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139 lines
3.7 KiB
139 lines
3.7 KiB
//
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// Created by MightyPork on 2018/03/23.
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//
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#include "platform.h"
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#include "usbd_core.h"
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#include "USB/usb_device.h"
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#include "interfaces.h"
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#include "framework/system_settings.h"
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#include "framework/unit.h"
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#include "framework/resources.h"
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#include "platform/hw_utils.h"
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#include "framework/unit_base.h"
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#include "nrf_pins.h"
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#include "iface_uart.h"
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#include "iface_usb.h"
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#include "iface_nordic.h"
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enum ComportSelection gActiveComport = COMPORT_USB; // start with USB so the handlers work correctly initially
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static uint32_t last_switch_time = 0; // started with USB
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static bool xfer_verify_done = false;
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static bool configure_interface(enum ComportSelection iface);
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/** Switch com transfer if the current one doesnt seem to work */
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void com_switch_transfer_if_needed(void)
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{
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if (xfer_verify_done) return;
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const uint32_t now = HAL_GetTick();
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const uint32_t elapsed = now - last_switch_time;
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if (gActiveComport == COMPORT_USB) {
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if (elapsed > 1000) {
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// USB may or may not work, depending on whether the module is plugged in
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// or running from a battery/external supply remotely.
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// Check if USB is enumerated
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if (!iface_usb_ready()) {
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dbg("Not enumerated, assuming USB is dead");
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// Fallback to radio or bare USART
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do {
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if (SystemSettings.use_comm_nordic) {
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if (configure_interface(COMPORT_NORDIC)) break;
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}
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#if 0
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if (SystemSettings.use_comm_lora) {
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if (configure_interface(COMPORT_LORA)) break;
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}
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#endif
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if (SystemSettings.use_comm_uart) {
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// after nordic/lora
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if (configure_interface(COMPORT_USART)) break;
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}
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dbg("No alternate com interface configured.");
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gActiveComport = COMPORT_NONE;
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} while (0);
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} else {
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dbg("USB got address - OK");
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}
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xfer_verify_done = true;
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}
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}
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}
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/** Claim resources that may be needed for alternate transfers */
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void com_claim_resources_for_alt_transfers(void)
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{
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if (SystemSettings.use_comm_uart) {
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iface_uart_claim_resources();
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}
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if (SystemSettings.use_comm_nordic) {
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iface_nordic_claim_resources();
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}
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}
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/** Release resources allocated for alternate transfers */
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void com_release_resources_for_alt_transfers(void)
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{
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if (SystemSettings.use_comm_uart) {
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iface_uart_free_resources();
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}
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if (SystemSettings.use_comm_nordic) {
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iface_nordic_free_resources();
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}
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}
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static bool configure_interface(enum ComportSelection iface)
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{
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// Teardown
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if (gActiveComport == COMPORT_USB) {
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// simplest USB disabling (XXX needs porting)
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HAL_PCD_DeInit(&hpcd_USB_FS);
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__HAL_RCC_USB_CLK_DISABLE();
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}
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else if (gActiveComport == COMPORT_USART) {
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iface_uart_deinit();
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}
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else if (gActiveComport == COMPORT_NORDIC) {
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iface_nordic_deinit();
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}
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gActiveComport = iface;
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// Init
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if (iface == COMPORT_USB) {
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trap("illegal"); // this never happens
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return false;
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}
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else if (iface == COMPORT_USART) {
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return iface_uart_init();
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}
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else if (iface == COMPORT_NORDIC) {
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return iface_nordic_init();
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}
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#if 0
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else if (iface == COMPORT_LORA) {
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// Try to configure nordic
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dbg("Setting up LoRa transfer");
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// TODO set up and check LoRa transport
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dbg("LoRa not impl!");
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return false;
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}
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#endif
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else {
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trap("Bad iface %d", iface);
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}
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}
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