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60 lines
1.4 KiB
60 lines
1.4 KiB
6 years ago
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//
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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 OW_INTERNAL
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#include "_ow_internal.h"
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/** Allocate data structure and set defaults */
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error_t OW_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->pin_number = 0;
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priv->port_name = 'A';
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priv->parasitic = false;
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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 OW_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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// --- Parse config ---
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priv->ll_pin = hw_pin2ll(priv->pin_number, &suc);
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priv->port = hw_port2periph(priv->port_name, &suc);
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Resource rsc = rsc_portpin2rsc(priv->port_name, priv->pin_number, &suc);
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if (!suc) return E_BAD_CONFIG;
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// --- Claim resources ---
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TRY(rsc_claim(unit, rsc));
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// --- Init hardware ---
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LL_GPIO_SetPinMode(priv->port, priv->ll_pin, LL_GPIO_MODE_OUTPUT);
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LL_GPIO_SetPinOutputType(priv->port, priv->ll_pin, LL_GPIO_OUTPUT_PUSHPULL);
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LL_GPIO_SetPinSpeed(priv->port, priv->ll_pin, LL_GPIO_SPEED_FREQ_HIGH);
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LL_GPIO_SetPinPull(priv->port, priv->ll_pin, LL_GPIO_PULL_UP); // pull-up for OD state
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return E_SUCCESS;
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}
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/** Tear down the unit */
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void OW_deInit(Unit *unit)
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{
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struct priv *priv = unit->data;
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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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