commit
9b1d084308
GPG Key ID:
2C5FD5035250423D
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//
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// Created by MightyPork on 2018/03/23.
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//
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#include <stm32f072xb.h> |
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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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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 void 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 -
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// in or running from a battery/external supply remotely.
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// Check if USB is enumerated
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const uint32_t uadr = (USB->DADDR & USB_DADDR_ADD); |
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if (0 == uadr) { |
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dbg("Not enumerated, assuming USB is dead"); |
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// Fallback to bare USART
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if (SystemSettings.use_comm_uart) { |
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configure_interface(COMPORT_USART); |
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} |
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else if (SystemSettings.use_comm_nordic) { |
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configure_interface(COMPORT_NORDIC); // this fallbacks to LoRa if LoRa enabled
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} |
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else if (SystemSettings.use_comm_lora) { |
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configure_interface(COMPORT_LORA); |
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} |
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else { |
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dbg("No alternate com interface configured, leaving USB enabled."); |
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} |
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} else { |
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dbg("USB got address 0x%02x - OK", (int)uadr); |
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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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do { |
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if (E_SUCCESS != rsc_claim(&UNIT_SYSTEM, R_USART2)) { |
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SystemSettings.use_comm_uart = false; |
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break; |
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} |
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if (E_SUCCESS != rsc_claim(&UNIT_SYSTEM, R_PA2)) { |
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SystemSettings.use_comm_uart = false; |
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rsc_free(&UNIT_SYSTEM, R_USART2); |
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break; |
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} |
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if (E_SUCCESS != rsc_claim(&UNIT_SYSTEM, R_PA3)) { |
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SystemSettings.use_comm_uart = false; |
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rsc_free(&UNIT_SYSTEM, R_USART2); |
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rsc_free(&UNIT_SYSTEM, R_PA2); |
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break; |
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} |
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} while (0); |
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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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rsc_free(&UNIT_SYSTEM, R_USART2); |
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rsc_free(&UNIT_SYSTEM, R_PA2); |
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rsc_free(&UNIT_SYSTEM, R_PA3); |
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} |
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} |
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static uint32_t usart_rxi = 0; |
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static uint8_t usart_rx_buffer[MSG_QUE_SLOT_SIZE]; |
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static uint32_t last_rx_time = 0; |
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/** Handler for the USART transport */ |
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static void com_UsartIrqHandler(void *arg) |
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{ |
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(void)arg; |
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if (LL_USART_IsActiveFlag_RXNE(USART2)) { |
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vPortEnterCritical(); |
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{ |
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usart_rx_buffer[usart_rxi++] = LL_USART_ReceiveData8(USART2); |
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if (usart_rxi == MSG_QUE_SLOT_SIZE) { |
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rxQuePostMsg(usart_rx_buffer, MSG_QUE_SLOT_SIZE); // avoid it happening in the irq
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usart_rxi = 0; |
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} |
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last_rx_time = HAL_GetTick(); |
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} |
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vPortExitCritical(); |
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} |
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} |
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/** this is called from the hal tick irq */ |
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void com_iface_flush_buffer(void) |
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{ |
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if (usart_rxi > 0 && (HAL_GetTick()-last_rx_time)>=2) { |
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vPortEnterCritical(); |
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{ |
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rxQuePostMsg(usart_rx_buffer, usart_rxi); |
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usart_rxi = 0; |
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} |
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vPortExitCritical(); |
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} |
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} |
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static void 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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// this doesn't normally happen
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hw_deinit_pin_rsc(R_PA2); |
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hw_deinit_pin_rsc(R_PA3); |
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__HAL_RCC_USART2_CLK_DISABLE(); |
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irqd_detach(USART2, com_UsartIrqHandler); |
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} |
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gActiveComport = COMPORT_NONE; |
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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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} |
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else if (iface == COMPORT_USART) { |
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dbg("Setting up UART transfer"); |
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assert_param(E_SUCCESS == hw_configure_gpiorsc_af(R_PA2, LL_GPIO_AF_1)); |
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assert_param(E_SUCCESS == hw_configure_gpiorsc_af(R_PA3, LL_GPIO_AF_1)); |
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__HAL_RCC_USART2_CLK_ENABLE(); |
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__HAL_RCC_USART2_FORCE_RESET(); |
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__HAL_RCC_USART2_RELEASE_RESET(); |
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LL_USART_Disable(USART2); |
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LL_USART_SetBaudRate(USART2, PLAT_APB1_HZ, LL_USART_OVERSAMPLING_16, SystemSettings.comm_uart_baud); |
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dbg("baud = %d", (int)SystemSettings.comm_uart_baud); |
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irqd_attach(USART2, com_UsartIrqHandler, NULL); |
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LL_USART_EnableIT_RXNE(USART2); |
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LL_USART_SetTransferDirection(USART2, LL_USART_DIRECTION_TX_RX); |
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LL_USART_Enable(USART2); |
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} |
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else { |
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if (iface == COMPORT_NORDIC) { |
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// Try to configure nordic
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dbg("Setting up nRF transfer"); |
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// TODO set up and check nRF transport
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// On failure, try setting up LoRa
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dbg("nRF failed to init"); |
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if (SystemSettings.use_comm_lora) { |
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iface = COMPORT_LORA; |
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} else { |
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iface = COMPORT_NONE; // fail
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} |
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} |
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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 failed to init"); |
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iface = COMPORT_NONE; // fail
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} |
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} |
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if (iface == COMPORT_NONE) { |
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dbg("NO COM PORT AVAILABLE!"); |
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} |
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gActiveComport = iface; |
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} |
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@ -0,0 +1,35 @@ |
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//
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// Created by MightyPork on 2018/03/23.
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//
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#ifndef GEX_F072_COM_INTERFACES_H |
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#define GEX_F072_COM_INTERFACES_H |
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#include "platform.h" |
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enum ComportSelection { |
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COMPORT_NONE = 0, |
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COMPORT_USB = 1, |
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COMPORT_USART = 2, |
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COMPORT_NORDIC = 3, |
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COMPORT_LORA = 4, |
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}; |
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/**
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* The currently active communication port |
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*/ |
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extern enum ComportSelection gActiveComport; |
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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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/** 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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/** Release resources allocated for alternate transfers */ |
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void com_release_resources_for_alt_transfers(void); |
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/** Flush the rx buffer */ |
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void com_iface_flush_buffer(void); |
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#endif //GEX_F072_COM_INTERFACES_H
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