stm32f407单片机通过并口驱动ad7606源程序 -

#include "adc7606.h"
//AD_OS0 PG4
#define OS0_1() GPIOG->BSRRL = GPIO_Pin_4
#define OS0_0() GPIOG->BSRRH = GPIO_Pin_4
//AD_OS1 PG3
#define OS1_1() GPIOG->BSRRL = GPIO_Pin_3
#define OS1_0() GPIOG->BSRRH = GPIO_Pin_3
//AD_OS2 PG2
#define OS2_1() GPIOG->BSRRL = GPIO_Pin_2
#define OS2_0() GPIOG->BSRRH = GPIO_Pin_2
//PD11 CNVTA
//PB15 CNVTB TIM_CH3N/TIM8_CH3N/TIM12_CH2
#define CONVSTA_1() GPIOD->BSRRL = GPIO_Pin_11
#define CONVSTA_0() GPIOD->BSRRH = GPIO_Pin_11
#define CONVSTB_1() GPIOB->BSRRL = GPIO_Pin_15
#define CONVSTB_0() GPIOB->BSRRH = GPIO_Pin_15
//PD12 RANGE
#define RANGE_1() GPIOD->BSRRL = GPIO_Pin_12
#define RANGE_0() GPIOD->BSRRH = GPIO_Pin_12
//AD_RESET PB14
#define RESET_1() GPIOB->BSRRL = GPIO_Pin_14
#define RESET_0() GPIOB->BSRRH = GPIO_Pin_14
//AD7606 FSMC总线地址，只能读，无需写
#define AD7606_RESULT() *(__IO uint16_t *)0x6C400000
AD7606_VAR_T g_tAD7606; //定义1个全局变量，保存一些参数
static void AD7606_CtrlLinesConfig(void);
static void AD7606_FSMCConfig(void);
/*------------------------------------------------------------------------------------------------------------------------------
*****-----功能介绍：AD7606初始化
*****-----函数名：AD7606_Init()
*****-----入口参数：无
*****-----返回值：无
*****-----备注：
------------------------------------------------------------------------------------------------------------------------------*/
void AD7606_Init(void)
{
AD7606_CtrlLinesConfig();
AD7606_FSMCConfig();
AD7606_SetOS(AD_OS_NO); //无过采样
AD7606_SetInputRange(0); //0表示输入量程为正负5V, 1表示正负10V
AD7606_Reset();
CONVSTB_1(); //启动转换的GPIO平时设置为高
}
/*------------------------------------------------------------------------------------------------------------------------------
*****-----功能介绍：配置AD7606控制口线，FSMC管脚设置为复用功能
*****-----函数名：AD7606_CtrlLinesConfig()
*****-----入口参数：无
*****-----返回值：无
*****-----备注：
------------------------------------------------------------------------------------------------------------------------------*/
static void AD7606_CtrlLinesConfig(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB3PeriphClockCmd(RCC_AHB3Periph_FSMC, ENABLE);/* 使能FSMC时钟 */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD | RCC_AHB1Periph_GPIOE | RCC_AHB1Periph_GPIOG, ENABLE);/* 使能 GPIO时钟 */
/* 设置 PD.00(D2), PD.01(D3), PD.04(NOE), PD.05(NWE), PD.08(D13), PD.09(D14),
PD.10(D15), PD.14(D0), PD.15(D1) 为复用推挽输出 */
GPIO_PinAFConfig(GPIOD, GPIO_PinSource0, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource1, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource4, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource5, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource8, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource9, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource10, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource14, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource15, GPIO_AF_FSMC);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_4 | GPIO_Pin_5 |
GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_14 |
GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOD, &GPIO_InitStructure);
/*
PE.07(D4), PE.08(D5), PE.09(D6), PE.10(D7), PE.11(D8), PE.12(D9), PE.13(D10),
PE.14(D11), PE.15(D12)
*/
GPIO_PinAFConfig(GPIOE, GPIO_PinSource7 , GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource8 , GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource9 , GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource10 , GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource11 , GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource12 , GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource13 , GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource14 , GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource15 , GPIO_AF_FSMC);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 |
GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 |
GPIO_Pin_15;
GPIO_Init(GPIOE, &GPIO_InitStructure);
/* 设置 PG12 为复用推挽输出 */
GPIO_PinAFConfig(GPIOG, GPIO_PinSource12, GPIO_AF_FSMC);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_Init(GPIOG, &GPIO_InitStructure);
/* 配置几个控制用的GPIO
PG4/DCMI_D0/AD7606_OS0 ---> AD7606_OS0 OS2:OS0 选择数字滤波参数
PG3/DCMI_D1/AD7606_OS1 ---> AD7606_OS1
PG2/DCMI_D2/AD7606_OS2 ---> AD7606_OS2
PD11/DCMI_D3/AD7606_CONVSTA ---> AD7606_CONVSTA 启动ADC转换CH1-CH4
PB15/DCMI_D3/AD7606_CONVSTB ---> AD7606_CONVSTB 启动ADC转换CH5-CH8
PD12/DCMI_D4/AD7606_RAGE ---> AD7606_RAGE 输入模拟电压量程，正负5V或正负10V
PB14/DCMI_D5/AD7606_RESET ---> AD7606_RESET 复位
PB13/DCMI_D6/AD7606_BUSY ---> AD7606_BUSY 转换结束的信号
*/
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);/* 使能 GPIO时钟 */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_3 | GPIO_Pin_2;
GPIO_Init(GPIOG, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_12;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
/*------------------------------------------------------------------------------------------------------------------------------
*****-----功能介绍：配置FSMC并口访问时序
*****-----函数名：AD7606_FSMCConfig()
*****-----入口参数：无
*****-----返回值：无
*****-----备注：
------------------------------------------------------------------------------------------------------------------------------*/
static void AD7606_FSMCConfig(void)
{
FSMC_NORSRAMInitTypeDef init;
FSMC_NORSRAMTimingInitTypeDef timing;
/*
AD7606规格书要求(3.3V时)：RD读信号低电平脉冲宽度最短21ns，高电平脉冲最短宽度15ns。
按照如下配置读数均正常。为了和同BANK的LCD配置相同，选择3-0-6-1-0-0
3-0-5-1-0-0 : RD高持续75ns，低电平持续50ns. 1us以内可读取8路样本数据到内存。
1-0-1-1-0-0 : RD高75ns，低电平执行12ns左右，下降沿差不多也12ns. 数据读取正确。
*/
/* FSMC_Bank1_NORSRAM4 configuration */
timing.FSMC_AddressSetupTime = 3;
timing.FSMC_AddressHoldTime = 0;
timing.FSMC_DataSetupTime = 6;
timing.FSMC_BusTurnAroundDuration = 1;
timing.FSMC_CLKDivision = 0;
timing.FSMC_DataLatency = 0;
timing.FSMC_AccessMode = FSMC_AccessMode_A;
/*
LCD configured as follow:
- Data/Address MUX = Disable
- Memory Type = SRAM
- Data Width = 16bit
- Write Operation = Enable
- Extended Mode = Enable
- Asynchronous Wait = Disable
*/
init.FSMC_Bank = FSMC_Bank1_NORSRAM4;
init.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable;
init.FSMC_MemoryType = FSMC_MemoryType_SRAM;
init.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;
init.FSMC_BurstAccessMode = FSMC_BurstAccessMode_Disable;
init.FSMC_AsynchronousWait = FSMC_AsynchronousWait_Disable;
init.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;
init.FSMC_WrapMode = FSMC_WrapMode_Disable;
init.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;
init.FSMC_WriteOperation = FSMC_WriteOperation_Enable;
init.FSMC_WaitSignal = FSMC_WaitSignal_Disable;
init.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable;
init.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
init.FSMC_ReadWriteTimingStruct = &timing;
init.FSMC_WriteTimingStruct = &timing;
FSMC_NORSRAMInit(&init);
/* - BANK 1 (of NOR/SRAM Bank 1~4) is enabled */
FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM4, ENABLE);
}
/*------------------------------------------------------------------------------------------------------------------------------
*****-----功能介绍：配置AD7606数字滤波器，也就设置过采样倍率。
*****-----函数名：AD7606_SetOS()
*****-----入口参数： _ucOS : 过采样倍率
*****-----返回值：无
*****-----备注：
通过设置 AD7606_OS0、OS1、OS2口线的电平组合状态决定过采样倍率。
启动AD转换之后，AD7606内部自动实现剩余样本的采集，然后求平均值输出。
过采样倍率越高，转换时间越长。
无过采样时，AD转换时间 4us;
2倍过采样时 = 8.7us;
4倍过采样时 = 16us
64倍过采样时 = 286us
------------------------------------------------------------------------------------------------------------------------------*/
void AD7606_SetOS(AD7606_OS_E _ucOS)
{
g_tAD7606.ucOS = _ucOS;
switch (_ucOS)
{
case AD_OS_X2:
OS2_0();
OS1_0();
OS0_1();
break;
case AD_OS_X4:
OS2_0();
OS1_1();
OS0_0();
break;
case AD_OS_X8:
OS2_0();
OS1_1();
OS0_1();
break;
case AD_OS_X16:
OS2_1();
OS1_0();
OS0_0();
break;
case AD_OS_X32:
OS2_1();
OS1_0();
OS0_1();
break;
case AD_OS_X64:
OS2_1();
OS1_1();
OS0_0();
break;
case AD_OS_NO:
default:
g_tAD7606.ucOS = AD_OS_NO;
OS2_0();
OS1_0();
OS0_0();
break;
}
}
/*------------------------------------------------------------------------------------------------------------------------------
*****-----功能介绍：配置AD7606模拟信号输入量程
*****-----函数名：AD7606_SetInputRange()
*****-----入口参数：ucRange : 0 表示正负5V 1表示正负10V
*****-----返回值：无
*****-----备注：
------------------------------------------------------------------------------------------------------------------------------*/
void AD7606_SetInputRange(uint8_t _ucRange)
{
if (_ucRange == 0)
{
g_tAD7606.ucRange = 0;
RANGE_0(); /* 设置为正负5V */
}
else
{
g_tAD7606.ucRange = 1;
RANGE_1(); /* 设置为正负10V */
}
}
/*------------------------------------------------------------------------------------------------------------------------------
*****-----功能介绍：硬件复位AD7606。复位之后恢复到正常工作状态
*****-----函数名：AD7606_Reset()
*****-----入口参数：无
*****-----返回值：无
*****-----备注：
------------------------------------------------------------------------------------------------------------------------------*/
void AD7606_Reset(void)
{
RESET_0(); /* 退出复位状态 */
RESET_1(); /* 进入复位状态 */
RESET_1(); /* 仅用于延迟。 RESET复位高电平脉冲宽度最小50ns。 */
RESET_1();
RESET_1();
RESET_0(); /* 退出复位状态 */
}
/*------------------------------------------------------------------------------------------------------------------------------
*****-----功能介绍：启动1次ADC转换
*****-----函数名：AD7606_StartConvst()
*****-----入口参数：无
*****-----返回值：无
*****-----备注：
------------------------------------------------------------------------------------------------------------------------------*/
void AD7606_StartConvst(void)
{
/* page 7： CONVST 高电平脉冲宽度和低电平脉冲宽度最短 25ns */
/* CONVST平时为高 */
CONVSTB_0();
CONVSTB_0();
CONVSTB_0();
CONVSTB_1();
}
/*------------------------------------------------------------------------------------------------------------------------------
*****-----功能介绍：读取8路采样结果。结果存储在全局变量 g_tAD7606
*****-----函数名：AD7606_ReadNowAdc()
*****-----入口参数：无
*****-----返回值：无
*****-----备注：
------------------------------------------------------------------------------------------------------------------------------*/
void AD7606_ReadNowAdc(void)
{
g_tAD7606.sNowAdc[0] = AD7606_RESULT(); /* 读第1路样本 */
g_tAD7606.sNowAdc[1] = AD7606_RESULT(); /* 读第2路样本 */
g_tAD7606.sNowAdc[2] = AD7606_RESULT(); /* 读第3路样本 */
g_tAD7606.sNowAdc[3] = AD7606_RESULT(); /* 读第4路样本 */
g_tAD7606.sNowAdc[4] = AD7606_RESULT(); /* 读第5路样本 */
g_tAD7606.sNowAdc[5] = AD7606_RESULT(); /* 读第6路样本 */
g_tAD7606.sNowAdc[6] = AD7606_RESULT(); /* 读第7路样本 */
g_tAD7606.sNowAdc[7] = AD7606_RESULT(); /* 读第8路样本 */
}

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