144 lines
4.0 KiB
C
144 lines
4.0 KiB
C
#include "stm32f10x.h"
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#include "rtthread.h"
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#include "board.h"
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#if (LCD_VERSION == 2)
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/*
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MISO PA6
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MOSI PA7
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CLK PA5
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CS PC4
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*/
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#define CS_0() GPIO_ResetBits(GPIOC,GPIO_Pin_4)
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#define CS_1() GPIO_SetBits(GPIOC,GPIO_Pin_4)
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/*
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7 6 - 4 3 2 1-0
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s A2-A0 MODE SER/DFR PD1-PD0
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*/
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#define TOUCH_MSR_Y 0x90 //读X轴坐标指令 addr:1
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#define TOUCH_MSR_X 0xD0 //读Y轴坐标指令 addr:3
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extern unsigned char SPI_WriteByte(unsigned char data);
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//SPI写数据
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static void WriteDataTo7843(unsigned char num)
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{
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SPI_WriteByte(num);
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}
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//触摸处理
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void Go_Touch(void)
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{
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unsigned int X;
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unsigned int Y;
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CS_0();
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WriteDataTo7843(TOUCH_MSR_X | 1); /* 发送读X坐标命令并关闭中断 */
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X = SPI_WriteByte(0x00)<<4; /* 读取第一字节MSB */
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X |= ((SPI_WriteByte(TOUCH_MSR_Y | 1)>>4)&0x0F );/* 读取第二字节 同时发送读Y轴坐标命令行*/
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Y = SPI_WriteByte(0x00)<<4; /* 读取第一字节MSB */
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Y |= ((SPI_WriteByte(1<<7)>>4)&0x0F ); /* 读取第二字节并重新打开中断 */
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CS_1();
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rt_kprintf("\r\nX: %04d Y: %04d",X,Y);
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}
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static void NVIC_Configuration(void)
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{
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NVIC_InitTypeDef NVIC_InitStructure;
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/* Enable the EXTI0 Interrupt */
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NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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}
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static void exti_int_config(void)
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{
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EXTI_InitTypeDef EXTI_InitStructure;
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/* PB1 touch INT */
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
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GPIO_Init(GPIOB,&GPIO_InitStructure);
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}
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GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource1);
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/* Configure EXTI */
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EXTI_InitStructure.EXTI_Line = EXTI_Line1;
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EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
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EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;//Falling下降沿 Rising上升
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EXTI_InitStructure.EXTI_LineCmd = ENABLE;
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EXTI_Init(&EXTI_InitStructure);
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EXTI_ClearITPendingBit(EXTI_Line1);
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}
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#include <finsh.h>
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void touch_test(void)
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{
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SPI_InitTypeDef SPI_InitStructure;
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rt_kprintf("\r\ntouch testing....\r\n");
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
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/* Enable SPI_MASTER */
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SPI_Cmd(SPI1, DISABLE);
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/*------------------------ SPI1 configuration ------------------------*/
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SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;//SPI_Direction_1Line_Tx;
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SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
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SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
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SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
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SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
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SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
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SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_64;/* 72M/64=1.125M */
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SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
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SPI_InitStructure.SPI_CRCPolynomial = 7;
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SPI_I2S_DeInit(SPI1);
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SPI_Init(SPI1, &SPI_InitStructure);
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/* Enable SPI_MASTER */
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SPI_Cmd(SPI1, ENABLE);
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NVIC_Configuration();
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exti_int_config();
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/* PC4 touch CS */
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
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GPIO_Init(GPIOC,&GPIO_InitStructure);
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CS_1();
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}
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CS_0();
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WriteDataTo7843( 1<<7 ); /* 打开中断 */
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CS_1();
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}
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FINSH_FUNCTION_EXPORT(touch_test, touch_test)
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void EXTI1_IRQHandler(void)
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{
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EXTI_ClearITPendingBit(EXTI_Line1);
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Go_Touch();
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}
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#endif
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