K1Guitar/device/LCD_ILI9341/Drv_XPT2046_Touch.c

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#include "includes.h"
// 触摸初始化(含引脚配置)
void XPT2046_Init(void)
{
gpio_init_type gpio_init_struct;
/* 必须先用默认值填充结构体,否则 out_type/drive_strength 等字段是随机值 */
gpio_default_para_init(&gpio_init_struct);
/* 使能用到的 GPIO 时钟 */
crm_periph_clock_enable(CRM_GPIOC_PERIPH_CLOCK, TRUE);
crm_periph_clock_enable(CRM_GPIOA_PERIPH_CLOCK, TRUE);
// 输出引脚CLK、DIN、CS推挽输出
gpio_init_struct.gpio_mode = GPIO_MODE_OUTPUT;
gpio_init_struct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
gpio_init_struct.gpio_pins = TP_CLK_PIN | TP_DIN_PIN | TP_CS_PIN;
gpio_init(GPIOC, &gpio_init_struct);
// DOUT浮空输入内部上拉易把空闲读成满量程
gpio_init_struct.gpio_mode = GPIO_MODE_INPUT;
gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
gpio_init_struct.gpio_pins = TP_OUT_PIN;
gpio_init(TP_OUT_PORT, &gpio_init_struct);
gpio_init_struct.gpio_pins = TP_IRQ_PIN;
gpio_init_struct.gpio_pull = GPIO_PULL_UP;
gpio_init(TP_IRQ_PORT, &gpio_init_struct);
// 初始状态
TP_CS_Set();
TP_CLK_Set();
}
// 配置IRQ中断可选用于触摸触发
void XPT2046_IRQ_Init(void)
{
// GPIO_InitTypeDef GPIO_InitStruct = {0};
// EXTI_HandleTypeDef EXTI_HandleStruct = {0};
// // 复用IRQ引脚为外部中断
// GPIO_InitStruct.Pin = TP_IRQ_PIN;
// GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING; // 下降沿触发触摸时IRQ变低
// GPIO_InitStruct.Pull = GPIO_PULLUP;
// HAL_GPIO_Init(TP_IRQ_PORT, &GPIO_InitStruct);
// // 配置EXTI中断线PC12对应EXTI12
// EXTI_HandleStruct.Line = EXTI_LINE_12;
// EXTI_HandleStruct.Mode = EXTI_MODE_INTERRUPT;
// EXTI_HandleStruct.Pull = EXTI_PULLUP;
// HAL_EXTI_Init(&EXTI_HandleStruct);
// // 使能中断并设置优先级
// HAL_NVIC_SetPriority(EXTI15_10_IRQn, 2, 0); // EXTI12属于EXTI15_10中断线
// HAL_NVIC_EnableIRQ(EXTI15_10_IRQn);
}
//SPI写数据
//向XPT2046写入1字节命令MCU→DIN输出XPT2046→DIN输入
//num:要写入的数据
void TP_Write_Byte(uint8_t data)
{
uint8_t i;
TP_CLK_Clr(); // 时钟拉低,准备发送数据
Delay_us(1);
for (i = 0; i < 8; i++)
{
// MCU通过DIN输出数据位高位先传XPT2046通过自身DIN输入接收
if (data & 0x80)
{
TP_DIN_Set(); // DIN输出高
}
else
{
TP_DIN_Clr(); // DIN输出低
}
data <<= 1; // 左移,准备下一位
// 时钟上升沿XPT2046采样DIN引脚的输入数据匹配XPT2046时序
TP_CLK_Set();
Delay_us(1);
TP_CLK_Clr();
Delay_us(1);
}
}
//SPI读数据
//从触摸屏IC读取adc值
//CMD:指令
//返回值:读到的数据
/* 在 CS 已拉低时写命令并读与量产一致16 时钟取高 12bit */
static uint16_t TP_Read_AD_CSHeld(uint8_t cmd)
{
uint8_t i;
uint16_t adc_val = 0;
TP_Write_Byte(cmd);
Delay_us(6);
for (i = 0; i < 16; i++)
{
adc_val <<= 1;
TP_CLK_Set();
Delay_us(1);
TP_CLK_Clr();
Delay_us(1);
if (TP_OUT_Read())
adc_val |= 0x01;
}
return (uint16_t)(adc_val >> 4);
}
uint16_t TP_Read_AD(uint8_t cmd)
{
uint16_t v;
TP_CS_Clr();
Delay_us(2);
v = TP_Read_AD_CSHeld(cmd);
TP_CS_Set();
return v;
}
#define TP_ADC_PRESS_MIN 120u
#define TP_ADC_PRESS_MAX 4095u
#define TP_PRESSURE_MIN 80u
/* 本板 IRQ 无效;压力仅作弱参考,不过度拦截(真触摸 z 也常偏大) */
#define TP_PRESSURE_MAX 5000u
static uint16_t TP_Median5(uint16_t *a)
{
uint8_t i, j;
uint16_t t;
for (i = 0; i < 4; i++) {
for (j = (uint8_t)(i + 1U); j < 5U; j++) {
if (a[j] < a[i]) {
t = a[i];
a[i] = a[j];
a[j] = t;
}
}
}
return a[2];
}
static void TP_SampleXY(uint16_t *out_x, uint16_t *out_y)
{
uint16_t xs[5], ys[5];
uint8_t i;
for (i = 0; i < 5; i++) {
xs[i] = TP_Read_AD(XPT2046_READ_X);
Delay_us(15);
ys[i] = TP_Read_AD(XPT2046_READ_Y);
Delay_us(15);
}
*out_x = TP_Median5(xs);
*out_y = TP_Median5(ys);
}
static uint16_t TP_ReadPressure(void)
{
uint16_t z1, z2;
z1 = TP_Read_AD(XPT2046_READ_Z1);
Delay_us(15);
z2 = TP_Read_AD(XPT2046_READ_Z2);
return (z1 > z2) ? (uint16_t)(z1 - z2) : 0U;
}
static uint8_t TP_AdcCoordValid(uint16_t x, uint16_t y)
{
/* 仅排除明显无效双高在本板上也可能是真触摸Y 常贴高,垂直靠 raw.x */
if (x < TP_ADC_PRESS_MIN && y < TP_ADC_PRESS_MIN)
return 0U;
if (x > 4000u && y > 4000u)
return 0U;
return (x <= TP_ADC_PRESS_MAX && y <= TP_ADC_PRESS_MAX) ? 1U : 0U;
}
#define CALIB_X_MIN 200
#define CALIB_X_MAX 3800
#define CALIB_Y_MIN 200
#define CALIB_Y_MAX 3950
/*
* 线raw.xXraw.yY
* X TP_MIRROR_X
* TP_MIRROR_Y=1 Y
* DOUT(PA15) raw.y ADC 退
*/
#define TP_SWAP_XY 0
#define TP_MIRROR_X 1
#define TP_MIRROR_Y 0
static uint16_t TP_MapAxis(uint16_t adc, uint16_t adc_min, uint16_t adc_max, uint16_t px_max)
{
int32_t v = (int32_t)adc;
int32_t a0 = (int32_t)adc_min;
int32_t a1 = (int32_t)adc_max;
int32_t span = a1 - a0;
int32_t px;
if (span <= 0)
return 0;
if (v < a0)
v = a0;
if (v > a1)
v = a1;
px = (v - a0) * (int32_t)px_max / span;
if (px < 0)
px = 0;
if (px > (int32_t)px_max)
px = (int32_t)px_max;
return (uint16_t)px;
}
static void TP_RawToScreen(uint16_t raw_x, uint16_t raw_y, uint16_t *sx, uint16_t *sy)
{
uint16_t ax, ay;
#if TP_SWAP_XY
ax = TP_MapAxis(raw_y, CALIB_Y_MIN, CALIB_Y_MAX, (uint16_t)(LCD_W - 1));
ay = TP_MapAxis(raw_x, CALIB_X_MIN, CALIB_X_MAX, (uint16_t)(LCD_H - 1));
#else
ax = TP_MapAxis(raw_x, CALIB_X_MIN, CALIB_X_MAX, (uint16_t)(LCD_W - 1));
ay = TP_MapAxis(raw_y, CALIB_Y_MIN, CALIB_Y_MAX, (uint16_t)(LCD_H - 1));
#endif
#if TP_MIRROR_X
ax = (uint16_t)(LCD_W - 1 - ax);
#endif
#if TP_MIRROR_Y
ay = (uint16_t)(LCD_H - 1 - ay);
#endif
*sx = ax;
*sy = ay;
}
void TP_LogStatus(void)
{
uint16_t x, y, z;
uint16_t sx, sy;
z = TP_ReadPressure();
TP_SampleXY(&x, &y);
TP_RawToScreen(x, y, &sx, &sy);
LOG_TPI("status irq=%u z=%u raw=%u,%u cal=%u,%u",
(unsigned)(TP_IRQ_Read() == 0U),
(unsigned)z,
(unsigned)x, (unsigned)y,
(unsigned)sx, (unsigned)sy);
}
static uint8_t s_tp_live;
void TP_SetLiveMode(uint8_t on)
{
s_tp_live = on ? 1U : 0U;
LOG_TPI("live %s (events only)", s_tp_live ? "on" : "off");
}
/* 不再空闲刷屏;按下事件仍由 touch task 的 scan/press/release 打印 */
void TP_LivePoll(void)
{
(void)s_tp_live;
}
uint8_t TP_CheckPressed(uint8_t n)
{
uint8_t count = 0;
uint8_t i;
for (i = 0; i < n; i++)
{
if (TP_IRQ_Read() == 0)
count++;
Delay_us(100);
}
return (count >= ((n + 1U) / 2U)) ? 1U : 0U;
}
TP_Point TP_ReadRaw(void)
{
TP_Point p = {0, 0, 0};
uint8_t irq_pressed;
static uint8_t s_raw_logged;
uint16_t rx, ry;
irq_pressed = TP_CheckPressed(3);
if (!irq_pressed) {
/*
* ADC y=4095
* IRQ IRQ
*/
s_raw_logged = 0U;
return p;
}
TP_SampleXY(&rx, &ry);
if (!TP_AdcCoordValid(rx, ry)) {
s_raw_logged = 0U;
return p;
}
p.x = rx;
p.y = ry;
p.pressed = 1;
if (!s_raw_logged) {
LOG_TPI("raw x=%u y=%u irq=1", (unsigned)p.x, (unsigned)p.y);
s_raw_logged = 1U;
}
return p;
}
TP_Point TP_Read(void)
{
TP_Point raw = TP_ReadRaw();
TP_Point calib = {0, 0, raw.pressed};
static uint8_t s_cal_logged;
if (!raw.pressed) {
s_cal_logged = 0U;
return calib;
}
TP_RawToScreen(raw.x, raw.y, &calib.x, &calib.y);
if (!s_cal_logged) {
LOG_TPI("cal x=%u y=%u (raw %u,%u)", (unsigned)calib.x, (unsigned)calib.y,
(unsigned)raw.x, (unsigned)raw.y);
s_cal_logged = 1U;
}
return calib;
}
// EXTI15_10中断服务函数处理TP_IRQ触发
//void EXTI15_10_IRQHandler(void)
//{
// HAL_EXTI_IRQHandler(&EXTI_HandleStruct); // 调用HAL库中断处理
//}
// 中断回调函数(触摸触发时执行)
//void HAL_EXTI_Callback(EXTI_HandleTypeDef *hexti)
//{
// if (hexti->Line == EXTI_LINE_12)
// {
// TP_Point p = TP_Read(); // 读取触摸坐标
// if (p.pressed)
// {
// // 处理触摸事件(如绘图、按键响应等)
// // LCD_DrawPixel(p.x, p.y, 0xF800); // 示例:画红点
// }
// }
//}
//////////////////////////////////////////////////////////////////////////////////
//与LCD部分有关的函数
//画一个触摸点
//用来校准用的
//x,y:坐标
//color:颜色
void TP_Drow_Touch_Point(uint16_t x, uint16_t y, uint16_t color)
{
LCD_DrawLine(x - 12, y, x + 13, y, color);//横线
LCD_DrawLine(x, y - 12, x, y + 13, color);//竖线
LCD_DrawPoint(x + 1, y + 1, color);
LCD_DrawPoint(x - 1, y + 1, color);
LCD_DrawPoint(x + 1, y - 1, color);
LCD_DrawPoint(x - 1, y - 1, color);
LCD_DrawCircle(x, y, 6, color);//画中心圈
}
//画一个大点(2*2的点)
//x,y:坐标
//color:颜色
void TP_Draw_Big_Point(uint16_t x, uint16_t y, uint16_t color)
{
LCD_DrawPoint(x, y, color);//中心点
LCD_DrawPoint(x + 1, y, color);
LCD_DrawPoint(x, y + 1, color);
LCD_DrawPoint(x + 1, y + 1, color);
}
/******************************************************************************
线
x1,y1
x2,y2
color 线
******************************************************************************/
void LCD_DrawRoughLine(uint16_t x1,uint16_t y1,uint16_t x2,uint16_t y2,uint16_t color)
{
uint16_t t;
int xerr = 0, yerr = 0, delta_x, delta_y, distance;
int incx, incy, uRow, uCol;
delta_x = x2 - x1; //计算坐标增量
delta_y = y2 - y1;
uRow = x1;//画线起点坐标
uCol = y1;
if(delta_x > 0)
{
incx = 1; //设置单步方向
}
else if (delta_x == 0)
{
incx = 0;//垂直线
}
else
{
incx = -1;
delta_x = -delta_x;
}
if(delta_y > 0)
{
incy = 1;
}
else if (delta_y == 0)
{
incy = 0;//水平线
}
else
{
incy = -1;
delta_y = -delta_y;
}
if(delta_x > delta_y)
{
distance = delta_x; //选取基本增量坐标轴
}
else
{
distance = delta_y;
}
for(t=0;t<distance+1;t++)
{
TP_Draw_Big_Point(uRow, uCol, color);//画点
xerr += delta_x;
yerr += delta_y;
if(xerr > distance)
{
xerr -= distance;
uRow += incx;
}
if(yerr > distance)
{
yerr -= distance;
uCol += incy;
}
}
}
// 辅助函数格式化坐标字符串x,y转字符串
void TP_FormatCoord(char *buf, TP_Point p)
{
sprintf(buf, "X:%4d Y:%4d", p.x, p.y); // 格式化为"X:xxxx Y:yyyy"
}
/* ------------------------END----------------------- */