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camera_uart.c
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camera_uart.c
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/*********************************************************************
* Filename: camera_uart.c
*
*
* Author: Bright Pan <loststriker@gmail.com>
* Created at: 2013-05-08 10:08:32
*
*
* Change Log:
*
* Copyright (C) 2013 Yuettak Co.,Ltd
********************************************************************/
#include "camera_uart.h"
/*
* Use UART4 with interrupt Rx and poll Tx
*
*/
/* UART5_REMAP = 0 */
#define CAMERA_UART_GPIO_PIN_TX GPIO_Pin_12
#define CAMERA_UART_GPIO_PIN_RX GPIO_Pin_2
#define CAMERA_UART_GPIO_TX GPIOC
#define CAMERA_UART_GPIO_RX GPIOD
#define CAMERA_UART_GPIO_RCC_TX RCC_APB2Periph_GPIOC
#define CAMERA_UART_GPIO_RCC_RX RCC_APB2Periph_GPIOD
#define CAMERA_UART_RCC RCC_APB1Periph_UART5
#define CAMERA_UART UART5
static rt_err_t camera_uart_pos_configure(struct rt_serial_device *serial, struct serial_configure *cfg);
static rt_size_t camera_uart_pos_dma_transmit(struct rt_serial_device *serial, const char *buf, rt_size_t size);
static int camera_uart_pos_getc(struct rt_serial_device *serial);
static int camera_uart_pos_putc(struct rt_serial_device *serial, char c);
static rt_err_t camera_uart_pos_control(struct rt_serial_device *serial, int cmd, void *arg);
struct rt_uart_ops camera_uart_pos =
{
camera_uart_pos_configure,
camera_uart_pos_control,
camera_uart_pos_putc,
camera_uart_pos_getc,
camera_uart_pos_dma_transmit,
};
struct serial_configure camera_uart_default_config = RT_SERIAL_CONFIG_DEFAULT;
struct camera_uart_user_data_t camera_uart_user_data =
{
CAMERA_UART,
RT_NULL,
RT_NULL,
};
struct serial_ringbuffer camera_uart_int_rx;
struct serial_ringbuffer camera_uart_int_tx;
rt_serial_t camera_uart_device;
static void RCC_Configuration(struct rt_serial_device *serial)
{
/*
struct serial_user_data *user_data;
user_data = serial->parent.user_data;
*/
/* Enable AFIO and CAMERA_UART_GPIO clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | CAMERA_UART_GPIO_RCC_TX | CAMERA_UART_GPIO_RCC_RX, ENABLE);
/* Enable CAMERA_UART_RCC clock */
RCC_APB1PeriphClockCmd(CAMERA_UART_RCC, ENABLE);
}
static void GPIO_Configuration(struct rt_serial_device *serial)
{
GPIO_InitTypeDef GPIO_InitStructure;
/*
struct serial_user_data *user_data;
user_data = serial->parent.user_data;
*/
/* Configure USART2 Rx CTS as input floating */
GPIO_StructInit(&GPIO_InitStructure);
//GPIO_InitStructure.GPIO_Pin = CAMERA_UART_GPIO_PIN_RX | CAMERA_UART_GPIO_PIN_CTS;
GPIO_InitStructure.GPIO_Pin = CAMERA_UART_GPIO_PIN_RX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(CAMERA_UART_GPIO_RX, &GPIO_InitStructure);
/* Configure USART2 Tx RTS as alternate function push-pull */
GPIO_StructInit(&GPIO_InitStructure);
//GPIO_InitStructure.GPIO_Pin = CAMERA_UART_GPIO_PIN_TX | CAMERA_UART_GPIO_PIN_RTS;
GPIO_InitStructure.GPIO_Pin = CAMERA_UART_GPIO_PIN_TX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(CAMERA_UART_GPIO_TX, &GPIO_InitStructure);
}
static void NVIC_Configuration(struct rt_serial_device *serial)
{
NVIC_InitTypeDef NVIC_InitStructure;
/*
struct serial_user_data *user_data;
user_data = serial->parent.user_data;
*/
if ((serial->parent.flag & RT_DEVICE_FLAG_INT_RX) | (serial->parent.flag & RT_DEVICE_FLAG_INT_TX))
{
NVIC_InitStructure.NVIC_IRQChannel = UART5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
}
static rt_err_t camera_uart_pos_control(struct rt_serial_device *serial, int cmd, void *arg)
{
return RT_EOK;
}
/*
* poll send data to gsm
*
*/
static int camera_uart_pos_putc(struct rt_serial_device *serial, char c)
{
struct camera_uart_user_data_t *user_data;
user_data = serial->parent.user_data;
USART_SendData(user_data->usart, c);
while (USART_GetFlagStatus(user_data->usart, USART_FLAG_TXE) == RESET)
{
;
}
return RT_EOK;
}
/*
* poll get data from gsm
*
*/
static int camera_uart_pos_getc(struct rt_serial_device *serial)
{
struct camera_uart_user_data_t *user_data;
user_data = serial->parent.user_data;
if (USART_GetFlagStatus(user_data->usart, USART_FLAG_RXNE) != RESET)
{
return USART_ReceiveData(user_data->usart);
}
return -1;
}
static rt_size_t camera_uart_pos_dma_transmit(struct rt_serial_device *serial, const char *buf, rt_size_t size)
{
struct camera_uart_user_data_t *user_data;
user_data = serial->parent.user_data;
/* disable DMA */
DMA_Cmd(user_data->usart_tx_dma_channel, DISABLE);
/* set buffer address */
user_data->usart_tx_dma_channel->CMAR = (rt_uint32_t)buf;
/* set size */
user_data->usart_tx_dma_channel->CNDTR = size;
/* enable DMA */
DMA_Cmd(user_data->usart_tx_dma_channel, ENABLE);
return size;
}
static rt_err_t camera_uart_pos_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{
USART_InitTypeDef USART_InitStructure;
struct camera_uart_user_data_t *user_data;
user_data = serial->parent.user_data;
RCC_Configuration(serial);
GPIO_Configuration(serial);
NVIC_Configuration(serial);
/* uart init */
USART_StructInit(&USART_InitStructure);
USART_InitStructure.USART_BaudRate = cfg->baud_rate;
switch(cfg->data_bits)
{
case 8:
{
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
break;
}
case 9:
{
USART_InitStructure.USART_WordLength = USART_WordLength_9b;
break;
}
default :
{
#ifdef RT_USING_FINSH
rt_kprintf("data bit set error\n");
#endif
break;
}
}
switch(cfg->stop_bits)
{
case 0:
{
USART_InitStructure.USART_StopBits = USART_StopBits_1;
break;
}
case 1:
{
USART_InitStructure.USART_StopBits = USART_StopBits_2;
break;
}
case 2:
{
USART_InitStructure.USART_StopBits = USART_StopBits_0_5;
break;
}
case 3:
{
USART_InitStructure.USART_StopBits = USART_StopBits_1_5;
break;
}
default :
{
#ifdef RT_USING_FINSH
rt_kprintf("stopbits bit set error\n");
#endif
break;
}
}
switch(cfg->parity)
{
case 0:
{
USART_InitStructure.USART_Parity = USART_Parity_No;
break;
}
case 1:
{
USART_InitStructure.USART_Parity = USART_Parity_Odd;
break;
}
case 2:
{
USART_InitStructure.USART_Parity = USART_Parity_Even;
break;
}
default :
{
#ifdef RT_USING_FINSH
rt_kprintf("data bit set error\n");
#endif
break;
}
}
/* set hardware flow control */
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(user_data->usart, &USART_InitStructure);
/* enable usart */
USART_Cmd(user_data->usart, ENABLE);
if (serial->parent.flag & RT_DEVICE_FLAG_INT_RX)
{
/* enable interrupt */
USART_ITConfig(user_data->usart, USART_IT_RXNE, ENABLE);
USART_ITConfig(user_data->usart, USART_IT_ERR, ENABLE);
}
return RT_EOK;
}
/*
* Init all related hardware in here
* rt_hw_camera_uart_register() will register all supported GSM device
*/
void rt_hw_camera_uart_register(void)
{
camera_uart_device.ops = &camera_uart_pos;
camera_uart_device.int_rx = &camera_uart_int_rx;
camera_uart_device.int_tx = &camera_uart_int_tx;
camera_uart_device.config = camera_uart_default_config;
rt_hw_serial_register(&camera_uart_device, DEVICE_NAME_CAMERA_UART,
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
&camera_uart_user_data);
rt_kprintf("register camera usart device\n");
}
void camera_uart_device_isr(struct rt_serial_device *serial)
{
struct camera_uart_user_data_t *user_data;
user_data = serial->parent.user_data;
if(USART_GetFlagStatus(user_data->usart, USART_FLAG_ORE) != RESET)
{
USART_ReceiveData(user_data->usart);
while (USART_GetFlagStatus(user_data->usart, USART_FLAG_RXNE) != RESET)
{
USART_ReceiveData(user_data->usart);
}
}
if(USART_GetFlagStatus(user_data->usart, USART_FLAG_NE) != RESET)
{//USART_IT_NE : Noise Error interrupt
USART_ReceiveData(user_data->usart);
}
if(USART_GetFlagStatus(user_data->usart, USART_FLAG_FE) != RESET)
{//USART_IT_FE : Framing Error interrupt
USART_ReceiveData(user_data->usart);
}
if(USART_GetFlagStatus(user_data->usart, USART_FLAG_PE) != RESET)
{//USART_IT_PE : Parity Error interrupt
USART_ReceiveData(user_data->usart);
}
rt_hw_serial_isr(serial);
}
#ifdef RT_USING_FINSH
#include <finsh.h>
static char temp[100];
void camera_uart(char cmd, char *str)
{
rt_device_t device;
memset(temp, '\xFF', 100);
device = rt_device_find(DEVICE_NAME_CAMERA_UART);
if (device != RT_NULL)
{
if (cmd == 0)
{
rt_device_read(device, 0, temp, 20);
temp[99] = '\0';
rt_kprintf(temp);
}
else if (cmd == 1)
{
rt_device_write(device, 0, str, strlen(str));
}
}
else
{
rt_kprintf("device %s is not exist!\n", DEVICE_NAME_CAMERA_UART);
}
}
FINSH_FUNCTION_EXPORT(camera_uart, camera_uart[cmd parameters])
#endif