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gex-core/comm/interfaces.c

148 lines
3.8 KiB

//
// Created by MightyPork on 2018/03/23.
//
#include "platform.h"
#include "usbd_core.h"
#include "USB/usb_device.h"
#include "interfaces.h"
#include "framework/system_settings.h"
#include "framework/unit.h"
#include "framework/resources.h"
#include "platform/hw_utils.h"
#include "framework/unit_base.h"
#include "nrf_pins.h"
#include "iface_uart.h"
#include "iface_usb.h"
#include "iface_nordic.h"
const char * COMPORT_NAMES[] = {
"NONE",
"USB",
"UART",
"NRF",
"LORA",
};
enum ComportSelection gActiveComport = COMPORT_USB; // start with USB so the handlers work correctly initially
static uint32_t last_switch_time = 0; // started with USB
static bool xfer_verify_done = false;
static bool configure_interface(enum ComportSelection iface);
/** Switch com transfer if the current one doesnt seem to work */
void com_switch_transfer_if_needed(void)
{
if (xfer_verify_done) return;
const uint32_t now = HAL_GetTick();
const uint32_t elapsed = now - last_switch_time;
if (gActiveComport == COMPORT_USB) {
if (elapsed > 1000) {
// USB may or may not work, depending on whether the module is plugged in
// or running from a battery/external supply remotely.
// Check if USB is enumerated
if (!iface_usb_ready()) {
dbg("Not enumerated, assuming USB is dead");
// Fallback to radio or bare USART
do {
if (SystemSettings.use_comm_nordic) {
if (configure_interface(COMPORT_NORDIC)) break;
}
#if 0
if (SystemSettings.use_comm_lora) {
if (configure_interface(COMPORT_LORA)) break;
}
#endif
if (SystemSettings.use_comm_uart) {
// after nordic/lora
if (configure_interface(COMPORT_USART)) break;
}
dbg("No alternate com interface configured.");
gActiveComport = COMPORT_NONE;
} while (0);
} else {
dbg("USB got address - OK");
}
xfer_verify_done = true;
}
}
}
/** Claim resources that may be needed for alternate transfers */
void com_claim_resources_for_alt_transfers(void)
{
if (SystemSettings.use_comm_uart) {
iface_uart_claim_resources();
}
if (SystemSettings.use_comm_nordic) {
iface_nordic_claim_resources();
}
}
/** Release resources allocated for alternate transfers */
void com_release_resources_for_alt_transfers(void)
{
if (SystemSettings.use_comm_uart) {
iface_uart_free_resources();
}
if (SystemSettings.use_comm_nordic) {
iface_nordic_free_resources();
}
}
static bool configure_interface(enum ComportSelection iface)
{
// Teardown
if (gActiveComport == COMPORT_USB) {
// simplest USB disabling (XXX needs porting)
HAL_PCD_DeInit(&hpcd_USB_FS);
__HAL_RCC_USB_CLK_DISABLE();
}
else if (gActiveComport == COMPORT_USART) {
iface_uart_deinit();
}
else if (gActiveComport == COMPORT_NORDIC) {
iface_nordic_deinit();
}
gActiveComport = iface;
// Init
if (iface == COMPORT_USB) {
trap("illegal"); // this never happens
return false;
}
else if (iface == COMPORT_USART) {
return iface_uart_init();
}
else if (iface == COMPORT_NORDIC) {
return iface_nordic_init();
}
#if 0
else if (iface == COMPORT_LORA) {
// Try to configure nordic
dbg("Setting up LoRa transfer");
// TODO set up and check LoRa transport
dbg("LoRa not impl!");
return false;
}
#endif
else {
trap("Bad iface %d", iface);
}
}