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touch.c
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touch.c
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#include "autoconf.h"
#include "libc/types.h"
#include "libtft.h"
#include "libspi.h"
#include "api/libtouch.h"
#include "libc/stdio.h"
#include "libc/nostd.h"
#include "libc/string.h"
#include "libc/regutils.h"
#include "libc/syscall.h"
#include "generated/ad7843.h"
/*
* This lib requires:
* BUS permission
* DMA permission
* TIMER permission
*/
static const char name[6] = "touch";
int touch_is_touched(void);
/* Variables */
static int posx, posy;
int devdesc_touch;
/***********************************************
* SDIO block startup function
***********************************************/
static void power_up(void)
{
}
/*****************************************
* IRQ Handlers
*
* prototype for irq handlers is:
* static void my_irq_handler(uint8_t irq, // IRQ number
* uint32_t sr // content of posthook.status,
* uint32_t dr // content of posthook.data)
*
*****************************************/
/*****************************************
* Initialization functions
*****************************************/
void EXTI15_10_IRQHandler(uint8_t irq __attribute__ ((unused)),
uint32_t status __attribute__ ((unused)),
uint32_t data __attribute__ ((unused)));
static volatile uint8_t is_touched=0;
static device_t dev;
uint8_t touch_early_init(void)
{
uint8_t ret = 0;
memset((void*)&dev, 0, sizeof(device_t));
is_touched=0;
/*******************************
* first, SDIO device declaration
*******************************/
/*
* declare the SDIO device, during initialization phase
* This function create a device_t, fullfill it, and execute a
* sys_init(INIT_DEVACCESS) syscall.
*/
memcpy(dev.name, name, strlen(name));
dev.gpio_num = 3;
/* DECLARE Touch NSS GPIO_PD10 */
dev.gpios[2].mask =
GPIO_MASK_SET_MODE | GPIO_MASK_SET_PUPD | GPIO_MASK_SET_TYPE |
GPIO_MASK_SET_SPEED;
dev.gpios[2].kref.port = ad7843_dev_infos.gpios[TOUCH_BUSY].port;
dev.gpios[2].kref.pin = ad7843_dev_infos.gpios[TOUCH_BUSY].pin;
dev.gpios[2].pupd = GPIO_NOPULL;
dev.gpios[2].mode = GPIO_PIN_INPUT_MODE;
dev.gpios[2].speed = GPIO_PIN_VERY_HIGH_SPEED;
/* DECLARE Touch NSS GPIO_PD10 */
dev.gpios[0].mask =
GPIO_MASK_SET_MODE | GPIO_MASK_SET_PUPD | GPIO_MASK_SET_TYPE |
GPIO_MASK_SET_SPEED;
dev.gpios[0].kref.port = ad7843_dev_infos.gpios[TOUCH_NSS].port;
dev.gpios[0].kref.pin = ad7843_dev_infos.gpios[TOUCH_NSS].pin;
dev.gpios[0].mode = GPIO_PIN_OUTPUT_MODE;
dev.gpios[0].pupd = GPIO_PULLUP;
dev.gpios[0].type = GPIO_PIN_OTYPER_PP;
dev.gpios[0].speed = GPIO_PIN_VERY_HIGH_SPEED;
//Then configure pin PD12 (the EXTI pin)
dev.gpios[1].mask = GPIO_MASK_SET_PUPD | GPIO_MASK_SET_TYPE | GPIO_MASK_SET_SPEED |
//GPIO_MASK_SET_MODE | GPIO_MASK_SET_PUPD | GPIO_MASK_SET_EXTI;
GPIO_MASK_SET_MODE | GPIO_MASK_SET_PUPD | GPIO_MASK_SET_EXTI;
dev.gpios[1].type = GPIO_PIN_OTYPER_OD;
dev.gpios[1].speed = GPIO_PIN_HIGH_SPEED;
dev.gpios[1].kref.port = ad7843_dev_infos.gpios[TOUCH_EXTI].port;
dev.gpios[1].kref.pin = ad7843_dev_infos.gpios[TOUCH_EXTI].pin;
dev.gpios[1].mode = GPIO_PIN_INPUT_MODE;
dev.gpios[1].pupd = GPIO_NOPULL;
dev.gpios[1].exti_trigger = GPIO_EXTI_TRIGGER_BOTH;
dev.gpios[1].exti_handler = EXTI15_10_IRQHandler;
dev.gpios[1].exti_lock = GPIO_EXTI_LOCKED;
ret = sys_init(INIT_DEVACCESS, &dev, &devdesc_touch);
return ret;
}
/*
*for penirq being serviced correctly we need a first correct SP%I communication
* So we do it after SPI is init and SPI is init after TOUCH_NSS is UP!
*/
uint8_t touch_init(void)
{
/*FIXME: Check that SPI is clocked */
lock_bus(2);
DOWN_TOUCH_NSS;
#if defined (CONFIG_WOOKEY_V1) || defined(CONFIG_WOOKEY_EMMC)
spi1_master_send_byte_sync(S_BIT | A2_BIT | A0_BIT); //VREF_ON
spi1_master_send_byte_sync( A1_BIT); //Scratch
spi1_master_send_byte_sync( A2_BIT | A1_BIT); //Scratch
spi1_master_send_byte_sync( A2_BIT | A0_BIT);
#elif defined(CONFIG_WOOKEY_V2) || defined(CONFIG_WOOKEY_V3)
spi2_master_send_byte_sync(S_BIT | A2_BIT | A0_BIT); //VREF_ON
spi2_master_send_byte_sync( A1_BIT); //Scratch
spi2_master_send_byte_sync( A2_BIT | A1_BIT); //Scratch
spi2_master_send_byte_sync( A2_BIT | A0_BIT);
#else
#error "unsupported board"
#endif
UP_TOUCH_NSS;
unlock_bus();
return 0;
}
/* Miscelleanous function for send commands and receiveing datas */
int touch_read_12bits(uint8_t command)
{
volatile int res;
volatile uint8_t tmpres;
uint8_t br = 3;
#if CONFIG_WOOKEY_V1 || CONFIG_WOOKEY_EMMC
spi1_disable();
br = spi1_get_baudrate();
spi1_set_baudrate(SPI_BAUDRATE_750KHZ);
spi1_enable();
/*DOWN the touch CS line */
DOWN_TOUCH_NSS;
/* send the command */
res = spi1_master_send_byte_sync( S_BIT | command); //S_BIT for control
tmpres = spi1_master_send_byte_sync( 0); //dont care
res = ((tmpres & 0x7f) << 5);
tmpres = spi1_master_send_byte_sync( 0); //dont care
res |= (tmpres >> 3);
UP_TOUCH_NSS;
spi1_disable();
spi1_set_baudrate(br);
spi1_enable();
#elif defined(CONFIG_WOOKEY_V2) || defined(CONFIG_WOOKEY_V3)
spi2_disable();
br = spi2_get_baudrate();
spi2_set_baudrate(SPI_BAUDRATE_750KHZ);
spi2_enable();
/*DOWN the touch CS line */
DOWN_TOUCH_NSS;
/* send the command */
res = spi2_master_send_byte_sync( S_BIT | command); //S_BIT for control
/* Wait Busy Line to got down*/
tmpres = spi2_master_send_byte_sync( 0); //dont care
res = ((tmpres & 0x7f) << 5);
tmpres = spi2_master_send_byte_sync( 0); //dont care
res |= (tmpres >> 3);
UP_TOUCH_NSS;
spi2_disable();
spi2_set_baudrate(br);
spi2_enable();
#endif
return res;
}
int touch_read_X_SER()
{
int tmp = 0;
int i;
for (i = 0; (i < 64) && touch_is_touched(); i++) {
tmp+=touch_read_12bits(A0_BIT|SER_BIT|PD1_BIT);
}
return ( i ? (tmp / i) : 0 );
}
int touch_read_Y_SER()
{
int tmp = 0;
int i;
for (i = 0; (i < 64) && touch_is_touched() ; i++) {
tmp += touch_read_12bits(A2_BIT | SER_BIT | PD1_BIT);
}
return ( i ? (tmp / i) : 0 );
}
int touch_read_X_DFR()
{
int tmp = 0;
int i;
for (i = 0; (i < 16) && touch_is_touched(); i++) {
tmp += touch_read_12bits(S_BIT | A0_BIT | PD1_BIT);
}
return ( i ? ((tmp / i) - 200) : 0 );
}
int touch_read_Y_DFR()
{
int tmp = 0;
int i;
for (i = 0; (i < 16) && touch_is_touched() ; i++) {
tmp += touch_read_12bits(S_BIT | A2_BIT | A0_BIT | PD1_BIT);
}
return ( i ? ((tmp / i) - 200) : 0 );
}
void touch_reactivate_PENIRQ()
{
touch_read_12bits(S_BIT | A2_BIT | A0_BIT | PD1_BIT);
}
void EXTI15_10_IRQHandler(uint8_t irq __attribute__ ((unused)),
uint32_t status __attribute__ ((unused)),
uint32_t data __attribute__ ((unused)) )
{
uint8_t tmp;
sys_cfg(CFG_GPIO_GET, (uint8_t) (
(ad7843_dev_infos.gpios[TOUCH_EXTI].port<<4)+
ad7843_dev_infos.gpios[TOUCH_EXTI].pin), &tmp);
is_touched=!tmp;
return;
}
/*
* WARNING!!!!!! INVERTED X AND Y SIZE HERE!
*/
int touch_getx()
{
return (posx < 3400) ? 320 * (3400 - posx) / 3400 : 0;
}
int touch_gety()
{
return (posy < 3400) ? 240 * (3400 - posy) / 3400 : 0;
}
void touch_enable_exti()
{
sys_cfg(CFG_GPIO_UNLOCK_EXTI, (uint8_t)dev.gpios[1].kref.val);
}
int touch_is_touched()
{
uint8_t tmp=1;
sys_cfg(CFG_GPIO_GET, (uint8_t) (
(ad7843_dev_infos.gpios[TOUCH_EXTI].port<<4)+
ad7843_dev_infos.gpios[TOUCH_EXTI].pin), &tmp);
return !tmp;
}
void touch_refresh_pos()
{
#if TOUCH_DEBUG
printf("Positions lue DFR %x %x \n",touch_read_X_DFR(),touch_read_Y_DFR());
#endif
/*printf("Positions lue DFR %x %x SER %x %x\n",touch_read_X_DFR(),touch_read_Y_DFR(),
touch_read_X_SER(),touch_read_Y_SER());
*/
posx = touch_read_X_DFR();
posy = touch_read_Y_DFR();
}