一、感受
蛋疼的一天,真感觉自己的废了。好多天没有操作硬件了,上来感觉手非常生疏。并且遇到了一个小问题一直迟迟没有解决。
1、学习过程中遇到的问题总结
a、显示屏就是不能进入触摸中断。后来发现如下的设置出现了问题。这个小细节让我扣吃半天,由于这个设置始终不能进入触摸中断。
void touchscreen_int_down(void)
{
ADCTSC = UD_SEN_DOWN| YM_SEN_ENABLE | YP_SEN_DISABLE | XM_SEN_DISABLE | XP_SEN_DISABLE | PULLUP_ENABLE | AUTO_PST_AUTO| XY_PST_WAITING;
}
2、代码源码如下,这是已经调试好的了
主要就是用stylus 按下则输出down 松开串口输出up
#include "../s3c2440_soc.h" #define UD_SEN_DOWN (0<<8) #define UD_SEN_UP (1<<8) #define YM_SEN_DISABLE (0<<7) #define YM_SEN_ENABLE (1<<7) #define YP_SEN_ENABLE (0<<6) #define YP_SEN_DISABLE (1<<6) #define XM_SEN_DISABLE (0<<5) #define XM_SEN_ENABLE (1<<5) #define XP_SEN_ENABLE (0<<4) #define XP_SEN_DISABLE (1<<4) #define PULLUP_ENABLE (0<<3) #define PULLUP_DISABLE (1<<3) #define AUTO_PST_AUTO (1<<2) #define XY_PST_NO_OPERATION (0) #define XY_PST_X_MEASURE (1) #define XY_PST_Y_MEASURE (2) #define XY_PST_WAITING (3) void touchscreen_int_up(void) { ADCTSC = UD_SEN_UP| YM_SEN_ENABLE | YP_SEN_DISABLE | XM_SEN_DISABLE | XP_SEN_DISABLE | PULLUP_ENABLE | XY_PST_WAITING; } void touchscreen_int_down(void) { ADCTSC = UD_SEN_DOWN| YM_SEN_ENABLE | YP_SEN_DISABLE | XM_SEN_DISABLE | XP_SEN_DISABLE | PULLUP_ENABLE | AUTO_PST_AUTO| XY_PST_WAITING; } void AdcTsIntHandle(int irq) { /*读状态位判断处理*/ if(SUBSRCPND & (1 << 9)) { //printf("ADCUPDN = 0x%x\n\r",ADCUPDN); if(ADCUPDN & (1<<0)) { /*触摸屏按下*/ printf("down ADCUPDN = 0x%x\n\r", ADCUPDN); ADCUPDN &= ~(1<<0); touchscreen_int_up(); } if(ADCUPDN & (1<<1)) { /*触摸屏松开*/ printf("up ADCUPDN = 0x%x\n\r", ADCUPDN); ADCUPDN &= ~(1<<1); touchscreen_int_down(); } } if(SUBSRCPND & (1 << 10)) { printf("ADC irq %x\n\r"); } /*清除中断标志位*/ SRCPND = 1 << 31; INTPND = 1 << 31; SUBSRCPND |= (1<<9) | (1<<10); } void touchscreen_initw(void) { /*触摸屏控制设置*/ ADCCON = (1<<14) | (49<<6) | (0<<3); //ADCTSC = UD_SEN_DOWN| YM_SEN_ENABLE | YP_SEN_DISABLE | XM_SEN_DISABLE | XP_SEN_DISABLE | PULLUP_ENABLE | AUTO_PST_AUTO | XY_PST_WAITING; ADCDLY = 0xfff; /*中断设置*/ //INTMOD &= ~(1<<31);/*设置ADC为irq中断模式*/ //INTMSK &= ~(1<<31);/*使能ADC中断*/ SUBSRCPND = (1<<9) | (1<<10); SRCPND = (1<<31) | (1<<25); INTPND = (1<<31) | (1<<25); register_irq(31,AdcTsIntHandle); INTSUBMSK &= ~((1<<9) | (1<<10));/*使能touchscreen中断*/ touchscreen_int_down(); printf("touchscreen_init\n"); printf("INTSUBMSK = 0x%x,INTMSK = 0x%x,SUBSRCPND =0x%x,SRCPND = 0x%x,INTPND = 0x%x\n\r",INTSUBMSK,INTMSK,SUBSRCPND,SRCPND,INTPND); }