MAX1416驱动代码

/* *********************************************************************************** * Innov-Tech * Baohe Tunxi Road HF * HeFei, 230009 * China * * (c) Copyright Alexander.Schu, Innov-Tech, HeFei * * All rights reserved. Innov-Tech¡¯s source code is an unpublished work and the * use of a copyright notice does not imply otherwise. This source code contains * confidential, trade secret material of Innov-Tech. Any attempt or participation * in deciphering, decoding, reverse engineering or in any way altering the source * code is strictly prohibited, unless the prior written consent of Innov-Tech * is obtained. * * Filename : max1416.c * Programmer(s): Alexander.Schu(CN) * Modified : 2009/08/08 * Description : *********************************************************************************** */ //#include "project.h" /* // ------ Register Macro ------ // #define CMM_R 0x00 // communication register,bidirectional,write to it to initial your operations #define SET_R 0x10 // setup register,bidirectional,write to it to config your conversion #define CLK_R 0x20 // clock register,bidirectional,write to it to config your conversion clock #define DAT_R 0x30 // data register,read only,16 bits,hold the result of conversion #define TST_R 0x40 // test register #define OFS_R 0x60 // offset register #define GAN_R 0x70 // gain register // ------ Extern Functions ------ // extern void MAX1416Init (void); // MAX1416 initial funcation extern void MAX1416WrCmd (unsigned char reg_addr, unsigned char op_mod, unsigned char chip); // write cmd to MAX1416,to select the very register on the very chip,config operation extern void MAX1416WrDat (unsigned char dat, unsigned char chip); // write data to MAX1416 extern unsigned int MAX1416RdDat (unsigned char reg_type, unsigned char chip); // read data from MAX1416,select the right register extern void MAX1416WrByte(unsigned char dat); // write one byte,it's the basic write operation */ /*-=================================================-*\ * * Name : MAX1416WrByte * Argument : unsigned char dat * Return : None * Description £ºwrite a byte data to max1416 * \*-=================================================-*/ void MAX1416WrByte(unsigned char dat) { unsigned char index_i; for (index_i = 0; index_i < 8; index_i++) { CLK = 0; if (dat & 0x80) DIN = 1; else DIN = 0; dat <<= 1; CLK = 1; } } /*-=================================================-*\ * * Name : MAX1416WrDat * Argument : unsigned char dat * unsigned char chip * Return : None * Description £ºwrite the "dat" to the very "chip" * \*-=================================================-*/ void MAX1416WrDat(unsigned char dat, unsigned char chip) { switch (chip) { case 1: MAX1416_CS_1 = 0; break; case 2: MAX1416_CS_2 = 0; break; case 3: MAX1416_CS_3 = 0; break; case 4: MAX1416_CS_4 = 0; break; default: break; } MAX1416WrByte(dat); switch (chip) { case 1: MAX1416_CS_1 = 1; break; case 2: MAX1416_CS_2 = 1; break; case 3: MAX1416_CS_3 = 1; break; case 4: MAX1416_CS_4 = 1; break; default: break; } } /*-=================================================-*\ * * Name : MAX1416WrDat * Argument : unsigned char reg_type * unsigned char chip * Return : unsigned int * Description £ºread dat from the register of the * right chip * \*-=================================================-*/ unsigned int MAX1416RdDat(unsigned char reg_type, unsigned char chip) { unsigned char index_i; unsigned int dat; dat = 0x0000; if (DAT_R == reg_type) index_i = 16; else index_i = 8; switch (chip) { case 1: MAX1416_CS_1 = 0; break; case 2: MAX1416_CS_2 = 0; break; case 3: MAX1416_CS_3 = 0; break; case 4: MAX1416_CS_4 = 0; break; default: break; } /* first notch,must have this notch for the start flag */ CLK = 1; ; ; ; CLK = 0; ; ; ; CLK = 1; for (; index_i > 0; index_i--) { CLK = 1; dat <<= 1; dat |= MAX1416_DOUT; CLK = 0; } switch (chip) { case 1: MAX1416_CS_1 = 1; break; case 2: MAX1416_CS_2 = 1; break; case 3: MAX1416_CS_3 = 1; break; case 4: MAX1416_CS_4 = 1; break; default: break; } return (dat); } /*-=================================================-*\ * * Name : MAX1416WrCmd * Argument : unsigned char reg_addr * unsigned char op_mod * unsigned char chip * Return : None * Description £ºwrite a cmd to the communication reg * -ister on the right "chip",and config * the operation modle of the next regis * -ter. * op_mod == 1,for "read" * op_mod == 0,for "write" * \*-=================================================-*/ void MAX1416WrCmd(unsigned char reg_addr, unsigned char op_mod, unsigned char chip) { unsigned char operation; unsigned char cmd; if (1 == op_mod) operation = 0x08; else operation = 0x00; cmd = (operation | reg_addr); switch (chip) { case 1: MAX1416_CS_1 = 0; break; case 2: MAX1416_CS_2 = 0; break; case 3: MAX1416_CS_3 = 0; break; case 4: MAX1416_CS_4 = 0; break; default: break; } MAX1416WrByte(cmd); switch (chip) { case 1: MAX1416_CS_1 = 1; break; case 2: MAX1416_CS_2 = 1; break; case 3: MAX1416_CS_3 = 1; break; case 4: MAX1416_CS_4 = 1; break; default: break;