/* * The MIT License (MIT) * * Copyright (c) 2016 Matthias P. Braendli * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include #include #include /* USART 3 on PD8 and PD9 * See pio.txt for PIO allocation details */ const uint16_t GPIOD_PIN_USART3_TX = GPIO_Pin_8; const uint16_t GPIOD_PIN_USART3_RX = GPIO_Pin_9; const uint16_t GPIOD_PIN_GPS_RESET_N = GPIO_Pin_10; /* USART 2 on PA2 and PA3 */ const uint16_t GPIOA_PIN_USART2_RX = GPIO_Pin_3; const uint16_t GPIOA_PIN_USART2_TX = GPIO_Pin_2; #include "../common/includes/GPIO/usart.h" #define USART2_RECEIVE_ENABLE 0 // TODO something is not working void USART2_IRQHandler(void); void USART3_IRQHandler(void); void usart_init() { // ============== PC DEBUG USART =========== RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE); GPIO_InitTypeDef GPIO_InitStruct; GPIO_InitStruct.GPIO_Pin = GPIOA_PIN_USART2_RX | GPIOA_PIN_USART2_TX; GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStruct.GPIO_OType = GPIO_OType_PP; GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP; GPIO_Init(GPIOA, &GPIO_InitStruct); GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_USART2); GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_USART2); // Setup USART2 for 9600,8,N,1 USART_InitTypeDef USART_InitStruct; USART_InitStruct.USART_BaudRate = 115200; USART_InitStruct.USART_WordLength = USART_WordLength_8b; USART_InitStruct.USART_StopBits = USART_StopBits_1; USART_InitStruct.USART_Parity = USART_Parity_No; USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_InitStruct.USART_Mode = USART_Mode_Tx | USART_Mode_Rx; USART_Init(USART2, &USART_InitStruct); #if USART2_RECEIVE_ENABLE // enable the USART2 receive interrupt USART_ITConfig(USART2, USART_IT_RXNE, ENABLE); NVIC_InitTypeDef NVIC_InitStructure; NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 6; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); NVIC_SetPriority(USART2_IRQn, 6); #endif // finally this enables the complete USART2 peripheral USART_Cmd(USART2, ENABLE); } void usart_gps_specific_init() { // ============== GPS USART =========== // Setup GPIO D and connect to USART 3 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE); RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE); GPIO_InitTypeDef GPIO_InitStruct; GPIO_InitStruct.GPIO_Pin = GPIOD_PIN_USART3_RX | GPIOD_PIN_USART3_TX; GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStruct.GPIO_OType = GPIO_OType_PP; GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP; GPIO_Init(GPIOD, &GPIO_InitStruct); GPIO_InitStruct.GPIO_Pin = GPIOD_PIN_GPS_RESET_N; GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT; GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStruct.GPIO_OType = GPIO_OType_PP; GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_Init(GPIOD, &GPIO_InitStruct); // The GPS is put in RESET here, the GPS task will enable it GPIO_ResetBits(GPIOD, GPIOD_PIN_GPS_RESET_N); GPIO_PinAFConfig(GPIOD, GPIO_PinSource8, GPIO_AF_USART3); GPIO_PinAFConfig(GPIOD, GPIO_PinSource9, GPIO_AF_USART3); // Setup USART3 for 9600,8,N,1 USART_InitTypeDef USART_InitStruct; USART_InitStruct.USART_BaudRate = 9600; USART_InitStruct.USART_WordLength = USART_WordLength_8b; USART_InitStruct.USART_StopBits = USART_StopBits_1; USART_InitStruct.USART_Parity = USART_Parity_No; USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_InitStruct.USART_Mode = USART_Mode_Tx | USART_Mode_Rx; USART_Init(USART3, &USART_InitStruct); // enable the USART3 receive interrupt USART_ITConfig(USART3, USART_IT_RXNE, ENABLE); NVIC_InitTypeDef NVIC_InitStructure; NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 6; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); NVIC_SetPriority(USART3_IRQn, 6); // finally this enables the complete USART3 peripheral USART_Cmd(USART3, ENABLE); } void usart_gps_remove_reset(void) { GPIO_SetBits(GPIOD, GPIOD_PIN_GPS_RESET_N); } // Make sure Tasks are suspended when this is called! void usart_puts(USART_TypeDef* USART, const char* str) { while(*str) { // wait until data register is empty USART_SendData(USART, *str); while(USART_GetFlagStatus(USART, USART_FLAG_TXE) == RESET) ; str++; } } void USART3_IRQHandler(void) { if (USART_GetITStatus(USART3, USART_IT_RXNE)) { char t = USART3->DR; usart_gps_process_char(t); } } void USART2_IRQHandler(void) { if (USART_GetITStatus(USART2, USART_IT_RXNE)) { char t = USART2->DR; usart_process_char(t); } }