dac5628.rar

/* dac5628.C file * * Copyright (c) 2002-2005 STMicroelectronics */ #include "STM8S207R.h" #include "STM8S207R8.h" #include "config.h" #include "dac5628.h" extern strdefRun_Inf pRun_Inf; extern strdefDAC pDAC; extern strdefEEPROM pEE; extern unsigned char para_chan_sta[NUMBER_OF_CHANNELS]; /******************************************************************************* * @函数名称 SoftDelay * @函数说明 软延时函数 * @输入参数 Cycles * @输出参数 无 * @返回参数 无 *****************************************************************************/ void SoftDelay(unsigned int Cycles) { unsigned int TempWord1; for (TempWord1 = 0; TempWord1 < Cycles; TempWord1++); } /******************************************************************************* * @函数名称 output * @函数说明 通道输出函数 * @输入参数 channel * @输出参数 无 * @返回参数 无 *****************************************************************************/ void output(unsigned char channel) { float temp; float temp1; if(channel > 7) return; if(((pDAC.output_data[channel] > 32767) && (pDAC.output_data[channel] < 65035 ))||(pDAC.output_data[channel] < 10500)) { para_chan_sta[channel] = 0; if(pDAC.output_data[channel] > 32767) { temp = pDAC.output_data[channel] - 65536; } else { temp = pDAC.output_data[channel]; } temp1 = (float)(pEE.EE_data_h[channel]-pEE.EE_data_l[channel]); temp = (temp / 10000) * temp1; temp = temp + (float)pEE.EE_data_l[channel]; DACStart(temp, channel); } else { para_chan_sta[channel] = 1; } } /******************************************************************************* * @函数名称 DACReg_Init * @函数说明 DAC寄存器初始化函数 * @输入参数 DACValue * @输出参数 无 * @返回参数 无 *****************************************************************************/ void DACReg_Init(unsigned long DACValue) { unsigned long TempWord = DACValue; unsigned char TempByte; Write_singleIO(SYNC_PORTX, SYNC_PORT_NUMBER, LOW_LEVEL); SoftDelay(1); // Write DAC data. for (TempByte = 0; TempByte < 32; TempByte++) { if (0x80000000 & TempWord) { Write_singleIO(DIN_PORTX, DIN_PORT_NUMBER, HIGH_LEVEL); } else { Write_singleIO(DIN_PORTX, DIN_PORT_NUMBER, LOW_LEVEL); } SoftDelay(0); Write_singleIO(SCLK_PORTX, SCLK_PORT_NUMBER, HIGH_LEVEL); SoftDelay(0); //9ns Write_singleIO(SCLK_PORTX, SCLK_PORT_NUMBER, LOW_LEVEL); SoftDelay(0); //9ns TempWord <<= 1; } SoftDelay(0); Write_singleIO(SYNC_PORTX, SYNC_PORT_NUMBER, HIGH_LEVEL); SoftDelay(4); //20ns } /******************************************************************************* * @函数名称 DACStart * @函数说明 DA转换函数 * @输入参数 DACValue，DACCh * @输出参数 无 * @返回参数 无 *****************************************************************************/ void DACStart(unsigned int DACValue, unsigned char DACCh) { unsigned long TempWord = 0x00000000; unsigned char TempByte; unsigned char Channel[8] = {0, 2, 4, 6, 7, 5, 3, 1}; // Calculate data for DAC chip. TempWord += 0x03; // command 4bit 向通道写数据 TempWord <<= 4; TempWord += (Channel[DACCh]); // address 4bit TempWord <<= 12; TempWord += (DACValue); // DATA 12bit TempWord <<= 8; //8bit free Write_singleIO(SYNC_PORTX, SYNC_PORT_NUMBER, LOW_LEVEL); SoftDelay(1); // Write DAC data. for (TempByte = 0; TempByte < 32; TempByte++) { if (0x80000000 & TempWord) { Write_singleIO(DIN_PORTX, DIN_PORT_NUMBER, HIGH_LEVEL); } else { Write_singleIO(DIN_PORTX, DIN_PORT_NUMBER, LOW_LEVEL); } //SoftDelay(0); Write_singleIO(SCLK_PORTX, SCLK_PORT_NUMBER, HIGH_LEVEL); //SoftDelay(0); //9ns Write_singleIO(SCLK_PORTX, SCLK_PORT_NUMBER, LOW_LEVEL); //SoftDelay(0); //9ns TempWord <<= 1; } //SoftDelay(0); Write_singleIO(SYNC_PORTX, SYNC_PORT_NUMBER, HIGH_LEVEL); //SoftDelay(0); }