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139 lines
3.6 KiB
139 lines
3.6 KiB
//
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// Created by MightyPork on 2018/02/03.
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//
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#include "platform.h"
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#include "unit_base.h"
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#define DIN_INTERNAL
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#include "_din_internal.h"
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/** Allocate data structure and set defaults */
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error_t DIn_preInit(Unit *unit)
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{
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struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv));
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if (priv == NULL) return E_OUT_OF_MEM;
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// some defaults
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priv->port_name = 'A';
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priv->pins = 0x0001;
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priv->pulldown = 0x0000;
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priv->pullup = 0x0000;
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priv->trig_rise = 0x0000;
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priv->trig_fall = 0x0000;
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priv->trig_holdoff = 100;
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priv->def_auto = 0x0000;
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return E_SUCCESS;
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}
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/** Finalize unit set-up */
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error_t DIn_init(Unit *unit)
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{
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bool suc = true;
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struct priv *priv = unit->data;
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priv->pulldown &= priv->pins;
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priv->pullup &= priv->pins;
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priv->trig_rise &= priv->pins;
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priv->trig_fall &= priv->pins;
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priv->def_auto &= (priv->trig_rise|priv->trig_fall);
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// copy auto-arm defaults to the auto-arm register (the register may be manipulated by commands)
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priv->arm_auto = priv->def_auto;
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priv->arm_single = 0;
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// clear countdowns
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memset(priv->holdoff_countdowns, 0, sizeof(priv->holdoff_countdowns));
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// --- Parse config ---
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priv->port = hw_port2periph(priv->port_name, &suc);
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if (!suc) return E_BAD_CONFIG;
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// Claim all needed pins
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TRY(rsc_claim_gpios(unit, priv->port_name, priv->pins));
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uint16_t mask;
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// claim the needed EXTIs
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mask = 1;
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for (int i = 0; i < 16; i++, mask <<= 1) {
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if (priv->pins & mask) {
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if ((priv->trig_rise|priv->trig_fall) & mask) {
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TRY(rsc_claim(unit, R_EXTI0+i));
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}
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}
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}
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mask = 1;
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for (int i = 0; i < 16; i++, mask <<= 1) {
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if (priv->pins & mask) {
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uint32_t ll_pin = hw_pin2ll((uint8_t) i, &suc);
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// --- Init hardware ---
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LL_GPIO_SetPinMode(priv->port, ll_pin, LL_GPIO_MODE_INPUT);
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uint32_t pull = 0;
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#if PLAT_NO_FLOATING_INPUTS
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pull = LL_GPIO_PULL_UP;
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#else
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pull = LL_GPIO_PULL_NO;
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#endif
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if (priv->pulldown & mask) pull = LL_GPIO_PULL_DOWN;
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if (priv->pullup & mask) pull = LL_GPIO_PULL_UP;
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LL_GPIO_SetPinPull(priv->port, ll_pin, pull);
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if ((priv->trig_rise|priv->trig_fall) & mask) {
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LL_EXTI_EnableIT_0_31(LL_EXTI_LINES[i]);
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if (priv->trig_rise & mask) {
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LL_EXTI_EnableRisingTrig_0_31(LL_EXTI_LINES[i]);
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}
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if (priv->trig_fall & mask) {
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LL_EXTI_EnableFallingTrig_0_31(LL_EXTI_LINES[i]);
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}
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LL_SYSCFG_SetEXTISource(LL_SYSCFG_EXTI_PORTS[priv->port_name-'A'], LL_SYSCFG_EXTI_LINES[i]);
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irqd_attach(EXTIS[i], DIn_handleExti, unit);
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}
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}
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}
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// request ticks if we have triggers and any hold-offs configured
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if ((priv->trig_rise|priv->trig_fall) && priv->trig_holdoff > 0) {
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unit->tick_interval = 1;
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}
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return E_SUCCESS;
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}
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/** Tear down the unit */
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void DIn_deInit(Unit *unit)
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{
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struct priv *priv = unit->data;
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// pins are de-inited during teardown
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// Detach EXTI handlers and disable interrupts
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const uint16_t triggs = priv->trig_rise | priv->trig_fall;
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if (unit->status == E_SUCCESS && triggs) {
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uint16_t mask = 1;
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for (int i = 0; i < 16; i++, mask <<= 1) {
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if (triggs & mask) {
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LL_EXTI_DisableIT_0_31(LL_EXTI_LINES[i]);
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irqd_detach(EXTIS[i], DIn_handleExti);
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}
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}
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}
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// Release all resources
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rsc_teardown(unit);
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// Free memory
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free_ck(unit->data);
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}
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