AN3128 datasheet(67/105 Pages) STMICROELECTRONICS

67 / 105 page

AN3128

Multi-input embedded GUI library firmware

Doc ID 16918 Rev 5

67/105

pLcdParam->LCD_Rcc_Apb_Periph

= LCD_RCC_APB_PERIPH;

pLcdParam->LCD_Rcc_Ahb_Periph

= LCD_RCC_AHB_PERIPH;

pLcdParam->LCD_Bus_Port

= LCD_SPI_PORT;

pLcdParam->LCD_Connection_Mode

= LCD_CONNECTION_MODE;

...

}

4.3.4

Touchscreen:: pTscParam API properties

TscHal.c exports the following public structure variable:

TSC_HW_Parameters_TypeDef * pTscHwParam; /* Touchscreen Hardware Parameters

Structure */

pTscParam properties allow setting the hardware communication parameters (Bus GPIO

port, GPIO pins).

●

TSC_PortSource selects the GPIO port to be used as source for event output for the

touchscreen controller

●

TSC_PinSource is the GPIO pin for the event output

●

TSC_Exti_IrqChannel selects the external line interrupts

●

TSC_Exti_Line selects the external interrupt line which the touchscreen controller is

connected to

●

TSC_Gpio_Port is the GPIO port needed for the communication between the

touchscreen controller and micro

●

TSC_Gpio_Pin is the GPIO pin needed for the communication between the

touchscreen controller and micro

●

TSC_DeviceRegister selects the touchscreen controller if two STMPE811s are

connected to be used as the IO expander

●

TSC_Bus_Port is the communication interface channel for the communication between

the touchscreen controller and the microcontroller.

Some examples are listed below:

File: hw_config.h

// Touchscreen Controller DEFINES

#define TSC_GPIO_PORT_SOURCE

GPIO_PortSourceGPIOB

#define TSC_GPIO_PIN_SOURCE

GPIO_PinSource14

#define TSC_EXTI_IRQ_CHANNEL

EXTI15_10_IRQn

#define TSC_EXTI_LINE

EXTI_Line14

#define TSC_GPIO_PORT

GPIOA

#define TSC_GPIO_PIN

GPIO_Pin_14

#define TSC_I2C_DEVICE_REGISTER

0x82

#define TSC_I2C_PORT

I2C1

TSC_HW_Parameters_TypeDef* pTscParam;

File: hw_config.c

void HWConfig_SetHardwareParams(void)

{

...

pTscParam = NewTscHwParamObj();

/* Assign the following value for Touchscreen Controller

Parameters Structure */

pTscParam->TSC_PortSource

= GL_GPIO_TSC_PORT_SOURCE;

pTscParam->TSC_PinSource

= GL_GPIO_TSC_PIN_SOURCE;

pTscParam->TSC_Exti_IrqChannel

= TSC_EXTI_IRQ_CHANNEL;

pTscParam->TSC_Exti_Line

= TSC_EXTI_LINE;

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