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/*
* 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 <stm32f4xx.h>
#include <stm32f4xx_usart.h>
#include <stm32f4xx_conf.h>
/* 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 = 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(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);
}
}
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