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Вы можете ознакомиться и скачать презентацию на тему Easy access to embedded at SIM800(R). Доклад-сообщение содержит 37 слайдов. Презентации для любого класса можно скачать бесплатно. Если материал и наш сайт презентаций Mypresentation Вам понравились – поделитесь им с друзьями с помощью социальных кнопок и добавьте в закладки в своем браузере.

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EASY ACCESS to EMBEDDED AT SIM800(R)

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Content

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1. Embedded AT Core Conception

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1.1 Embedded AT Core Conception Purpose: Embedded AT will fully utilize SIM800/H resources, provide interfaces to move external MCU functions inside SIM800/H, so as to save customer’s cost. Programming Idea: Think from MCU side Similar MCU programming style

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1.2 Think from MCU Side What an external MCU do Programming to implement functions through serial port by sending/responding AT commands Read/write Flash Timer GPIO /Keypad/SPI /ADC configure and interrupt

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1.3 Programming Style MCU Framework void main(void) { Init Hardware(); Init Variable(); Start Timer(); while(TRUE) { Progress ModemData(); Progress Timer(); …. }}

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2. Embedded AT Functions

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2.1 Send and Receive AT Command

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$Example: Example: Send “AT+CNETLIGHT=0”when powering on and get response. void app_main(void) { APP_InitRegions(); APP_init_clib(); …...$

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Example: Example: Send “AT+CNETLIGHT=0”when powering on and get response. void app_main(void) { APP_InitRegions(); APP_init_clib(); … Eat_modem_write(“AT+CNETLIGHT=0\r”,strlen(“AT+CNETLIGHT=0\r”)); while(TRUE) { eat_get_event(&event); switch (event.event) { case EAT_EVENT_MDM_READY_RD: { Progress(); } case … }}} For more details please refer to the rich examples we provided.

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2.2 FLASH Operation 2.2.1 Read data 2.2.2 Write Data 2.2.3 Other Flash APIs

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2.2.1 Read Data Step1: Define a global array u8 Buffer[8*1024] Step2: Read flash data from flash address S32 eat_flash_read(Buffer,flash_addr,len) Return readed data len: Read data from flash successfully, the data are saved in the buffer. The flash address is between eat_get_app_base_addr() and eat_get_app_base_addr()+eat_get_app_space().

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2.2.2 Write Data Step1: Define a global array u8 Buffer[8*1024] Step2: Fill the data to be saved into Buffer memcpy(Buffer,string,len) Step3: Call function, write data eat_bool eat_flash_write(addr,Buffer, len) Return EAT_TRUE: Write data to flash successfully. Note: It is necessary that erasing the flash block before writing data to flash.

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2.2.3 Other Flash APIs 1. Delete flash data from related address eat_bool eat_flash_erase(flash_addr, len) 2. Acquire APP Space Size u32 eat_get_app_space() 3. Get APP base address u32 eat_get_app_base_addr() 4.Upadte APP void eat_update_app(*app_code_addr, *app_code_new_addr, len, pin_wd, pin_led, lcd_bl);

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2.3 Timer 2.3.1 Start / Stop Timer 2.3.2 Timer EVENT 2.3.3 Get System time

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2.3.2 Start / Stop Timer Start or stop timer Soft timer: Start timer: eat_timer_start(timer_id, expire_ms); Stop timer: eat_timer_stop(timer_id) Return EAT_TRUE: Start /stop a timer successfully. Hardware timer: eat_gpt_start(expire_61us,loop, gpt_expire_cb_fun);

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2.3.3 Timer EVENT When the timer expires, the soft timer will send a event EAT_EVENT_TIMER to APP ,but the hw timer will call function in APP direct.

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$2.3.4 Get System Time 1. EatRtc_st structure typedef struct { unsigned char sec; /* [0, 59] */ unsigned char min; /* [0,59] */ unsigned char hour; /*...$

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2.3.4 Get System Time 1. EatRtc_st structure typedef struct { unsigned char sec; /* [0, 59] */ unsigned char min; /* [0,59] */ unsigned char hour; /* [0,23] */ unsigned char day; /* [1,31] */ unsigned char mon; /* [1,12] */ unsigned char wday; /* [1,7] */ unsigned char year; /* [0,127] */ } EatRtc_st; 2. Get the system time eat_bool eat_get_rtc (EatRtc_st * datetime) The current local time will be stored in the datatime structure.

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2.4 Configuration and Usage of GPIO 2.4.1 Pins for GPIO 2.4.2 Configure PIN to GPO 2.4.3 Configure PIN to GPI 2.4.4 Configure PIN to be Interruptable 2.4.5 Configure PIN for Keypad

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$2.4.1 Pins for GPIO Available GPIOs in SIM800H typedef enum FlPinNameTag { EAT_PIN3_GPIO1, EAT_PIN4_STATUS, … EAT_PIN74_SCL, EAT_PIN75_SDA,...$

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2.4.1 Pins for GPIO Available GPIOs in SIM800H typedef enum FlPinNameTag { EAT_PIN3_GPIO1, EAT_PIN4_STATUS, … EAT_PIN74_SCL, EAT_PIN75_SDA, EAT_PIN_NUM } EatPinName_enum; Please refer “eat_peripher.h” for details

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2.4.2 Configure PIN to GPIO and output mode Step1: Configure the target PIN as GPIO eat_bool eat_pin_set_mode(PIN, EAT_PIN_MODE_GPIO); Return EAT_TRUE : Configure status successful Step2: Configure the target GPIO to be out and high level or low eat_bool eat_gpio_setup(PIN, EAT_GPIO_DIR_OUTPUT , EAT_GPIO_LEVEL_HIGH) Return EAT_TRUE : Configuration successful

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2.4.3 Configure PIN to GPIO of input mode Step1: Configure the target PIN as GPIO eat_bool eat_pin_set_mode(PIN, EAT_PIN_MODE_GPIO); Return EAT_TRUE : Configure status successful Step2: Configure the target GPIO to be in eat_bool eat_gpio_setup(PIN, EAT_GPIO_DIR_INPUT , 0) Return EAT_TRUE : Configuration successful Step3: Read PIN status EatGpioLevel_enum eat_gpio_read(PIN) Return EAT_GPIO_LEVEL_LOW or EAT_GPIO_LEVEL_HIGH

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2.4.4 Configure PIN to Be Interruptable 1. In SIM800, PINs with interrupt function EAT_PIN34_SIM_PRE, EAT_PIN35_PWM1, EAT_PIN36_PWM2, EAT_PIN40_ROW4, EAT_PIN47_COL4 2. Interrupt Trigger Type typedef enum { EAT_INT_TRIGGER_HIGH_LEVEL, EAT_INT_TRIGGER_LOW_LEVEL, EAT_INT_TRIGGER_RISING_EDGE, EAT_INT_TRIGGER_FALLING_EDGE, EAT_INT_TRIGGER_NUM } EatIntTrigger_enum;

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2.4.4 Configure PIN to Be Interruptable 3. Configure the target GPIO to interrupt mode eat_bool eat_pin_set_mode(PIN35, EAT_PIN_MODE_EINT); Return EAT_TRUE: Configure status successful 4. Configure PIN24 to rising edge trigger type, 10ms debound eat_bool eat_int_setup(PIN35, EAT_INT_TRIGGER_RISING_EDGE, 10, NULL); Return EAT_TRUE : Configuration successful

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2.4.4 Configure PIN to Be Interruptable 5. Circuit Diagram to Detect GPIO interrupt

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2.4.5 Configure PIN for Keypad 1. Initializes keypad pins eat_bool eat_pin_set_mode(pin, EAT_PIN_MODE_KEY); Note: If any of the KEYPAD pin is configured as keypad, all KEYPAD pins are KEYPAD; If any of the KEYPAD pin is configured as GPIO, then all KEYPAD pins are GPIO.

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2.4.5 Configure PIN for Keypad 2. Following GPIOs can be configured to keypad in SIM800: EAT_PIN40_ROW4~ EAT_PIN44_ROW0, EAT_PIN47_COL4~EAT_PIN51_COL0

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$2.4.5 Configure PIN for Keypad 3. EAT_EVENT_KEY report to APP 4. The values of each key(key_val) are as following: typedef enum { EAT_KEY_C0R0, ……...$

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2.4.5 Configure PIN for Keypad 3. EAT_EVENT_KEY report to APP 4. The values of each key(key_val) are as following: typedef enum { EAT_KEY_C0R0, …… EAT_KEY_C4R4, EAT_KEY_NUM } EatKey_enum;

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2.5 SPI Interface Configure SPI bus, set according to actual situation eat_bool eat_spi_init(clk, wire, bit, enable_SDI, enable_cs); 2. Write data to SPI bus eat_bool eat_spi_write(*data, len, is_command); 3. Read single byte from SPI bus u8 eat_spi_write_read(*wdata, wlen, * rdata, rlen); Please refer to “eat_periphery.h” for details

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2.6 UART operation 2.6.1 UART 2.6.2 Configure UART as AT port or DEBUG port 2.6.3 Configure UART to data mode

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2.6.1 UART 2 UART 1 USB (usb2serial)

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2.6.2 Configure UART as AT port or DEBUG port 1. AT port eat_bool eat_uart_set_at_port(port) 2. Debug mode eat_bool eat_uart_set_debug(port) Note: a. Only one mode for a port. If UART1 was configured to AT port, then changed to debug mode, the last status of UART1 is debug mode. b. Above interface are only be available in EatEntry_st-> func_ext1 function at initial stage.

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2.6.3 Configure UART as data mode 1. Open the UART eat_bool eat_uart_open(UART) If EAT_FALSE given, that means UART is in AT port mode , or debug mode, or parameters error. 2. Configure the UART eat_uart_set_config(UART, (EatUartConfig_st*)uart_config) 3. Write the data to UART u16 eat_uart_write(UART, *buffer, len) If return value is less than “len”, that means uart buffer is full 4. Read the data from UART u16 eat_uart_read(UART,*buffer, len) “len” is the length for data, the return value is real length. EAT_EVENT_UART_READY_RD ->read