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Touch recognition working

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This commit is contained in:
id101010
2015-06-01 01:30:51 +02:00
parent 7d2d1a13e4
commit dff2e76cab
2 changed files with 29 additions and 31 deletions
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59
discovery/src/ll_touch.c
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@@ -129,8 +129,8 @@ bool ll_touch_init()
/* fill gpio init struct and init gpio */
GPIO_StructInit(&GPIO_SPI2_InitStructure);
GPIO_SPI2_InitStructure.GPIO_Pin = GPIO_Pin_9; // 9 = SPI2_CS
GPIO_SPI2_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_SPI2_InitStructure.GPIO_Pin = GPIO_Pin_9; // 9 = SPI2_CS
GPIO_SPI2_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_SPI2_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_SPI2_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_SPI2_InitStructure);
@@ -186,7 +186,7 @@ static void init_exti()
EXTI_StructInit(&exti);
exti.EXTI_Line = EXTI_Line0;
exti.EXTI_Mode = EXTI_Mode_Interrupt;
exti.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
exti.EXTI_Trigger = EXTI_Trigger_Falling; // Trigger on falling edge (PENIRQ)
exti.EXTI_LineCmd = ENABLE;
EXTI_Init(&exti);
@@ -207,8 +207,8 @@ static void init_timer()
/* Timer 7 configuration */
TIM_TimeBaseStructInit(&t); // Init TimeBaseStruct
t.TIM_Prescaler = APB1_CLK / 1000 - 1; // 0..41999 prescaler
t.TIM_Period = 20- 1; // 10ms cycle time
t.TIM_Prescaler = APB1_CLK / 1000 - 1; // 41999 prescaler
t.TIM_Period = 50 - 1; // 50ms count time
TIM_TimeBaseInit(TIM7, &t); // Init TIM7
TIM_ITConfig(TIM7, TIM_IT_Update, ENABLE); // Enable update IRQ for TIM7
NVIC_EnableIRQ(TIM7_IRQn); // Enable IRQs for TIM7
@@ -217,35 +217,34 @@ static void init_timer()
/* Interrupt service routines ------------------------------------------ */
void EXTI0_IRQHandler()
{
if (EXTI_GetITStatus(EXTI_Line0) == SET) { // Make sure the interrupt flag is set
if(!pen_state){ // Check if PENDOWN or PENUP
TIM_Cmd(TIM7, ENABLE); // Start the timer
while(!tim_flag); // Wait for the sampling to finish
touch_add_raw_event(avg_vals(x_samples, NSAMPLE), avg_vals(y_samples, NSAMPLE), TOUCH_DOWN);
}else{
TIM_Cmd(TIM7, ENABLE); // Start the timer
while(!tim_flag); // Wait for the sampling to finish
touch_add_raw_event(avg_vals(x_samples, NSAMPLE), avg_vals(y_samples, NSAMPLE), TOUCH_UP);
}
pen_state = !pen_state; // Toggle penstate
tim_flag = false; // Clear timer flag
if (EXTI_GetITStatus(EXTI_Line0) == SET) { // If the right interrupt flag is set
TIM_Cmd(TIM7, ENABLE); // Start the timer
EXTI_ClearITPendingBit(EXTI_Line0); // Clear interrupt flag
}
}
void TIM7_IRQHandler()
{
if(TIM_GetFlagStatus(TIM7, TIM_IT_Update) == SET){ // Make sure the interrupt flag is set
for(i = 0; i < (NSAMPLE-1); i++){
/* get x and y coordinate and apply calibration */
x_samples[i] = (((long)(DWIDTH-2*CCENTER)*2*(long)((long)touch_get_x_coord()-x1)/dx+1)>>1)+CCENTER;
y_samples[i] = (((long)(DHEIGHT-2*CCENTER)*2*(long)((long)touch_get_y_coord()-y1)/dy+1)>>1)+CCENTER;
}
tim_flag = true; // Set the global timer flag
TIM_Cmd(TIM7, DISABLE); // Count only once
}
if(TIM_GetFlagStatus(TIM7, TIM_IT_Update) == SET){ // Make sure the interrupt flag is set
TIM_Cmd(TIM7, DISABLE); // Disable the timer during the measuring
if(!GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0)){ // Only do this if the PENIRQ line is still low
/* Sample 16 times and submit */
for(i = 0; i < (NSAMPLE-1); i++){
/* Apply some calibration to the measured positions */
x_samples[i] = (((long)(DWIDTH - 2 * CCENTER) * 2 * (long)((long)touch_get_x_coord() - x1) / dx + 1) >> 1) + CCENTER;
y_samples[i] = (((long)(DHEIGHT -2 * CCENTER) * 2 * (long)((long)touch_get_y_coord() - y1) / dy + 1) >> 1) + CCENTER;
}
touch_add_raw_event(avg_vals(x_samples, NSAMPLE), avg_vals(y_samples, NSAMPLE), TOUCH_DOWN);
TIM_Cmd(TIM7, ENABLE);
} else {
touch_add_raw_event(avg_vals(x_samples, NSAMPLE), avg_vals(y_samples, NSAMPLE), TOUCH_UP);
TIM_Cmd(TIM7, DISABLE);
}
TIM_ClearFlag(TIM7, TIM_IT_Update);
}
}