[개발노트] esp32c3 적용.

요점

esp32c3의 spi모드가 2-->3으로 변경되어야하므로, esp32c3의 prebuild이미지는 사용할수가 없음.

uart hci는 사용하지않고 spi로만 사용함.-->vhci 모드라고 함.

블루투스는 표준규칙을 잘 따르는듯 한데 wifi는 약간 야매느낌이다.

wifi는 esp32에서 다 해주고. 뭔가 별도의 내부프로토콜로 esp32로의 통신을 중계해주는 구라 network interface 인듯함. 그래서 쓰는법도 좀 다른듯하고 해서 찬찬히 연구해볼필요있음.

순서.

1. esp-hosted의 리눅스 드라이버 빌드

esp-hosted/host/linux/host_driver/esp32/spi/esp_spi.c 아래와 같이 수정.

    //esp_board.mode = SPI_MODE_2;

    esp_board.mode = SPI_MODE_3;

    //esp_board.max_speed_hz = spi_clk_mhz * NUMBER_1M;

    esp_board.max_speed_hz = 5 * NUMBER_1M;

  esp-hosted/host/linux/host_driver/esp32/spi/esp_spi.h 핀번호 변경 ev1 값이므로 ssonic은 다른 번호겠지.  

//#define HANDSHAKE_PIN           111 //evm

#define HANDSHAKE_PIN           105 // ssonic gpiog15

#define SPI_IRQ                 gpio_to_irq(HANDSHAKE_PIN)

//#define SPI_DATA_READY_PIN      55 // evm

#define SPI_DATA_READY_PIN      77 // ssonic gpiob9

#define SPI_DATA_READY_IRQ      gpio_to_irq(SPI_DATA_READY_PIN)

  esp-hosted/host/linux/host_driver/esp32/main.c delay있는 두줄 추가.   

#define HOST_GPIO_PIN_INVALID -1

static int resetpin = HOST_GPIO_PIN_INVALID;

static int delay = 0;

module_param(resetpin, int, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);

MODULE_PARM_DESC(resetpin, "Host's GPIO pin number which is connected to ESP32's EN to reset ESP32 device");

module_param(delay, int, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);

#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0))

source /home/happycpu/work/Developer-Package/SDK/environment-setup-cortexa7t2hf-neon-vfpv4-ostl-linux-gnueabi

export KERNEL=/home/happycpu/work/Developer-Package/stm32mp1-openstlinux-5.10-dunfell-mp1-21-11-17/sources/arm-ostl-linux-gnueabi/linux-stm32mp-5.10.61-stm32mp-r2-r0/linux-5.10.61.ev1
make target=spi ARCH=$ARCH CROSS_COMPILE=$CROSS_COMPILE KERNEL=$KERNEL resetpin=3 

#resetpin은 컴파일할데 인자로 리셋핀을 지정하는 방법임. 지정하지않을경우, 기본3으로 정의됨.gpio번호임. 다른거라면 다른번호로 지정해야함.

happycpu@happycpubox:~/work/testproj/esp-hosted/host/linux/host_driver/esp32$ source /home/happycpu/work/Developer-Package/SDK/environment-setup-cortexa7t2hf-neon-vfpv4-ostl-linux-gnueabi
happycpu@happycpubox:~/work/testproj/esp-hosted/host/linux/host_driver/esp32$ export KERNEL=/home/happycpu/work/Developer-Package/stm32mp1-openstlinux-5.10-dunfell-mp1-21-11-17/sources/arm-ostl-linux-gnueabi/linux-stm32mp-5.10.61-stm32mp-r2-r0/linux-5.10.61.ev1
happycpu@happycpubox:~/work/testproj/esp-hosted/host/linux/host_driver/esp32$ make target=spi ARCH=$ARCH CROSS_COMPILE=$CROSS_COMPILE KERNEL=$KERNEL resetpin=3
rm -rf *.o sdio/*.o spi/*.o *.ko
make ARCH=arm CROSS_COMPILE=arm-ostl-linux-gnueabi- -C /home/happycpu/work/Developer-Package/stm32mp1-openstlinux-5.10-dunfell-mp1-21-11-17/sources/arm-ostl-linux-gnueabi/linux-stm32mp-5.10.61-stm32mp-r2-r0/linux-5.10.61.ev1 M=/home/happycpu/work/testproj/esp-hosted/host/linux/host_driver/esp32 clean
make[1]: 디렉터리 '/home/happycpu/work/Developer-Package/stm32mp1-openstlinux-5.10-dunfell-mp1-21-11-17/sources/arm-ostl-linux-gnueabi/linux-stm32mp-5.10.61-stm32mp-r2-r0/linux-5.10.61.ev1' 들어감
  CLEAN   /home/happycpu/work/testproj/esp-hosted/host/linux/host_driver/esp32/Module.symvers
make[1]: 디렉터리 '/home/happycpu/work/Developer-Package/stm32mp1-openstlinux-5.10-dunfell-mp1-21-11-17/sources/arm-ostl-linux-gnueabi/linux-stm32mp-5.10.61-stm32mp-r2-r0/linux-5.10.61.ev1' 나감
make ARCH=arm CROSS_COMPILE=arm-ostl-linux-gnueabi- -C /home/happycpu/work/Developer-Package/stm32mp1-openstlinux-5.10-dunfell-mp1-21-11-17/sources/arm-ostl-linux-gnueabi/linux-stm32mp-5.10.61-stm32mp-r2-r0/linux-5.10.61.ev1 M=/home/happycpu/work/testproj/esp-hosted/host/linux/host_driver/esp32 modules
make[1]: 디렉터리 '/home/happycpu/work/Developer-Package/stm32mp1-openstlinux-5.10-dunfell-mp1-21-11-17/sources/arm-ostl-linux-gnueabi/linux-stm32mp-5.10.61-stm32mp-r2-r0/linux-5.10.61.ev1' 들어감
  CC [M]  /home/happycpu/work/testproj/esp-hosted/host/linux/host_driver/esp32/esp_bt.o
  CC [M]  /home/happycpu/work/testproj/esp-hosted/host/linux/host_driver/esp32/main.o
  CC [M]  /home/happycpu/work/testproj/esp-hosted/host/linux/host_driver/esp32/spi/esp_spi.o
  CC [M]  /home/happycpu/work/testproj/esp-hosted/host/linux/host_driver/esp32/esp_serial.o
  CC [M]  /home/happycpu/work/testproj/esp-hosted/host/linux/host_driver/esp32/esp_rb.o
  LD [M]  /home/happycpu/work/testproj/esp-hosted/host/linux/host_driver/esp32/esp32_spi.o
  MODPOST /home/happycpu/work/testproj/esp-hosted/host/linux/host_driver/esp32/Module.symvers
  CC [M]  /home/happycpu/work/testproj/esp-hosted/host/linux/host_driver/esp32/esp32_spi.mod.o
  LD [M]  /home/happycpu/work/testproj/esp-hosted/host/linux/host_driver/esp32/esp32_spi.ko
make[1]: 디렉터리 '/home/happycpu/work/Developer-Package/stm32mp1-openstlinux-5.10-dunfell-mp1-21-11-17/sources/arm-ostl-linux-gnueabi/linux-stm32mp-5.10.61-stm32mp-r2-r0/linux-5.10.61.ev1' 나감
happycpu@happycpubox:~/work/testproj/esp-hosted/host/linux/host_driver/esp32$ 

출력파일은 

happycpu@happycpubox:~/work/testproj/esp-hosted/host/linux/host_driver/esp32$ ls
LICENSE   Module.symvers  esp32_spi.ko   esp32_spi.mod.c  esp32_spi.o  esp_bt.c  esp_bt_api.h  esp_rb.c  esp_rb.o      esp_serial.h  main.c  modules.order  spi
Makefile  esp.h           esp32_spi.mod  esp32_spi.mod.o  esp_api.h    esp_bt.o  esp_if.h      esp_rb.h  esp_serial.c  esp_serial.o  main.o  sdio
happycpu@happycpubox:~/work/testproj/esp-hosted/host/linux/host_driver/esp32$ 

scp로 넘겨서 사용. 향후 드라이버는 커널에 합치고, 아래 dev파일은 rootfs에 미리 만들어놓는다. 그래서 부팅하면서 자연스럽게 드라이버까지 올라가도록 

rmmod esp32_spi &> /dev/null
insmod esp32_spi.ko resetpin=3
mknod /dev/esps0 c 221 0
chmod 666 /dev/esps0

2. esp-hosted의 esp32c3용 driver수정.

  esp-hosted/esp/esp_driver/network_adapter/main/spi_slave_api.c 수정 SPI_MODE_3 으로..

    /* Configuration for the SPI slave interface */

    spi_slave_interface_config_t slvcfg={

        //.mode=SPI_MODE_2,

        .mode=SPI_MODE_3,

        .spics_io_num=GPIO_CS,

        .queue_size=SPI_QUEUE_SIZE,

        .flags=0,

        .post_setup_cb=spi_post_setup_cb,

        .post_trans_cb=spi_post_trans_cb

    };

3. esp-hosted의 test용 app 빌드

파이썬이 아닌 c언어 app으로 드라이버를 제어하는 유틸 및 api사용법, api라이브러리 사용법등이 이곳에 있음.

샘플 test.out 파일을 컴파일한다. (그걸로 ap scan 등등을 드라이버로 시킬수있다)

esp-hosted/esp-hosted/host/linux/host_control/c_support

Makefile 수정

첫쩨줄의 gcc를 주석처리함.

#CC = gcc

CROSS_COMPILE :=

컴파일

happycpu@happycpubox:~/work/esp-hosted/esp-hosted/host/linux/host_control/c_support$ make
arm-ostl-linux-gnueabi-gcc  -mthumb -mfpu=neon-vfpv4 -mfloat-abi=hard -mcpu=cortex-a7 --sysroot=/home/happycpu/work/Developer-Package/SDK/sysroots/cortexa7t2hf-neon-vfpv4-ostl-linux-gnueabi -C -Wall  -I/home/happycpu/work/esp-hosted/esp-hosted/host/linux/host_control/c_support/../../../host_common/include/ -I/home/happycpu/work/esp-hosted/esp-hosted/host/linux/host_control/c_support/../../../../common//protobuf-c/ -I/home/happycpu/work/esp-hosted/esp-hosted/host/linux/host_control/c_support/../../../../common//include/ /home/happycpu/work/esp-hosted/esp-hosted/host/linux/host_control/c_support/../../../../common//protobuf-c/protobuf-c/protobuf-c.c /home/happycpu/work/esp-hosted/esp-hosted/host/linux/host_control/c_support/platform_wrapper.c /home/happycpu/work/esp-hosted/esp-hosted/host/linux/host_control/c_support/../../../../common//esp_hosted_config.pb-c.c /home/happycpu/work/esp-hosted/esp-hosted/host/linux/host_control/c_support/../../../host_common/transport_pserial.c /home/happycpu/work/esp-hosted/esp-hosted/host/linux/host_control/c_support/../../../host_common/commands.c test_api.c test.c -o test.out
happycpu@happycpubox:~/work/esp-hosted/esp-hosted/host/linux/host_control/c_support$ ls
Makefile  platform_wrapper.c  stress.c  test.c  test.out  test_api.c  test_api.h  test_config.h

scp로 넘겨서 사용.

4. device tree

실컷 유저모드 spi설정 다 해놓고선. 마지막에 다시 disable하는것이 끝.

// stm32mp157c-ev1 board.

&spi1{

    pinctrl-names = "default", "sleep";

    pinctrl-0 = <&spi1_pins_z_mx>;

    pinctrl-1 = <&spi1_sleep_pins_z_mx>;

    status = "okay";

    cs-gpios = <&gpioz 3 0>;

    bus-num = <1>;

    num-chipselects = <1>;

   

    #address-cells = <1>;

    #size-cells = <0>;

    spidev1: spi@1{

        status = "okay";

        compatible = "spidev";

        reg = <0>;

        spi-max-frequency = <10000000>;

    };

};

&spidev1{

    status = "disable";

};

//////////////////////////////////////////

// stm32mp153d-ssonic

&spi2{

    pinctrl-names = "default","sleep";

    pinctrl-0 = <&spi2_pins_mx>;

    pinctrl-1 = <&spi2_sleep_pins_mx>;

    status = "okay";

    cs-gpios = <&gpiob 25 0>;

    // /delete-property/dmas;

    // /delete-property/dma-names;

    spidev:spidev@0{

        compatible = "linux,spidev";

        status = "okay";

        reg = <0>;

        spi-max-frequency = <10000000>;

    };

};

&spidev{

    status = "disable";

};

5. yocto bluez

버전을 꼭 높은것을 써야 Codedphy를 사용할수있을듯

레시피에 추가한다. bblayer.conf

참, esp32c3용으로 빌드는

idf.py set-target esp32c3