[X12S] GPS low level driver added

2016-08-18 17:23:46 +02:00
parent 5d7f4ebc0b
commit 3e4f3b2a8e
5 changed files with 114 additions and 7 deletions
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) OpenTX
+ *
+ * Based on code named
+ *   th9x - http://code.google.com/p/th9x
+ *   er9x - http://code.google.com/p/er9x
+ *   gruvin9x - http://code.google.com/p/gruvin9x
+ *
+ * License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include "opentx.h"
+
+void gpsInit()
+{
+  GPIO_InitTypeDef GPIO_InitStructure;
+  USART_InitTypeDef USART_InitStructure;
+  NVIC_InitTypeDef NVIC_InitStructure;
+  
+  // RX and TX pins
+  GPIO_PinAFConfig(GPIOA, GPS_TX_GPIO_PinSource, GPS_GPIO_AF);
+  GPIO_PinAFConfig(GPIOA, GPS_RX_GPIO_PinSource, GPS_GPIO_AF);
+  GPIO_InitStructure.GPIO_Pin = (GPS_TX_GPIO_PIN | GPS_RX_GPIO_PIN);
+  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
+  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
+  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
+  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
+  GPIO_Init(GPS_UART_GPIO, &GPIO_InitStructure);
+  
+  // UART config
+  USART_InitStructure.USART_BaudRate = GPS_USART_BAUDRATE;
+  USART_InitStructure.USART_Parity = USART_Parity_No;
+  USART_InitStructure.USART_StopBits = USART_StopBits_1;
+  USART_InitStructure.USART_WordLength = USART_WordLength_8b;
+  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
+  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
+  USART_Init(GPS_USART, &USART_InitStructure);
+  USART_Cmd(GPS_USART, ENABLE);
+  
+  USART_ITConfig(GPS_USART, USART_IT_RXNE, ENABLE);
+  
+  NVIC_InitStructure.NVIC_IRQChannel = GPS_USART_IRQn;
+  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x9;
+  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0;
+  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
+  NVIC_Init(&NVIC_InitStructure);
+}
+
+extern "C" void GPS_USART_IRQHandler(void)
+{
+#if 0
+  // Send
+  if (USART_GetITStatus(GPS_USART, USART_IT_TXE) != RESET) {
+    uint8_t txchar;
+    if (gpsTxFifo.pop(txchar)) {
+      /* Write one byte to the transmit data register */
+      USART_SendData(GPS_USART, txchar);
+    }
+    else {
+      USART_ITConfig(GPS_USART, USART_IT_TXE, DISABLE);
+    }
+  }
+#endif
+  
+  // Receive
+  uint32_t status = GPS_USART->SR;
+  while (status & (USART_FLAG_RXNE | USART_FLAG_ERRORS)) {
+    uint8_t data = GPS_USART->DR;
+    if (!(status & USART_FLAG_ERRORS)) {
+      // TODO gpsRxFifo.push(data);
+    }
+    status = GPS_USART->SR;
+  }
+}