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Commit 850911d1 authored by Sergi Hernandez's avatar Sergi Hernandez
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Added the implementation of the USART2 for the F1 STM32 family.

parent e7ba70a9
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f1/usart/include/usart2.h 0 → 100644
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View file @ 850911d1
#ifndef USART2_F1_H
#define USART2_F1_H
#include "stm32f1xx_hal.h"
#include "usart_common.h"
#include "comm.h"
/* public functions */
void usart2_init(TComm *comm_dev,UART_InitTypeDef *conf,TUSART_IRQ_Priorities *priorities);
void usart2_config(TComm *comm_dev,UART_InitTypeDef *conf);
void usart2_set_priorities(TComm *comm_dev,TUSART_IRQ_Priorities *priorities);
/* IRQ functions */
unsigned char usart2_send_irq(unsigned char first_byte);
unsigned char usart2_enable_tx_irq(void);
unsigned char usart2_receive_irq(void);
unsigned char usart2_cancel_receive_irq(void);
/* DMA functions */
unsigned char usart2_send_dma(unsigned char *data,unsigned short int length);
unsigned char usart2_receive_dma(unsigned char *data,unsigned short int length);
unsigned char usart2_cancel_receive_dma(void);
#endif
f1/usart/src/usart2.c 0 → 100644
+ 338
− 0
View file @ 850911d1
#include "usart2.h"
#define USART USART2
#define USART_ENABLE_CLK __HAL_RCC_USART2_CLK_ENABLE()
#define USART_IRQn USART2_IRQn
#define USART_IRQHandler USART2_IRQHandler
#define USART_TX_PIN GPIO_PIN_2
#define USART_TX_GPIO_PORT GPIOA
#define USART_ENABLE_TX_GPIO_CLK __HAL_RCC_GPIOA_CLK_ENABLE()
#define USART_RX_PIN GPIO_PIN_3
#define USART_RX_GPIO_PORT GPIOA
#define USART_ENABLE_RX_GPIO_CLK __HAL_RCC_GPIOA_CLK_ENABLE()
/* DMA configuration */
#define USART_DMA DMA1
#define USART_ENABLE_DMA_CLK __HAL_RCC_DMA1_CLK_ENABLE()
#define USART_TX_DMA_CHANNEL DMA1_Channel7
#define USART_RX_DMA_CHANNEL DMA1_Channel6
#define USART_DMA_TX_IRQn DMA1_Channel7_IRQn
#define USART_DMA_RX_IRQn DMA1_Channel6_IRQn
#define USART_DMA_TX_IRQHandler DMA1_Channel7_IRQHandler
#define USART_DMA_RX_IRQHandler DMA1_Channel6_IRQHandler
// private variables
UART_HandleTypeDef Uart2Handle;
DMA_HandleTypeDef usart2_hdma_tx;
DMA_HandleTypeDef usart2_hdma_rx;
TComm *usart2_comm_dev;
// interrupt handlers
void USART_IRQHandler(void)
{
unsigned char data,ret;
uint32_t source;
if(__HAL_UART_GET_FLAG(&Uart2Handle, UART_FLAG_RXNE) != RESET)
{
if(__HAL_UART_GET_IT_SOURCE(&Uart2Handle, UART_IT_RXNE) !=RESET)
{
__HAL_UART_CLEAR_FLAG(&Uart2Handle,UART_FLAG_RXNE);
data=(uint8_t)(Uart2Handle.Instance->DR & (uint8_t)0x00FF);
// call the reception function
if(!comm_do_irq_receive(usart2_comm_dev,data))
__HAL_UART_DISABLE_IT(&Uart2Handle, UART_IT_RXNE);
}
}
if(__HAL_UART_GET_FLAG(&Uart2Handle, UART_FLAG_TC) != RESET)
{
if(__HAL_UART_GET_IT_SOURCE(&Uart2Handle, UART_IT_TC) !=RESET)
{
__HAL_UART_CLEAR_FLAG(&Uart2Handle,UART_FLAG_TC);
ret=comm_do_irq_send(usart2_comm_dev,&data);
if(ret==0x01)
Uart2Handle.Instance->DR=data;
else if(ret==0x00)
__HAL_UART_DISABLE_IT(&Uart2Handle, UART_IT_TC);
}
}
if(__HAL_UART_GET_FLAG(&Uart2Handle, UART_FLAG_PE) != RESET)// parity error
{
if(__HAL_UART_GET_IT_SOURCE(&Uart2Handle, UART_IT_PE) !=RESET)
{
__HAL_UART_CLEAR_PEFLAG(&Uart2Handle);
}
}
source=__HAL_UART_GET_IT_SOURCE(&Uart2Handle, UART_IT_ERR);
if(__HAL_UART_GET_FLAG(&Uart2Handle, UART_FLAG_FE) != RESET)// frame error
{
if(source !=RESET)
{
__HAL_UART_CLEAR_FEFLAG(&Uart2Handle);
}
}
if(__HAL_UART_GET_FLAG(&Uart2Handle, UART_FLAG_NE) != RESET)// noise error
{
if(source !=RESET)
{
__HAL_UART_CLEAR_NEFLAG(&Uart2Handle);
}
}
if(__HAL_UART_GET_FLAG(&Uart2Handle, UART_FLAG_ORE) != RESET)// overrun error
{
if(source !=RESET)
{
__HAL_UART_CLEAR_OREFLAG(&Uart2Handle);
}
}
}
void USART_DMA_TX_IRQHandler(void)
{
if(__HAL_DMA_GET_FLAG(Uart2Handle.hdmatx,__HAL_DMA_GET_TE_FLAG_INDEX(Uart2Handle.hdmatx)) != RESET)
{
if(__HAL_DMA_GET_IT_SOURCE(Uart2Handle.hdmatx, DMA_IT_TE) != RESET)
{
/* Disable the transfer error interrupt */
__HAL_DMA_DISABLE_IT(Uart2Handle.hdmatx, DMA_IT_TE);
/* Clear the transfer error flag */
__HAL_DMA_CLEAR_FLAG(Uart2Handle.hdmatx, __HAL_DMA_GET_TE_FLAG_INDEX(Uart2Handle.hdmatx));
}
}
if(__HAL_DMA_GET_FLAG(Uart2Handle.hdmatx,__HAL_DMA_GET_TC_FLAG_INDEX(Uart2Handle.hdmatx)) != RESET)
{
if(__HAL_DMA_GET_IT_SOURCE(Uart2Handle.hdmatx, DMA_IT_TC) != RESET)
{
/* Disable the half transfer interrupt */
__HAL_DMA_DISABLE_IT(Uart2Handle.hdmatx, DMA_IT_TC);
/* Clear the transfer complete flag */
__HAL_DMA_CLEAR_FLAG(Uart2Handle.hdmatx, __HAL_DMA_GET_TC_FLAG_INDEX(Uart2Handle.hdmatx));
CLEAR_BIT(Uart2Handle.Instance->CR3, (USART_CR3_DMAT | USART_CR3_DMAR));
HAL_DMA_Abort(Uart2Handle.hdmatx);
// call the user function
comm_do_dma_send(usart2_comm_dev);
}
}
if(__HAL_DMA_GET_FLAG(Uart2Handle.hdmatx, __HAL_DMA_GET_HT_FLAG_INDEX(Uart2Handle.hdmatx)) != RESET)
{
if(__HAL_DMA_GET_IT_SOURCE(Uart2Handle.hdmatx, DMA_IT_HT) != RESET)
{
/* Disable the half transfer interrupt */
__HAL_DMA_DISABLE_IT(Uart2Handle.hdmatx, DMA_IT_HT);
/* Clear the half transfer complete flag */
__HAL_DMA_CLEAR_FLAG(Uart2Handle.hdmatx, __HAL_DMA_GET_HT_FLAG_INDEX(Uart2Handle.hdmatx));
}
}
}
void USART_DMA_RX_IRQHandler(void)
{
if(__HAL_DMA_GET_FLAG(Uart2Handle.hdmarx,__HAL_DMA_GET_TE_FLAG_INDEX(Uart2Handle.hdmarx)) != RESET)
{
if(__HAL_DMA_GET_IT_SOURCE(Uart2Handle.hdmarx, DMA_IT_TE) != RESET)
{
/* Disable the transfer error interrupt */
__HAL_DMA_DISABLE_IT(Uart2Handle.hdmarx, DMA_IT_TE);
/* Clear the transfer error flag */
__HAL_DMA_CLEAR_FLAG(Uart2Handle.hdmarx, __HAL_DMA_GET_TE_FLAG_INDEX(Uart2Handle.hdmarx));
}
}
if(__HAL_DMA_GET_FLAG(Uart2Handle.hdmarx,__HAL_DMA_GET_TC_FLAG_INDEX(Uart2Handle.hdmarx)) != RESET)
{
if(__HAL_DMA_GET_IT_SOURCE(Uart2Handle.hdmarx, DMA_IT_TC) != RESET)
{
/* Disable the transfer complete interrupt */
__HAL_DMA_DISABLE_IT(Uart2Handle.hdmarx, DMA_IT_TC);
/* Clear the transfer complete flag */
__HAL_DMA_CLEAR_FLAG(Uart2Handle.hdmarx, __HAL_DMA_GET_TC_FLAG_INDEX(Uart2Handle.hdmarx));
CLEAR_BIT(Uart2Handle.Instance->CR3, (USART_CR3_DMAT | USART_CR3_DMAR));
HAL_DMA_Abort(Uart2Handle.hdmarx);
// call the user function
comm_do_dma_receive(usart2_comm_dev);
}
}
if(__HAL_DMA_GET_FLAG(Uart2Handle.hdmarx, __HAL_DMA_GET_HT_FLAG_INDEX(Uart2Handle.hdmarx)) != RESET)
{
if(__HAL_DMA_GET_IT_SOURCE(Uart2Handle.hdmarx, DMA_IT_HT) != RESET)
{
/* Disable the half transfer interrupt */
__HAL_DMA_DISABLE_IT(Uart2Handle.hdmarx, DMA_IT_HT);
/* Clear the half transfer complete flag */
__HAL_DMA_CLEAR_FLAG(Uart2Handle.hdmarx, __HAL_DMA_GET_HT_FLAG_INDEX(Uart2Handle.hdmarx));
}
}
}
/* public functions*/
void usart2_init(TComm *comm_dev,UART_InitTypeDef *conf,TUSART_IRQ_Priorities *priorities)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable GPIO clock */
USART_ENABLE_TX_GPIO_CLK;
USART_ENABLE_RX_GPIO_CLK;
USART_ENABLE_DMA_CLK;
// configure the GPIO pins
/* Configure USART Tx and Rx as alternate function push-pull */
GPIO_InitStructure.Pin = USART_TX_PIN;
GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
GPIO_InitStructure.Pull = GPIO_PULLUP;
GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
HAL_GPIO_Init(USART_TX_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.Pin = USART_RX_PIN;
GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
HAL_GPIO_Init(USART_RX_GPIO_PORT, &GPIO_InitStructure);
USART_ENABLE_CLK;
Uart2Handle.Instance = USART;
usart2_config(comm_dev,conf);
if(comm_dev->use_dma)
{
// configure the DMA channels
usart2_hdma_tx.Instance = USART_TX_DMA_CHANNEL;
usart2_hdma_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
usart2_hdma_tx.Init.PeriphInc = DMA_PINC_DISABLE;
usart2_hdma_tx.Init.MemInc = DMA_MINC_ENABLE;
usart2_hdma_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
usart2_hdma_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
usart2_hdma_tx.Init.Mode = DMA_NORMAL;
usart2_hdma_tx.Init.Priority = DMA_PRIORITY_LOW;
HAL_DMA_Init(&usart2_hdma_tx);
/* Associate the initialized DMA handle to the UART handle */
__HAL_LINKDMA(&Uart2Handle, hdmatx, usart2_hdma_tx);
/* Configure the DMA handler for reception process */
usart2_hdma_rx.Instance = USART_RX_DMA_CHANNEL;
usart2_hdma_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
usart2_hdma_rx.Init.PeriphInc = DMA_PINC_DISABLE;
usart2_hdma_rx.Init.MemInc = DMA_MINC_ENABLE;
usart2_hdma_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
usart2_hdma_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
usart2_hdma_rx.Init.Mode = DMA_NORMAL;
usart2_hdma_rx.Init.Priority = DMA_PRIORITY_HIGH;
HAL_DMA_Init(&usart2_hdma_rx);
/* Associate the initialized DMA handle to the the UART handle */
__HAL_LINKDMA(&Uart2Handle, hdmarx, usart2_hdma_rx);
}
usart2_set_priorities(comm_dev,priorities);
/* Initialize the comm structure */
comm_dev->send_irq=usart2_send_irq;
comm_dev->enable_tx_irq=usart2_enable_tx_irq;
comm_dev->receive_irq=usart2_receive_irq;
comm_dev->cancel_receive_irq=usart2_cancel_receive_irq;
if(comm_dev->use_dma)
{
comm_dev->send_dma=usart2_send_dma;
comm_dev->receive_dma=usart2_receive_dma;
comm_dev->cancel_receive_dma=usart2_cancel_receive_dma;
}
comm_dev->irq_send_cb=0x00000000;
comm_dev->irq_receive_cb=0x00000000;
comm_dev->dma_send_cb=0x00000000;
comm_dev->dma_receive_cb=0x00000000;
/* initialize internal variables */
usart2_comm_dev=comm_dev;
}
void usart2_config(TComm *comm_dev,UART_InitTypeDef *conf)
{
Uart2Handle.Init.BaudRate = conf->BaudRate;
Uart2Handle.Init.WordLength = conf->WordLength;
Uart2Handle.Init.StopBits = conf->StopBits;
Uart2Handle.Init.Parity = conf->Parity;
Uart2Handle.Init.Mode = conf->Mode;
Uart2Handle.Init.HwFlowCtl = conf->HwFlowCtl;
Uart2Handle.Init.OverSampling = conf->OverSampling;
HAL_UART_Init(&Uart2Handle);
}
void usart2_set_priorities(TComm *comm_dev,TUSART_IRQ_Priorities *priorities)
{
HAL_NVIC_SetPriority(USART_IRQn, priorities->irq_priority,priorities->irq_subpriority);
HAL_NVIC_EnableIRQ(USART_IRQn);
if(comm_dev->use_dma)
{
HAL_NVIC_SetPriority(USART_DMA_TX_IRQn, priorities->dma_tx_priority,priorities->dma_tx_subpriority);
HAL_NVIC_EnableIRQ(USART_DMA_TX_IRQn);
HAL_NVIC_SetPriority(USART_DMA_RX_IRQn, priorities->dma_rx_priority,priorities->dma_rx_subpriority);
HAL_NVIC_EnableIRQ(USART_DMA_RX_IRQn);
}
}
/* IRQ functions */
unsigned char usart2_send_irq(unsigned char first_byte)
{
__HAL_UART_CLEAR_FLAG(&Uart2Handle,UART_FLAG_TC);
__HAL_UART_ENABLE_IT(&Uart2Handle, UART_IT_TC);
Uart2Handle.Instance->DR=first_byte;
return 0x00;
}
unsigned char usart2_enable_tx_irq(void)
{
__HAL_UART_CLEAR_FLAG(&Uart2Handle,UART_FLAG_TC);
__HAL_UART_ENABLE_IT(&Uart2Handle, UART_IT_TC);
return 0x00;
}
unsigned char usart2_receive_irq(void)
{
/* enable the rx interrupt */
__HAL_UART_ENABLE_IT(&Uart2Handle, UART_IT_RXNE);
return 0x00;
}
unsigned char usart2_cancel_receive_irq(void)
{
/* disable the rx interrupt */
__HAL_UART_DISABLE_IT(&Uart2Handle, UART_IT_RXNE);
return 0x00;
}
/* DMA functions */
unsigned char usart2_send_dma(unsigned char *data,unsigned short int length)
{
HAL_DMA_Start_IT(Uart2Handle.hdmatx,(uint32_t)data,(uint32_t)&Uart2Handle.Instance->DR,length);
/* Clear the TC flag in the SR register by writing 0 to it */
__HAL_UART_CLEAR_FLAG(&Uart2Handle,UART_FLAG_TC);
/* Enable the DMA transfer for transmit request by setting the DMAT bit
in the UART CR3 register */
SET_BIT(Uart2Handle.Instance->CR3, USART_CR3_DMAT);
return 0x00;
}
unsigned char usart2_receive_dma(unsigned char *data,unsigned short int length)
{
HAL_DMA_Start_IT(Uart2Handle.hdmarx,(uint32_t)&Uart2Handle.Instance->DR,(uint32_t)data,length);
SET_BIT(Uart2Handle.Instance->CR3, USART_CR3_DMAR);
return 0x00;
}
unsigned char usart2_cancel_receive_dma(void)
{
CLEAR_BIT(Uart2Handle.Instance->CR3, (USART_CR3_DMAT | USART_CR3_DMAR));
HAL_DMA_Abort(Uart2Handle.hdmarx);
return 0x00;
}
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