Ti的DAC8552、DAC8554驱动程序

/** ****************************************************************************** * @file bsp_dac8552.c * @author 张超凡 * @version V1.0 * @date * @brief DAC8552驱动程序 * */ /*******************************调试信息************************************************* * 模拟了三个spi通信。一红有6个通道，编号从 0-5 。 * 为保证输出的精度，有两种办法：1、用最小二乘法拟合直线。2、用分段线性插值。 * * * 增加了延时 * * * *******************************************************************************/ #include "stm32f4xx.h" #include "bsp_dac8552.h" #include "stm32f4xx_conf.h" #include "delay.h" static void DAC8552_0_SPI_Write( unsigned int code); static void DAC8552_1_SPI_Write( unsigned int code); static void DAC8552_2_SPI_Write( unsigned int code); static void DAC8552_delay(void); void DAC8552_Init() { unsigned char i = 0; GPIO_InitTypeDef GPIO_InitStructure; DAC8552_RCC_GPIOClockCmd(); //使能端口引脚端口时钟 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Pin = DAC8552_0_SYNC_Pin ; // 端口配置 GPIO_Init(DAC8552_0_SYNC_Port, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = DAC8552_0_SCLK_Pin; GPIO_Init(DAC8552_0_SCLK_Port, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = DAC8552_0_DIN_Pin; GPIO_Init(DAC8552_0_DIN_Port, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = DAC8552_1_SYNC_Pin ; // 端口配置 GPIO_Init(DAC8552_1_SYNC_Port, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = DAC8552_1_SCLK_Pin; GPIO_Init(DAC8552_1_SCLK_Port, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = DAC8552_1_DIN_Pin; GPIO_Init(DAC8552_1_DIN_Port, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = DAC8552_2_SYNC_Pin ; // 端口配置 GPIO_Init(DAC8552_2_SYNC_Port, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = DAC8552_2_SCLK_Pin; GPIO_Init(DAC8552_2_SCLK_Port, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = DAC8552_2_DIN_Pin; GPIO_Init(DAC8552_2_DIN_Port, &GPIO_InitStructure); for(i = 0;i <5;i ++) { DAC8552_SetVoltage(i,0); } } static void DAC8552_delay(void) { int x = 10; while(--x); } void DAC8552_SetVoltage( unsigned char channel,unsigned int code) //通道一共6个（0-5），一个芯片有两个通道 data是一个24位的数据,STM32中int型是32位的数据 { unsigned int data = 0; unsigned char chip; if( code > 65535 | channel > 5) return ; chip = channel >> 1; (channel%2 == 0) ? (data = 0x100000 | code) : (data = 0x240000 | code) ; //通道有 chip0 : 0 1 chip1 : 2 3 chip2 : 4 5 偶数通道0 奇数通道一 switch( chip) { case 0 : { DAC8552_0_SPI_Write(data); break; } case 1 : { DAC8552_1_SPI_Write(data); break; } case 2 : { DAC8552_2_SPI_Write(data); break; } } } static void DAC8552_1_SPI_Write( unsigned int code) { char i=0; unsigned int data = code; DAC8552_1_SYNC = 1; DAC8552_delay();//SYNC脚一个高脉冲 DAC8552_1_SYNC = 0; for( i=0; i<24; i++ ) { if((data&0x800000) == 0x800000) DAC8552_1_DIN = 1; else DAC8552_1_DIN = 0; DAC8552_1_SCLK = 1; DAC8552_delay(); DAC8552_1_SCLK = 0; data=data<<1; DAC8552_delay(); } } static void DAC8552_0_SPI_Write( unsigned int code) { char i=0; unsigned int data = code; DAC8552_0_SYNC = 1; DAC8552_delay();//SYNC脚一个高脉冲 DAC8552_0_SYNC = 0; for( i=0; i<24; i++ ) { if((data&0x800000) == 0x800000) DAC8552_0_DIN = 1; else DAC8552_0_DIN = 0; DAC8552_0_SCLK = 1; DAC8552_delay(); DAC8552_0_SCLK = 0; data=data<<1; DAC8552_delay(); } } static void DAC8552_2_SPI_Write( unsigned int code) { char i=0; unsigned int data = code; DAC8552_2_SYNC = 1; DAC8552_delay();//SYNC脚一个高脉冲 DAC8552_2_SYNC = 0; for( i=0; i<24; i++ ) { if((data&0x800000) == 0x800000) DAC8552_2_DIN = 1; else DAC8552_2_DIN = 0; DAC8552_2_SCLK = 1; DAC8552_delay(); DAC8552_2_SCLK = 0; data=data<<1; DAC8552_delay(); } }