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gex-core/units/1wire/_ow_init.c

72 lines
2.0 KiB

7 years ago
//
// Created by MightyPork on 2018/02/03.
//
#include "platform.h"
#include "unit_base.h"
#define OW_INTERNAL
#include "_ow_internal.h"
/** Allocate data structure and set defaults */
error_t OW_preInit(Unit *unit)
{
struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv));
if (priv == NULL) return E_OUT_OF_MEM;
// the timer is not started until needed
priv->busyWaitTimer = xTimerCreate("1w_tim", // name
750, // interval (will be changed when starting it)
true, // periodic (we use this only for the polling variant, the one-shot will stop the timer in the CB)
unit, // user data
OW_TimerCb); // callback
if (priv->busyWaitTimer == NULL) return E_OUT_OF_MEM;
// some defaults
priv->pin_number = 0;
priv->port_name = 'A';
priv->parasitic = false;
return E_SUCCESS;
}
/** Finalize unit set-up */
error_t OW_init(Unit *unit)
{
bool suc = true;
struct priv *priv = unit->data;
// --- Parse config ---
priv->ll_pin = hw_pin2ll(priv->pin_number, &suc);
priv->port = hw_port2periph(priv->port_name, &suc);
Resource rsc = hw_pin2resource(priv->port_name, priv->pin_number, &suc);
if (!suc) return E_BAD_CONFIG;
// --- Claim resources ---
TRY(rsc_claim(unit, rsc));
// --- Init hardware ---
LL_GPIO_SetPinMode(priv->port, priv->ll_pin, LL_GPIO_MODE_OUTPUT);
LL_GPIO_SetPinOutputType(priv->port, priv->ll_pin, LL_GPIO_OUTPUT_PUSHPULL);
LL_GPIO_SetPinSpeed(priv->port, priv->ll_pin, LL_GPIO_SPEED_FREQ_HIGH);
LL_GPIO_SetPinPull(priv->port, priv->ll_pin, LL_GPIO_PULL_UP); // pull-up for OD state
return E_SUCCESS;
}
/** Tear down the unit */
void OW_deInit(Unit *unit)
{
struct priv *priv = unit->data;
// Release all resources
rsc_teardown(unit);
// Delete the software timer
assert_param(pdPASS == xTimerDelete(priv->busyWaitTimer, 1000));
// Free memory
free_ck(unit->data);
}