476 lines
11 KiB
C
476 lines
11 KiB
C
#include "includes.h"
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// 触摸初始化（含引脚配置）
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void XPT2046_Init(void)
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{
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gpio_init_type gpio_init_struct;
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/* 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 */
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gpio_default_para_init(&gpio_init_struct);
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/* 使能用到的 GPIO 时钟 */
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crm_periph_clock_enable(CRM_GPIOC_PERIPH_CLOCK, TRUE);
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crm_periph_clock_enable(CRM_GPIOA_PERIPH_CLOCK, TRUE);
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// 输出引脚：CLK、DIN、CS（推挽输出）
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gpio_init_struct.gpio_mode = GPIO_MODE_OUTPUT;
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gpio_init_struct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
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gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
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gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
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gpio_init_struct.gpio_pins = TP_CLK_PIN | TP_DIN_PIN | TP_CS_PIN;
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gpio_init(GPIOC, &gpio_init_struct);
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// DOUT：浮空输入（内部上拉易把空闲读成满量程）
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gpio_init_struct.gpio_mode = GPIO_MODE_INPUT;
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gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
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gpio_init_struct.gpio_pins = TP_OUT_PIN;
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gpio_init(TP_OUT_PORT, &gpio_init_struct);
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gpio_init_struct.gpio_pins = TP_IRQ_PIN;
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gpio_init_struct.gpio_pull = GPIO_PULL_UP;
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gpio_init(TP_IRQ_PORT, &gpio_init_struct);
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// 初始状态
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TP_CS_Set();
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TP_CLK_Set();
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}
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// 配置IRQ中断（可选，用于触摸触发）
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void XPT2046_IRQ_Init(void)
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{
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// GPIO_InitTypeDef GPIO_InitStruct = {0};
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// EXTI_HandleTypeDef EXTI_HandleStruct = {0};
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// // 复用IRQ引脚为外部中断
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// GPIO_InitStruct.Pin = TP_IRQ_PIN;
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// GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING; // 下降沿触发（触摸时IRQ变低）
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// GPIO_InitStruct.Pull = GPIO_PULLUP;
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// HAL_GPIO_Init(TP_IRQ_PORT, &GPIO_InitStruct);
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// // 配置EXTI中断线（PC12对应EXTI12）
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// EXTI_HandleStruct.Line = EXTI_LINE_12;
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// EXTI_HandleStruct.Mode = EXTI_MODE_INTERRUPT;
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// EXTI_HandleStruct.Pull = EXTI_PULLUP;
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// HAL_EXTI_Init(&EXTI_HandleStruct);
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// // 使能中断并设置优先级
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// HAL_NVIC_SetPriority(EXTI15_10_IRQn, 2, 0); // EXTI12属于EXTI15_10中断线
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// HAL_NVIC_EnableIRQ(EXTI15_10_IRQn);
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}
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//SPI写数据
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//向XPT2046写入1字节命令（MCU→DIN输出，XPT2046→DIN输入）
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//num:要写入的数据
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void TP_Write_Byte(uint8_t data)
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{
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uint8_t i;
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TP_CLK_Clr(); // 时钟拉低，准备发送数据
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Delay_us(1);
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for (i = 0; i < 8; i++)
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{
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// MCU通过DIN输出数据位（高位先传），XPT2046通过自身DIN输入接收
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if (data & 0x80)
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{
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TP_DIN_Set(); // DIN输出高
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}
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else
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{
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TP_DIN_Clr(); // DIN输出低
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}
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data <<= 1; // 左移，准备下一位
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// 时钟上升沿：XPT2046采样DIN引脚的输入数据（匹配XPT2046时序）
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TP_CLK_Set();
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Delay_us(1);
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TP_CLK_Clr();
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Delay_us(1);
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}
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}
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//SPI读数据
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//从触摸屏IC读取adc值
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//CMD:指令
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//返回值:读到的数据
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/* 在 CS 已拉低时写命令并读：与量产一致，16 时钟取高 12bit */
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static uint16_t TP_Read_AD_CSHeld(uint8_t cmd)
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{
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uint8_t i;
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uint16_t adc_val = 0;
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TP_Write_Byte(cmd);
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Delay_us(6);
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for (i = 0; i < 16; i++)
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{
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adc_val <<= 1;
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TP_CLK_Set();
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Delay_us(1);
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TP_CLK_Clr();
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Delay_us(1);
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if (TP_OUT_Read())
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adc_val |= 0x01;
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}
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return (uint16_t)(adc_val >> 4);
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}
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uint16_t TP_Read_AD(uint8_t cmd)
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{
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uint16_t v;
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TP_CS_Clr();
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Delay_us(2);
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v = TP_Read_AD_CSHeld(cmd);
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TP_CS_Set();
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return v;
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}
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#define TP_ADC_PRESS_MIN 120u
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#define TP_ADC_PRESS_MAX 4095u
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#define TP_PRESSURE_MIN 80u
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/* 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） */
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#define TP_PRESSURE_MAX 5000u
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static uint16_t TP_Median5(uint16_t *a)
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{
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uint8_t i, j;
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uint16_t t;
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for (i = 0; i < 4; i++) {
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for (j = (uint8_t)(i + 1U); j < 5U; j++) {
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if (a[j] < a[i]) {
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t = a[i];
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a[i] = a[j];
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a[j] = t;
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}
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}
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}
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return a[2];
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}
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static void TP_SampleXY(uint16_t *out_x, uint16_t *out_y)
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{
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uint16_t xs[5], ys[5];
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uint8_t i;
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for (i = 0; i < 5; i++) {
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xs[i] = TP_Read_AD(XPT2046_READ_X);
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Delay_us(15);
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ys[i] = TP_Read_AD(XPT2046_READ_Y);
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Delay_us(15);
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}
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*out_x = TP_Median5(xs);
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*out_y = TP_Median5(ys);
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}
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static uint16_t TP_ReadPressure(void)
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{
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uint16_t z1, z2;
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z1 = TP_Read_AD(XPT2046_READ_Z1);
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Delay_us(15);
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z2 = TP_Read_AD(XPT2046_READ_Z2);
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return (z1 > z2) ? (uint16_t)(z1 - z2) : 0U;
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}
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static uint8_t TP_AdcCoordValid(uint16_t x, uint16_t y)
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{
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/* 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） */
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if (x < TP_ADC_PRESS_MIN && y < TP_ADC_PRESS_MIN)
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return 0U;
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if (x > 4000u && y > 4000u)
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return 0U;
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return (x <= TP_ADC_PRESS_MAX && y <= TP_ADC_PRESS_MAX) ? 1U : 0U;
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}
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#define CALIB_X_MIN 200
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#define CALIB_X_MAX 3800
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#define CALIB_Y_MIN 200
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#define CALIB_Y_MAX 3950
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/*
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* 竖屏线性映射：raw.x→屏幕X，raw.y→屏幕Y。
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* 本机 X 轴左右对调（点右触发左），开 TP_MIRROR_X。
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* 若 TP_MIRROR_Y=1 会导致 Y 轴反转（点「专业」误中「万能」）。
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* DOUT(PA15) 浮空输入；空闲 raw.y 噪声禁止走 ADC 回退。
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*/
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#define TP_SWAP_XY 0
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#define TP_MIRROR_X 1
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#define TP_MIRROR_Y 0
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static uint16_t TP_MapAxis(uint16_t adc, uint16_t adc_min, uint16_t adc_max, uint16_t px_max)
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{
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int32_t v = (int32_t)adc;
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int32_t a0 = (int32_t)adc_min;
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int32_t a1 = (int32_t)adc_max;
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int32_t span = a1 - a0;
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int32_t px;
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if (span <= 0)
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return 0;
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if (v < a0)
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v = a0;
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if (v > a1)
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v = a1;
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px = (v - a0) * (int32_t)px_max / span;
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if (px < 0)
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px = 0;
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if (px > (int32_t)px_max)
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px = (int32_t)px_max;
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return (uint16_t)px;
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}
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static void TP_RawToScreen(uint16_t raw_x, uint16_t raw_y, uint16_t *sx, uint16_t *sy)
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{
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uint16_t ax, ay;
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#if TP_SWAP_XY
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ax = TP_MapAxis(raw_y, CALIB_Y_MIN, CALIB_Y_MAX, (uint16_t)(LCD_W - 1));
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ay = TP_MapAxis(raw_x, CALIB_X_MIN, CALIB_X_MAX, (uint16_t)(LCD_H - 1));
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#else
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ax = TP_MapAxis(raw_x, CALIB_X_MIN, CALIB_X_MAX, (uint16_t)(LCD_W - 1));
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ay = TP_MapAxis(raw_y, CALIB_Y_MIN, CALIB_Y_MAX, (uint16_t)(LCD_H - 1));
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#endif
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#if TP_MIRROR_X
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ax = (uint16_t)(LCD_W - 1 - ax);
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#endif
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#if TP_MIRROR_Y
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ay = (uint16_t)(LCD_H - 1 - ay);
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#endif
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*sx = ax;
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*sy = ay;
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}
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void TP_LogStatus(void)
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{
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uint16_t x, y, z;
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uint16_t sx, sy;
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z = TP_ReadPressure();
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TP_SampleXY(&x, &y);
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TP_RawToScreen(x, y, &sx, &sy);
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LOG_TPI("status irq=%u z=%u raw=%u,%u cal=%u,%u",
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(unsigned)(TP_IRQ_Read() == 0U),
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(unsigned)z,
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(unsigned)x, (unsigned)y,
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(unsigned)sx, (unsigned)sy);
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}
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static uint8_t s_tp_live;
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void TP_SetLiveMode(uint8_t on)
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{
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s_tp_live = on ? 1U : 0U;
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LOG_TPI("live %s (events only)", s_tp_live ? "on" : "off");
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}
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/* 不再空闲刷屏；按下事件仍由 touch task 的 scan/press/release 打印 */
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void TP_LivePoll(void)
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{
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(void)s_tp_live;
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}
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uint8_t TP_CheckPressed(uint8_t n)
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{
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uint8_t count = 0;
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uint8_t i;
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for (i = 0; i < n; i++)
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{
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if (TP_IRQ_Read() == 0)
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count++;
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Delay_us(100);
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}
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return (count >= ((n + 1U) / 2U)) ? 1U : 0U;
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}
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TP_Point TP_ReadRaw(void)
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{
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TP_Point p = {0, 0, 0};
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uint8_t irq_pressed;
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static uint8_t s_raw_logged;
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uint16_t rx, ry;
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irq_pressed = TP_CheckPressed(3);
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if (!irq_pressed) {
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/*
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* 空闲时 ADC 常读成 y=4095，会误触发幽灵点击。
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* 本板真触摸 IRQ 能拉低，只认 IRQ 路径。
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*/
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s_raw_logged = 0U;
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return p;
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}
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TP_SampleXY(&rx, &ry);
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if (!TP_AdcCoordValid(rx, ry)) {
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s_raw_logged = 0U;
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return p;
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}
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p.x = rx;
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p.y = ry;
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p.pressed = 1;
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if (!s_raw_logged) {
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LOG_TPI("raw x=%u y=%u irq=1", (unsigned)p.x, (unsigned)p.y);
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s_raw_logged = 1U;
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}
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return p;
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}
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TP_Point TP_Read(void)
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{
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TP_Point raw = TP_ReadRaw();
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TP_Point calib = {0, 0, raw.pressed};
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static uint8_t s_cal_logged;
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if (!raw.pressed) {
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s_cal_logged = 0U;
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return calib;
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}
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TP_RawToScreen(raw.x, raw.y, &calib.x, &calib.y);
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if (!s_cal_logged) {
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LOG_TPI("cal x=%u y=%u (raw %u,%u)", (unsigned)calib.x, (unsigned)calib.y,
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(unsigned)raw.x, (unsigned)raw.y);
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s_cal_logged = 1U;
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}
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return calib;
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}
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// EXTI15_10中断服务函数（处理TP_IRQ触发）
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//void EXTI15_10_IRQHandler(void)
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//{
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// HAL_EXTI_IRQHandler(&EXTI_HandleStruct); // 调用HAL库中断处理
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//}
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// 中断回调函数（触摸触发时执行）
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//void HAL_EXTI_Callback(EXTI_HandleTypeDef *hexti)
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//{
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// if (hexti->Line == EXTI_LINE_12)
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// {
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// TP_Point p = TP_Read(); // 读取触摸坐标
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// if (p.pressed)
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// {
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// // 处理触摸事件（如绘图、按键响应等）
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// // LCD_DrawPixel(p.x, p.y, 0xF800); // 示例：画红点
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// }
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// }
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//}
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//////////////////////////////////////////////////////////////////////////////////
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//与LCD部分有关的函数
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//画一个触摸点
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//用来校准用的
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//x,y:坐标
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//color:颜色
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void TP_Drow_Touch_Point(uint16_t x, uint16_t y, uint16_t color)
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{
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LCD_DrawLine(x - 12, y, x + 13, y, color);//横线
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LCD_DrawLine(x, y - 12, x, y + 13, color);//竖线
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LCD_DrawPoint(x + 1, y + 1, color);
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LCD_DrawPoint(x - 1, y + 1, color);
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LCD_DrawPoint(x + 1, y - 1, color);
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LCD_DrawPoint(x - 1, y - 1, color);
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LCD_DrawCircle(x, y, 6, color);//画中心圈
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}
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//画一个大点(2*2的点)
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//x,y:坐标
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//color:颜色
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void TP_Draw_Big_Point(uint16_t x, uint16_t y, uint16_t color)
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{
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LCD_DrawPoint(x, y, color);//中心点
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LCD_DrawPoint(x + 1, y, color);
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LCD_DrawPoint(x, y + 1, color);
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LCD_DrawPoint(x + 1, y + 1, color);
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}
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/******************************************************************************
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函数说明：画线
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入口数据：x1,y1 起始坐标
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x2,y2 终止坐标
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color 线的颜色
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返回值： 无
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******************************************************************************/
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void LCD_DrawRoughLine(uint16_t x1,uint16_t y1,uint16_t x2,uint16_t y2,uint16_t color)
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{
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uint16_t t;
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int xerr = 0, yerr = 0, delta_x, delta_y, distance;
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int incx, incy, uRow, uCol;
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delta_x = x2 - x1; //计算坐标增量
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delta_y = y2 - y1;
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uRow = x1;//画线起点坐标
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uCol = y1;
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if(delta_x > 0)
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{
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incx = 1; //设置单步方向
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}
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else if (delta_x == 0)
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{
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incx = 0;//垂直线
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}
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else
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{
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incx = -1;
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delta_x = -delta_x;
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}
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if(delta_y > 0)
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{
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incy = 1;
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}
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else if (delta_y == 0)
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{
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incy = 0;//水平线
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}
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else
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{
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incy = -1;
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delta_y = -delta_y;
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}
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if(delta_x > delta_y)
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{
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distance = delta_x; //选取基本增量坐标轴
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}
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else
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{
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distance = delta_y;
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}
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for(t=0;t<distance+1;t++)
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{
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TP_Draw_Big_Point(uRow, uCol, color);//画点
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xerr += delta_x;
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yerr += delta_y;
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if(xerr > distance)
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{
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xerr -= distance;
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uRow += incx;
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}
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if(yerr > distance)
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{
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yerr -= distance;
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uCol += incy;
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}
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}
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}
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// 辅助函数：格式化坐标字符串（x,y转字符串）
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void TP_FormatCoord(char *buf, TP_Point p)
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{
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sprintf(buf, "X:%4d Y:%4d", p.x, p.y); // 格式化为"X:xxxx Y:yyyy"
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}
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/* ------------------------END----------------------- */
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