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Working PENIRQ

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This commit is contained in:
id101010
2015-05-28 17:13:55 +02:00
parent 5bda699f79
commit 9b1020c0bb
2 changed files with 62 additions and 48 deletions
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108
discovery/src/ll_touch.c
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@@ -1,7 +1,8 @@
#include"ll_touch.h"
#include<stm32f4xx_spi.h>
#include<stm32f4xx_rcc.h>
#include<stm32f4xx_exti.h>
#include<stm32f4xx_syscfg.h>
#include<tft.h>
#include<stdio.h>
#include<stdlib.h>
@@ -13,38 +14,14 @@
#define REQ_Y_COORD 0xD0 // Request y coordinate
#define REQ_1_DATAB 0x00 // Request one databyte
/* Prototypes -------------------------------------------------------- */
bool ll_touch_init();
static void init_exti();
static uint8_t touch_send(uint8_t dat);
static uint16_t touch_get_y_coord();
static uint16_t touch_get_y_coord();
void touch_test();
/*
void touch_test()
{
tft_clear(BLACK);
//test
CLEAR_CS;
touch_send(0xD0);
uint16_t buf = ((uint16_t) touch_send(0x00))<<5;
buf|= touch_send(0x00) >> 3;
int test = 3;
SET_CS;
char b[10];
itoa(buf, b, 10);
tft_print_line(10,10,WHITE,TRANSPARENT,0,(const char*)b);
tft_print_formatted(10,50,WHITE,TRANSPARENT,0,"XCoord %d", test);
}
*/
/* Functions --------------------------------------------------------- */
static uint16_t touch_get_x_coord()
{
@@ -106,29 +83,25 @@ bool ll_touch_init()
//We have a ADS7843 Touch controller
//Datasheet: http://www.ti.com/lit/ds/symlink/ads7843.pdf
// init structures
/* init structures */
SPI_InitTypeDef SPI_SPI2_InitStructure;
GPIO_InitTypeDef GPIO_SPI2_InitStructure;
// enable gpio clock
RCC_APB2PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
// enable spi clock
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
RCC_APB2PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE); // enable clock on gpiob
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE); // ebable spi clock
// fill gpio init struct and init gpio
/* fill gpio init struct and init gpio */
GPIO_StructInit(&GPIO_SPI2_InitStructure);
GPIO_SPI2_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_14 | GPIO_Pin_15; // 10 = SPI2_SCK, 14 = SPI2_MISO, 15 = SPI2_MOSI
GPIO_SPI2_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_SPI2_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_SPI2_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_SPI2_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_SPI2_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOB, &GPIO_SPI2_InitStructure);
// set chip select
SET_CS;
SET_CS; // set chip select
// fill gpio init struct and init gpio
/* 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;
@@ -136,15 +109,14 @@ bool ll_touch_init()
GPIO_SPI2_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_SPI2_InitStructure);
// init alternate functions on GPIOB
/* init alternate functions on GPIOB */
GPIO_PinAFConfig(GPIOB, GPIO_PinSource10, GPIO_AF_SPI2);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_SPI2);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_SPI2);
SPI_I2S_DeInit(SPI2); // Clear spi initialisation
// clear spi initialisation
SPI_I2S_DeInit(SPI2);
// fill spi init structure
/* fill spi init structure */
SPI_StructInit(&SPI_SPI2_InitStructure);
SPI_SPI2_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_SPI2_InitStructure.SPI_Mode = SPI_Mode_Master;
@@ -155,12 +127,54 @@ bool ll_touch_init()
SPI_SPI2_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
SPI_SPI2_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
// init spi
SPI_Init(SPI2, &SPI_SPI2_InitStructure);
// enable spi
SPI_Cmd(SPI2, ENABLE);
SPI_Init(SPI2, &SPI_SPI2_InitStructure); // init spi
SPI_Cmd(SPI2, ENABLE); // enable spi
init_exti(); // init external interrupt for penirq
return true;
}
static void init_exti()
{
/* init structures */
GPIO_InitTypeDef gpio;
EXTI_InitTypeDef exti;
NVIC_InitTypeDef nvic;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE); // enable GPIOA clock
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE); // enable SYSCFG clock
/* Set GPIOA0 as input */
gpio.GPIO_Mode = GPIO_Mode_IN;
gpio.GPIO_OType = GPIO_OType_PP;
gpio.GPIO_Pin = GPIO_Pin_0;
gpio.GPIO_PuPd = GPIO_PuPd_UP;
gpio.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_Init(GPIOA, &gpio);
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource0); // Bind Exti_line0 to PA0
/* EXTI on PA0 */
EXTI_StructInit(&exti);
exti.EXTI_Line = EXTI_Line0;
exti.EXTI_Mode = EXTI_Mode_Interrupt;
exti.EXTI_Trigger = EXTI_Trigger_Falling;
exti.EXTI_LineCmd = ENABLE;
EXTI_Init(&exti);
/* Add IRQ vector to NVIC */
nvic.NVIC_IRQChannel = EXTI0_IRQn; // PD0 -> EXTI_Line0 -> EXTI0_IRQn vector
nvic.NVIC_IRQChannelPreemptionPriority = 0x00; // Set priority
nvic.NVIC_IRQChannelSubPriority = 0x00; // Set sub priority
nvic.NVIC_IRQChannelCmd = ENABLE; // Enable interrupt
NVIC_Init(&nvic); // Config NVIC
}
/* Interrupt service routines ------------------------------------------ */
void EXTI0_IRQHandler()
{
if (EXTI_GetITStatus(EXTI_Line0) != RESET) { // Make sure the interrupt flag is set
touch_test();
EXTI_ClearITPendingBit(EXTI_Line0); // Clear interrupt flag
}
}