采用SX1276无线LoRa扩频通信模块

#include <stdbool.h> #include "stm32f10x.h" #include "board.h" #include "touch.h" #include <rtthread.h> #include <rtgui/event.h> #include <rtgui/kbddef.h> #include <rtgui/rtgui_server.h> #include <rtgui/rtgui_system.h> /* MISO PA6 MOSI PA7 CLK PA5 CS PC4 */ #define CS_0() GPIO_ResetBits(GPIOC,GPIO_Pin_4) #define CS_1() GPIO_SetBits(GPIOC,GPIO_Pin_4) /* 7 6 - 4 3 2 1-0 s A2-A0 MODE SER/DFR PD1-PD0 */ #define TOUCH_MSR_Y 0x90 //读X轴坐标指令 addr:1 #define TOUCH_MSR_X 0xD0 //读Y轴坐标指令 addr:3 struct rtgui_touch_device { struct rt_device parent; rt_timer_t poll_timer; rt_uint16_t x, y; rt_bool_t calibrating; rt_touch_calibration_func_t calibration_func; rt_uint16_t min_x, max_x; rt_uint16_t min_y, max_y; }; static struct rtgui_touch_device *touch = RT_NULL; extern unsigned char SPI_WriteByte(unsigned char data); rt_inline void EXTI_Enable(rt_uint32_t enable); struct rt_semaphore spi1_lock; void rt_hw_spi1_baud_rate(uint16_t SPI_BaudRatePrescaler) { SPI1->CR1 &= ~SPI_BaudRatePrescaler_256; SPI1->CR1 |= SPI_BaudRatePrescaler; } uint8_t SPI_WriteByte(unsigned char data) { //Wait until the transmit buffer is empty while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET); // Send the byte SPI_I2S_SendData(SPI1, data); //Wait until a data is received while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET); // Get the received data data = SPI_I2S_ReceiveData(SPI1); // Return the shifted data return data; } //SPI写数据 static void WriteDataTo7843(unsigned char num) { SPI_WriteByte(num); } #define X_WIDTH 240 #define Y_WIDTH 320 static void rtgui_touch_calculate() { if (touch != RT_NULL) { rt_sem_take(&spi1_lock, RT_WAITING_FOREVER); /* SPI1 configure */ rt_hw_spi1_baud_rate(SPI_BaudRatePrescaler_64);/* 72M/64=1.125M */ //读取触摸值 { rt_uint16_t tmpx[10]; rt_uint16_t tmpy[10]; unsigned int i; /* From the datasheet: * When the very first CLK after the control byte comes in, the * DOUT of ADS7843 is not valid. So we could only get 7bits from * the first SPI_WriteByte. And the got the following 5 bits from * another SPI_WriteByte.(aligned MSB) */ for(i=0; i<10; i++) { CS_0(); WriteDataTo7843(TOUCH_MSR_X); tmpx[i] = (SPI_WriteByte(0x00) & 0x7F) << 5; tmpx[i] |= (SPI_WriteByte(TOUCH_MSR_Y) >> 3) & 0x1F; tmpy[i] = (SPI_WriteByte(0x00) & 0x7F) << 5; tmpy[i] |= (SPI_WriteByte(0x00) >> 3) & 0x1F; WriteDataTo7843( 1<<7 ); /* 打开中断 */ CS_1(); } //去最高值与最低值,再取平均值 { rt_uint32_t min_x = 0xFFFF,min_y = 0xFFFF; rt_uint32_t max_x = 0,max_y = 0; rt_uint32_t total_x = 0; rt_uint32_t total_y = 0; unsigned int i; for(i=0;i<10;i++) { if( tmpx[i] < min_x ) { min_x = tmpx[i]; } if( tmpx[i] > max_x ) { max_x = tmpx[i]; } total_x += tmpx[i]; if( tmpy[i] < min_y ) { min_y = tmpy[i]; } if( tmpy[i] > max_y ) { max_y = tmpy[i]; } total_y += tmpy[i]; } total_x = total_x - min_x - max_x; total_y = total_y - min_y - max_y; touch->x = total_x / 8; touch->y = total_y / 8; }//去最高值与最低值,再取平均值 }//读取触摸值 rt_sem_release(&spi1_lock); /* if it's not in calibration status */ if (touch->calibrating != RT_TRUE) { if (touch->max_x > touch->min_x) { touch->x = (touch->x - touch->min_x) * X_WIDTH/(touch->max_x - touch->min_x); } else if (touch->max_x < touch->min_x) { touch->x = (touch->min_x - touch->x) * X_WIDTH/(touch->min_x - touch->max_x); } if (touch->max_y > touch->min_y) { touch->y = (touch->y - touch->min_y) * Y_WIDTH /(touch->max_y - touch->min_y); } else if (touch->max_y < touch->min_y) { touch->y = (touch->min_y - touch->y) * Y_WIDTH /(touch->min_y - touch->max_y); } // normalize the data if (touch->x & 0x8000) touch->x = 0; else if (touch->x > X_WIDTH) touch->x = X_WIDTH - 1; if (touch->y & 0x8000) touch->y = 0; else if (touch->y > Y_WIDTH) touch->y = Y_WIDTH - 1; } } } void touch_timeout(void* parameter) { static unsigned int touched_down = 0; struct rtgui_event_mouse emouse; static struct _touch_previous { rt_uint32_t x; rt_uint32_t y; } touch_previous; /* touch time is too short and we lost the position already. */ if ((!touched_down) && GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_1) != 0) return; if (GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_1) != 0) { int tmer = RT_TICK_PER_SECOND/8 ; EXTI_Enable(1); emouse.parent.type = RTGUI_EVENT_MOUSE_BUTTON; emouse.button = (RTGUI_MOUSE_BUTTON_LEFT |RTGUI_MOUSE_BUTTON_UP); /* use old value */ emouse.x = touch->x; emouse.y = touch->y; /* stop timer */ rt_timer_stop(touch->poll_timer); rt_kprintf("touch up: (%d, %d)\n", emouse.x, emouse.y); touched_down = 0; if ((touch->calibrating == RT_TRUE) && (touch->calibration_func != RT_NULL)) { /* callback function */ touch->calibration_func(emouse.x, emouse.y); } rt_timer_control(touch->poll_timer , RT_TIMER_CTRL_SET_TIME , &tmer); } else { if(touched_down == 0) { int tmer = RT_TICK_PER_SECOND/20 ; /* calculation */ rtgui_touch_calculate(); /* send mouse event */ emouse.parent.type = RTGUI_EVENT_MOUSE_BUTTON; emouse.parent.sender = RT_NULL; emouse.x = touch->x; emouse.y = touch->y; touch_previous.x = touch->x; touch_previous.y = touch->y; /* init mouse button */ emouse.button = (RTGUI_MOUSE_BUTTON_LEFT |RTGUI_MOUSE_BUTTON_DOWN); // rt_kprintf("touch down: (%d, %d)\n", emouse.x, emouse.y); touched_down = 1; rt_timer_control(touch->poll_timer , RT_TIMER_CTRL_SET_TIME , &tmer); } else { /* calculation */ rtgui_touch_calculate(); #define previous_keep 8 //判断移动距离是否小于previous_keep,减少误动作. if( (touch_previous.x<touch->x+previous_keep) && (touch_previous.x>touch->x-previous_keep) && (touch_previous.y<touch->y+previous_keep) && (touch_previous.y>touch->y-previous_keep) ) { return; } touch_previous.x = touch->x; touch_previous.y = touch->y; /* send mouse event */ emouse.parent.type = RTGUI_EVENT_MOUSE_BUTTON ; emouse.parent.sender = RT_NULL; emouse.x = touch->x; emouse.y = touch->y; /* init mouse button */ emouse.button = (RTGUI_