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circuitpython/extmod/extmod.cmake
Damien George 1b578fe2c0 extmod/machine_i2c_target: Add new machine.I2CTarget class. 
This commit implements a generic I2C target/peripheral/"slave" device,
called `machine.I2CTarget`.  It can work in two separate modes:

- A general device with interrupts/events/callbacks for low-level I2C
  operations like address match, read request and stop.

- A memory device that allows reading/writing a specific region of memory
  (or "registers") on the target I2C device.

To make a memory device is very simple:

    from machine import I2CTarget

    mem = bytearray(8)
    i2c = I2CTarget(addr=67, mem=mem)

That's all that's needed to start the I2C target.  From then on it will
respond to any I2C controller on the bus, allowing reads and writes to the
mem bytearray.

It's also possible to register to receive events.  For example to be
notified when the memory is read/written:

    from machine import I2CTarget

    def irq_handler(i2c_target):
        flags = i2c_target.irq().flags()
        if flags & I2CTarget.IRQ_END_READ:
            print("controller read target at addr", i2c_target.memaddr)
        if flags & I2CTarget.IRQ_END_WRITE:
            print("controller wrote target at addr", i2c_target.memaddr)

    mem = bytearray(8)
    i2c = I2CTarget(addr=67, mem=mem)
    i2c.irq(irq_handler)

Instead of a memory device, an arbitrary I2C device can be implemented
using all the events (see docs).

This is based on the discussion in #3935.

Signed-off-by: Damien George <damien@micropython.org>
2025-08-01 23:03:17 +10:00

350 lines
14 KiB
CMake
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# CMake fragment for MicroPython extmod component
set(MICROPY_EXTMOD_DIR "${MICROPY_DIR}/extmod")
set(MICROPY_OOFATFS_DIR "${MICROPY_DIR}/lib/oofatfs")
set(MICROPY_SOURCE_EXTMOD
${MICROPY_DIR}/shared/libc/abort_.c
${MICROPY_DIR}/shared/libc/printf.c
${MICROPY_EXTMOD_DIR}/btstack/modbluetooth_btstack.c
${MICROPY_EXTMOD_DIR}/machine_adc.c
${MICROPY_EXTMOD_DIR}/machine_adc_block.c
${MICROPY_EXTMOD_DIR}/machine_bitstream.c
${MICROPY_EXTMOD_DIR}/machine_i2c.c
${MICROPY_EXTMOD_DIR}/machine_i2c_target.c
${MICROPY_EXTMOD_DIR}/machine_i2s.c
${MICROPY_EXTMOD_DIR}/machine_mem.c
${MICROPY_EXTMOD_DIR}/machine_pulse.c
${MICROPY_EXTMOD_DIR}/machine_pwm.c
${MICROPY_EXTMOD_DIR}/machine_signal.c
${MICROPY_EXTMOD_DIR}/machine_spi.c
${MICROPY_EXTMOD_DIR}/machine_uart.c
${MICROPY_EXTMOD_DIR}/machine_usb_device.c
${MICROPY_EXTMOD_DIR}/machine_wdt.c
${MICROPY_EXTMOD_DIR}/modbluetooth.c
${MICROPY_EXTMOD_DIR}/modframebuf.c
${MICROPY_EXTMOD_DIR}/modlwip.c
${MICROPY_EXTMOD_DIR}/modmachine.c
${MICROPY_EXTMOD_DIR}/modmarshal.c
${MICROPY_EXTMOD_DIR}/modnetwork.c
${MICROPY_EXTMOD_DIR}/modonewire.c
${MICROPY_EXTMOD_DIR}/modasyncio.c
${MICROPY_EXTMOD_DIR}/modbinascii.c
${MICROPY_EXTMOD_DIR}/modcryptolib.c
${MICROPY_EXTMOD_DIR}/moductypes.c
${MICROPY_EXTMOD_DIR}/moddeflate.c
${MICROPY_EXTMOD_DIR}/modhashlib.c
${MICROPY_EXTMOD_DIR}/modheapq.c
${MICROPY_EXTMOD_DIR}/modjson.c
${MICROPY_EXTMOD_DIR}/modos.c
${MICROPY_EXTMOD_DIR}/modplatform.c
${MICROPY_EXTMOD_DIR}/modrandom.c
${MICROPY_EXTMOD_DIR}/modre.c
${MICROPY_EXTMOD_DIR}/modselect.c
${MICROPY_EXTMOD_DIR}/modsocket.c
${MICROPY_EXTMOD_DIR}/modtls_axtls.c
${MICROPY_EXTMOD_DIR}/modtls_mbedtls.c
${MICROPY_EXTMOD_DIR}/modtime.c
${MICROPY_EXTMOD_DIR}/modvfs.c
${MICROPY_EXTMOD_DIR}/modwebsocket.c
${MICROPY_EXTMOD_DIR}/modwebrepl.c
${MICROPY_EXTMOD_DIR}/network_cyw43.c
${MICROPY_EXTMOD_DIR}/network_lwip.c
${MICROPY_EXTMOD_DIR}/network_ninaw10.c
${MICROPY_EXTMOD_DIR}/network_ppp_lwip.c
${MICROPY_EXTMOD_DIR}/network_wiznet5k.c
${MICROPY_EXTMOD_DIR}/os_dupterm.c
${MICROPY_EXTMOD_DIR}/vfs.c
${MICROPY_EXTMOD_DIR}/vfs_blockdev.c
${MICROPY_EXTMOD_DIR}/vfs_fat.c
${MICROPY_EXTMOD_DIR}/vfs_fat_diskio.c
${MICROPY_EXTMOD_DIR}/vfs_fat_file.c
${MICROPY_EXTMOD_DIR}/vfs_lfs.c
${MICROPY_EXTMOD_DIR}/vfs_rom.c
${MICROPY_EXTMOD_DIR}/vfs_rom_file.c
${MICROPY_EXTMOD_DIR}/vfs_posix.c
${MICROPY_EXTMOD_DIR}/vfs_posix_file.c
${MICROPY_EXTMOD_DIR}/vfs_reader.c
${MICROPY_EXTMOD_DIR}/virtpin.c
${MICROPY_EXTMOD_DIR}/nimble/modbluetooth_nimble.c
)
# Single-precision libm math library.
set(MICROPY_SOURCE_LIB_LIBM
${MICROPY_DIR}/lib/libm/acoshf.c
${MICROPY_DIR}/lib/libm/asinfacosf.c
${MICROPY_DIR}/lib/libm/asinhf.c
${MICROPY_DIR}/lib/libm/atan2f.c
${MICROPY_DIR}/lib/libm/atanf.c
${MICROPY_DIR}/lib/libm/atanhf.c
${MICROPY_DIR}/lib/libm/ef_rem_pio2.c
${MICROPY_DIR}/lib/libm/erf_lgamma.c
${MICROPY_DIR}/lib/libm/fmodf.c
${MICROPY_DIR}/lib/libm/kf_cos.c
${MICROPY_DIR}/lib/libm/kf_rem_pio2.c
${MICROPY_DIR}/lib/libm/kf_sin.c
${MICROPY_DIR}/lib/libm/kf_tan.c
${MICROPY_DIR}/lib/libm/log1pf.c
${MICROPY_DIR}/lib/libm/math.c
${MICROPY_DIR}/lib/libm/nearbyintf.c
${MICROPY_DIR}/lib/libm/roundf.c
${MICROPY_DIR}/lib/libm/sf_cos.c
${MICROPY_DIR}/lib/libm/sf_erf.c
${MICROPY_DIR}/lib/libm/sf_frexp.c
${MICROPY_DIR}/lib/libm/sf_ldexp.c
${MICROPY_DIR}/lib/libm/sf_modf.c
${MICROPY_DIR}/lib/libm/sf_sin.c
${MICROPY_DIR}/lib/libm/sf_tan.c
${MICROPY_DIR}/lib/libm/wf_lgamma.c
${MICROPY_DIR}/lib/libm/wf_tgamma.c
)
# Choose only one of these sqrt implementations, software or hardware.
set(MICROPY_SOURCE_LIB_LIBM_SQRT_SW ${MICROPY_DIR}/lib/libm/ef_sqrt.c)
set(MICROPY_SOURCE_LIB_LIBM_SQRT_HW ${MICROPY_DIR}/lib/libm/thumb_vfp_sqrtf.c)
# Library for btree module and associated code
if(MICROPY_PY_BTREE)
set(MICROPY_LIB_BERKELEY_DIR "${MICROPY_DIR}/lib/berkeley-db-1.xx")
list(APPEND GIT_SUBMODULES lib/berkeley-db-1.xx)
if(NOT UPDATE_SUBMODULES AND NOT EXISTS ${MICROPY_LIB_BERKELEY_DIR}/README)
# Regular build, submodule not initialised -- fail with a clear error.
message(FATAL_ERROR " MICROPY_PY_BTREE is enabled but the berkeley-db submodule is not initialised.\n Run 'make BOARD=${MICROPY_BOARD} submodules'")
endif()
add_library(micropy_extmod_btree OBJECT
${MICROPY_LIB_BERKELEY_DIR}/btree/bt_close.c
${MICROPY_LIB_BERKELEY_DIR}/btree/bt_conv.c
${MICROPY_LIB_BERKELEY_DIR}/btree/bt_debug.c
${MICROPY_LIB_BERKELEY_DIR}/btree/bt_delete.c
${MICROPY_LIB_BERKELEY_DIR}/btree/bt_get.c
${MICROPY_LIB_BERKELEY_DIR}/btree/bt_open.c
${MICROPY_LIB_BERKELEY_DIR}/btree/bt_overflow.c
${MICROPY_LIB_BERKELEY_DIR}/btree/bt_page.c
${MICROPY_LIB_BERKELEY_DIR}/btree/bt_put.c
${MICROPY_LIB_BERKELEY_DIR}/btree/bt_search.c
${MICROPY_LIB_BERKELEY_DIR}/btree/bt_seq.c
${MICROPY_LIB_BERKELEY_DIR}/btree/bt_split.c
${MICROPY_LIB_BERKELEY_DIR}/btree/bt_utils.c
${MICROPY_LIB_BERKELEY_DIR}/mpool/mpool.c
)
target_include_directories(micropy_extmod_btree PRIVATE
${MICROPY_LIB_BERKELEY_DIR}/include
)
if(NOT BERKELEY_DB_CONFIG_FILE)
set(BERKELEY_DB_CONFIG_FILE "${MICROPY_DIR}/extmod/berkeley-db/berkeley_db_config_port.h")
endif()
target_compile_definitions(micropy_extmod_btree PRIVATE
BERKELEY_DB_CONFIG_FILE="${BERKELEY_DB_CONFIG_FILE}"
)
# The include directories and compile definitions below are needed to build
# modbtree.c and should be added to the main MicroPython target.
list(APPEND MICROPY_INC_CORE
"${MICROPY_LIB_BERKELEY_DIR}/include"
)
list(APPEND MICROPY_DEF_CORE
MICROPY_PY_BTREE=1
BERKELEY_DB_CONFIG_FILE="${BERKELEY_DB_CONFIG_FILE}"
)
list(APPEND MICROPY_SOURCE_EXTMOD
${MICROPY_EXTMOD_DIR}/modbtree.c
)
endif()
# Library for mbedtls
if(MICROPY_SSL_MBEDTLS)
add_library(micropy_lib_mbedtls INTERFACE)
set(MICROPY_LIB_MBEDTLS_DIR "${MICROPY_DIR}/lib/mbedtls")
target_include_directories(micropy_lib_mbedtls INTERFACE
${MICROPY_LIB_MBEDTLS_DIR}/include
)
target_sources(micropy_lib_mbedtls INTERFACE
${MICROPY_DIR}/lib/mbedtls_errors/mp_mbedtls_errors.c
${MICROPY_LIB_MBEDTLS_DIR}/library/aes.c
${MICROPY_LIB_MBEDTLS_DIR}/library/aesni.c
${MICROPY_LIB_MBEDTLS_DIR}/library/asn1parse.c
${MICROPY_LIB_MBEDTLS_DIR}/library/asn1write.c
${MICROPY_LIB_MBEDTLS_DIR}/library/base64.c
${MICROPY_LIB_MBEDTLS_DIR}/library/bignum_core.c
${MICROPY_LIB_MBEDTLS_DIR}/library/bignum_mod.c
${MICROPY_LIB_MBEDTLS_DIR}/library/bignum_mod_raw.c
${MICROPY_LIB_MBEDTLS_DIR}/library/bignum.c
${MICROPY_LIB_MBEDTLS_DIR}/library/camellia.c
${MICROPY_LIB_MBEDTLS_DIR}/library/ccm.c
${MICROPY_LIB_MBEDTLS_DIR}/library/chacha20.c
${MICROPY_LIB_MBEDTLS_DIR}/library/chachapoly.c
${MICROPY_LIB_MBEDTLS_DIR}/library/cipher.c
${MICROPY_LIB_MBEDTLS_DIR}/library/cipher_wrap.c
${MICROPY_LIB_MBEDTLS_DIR}/library/nist_kw.c
${MICROPY_LIB_MBEDTLS_DIR}/library/aria.c
${MICROPY_LIB_MBEDTLS_DIR}/library/cmac.c
${MICROPY_LIB_MBEDTLS_DIR}/library/mps_reader.c
${MICROPY_LIB_MBEDTLS_DIR}/library/mps_trace.c
${MICROPY_LIB_MBEDTLS_DIR}/library/ctr_drbg.c
${MICROPY_LIB_MBEDTLS_DIR}/library/debug.c
${MICROPY_LIB_MBEDTLS_DIR}/library/des.c
${MICROPY_LIB_MBEDTLS_DIR}/library/dhm.c
${MICROPY_LIB_MBEDTLS_DIR}/library/ecdh.c
${MICROPY_LIB_MBEDTLS_DIR}/library/ecdsa.c
${MICROPY_LIB_MBEDTLS_DIR}/library/ecjpake.c
${MICROPY_LIB_MBEDTLS_DIR}/library/ecp.c
${MICROPY_LIB_MBEDTLS_DIR}/library/ecp_curves.c
${MICROPY_LIB_MBEDTLS_DIR}/library/entropy.c
${MICROPY_LIB_MBEDTLS_DIR}/library/entropy_poll.c
${MICROPY_LIB_MBEDTLS_DIR}/library/gcm.c
${MICROPY_LIB_MBEDTLS_DIR}/library/hmac_drbg.c
${MICROPY_LIB_MBEDTLS_DIR}/library/md5.c
${MICROPY_LIB_MBEDTLS_DIR}/library/md.c
${MICROPY_LIB_MBEDTLS_DIR}/library/oid.c
${MICROPY_LIB_MBEDTLS_DIR}/library/padlock.c
${MICROPY_LIB_MBEDTLS_DIR}/library/pem.c
${MICROPY_LIB_MBEDTLS_DIR}/library/pk.c
${MICROPY_LIB_MBEDTLS_DIR}/library/pkcs12.c
${MICROPY_LIB_MBEDTLS_DIR}/library/pkcs5.c
${MICROPY_LIB_MBEDTLS_DIR}/library/pkparse.c
${MICROPY_LIB_MBEDTLS_DIR}/library/pk_ecc.c
${MICROPY_LIB_MBEDTLS_DIR}/library/pk_wrap.c
${MICROPY_LIB_MBEDTLS_DIR}/library/pkwrite.c
${MICROPY_LIB_MBEDTLS_DIR}/library/platform.c
${MICROPY_LIB_MBEDTLS_DIR}/library/platform_util.c
${MICROPY_LIB_MBEDTLS_DIR}/library/poly1305.c
${MICROPY_LIB_MBEDTLS_DIR}/library/ripemd160.c
${MICROPY_LIB_MBEDTLS_DIR}/library/rsa.c
${MICROPY_LIB_MBEDTLS_DIR}/library/rsa_alt_helpers.c
${MICROPY_LIB_MBEDTLS_DIR}/library/sha1.c
${MICROPY_LIB_MBEDTLS_DIR}/library/sha256.c
${MICROPY_LIB_MBEDTLS_DIR}/library/sha512.c
${MICROPY_LIB_MBEDTLS_DIR}/library/ssl_cache.c
${MICROPY_LIB_MBEDTLS_DIR}/library/ssl_ciphersuites.c
${MICROPY_LIB_MBEDTLS_DIR}/library/ssl_tls12_client.c
${MICROPY_LIB_MBEDTLS_DIR}/library/ssl_tls12_server.c
${MICROPY_LIB_MBEDTLS_DIR}/library/ssl_client.c
${MICROPY_LIB_MBEDTLS_DIR}/library/ssl_cookie.c
${MICROPY_LIB_MBEDTLS_DIR}/library/ssl_debug_helpers_generated.c
${MICROPY_LIB_MBEDTLS_DIR}/library/ssl_msg.c
${MICROPY_LIB_MBEDTLS_DIR}/library/ssl_ticket.c
${MICROPY_LIB_MBEDTLS_DIR}/library/ssl_tls.c
${MICROPY_LIB_MBEDTLS_DIR}/library/timing.c
${MICROPY_LIB_MBEDTLS_DIR}/library/constant_time.c
${MICROPY_LIB_MBEDTLS_DIR}/library/x509.c
${MICROPY_LIB_MBEDTLS_DIR}/library/x509_create.c
${MICROPY_LIB_MBEDTLS_DIR}/library/x509_crl.c
${MICROPY_LIB_MBEDTLS_DIR}/library/x509_crt.c
${MICROPY_LIB_MBEDTLS_DIR}/library/x509_csr.c
${MICROPY_LIB_MBEDTLS_DIR}/library/x509write_crt.c
${MICROPY_LIB_MBEDTLS_DIR}/library/x509write_csr.c
)
if(NOT MBEDTLS_CONFIG_FILE)
set(MBEDTLS_CONFIG_FILE "${MICROPY_PORT_DIR}/mbedtls/mbedtls_config_port.h")
endif()
target_compile_definitions(micropy_lib_mbedtls INTERFACE
MBEDTLS_CONFIG_FILE="${MBEDTLS_CONFIG_FILE}"
)
list(APPEND MICROPY_INC_CORE
"${MICROPY_LIB_MBEDTLS_DIR}/include"
)
endif()
# Library for lwIP network stack
if(MICROPY_PY_LWIP)
add_library(micropy_lib_lwip INTERFACE)
set(MICROPY_LIB_LWIP_DIR "${MICROPY_DIR}/lib/lwip/src")
target_include_directories(micropy_lib_lwip INTERFACE
${MICROPY_LIB_LWIP_DIR}/include
)
target_sources(micropy_lib_lwip INTERFACE
${MICROPY_DIR}/shared/netutils/netutils.c
${MICROPY_LIB_LWIP_DIR}/apps/mdns/mdns.c
${MICROPY_LIB_LWIP_DIR}/apps/mdns/mdns_domain.c
${MICROPY_LIB_LWIP_DIR}/apps/mdns/mdns_out.c
${MICROPY_LIB_LWIP_DIR}/core/def.c
${MICROPY_LIB_LWIP_DIR}/core/dns.c
${MICROPY_LIB_LWIP_DIR}/core/inet_chksum.c
${MICROPY_LIB_LWIP_DIR}/core/init.c
${MICROPY_LIB_LWIP_DIR}/core/ip.c
${MICROPY_LIB_LWIP_DIR}/core/ipv4/acd.c
${MICROPY_LIB_LWIP_DIR}/core/ipv4/autoip.c
${MICROPY_LIB_LWIP_DIR}/core/ipv4/dhcp.c
${MICROPY_LIB_LWIP_DIR}/core/ipv4/etharp.c
${MICROPY_LIB_LWIP_DIR}/core/ipv4/icmp.c
${MICROPY_LIB_LWIP_DIR}/core/ipv4/igmp.c
${MICROPY_LIB_LWIP_DIR}/core/ipv4/ip4.c
${MICROPY_LIB_LWIP_DIR}/core/ipv4/ip4_addr.c
${MICROPY_LIB_LWIP_DIR}/core/ipv4/ip4_frag.c
${MICROPY_LIB_LWIP_DIR}/core/ipv6/dhcp6.c
${MICROPY_LIB_LWIP_DIR}/core/ipv6/ethip6.c
${MICROPY_LIB_LWIP_DIR}/core/ipv6/icmp6.c
${MICROPY_LIB_LWIP_DIR}/core/ipv6/inet6.c
${MICROPY_LIB_LWIP_DIR}/core/ipv6/ip6.c
${MICROPY_LIB_LWIP_DIR}/core/ipv6/ip6_addr.c
${MICROPY_LIB_LWIP_DIR}/core/ipv6/ip6_frag.c
${MICROPY_LIB_LWIP_DIR}/core/ipv6/mld6.c
${MICROPY_LIB_LWIP_DIR}/core/ipv6/nd6.c
${MICROPY_LIB_LWIP_DIR}/core/mem.c
${MICROPY_LIB_LWIP_DIR}/core/memp.c
${MICROPY_LIB_LWIP_DIR}/core/netif.c
${MICROPY_LIB_LWIP_DIR}/core/pbuf.c
${MICROPY_LIB_LWIP_DIR}/core/raw.c
${MICROPY_LIB_LWIP_DIR}/core/stats.c
${MICROPY_LIB_LWIP_DIR}/core/sys.c
${MICROPY_LIB_LWIP_DIR}/core/tcp.c
${MICROPY_LIB_LWIP_DIR}/core/tcp_in.c
${MICROPY_LIB_LWIP_DIR}/core/tcp_out.c
${MICROPY_LIB_LWIP_DIR}/core/timeouts.c
${MICROPY_LIB_LWIP_DIR}/core/udp.c
${MICROPY_LIB_LWIP_DIR}/netif/ethernet.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/auth.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/ccp.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/chap-md5.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/chap_ms.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/chap-new.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/demand.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/eap.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/ecp.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/eui64.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/fsm.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/ipcp.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/ipv6cp.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/lcp.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/magic.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/mppe.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/multilink.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/polarssl/md5.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/pppapi.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/ppp.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/pppcrypt.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/pppoe.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/pppol2tp.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/pppos.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/upap.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/utils.c
${MICROPY_LIB_LWIP_DIR}/netif/ppp/vj.c
)
list(APPEND MICROPY_INC_CORE
${MICROPY_LIB_LWIP_DIR}/include
)
list(APPEND GIT_SUBMODULES lib/lwip)
endif()
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