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gex-core/units/touch/_touch_core.c

111 lines
2.6 KiB

//
// Created by MightyPork on 2018/02/25.
//
#include "platform.h"
#include "unit_base.h"
#include "unit_touch.h"
#define TOUCH_INTERNAL
#include "_touch_internal.h"
#define DIS_TIME 1
static void startNextPhase(struct priv *priv);
void UTOUCH_HandleIrq(void *arg)
{
Unit *unit = arg;
struct priv *priv = unit->data;
if (TSC->ISR & TSC_ISR_MCEF) {
priv->status = UTSC_STATUS_FAIL;
dbg_touch("TSC Failure.");
TSC->ICR = TSC_ICR_EOAIC | TSC_ICR_MCEIC;
}
if (TSC->ISR & TSC_ISR_EOAF) {
TSC->ICR = TSC_ICR_EOAIC;
// assert_param((TSC->IOGCSR>>16) == priv->groups_phase[priv->next_phase]);
// Store captured data
const uint32_t chmask = priv->channels_phase[priv->next_phase];
for (int i = 0; i < 32; i++) {
if (chmask & (1<<i)) {
priv->readouts[i] = (uint16_t) (TSC->IOGXCR[i >> 2] & 0x3FFF);
}
}
priv->next_phase++;
// check if we've run out of existing or populated groups
if (priv->next_phase == 3 || priv->groups_phase[priv->next_phase] == 0) {
priv->next_phase = 0;
priv->status = UTSC_STATUS_READY;
// we'll stay in READY after the first loop until an error occurs or it's re-inited
}
TSC->CR &= ~TSC_CR_IODEF; // pull low - discharge
}
priv->ongoing = false;
priv->discharge_delay = DIS_TIME;
}
#if TSC_DEBUG
static volatile uint32_t xcnt=0;
#endif
void UTOUCH_updateTick(Unit *unit)
{
#if TSC_DEBUG
xcnt++;
#endif
struct priv *priv = unit->data;
if (priv->ongoing) {
return;
}
if (priv->discharge_delay > 0) {
priv->discharge_delay--;
} else {
startNextPhase(priv);
}
#if TSC_DEBUG
if(xcnt >= 250) {
xcnt=0;
PRINTF("> ");
for (int i = 0; i < 32; i++) {
if (priv->all_channels_mask & (1<<i)) {
PRINTF("%d ", (int)priv->readouts[i]);
}
}
PRINTF("\r\n");
}
#endif
}
static void startNextPhase(struct priv *priv)
{
if (priv->next_phase == 0 && priv->groups_phase[0] == 0) {
// no groups are configured
return;
}
TSC->IOGCSR = priv->groups_phase[priv->next_phase];
TSC->IOCCR = priv->channels_phase[priv->next_phase];
TSC->ICR = TSC_ICR_EOAIC | TSC_ICR_MCEIC;
if (priv->cfg.interlaced) {
TSC->CR |= TSC_CR_IODEF;
// floaty (must be used for interlaced pads)
// note: interlaced pads also need to be sampled individually
}
// Go!
priv->ongoing = true;
TSC->CR |= TSC_CR_START;
}