o
CC core/tcp_in.o
CC library/nghttp2_outbound_item.o
CC library/ssl_x509.o
CC library/arc4.o
CC library/nghttp2_frame.o
CC core/raw.o
CC library/ssl_pkey.o
CC library/cipher_wrap.o
CC core/ip.o
CC library/ssl_methods.o
CC library/nghttp2_helper.o
CXX src/nvs_storage.o
CC library/aes.o
CC core/dns.o
CC library/ssl_cert.o
CC library/nghttp2_npn.o
CC library/xtea.o
CC platform/ssl_port.o
CC library/nghttp2_option.o
CC core/tcp.o
CC library/base64.o
CC platform/ssl_pm.o
CC library/nghttp2_buf.o
CC core/sys.o
CC library/sha512.o
CC library/pkcs11.o
CC library/nghttp2_priority_spec.o
CC core/memp.o
AR libopenssl.a
CC library/asn1write.o
CC library/nghttp2_hd.o
CXX src/nvs_pagemanager.o
CC sdmmc_cmd.o
CC core/init.o
CC library/oid.o
AR libsdmmc.a
CC core/inet_chksum.o
CC library/ecjpake.o
CC library/nghttp2_stream.o
CC core/mem.o
CC library/ssl_tls.o
CXX src/nvs_item_hash_list.o
CC library/nghttp2_session.o
CC api/lwip_debug.o
CC api/sockets.o
CXX src/nvs_page.o
CC flash_ops.o
CC library/debug.o
CC library/net.o
CC library/ecdh.o
CC api/api_msg.o
CXX src/nvs_types.o
CC library/nghttp2_callbacks.o
CC cache_utils.o
CC library/x509_crt.o
CC library/nghttp2_rcbuf.o
CC api/err.o
CC spi_flash_rom_patch.o
CC library/nghttp2_hd_huffman.o
AR libnvs_flash.a
CC api/netbuf.o
CC library/ssl_srv.o
CC partition.o
CC tcpip_adapter_lwip.o
CC library/nghttp2_mem.o
CC api/tcpip.o
CC library/nghttp2_version.o
CC flash_mmap.o
CC api/netifapi.o
AR libtcpip_adapter.a
CC library/ecdsa.o
CC library/nghttp2_http.o
CC api/api_lib.o
AR libspi_flash.a
CC library/md2.o
CC port/http_parser.o
CC ulp.o
CC vfs.o
CC library/x509_create.o
CC api/netdb.o
CC vfs_uart.o
AR libulp.a
CC library/memory_buffer_alloc.o
AR libvfs.a
CC api/pppapi.o
CC library/gcm.o
CC apps/sntp/sntp.o
AR libnghttp.a
CC trax.o
CC library/version.o
CC src/crypto/ms_funcs.o
CC eri.o
CC apps/ping/esp_ping.o
CC library/pem.o
AR libxtensa-debug-module.a
CC apps/ping/ping.o
CC src/crypto/crypto_internal-cipher.o
CC library/padlock.o
CC core/ipv4/icmp.o
CC library/asn1parse.o
CC src/crypto/crypto_internal-modexp.o
CC core/ipv4/autoip.o
CC library/timing.o
CC src/crypto/bignum.o
CC core/ipv4/ip4.o
CC library/ssl_cli.o
CC library/pkwrite.o
CC core/ipv4/igmp.o
CC src/crypto/sha1-pbkdf2.o
CC core/ipv4/ip4_addr.o
CC library/ssl_cache.o
CC src/crypto/aes-cbc.o
CC core/ipv4/dhcp.o
CC library/sha256.o
CC src/crypto/md5.o
CC library/md_wrap.o
CC core/ipv4/ip_frag.o
CC src/crypto/rc4.o
CC core/ipv6/icmp6.o
CC library/entropy.o
CC src/crypto/sha256.o
CC core/ipv6/ethip6.o
CC core/ipv6/mld6.o
CC library/md.o
CC src/crypto/dh_groups.o
CC core/ipv6/nd6.o
CC core/ipv6/ip6.o
CC library/rsa.o
CC src/crypto/md4-internal.o
CC core/ipv6/ip6_addr.o
CC src/crypto/sha1-internal.o
CC library/ripemd160.o
CC core/ipv6/inet6.o
CC core/ipv6/dhcp6.o
CC core/ipv6/ip6_frag.o
CC src/crypto/aes-wrap.o
CC netif/ethernetif.o
CC library/version_features.o
CC src/crypto/crypto_internal.o
CC netif/lowpan6.o
CC netif/ethernet.o
CC library/cipher.o
CC netif/etharp.o
CC src/crypto/dh_group5.o
CC netif/slipif.o
CC port/freertos/sys_arch.o
CC src/crypto/des-internal.o
CC library/entropy_poll.o
CC port/netif/ethernetif.o
CC src/crypto/crypto_internal-rsa.o
CC port/netif/wlanif.o
CC library/dhm.o
CC src/crypto/aes-unwrap.o
AR liblwip.a
CC library/error.o
CC src/crypto/aes-internal-dec.o
CC src/crypto/sha1.o
CC src/crypto/aes-internal.o
CC library/ssl_ticket.o
CC library/x509.o
CC src/crypto/md5-internal.o
CC src/crypto/sha256-internal.o
CC library/blowfish.o
CC library/ecp.o
CC src/crypto/aes-internal-enc.o
CC library/md4.o
CC port/os_xtensa.o
CC library/x509_csr.o
CC library/pkparse.o
AR libwpa_supplicant.a
CC library/pkcs5.o
CC library/ccm.o
CC library/pkcs12.o
CC library/pk_wrap.o
CC library/ecp_curves.o
CC library/x509write_crt.o
CC library/ctr_drbg.o
CC library/platform.o
CC library/pk.o
CC library/x509write_csr.o
CC library/des.o
CC library/hmac_drbg.o
CC library/sha1.o
CC port/esp_sha512.o
CC port/esp_hardware.o
CC port/esp_bignum.o
CC port/esp_sha256.o
CC port/net.o
CC port/esp_sha1.o
CC port/mbedtls_debug.o
AR libmbedtls.a
CC //main.o
CC drv/CAN/CAN.o
CC drv/CAN/cfg/CAN_config.o
AR libmain.a
LD CAN_demo.elf
esptool.py v2.0-beta2
To flash all build output, run 'make flash' or:
python /c/idf/2114/components/esptool_py/esptool/esptool.py --chip esp32 --port com21 --baud 921600 --before default_reset --after hard_reset write_flash -u --flash_mode dio --flash_freq 40m --flash_size detect 0x1000 /home/sysop/testcan/build/bootloader/bootloader.bin 0x10000 /home/sysop/testcan/build/CAN_demo.bin 0x8000 /home/sysop/testcan/build/partitions_singleapp.bin

Rudi: That would be the choice of the author of that driver. If he wants, he can file a pull request in the esp-idf github and we'll check the code quality and such and if that's OK, we will integrate it into esp-idf. If he prefers to have the driver as a separate component, that is fine too.

Nice.
Dont't forget about those pesky RTR frames