Презентация Easy access to embedded at SIM800(R) онлайн
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Слайды и текст к этой презентации:
№1 слайд
Содержание слайда: EASY ACCESS to EMBEDDED AT
SIM800(R)
№2 слайд
Содержание слайда: Content
№3 слайд
Содержание слайда: 1. Embedded AT Core Conception
№4 слайд
Содержание слайда: 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
№5 слайд
Содержание слайда: 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
№6 слайд
Содержание слайда: 1.3 Programming Style
MCU Framework
void main(void)
{
Init Hardware();
Init Variable();
Start Timer();
while(TRUE)
{
Progress ModemData();
Progress Timer();
….
}}
№7 слайд
Содержание слайда: 2. Embedded AT Functions
№8 слайд
Содержание слайда: 2.1 Send and Receive AT Command
№9 слайд
Содержание слайда: 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.
№10 слайд
Содержание слайда: 2.2 FLASH Operation
2.2.1 Read data
2.2.2 Write Data
2.2.3 Other Flash APIs
№11 слайд
Содержание слайда: 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().
№12 слайд
Содержание слайда: 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.
№13 слайд
Содержание слайда: 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);
№14 слайд
Содержание слайда: 2.3 Timer
2.3.1 Start / Stop Timer
2.3.2 Timer EVENT
2.3.3 Get System time
№15 слайд
Содержание слайда: 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);
№16 слайд
Содержание слайда: 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.
№17 слайд
Содержание слайда: 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.
№18 слайд
Содержание слайда: 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
№19 слайд
Содержание слайда: 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
№20 слайд
Содержание слайда: 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
№21 слайд
Содержание слайда: 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
№22 слайд
Содержание слайда: 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;
№23 слайд
Содержание слайда: 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
№24 слайд
Содержание слайда: 2.4.4 Configure PIN to Be Interruptable
5. Circuit Diagram to Detect GPIO interrupt
№25 слайд
Содержание слайда: 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.
№26 слайд
Содержание слайда: 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
№27 слайд
Содержание слайда: 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;
№28 слайд
Содержание слайда: 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
№29 слайд
Содержание слайда: 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
№30 слайд
Содержание слайда: 2.6.1 UART
2 UART
1 USB (usb2serial)
№31 слайд
Содержание слайда: 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.
№32 слайд
Содержание слайда: 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
№33 слайд
Содержание слайда: 2.6.3 Configure UART as data mode
№34 слайд
Содержание слайда: 3. ADC Detection Example
№35 слайд
Содержание слайда: 3.1 Function Description
№36 слайд
Содержание слайда: 3.2 Design Flow
№37 слайд
Содержание слайда: Thanks!
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