frederic blanc
onewire 1-wire ds18x20 ds2450 multi-channel
Diff: DS2450.c
- Revision:
- 0:8c4e1841eb30
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/DS2450.c Fri Mar 02 08:29:49 2012 +0000
@@ -0,0 +1,464 @@
+/**
+* @file DS2450.c
+* @brief library of DS2450 1-Wire Quad A/D Converter (http://www.maxim-ic.com/datasheet/index.mvp/id/2921)
+* @author Frederic BLANC (Published 01/03/2012 www.mbed.org)
+*/
+#include "mbed.h"
+#include "onewire.h"
+#include "DS2450.h"
+#include "crc8.h"
+#include "crc16.h"
+#include "utils.h"
+//**********************************************************************************************************
+//* DS2450_read_ADC
+//**********************************************************************************************************
+
+/**
+ * @brief lancement lecture DS2450 ADC
+ * @param [in] id[] tableau d'identifiant OW
+ * @param [out] adc[] tableau des valeurs des adc
+ * @return OW_OK si erreur retourne OW_ERROR_CRC
+ * @date 20/06/2011
+ *
+ */
+uint8_t DS2450_read_ADC(uint8_t id[], uint16_t adc[]) {
+ uint8_t i,j;
+ uint8_t error;
+ uint8_t sp[DS2450_SP_SIZE];
+ //waiting for convertion time ( nbchannel x resolution x 80�s +160�s)
+
+ error=DS2450_read_page(&id[0],DS2450_PAGE0,&sp[0]); //read data
+ if (error)
+ return error;
+ j=0;
+ for (i=0;i<8;i+=2)
+ adc[j++]=uint8_to_uint16(sp[i+3],sp[i+4]); //sp[i+3] LSB ,sp[i+4] MSB
+ return OW_OK;
+}
+
+
+/**
+ * @brief lancement lecture DS2450 ADC
+ * @param [in] n num bus onewire
+ * @param [in] id[] tableau d'identifiant OW
+ * @param [out] adc[] tableau des valeurs des adc
+ * @return OW_OK si erreur retourne OW_ERROR_CRC
+ * @date 07/09/2011
+ *
+ */
+uint8_t DS2450_read_ADC(uint8_t n,uint8_t id[], uint16_t adc[]) {
+ uint8_t i,j;
+ uint8_t error;
+ uint8_t sp[DS2450_SP_SIZE];
+ //waiting for convertion time ( nbchannel x resolution x 80�s +160�s)
+
+ error=DS2450_read_page(n,&id[0],DS2450_PAGE0,&sp[0]); //read data
+ if (error)
+ return error;
+ j=0;
+ for (i=0;i<8;i+=2)
+ adc[j++]=uint8_to_uint16(sp[i+3],sp[i+4]); //sp[i+3] LSB ,sp[i+4] MSB
+ return OW_OK;
+}
+//**********************************************************************************************************
+//* DS2450_start_and_read_ADC
+//**********************************************************************************************************
+
+/**
+ * @brief lancement & lecture DS2450 ADC
+ * @param [in] id[] tableau d'identifiant OW
+ * @param [out] adc[] tableau des valeurs des adc
+ * @return OW_OK si erreur retourne OW_ERROR_CRC
+ * @date 20/06/2011
+ *
+ */
+uint8_t DS2450_start_and_read_ADC(uint8_t id[], uint16_t adc[]) {
+ uint8_t i,j;
+ uint8_t error;
+ uint8_t sp[DS2450_SP_SIZE];
+
+ error=DS2450_convert(&id[0],0x0F,0x00); //start convert
+ if (error)
+ return error;
+
+ wait_ms(15); //waiting for convertion time ( nbchannel x resolution x 80�s +160�s)
+
+ error=DS2450_read_page(&id[0],DS2450_PAGE0,&sp[0]); //read data
+ if (error)
+ return error;
+
+ j=0;
+ for (i=0;i<8;i+=2)
+ adc[j++]=uint8_to_uint16(sp[i+3],sp[i+4]); //sp[i+3] LSB ,sp[i+4] MSB
+ return OW_OK;
+}
+
+/**
+ * @brief lancement & lecture DS2450 ADC
+ * @param [in] n num bus onewire
+ * @param [in] id[] tableau d'identifiant OW
+ * @param [out] adc[] tableau des valeurs des adc
+ * @return OW_OK si erreur retourne OW_ERROR_CRC
+ * @date 07/09/2011
+ *
+ */
+uint8_t DS2450_start_and_read_ADC(uint8_t n,uint8_t id[], uint16_t adc[]) {
+ uint8_t i,j;
+ uint8_t error;
+ uint8_t sp[DS2450_SP_SIZE];
+
+ error=DS2450_convert(n,&id[0],0x0F,0x00); //start convert
+ if (error)
+ return error;
+
+ wait_ms(15); //waiting for convertion time ( nbchannel x resolution x 80�s +160�s)
+
+ error=DS2450_read_page(n,&id[0],DS2450_PAGE0,&sp[0]); //read data
+ if (error)
+ return error;
+
+ j=0;
+ for (i=0;i<8;i+=2)
+ adc[j++]=uint8_to_uint16(sp[i+3],sp[i+4]); //sp[i+3] LSB ,sp[i+4] MSB
+ return OW_OK;
+}
+
+//**********************************************************************************************************
+//* DS2450_read_page
+//**********************************************************************************************************
+
+/**
+ * @brief lancement lecture page DS2450 ADC
+ * @param [in] id[] tableau d'identifiant OW
+ * @param [in] adresse de la page a lire
+ * @param [out] uint16_t sp tableau des valeurs de la page
+ * @return OW_OK si erreur retourne OW_ERROR_CRC
+ * @date 20/06/2011
+ *
+ */
+uint8_t DS2450_read_page(uint8_t id[], uint8_t adresse,
+ uint8_t *sp) {
+ uint8_t i;
+ if (id[0] == DS2450_ID) {
+ if (ow_reset()) //reset OW
+ return OW_SHORT_CIRCUIT;
+ sp[0]=DS2450_READ_MEMORY; // command
+ sp[1]=adresse; //adress page LSB
+ sp[2]=0; //adress page MSB
+ ow_command(sp[0], &id[0]);
+ ow_byte_wr(sp[1]);
+ ow_byte_wr(sp[2]);
+
+ for ( i=3 ; i< DS2450_SP_SIZE; i++ ) { //read 8xdata + CRC16
+ sp[i]=ow_byte_rd();
+ }
+
+ if (ctrl_crc16( &sp[0], DS2450_SP_SIZE ) ) { //CRC16 (command+adress page LSB+adress page MSB+8xdata)
+ wait_ms(100); //wait 100ms if error
+ if ((sp[DS2450_SP_SIZE-1]==0xFF) && (sp[DS2450_SP_SIZE-2]==0xFF))
+ return OW_ERROR; // bus error
+ if ((sp[DS2450_SP_SIZE-1]==0x00) && (sp[DS2450_SP_SIZE-2]==0x00))
+ return OW_BUSY;
+
+ return OW_ERROR_CRC; // data error
+ }
+ return OW_OK;
+ }
+ return OW_ERROR_BAD_ID;
+}
+/**
+ * @brief lancement lecture page DS2450 ADC
+ * @param [in] n num bus onewire
+ * @param [in] id[] tableau d'identifiant OW
+ * @param [in] adresse de la page a lire
+ * @param [out] sp tableau des valeurs de la page
+ * @return OW_OK si erreur retourne OW_ERROR_CRC
+ * @date 07/09/2011
+ *
+ */
+uint8_t DS2450_read_page(uint8_t n,uint8_t id[], uint8_t adresse,
+ uint8_t *sp) {
+ uint8_t i;
+ if (id[0] == DS2450_ID) {
+ if (ow_reset(n)) //reset OW
+ return OW_SHORT_CIRCUIT;
+ sp[0]=DS2450_READ_MEMORY; // command
+ sp[1]=adresse; //adress page LSB
+ sp[2]=0; //adress page MSB
+ ow_command(n,sp[0], &id[0]);
+ ow_byte_wr(n,sp[1]);
+ ow_byte_wr(n,sp[2]);
+
+ for ( i=3 ; i< DS2450_SP_SIZE; i++ ) { //read 8xdata + CRC16
+ sp[i]=ow_byte_rd(n);
+ }
+
+ if (ctrl_crc16( &sp[0], DS2450_SP_SIZE ) ) { //CRC16 (command+adress page LSB+adress page MSB+8xdata)
+ wait_ms(100); //wait 100ms if error
+ if ((sp[DS2450_SP_SIZE-1]==0xFF) && (sp[DS2450_SP_SIZE-2]==0xFF))
+ return OW_ERROR; // bus error
+ if ((sp[DS2450_SP_SIZE-1]==0x00) && (sp[DS2450_SP_SIZE-2]==0x00))
+ return OW_BUSY;
+
+ return OW_ERROR_CRC; // data error
+ }
+ return OW_OK;
+ }
+ return OW_ERROR_BAD_ID;
+}
+//**********************************************************************************************************
+//* DS2450_convert
+//**********************************************************************************************************
+
+/**
+ * @brief lancement convertion DS2450 ADC
+ * @param [in] uint8_t id[] tableau d'identifiant OW
+ * @param [in] uint8_t input_select_mask
+ * @param [in] uint8_t read_out_control
+ * @return OW_OK si erreur retourne OW_ERROR_CRC
+ * @date 20/06/2011
+ *
+ */
+uint8_t DS2450_convert(uint8_t id[], uint8_t input_select_mask,uint8_t read_out_control) {
+ uint8_t i;
+ uint8_t sp[5];
+ if (id[0] == DS2450_ID) {
+ if (ow_reset()) //reset OW
+ return OW_SHORT_CIRCUIT;
+ sp[0]=DS2450_CONVERT; // command
+ sp[1]=input_select_mask; //mask
+ sp[2]=read_out_control; //control
+ ow_command(sp[0], &id[0]);
+ ow_byte_wr(sp[1]);
+ ow_byte_wr(sp[2]);
+ for ( i=3 ; i< 5; i++ ) { // read CRC16
+ sp[i]=ow_byte_rd();
+ }
+
+ if (ctrl_crc16( &sp[0], 5 ) ) { //CRC16 (command+mask LSB+control)
+ if ((sp[3]==0xFF) && (sp[3]==0xFF))
+ return OW_ERROR;
+ return OW_ERROR_CRC;
+ }
+ return OW_OK;
+ }
+ return OW_ERROR_BAD_ID;
+}
+/**
+ * @brief lancement convertion DS2450 ADC
+ * @param [in] n num bus onewire
+ * @param [in] uint8_t id[] tableau d'identifiant OW
+ * @param [in] uint8_t input_select_mask
+ * @param [in] uint8_t read_out_control
+ * @return OW_OK si erreur retourne OW_ERROR_CRC
+ * @date 07/09/2011
+ *
+ */
+uint8_t DS2450_convert(uint8_t n,uint8_t id[], uint8_t input_select_mask,uint8_t read_out_control) {
+ uint8_t i;
+ uint8_t sp[5];
+ if (id[0] == DS2450_ID) {
+ if (ow_reset(n)) //reset OW
+ return OW_SHORT_CIRCUIT;
+ sp[0]=DS2450_CONVERT; // command
+ sp[1]=input_select_mask; //mask
+ sp[2]=read_out_control; //control
+ ow_command(n,sp[0], &id[0]);
+ ow_byte_wr(n,sp[1]);
+ ow_byte_wr(n,sp[2]);
+ for ( i=3 ; i< 5; i++ ) { // read CRC16
+ sp[i]=ow_byte_rd(n);
+ }
+
+ if (ctrl_crc16( &sp[0], 5 ) ) { //CRC16 (command+mask LSB+control)
+ if ((sp[3]==0xFF) && (sp[3]==0xFF))
+ return OW_ERROR;
+ return OW_ERROR_CRC;
+ }
+ return OW_OK;
+ }
+ return OW_ERROR_BAD_ID;
+}
+
+//**********************************************************************************************************
+//* DS2450_configure_channel_ADC
+//**********************************************************************************************************
+
+/**
+ * @brief configure canal ADC DS2450
+ * @param [in] id[] tableau d'identifiant OW
+ * @param [in] channel
+ * @param [in] conflsb configuration OE-A OC-A 0 0 RC3-A RC2-A RC1-A RC0-A
+ * @param [in] confmsb configuration POR 0 AFH-A AFL-A AEH-A AEL-A 0 IR-A
+ * @return OW_OK si erreur retourne OW_ERROR_CRC
+ * @date 20/06/2011
+ *
+ */
+uint8_t DS2450_configure_channel_ADC(uint8_t id[],uint8_t channel,uint8_t conflsb,uint8_t confmsb) {
+ uint8_t i;
+ uint8_t sp[7];
+ if (id[0] == DS2450_ID) {
+ if (ow_reset()) //reset OW
+ return OW_SHORT_CIRCUIT;
+ sp[0]=DS2450_WRITE_MEMORY; // command
+ sp[1]=DS2450_PAGE1+channel; //adress page LSB
+ sp[2]=0x00; //adress page MSB
+ sp[3]=conflsb; //databyte
+ ow_command(sp[0], &id[0]);
+ ow_byte_wr(sp[1]);
+ ow_byte_wr(sp[2]);
+ ow_byte_wr(sp[3]);
+ for ( i=4 ; i< 7; i++ ) { //read CRC16+databyte
+ sp[i]=ow_byte_rd();
+ }
+
+ if (ctrl_crc16( &sp[0], 6 ) ) //CRC16 (command+adress page LSB+adress page MSB+databyte)
+ return OW_ERROR_CRC;
+ sp[3]=confmsb; //databyte
+ ow_byte_wr(sp[3]);
+ for ( i=4 ; i< 7; i++ ) { //read CRC16+databyte
+ sp[i]=ow_byte_rd();
+ }
+
+ if (sp[3]!=sp[6] ) //control data
+ return OW_ERROR_CRC;
+ return OW_OK;
+ }
+ return OW_ERROR_BAD_ID;
+}
+/**
+ * @brief configure canal ADC DS2450
+ * @param [in] n num bus onewire
+ * @param [in] id[] tableau d'identifiant OW
+ * @param [in] channel
+ * @param [in] conflsb configuration OE-A OC-A 0 0 RC3-A RC2-A RC1-A RC0-A
+ * @param [in] confmsb configuration POR 0 AFH-A AFL-A AEH-A AEL-A 0 IR-A
+ * @return OW_OK si erreur retourne OW_ERROR_CRC
+ * @date 20/06/2011
+ *
+ */
+uint8_t DS2450_configure_channel_ADC(uint8_t n,uint8_t id[],uint8_t channel,uint8_t conflsb,uint8_t confmsb) {
+ uint8_t i;
+ uint8_t sp[7];
+ if (id[0] == DS2450_ID) {
+ if (ow_reset(n)) //reset OW
+ return OW_SHORT_CIRCUIT;
+ sp[0]=DS2450_WRITE_MEMORY; // command
+ sp[1]=DS2450_PAGE1+channel; //adress page LSB
+ sp[2]=0x00; //adress page MSB
+ sp[3]=conflsb; //databyte
+ ow_command(n,sp[0], &id[0]);
+ ow_byte_wr(n,sp[1]);
+ ow_byte_wr(n,sp[2]);
+ ow_byte_wr(n,sp[3]);
+ for ( i=4 ; i< 7; i++ ) { //read CRC16+databyte
+ sp[i]=ow_byte_rd(n);
+ }
+
+ if (ctrl_crc16( &sp[0], 6 ) ) //CRC16 (command+adress page LSB+adress page MSB+databyte)
+ return OW_ERROR_CRC;
+ sp[3]=confmsb; //databyte
+ ow_byte_wr(n,sp[3]);
+ for ( i=4 ; i< 7; i++ ) { //read CRC16+databyte
+ sp[i]=ow_byte_rd(n);
+ }
+
+ if (sp[3]!=sp[6] ) //control data
+ return OW_ERROR_CRC;
+ return OW_OK;
+ }
+ return OW_ERROR_BAD_ID;
+}
+//**********************************************************************************************************
+//* DS2450_configure_channel_ADC
+//**********************************************************************************************************
+
+/**
+ * @brief configure PAGE
+ * @param [in] id[] tableau d'identifiant OW
+ * @param [in] uint8_t adresse de la page a ecrire
+ * @param [in] config_page tableau de 8 byte
+ * @return OW_OK si erreur retourne OW_ERROR_CRC
+ * @date 20/06/2011
+ *
+ */
+uint8_t DS2450_configure_page(uint8_t id[], uint8_t adresse,uint8_t configpage[]) {
+ uint8_t i,j;
+ uint8_t sp[7];
+ if (id[0] == DS2450_ID) {
+ if (ow_reset()) //reset OW
+ return OW_SHORT_CIRCUIT;
+ sp[0]=DS2450_WRITE_MEMORY; // command
+ sp[1]=adresse; //adress page LSB
+ sp[2]=0x00; //adress page MSB
+ sp[3]=configpage[0]; //databyte
+ ow_command(sp[0], &id[0]);
+ ow_byte_wr(sp[1]);
+ ow_byte_wr(sp[2]);
+ ow_byte_wr(sp[3]);
+ for ( i=4 ; i< 7; i++ ) { //read CRC16+databyte
+ sp[i]=ow_byte_rd();
+ }
+
+ if (sp[3]!=sp[6] ) //control data
+ return OW_ERROR_CRC;
+
+ for ( j=1 ; j< 7; j++ ) {
+ sp[3]=configpage[j]; //databyte
+ ow_byte_wr(sp[3]);
+ for ( i=4 ; i< 7; i++ ) { //read CRC16+databyte
+ sp[i]=ow_byte_rd();
+ }
+ if (sp[3]!=sp[6] ) //control data
+ return OW_ERROR_CRC;
+
+ }
+ return OW_OK;
+ }
+ return OW_ERROR_BAD_ID;
+}
+/**
+ * @brief configure PAGE
+ * @param [in] n num bus onewire
+ * @param [in] id[] tableau d'identifiant OW
+ * @param [in] uint8_t adresse de la page a ecrire
+ * @param [in] config_page tableau de 8 byte
+ * @return OW_OK si erreur retourne OW_ERROR_CRC
+ * @date 07/09/2011
+ *
+ */
+uint8_t DS2450_configure_page(uint8_t n,uint8_t id[], uint8_t adresse,uint8_t configpage[]) {
+ uint8_t i,j;
+ uint8_t sp[7];
+ if (id[0] == DS2450_ID) {
+ if (ow_reset(n)) //reset OW
+ return OW_SHORT_CIRCUIT;
+ sp[0]=DS2450_WRITE_MEMORY; // command
+ sp[1]=adresse; //adress page LSB
+ sp[2]=0x00; //adress page MSB
+ sp[3]=configpage[0]; //databyte
+ ow_command(n,sp[0], &id[0]);
+ ow_byte_wr(n,sp[1]);
+ ow_byte_wr(n,sp[2]);
+ ow_byte_wr(n,sp[3]);
+ for ( i=4 ; i< 7; i++ ) { //read CRC16+databyte
+ sp[i]=ow_byte_rd(n);
+ }
+
+ if (sp[3]!=sp[6] ) //control data
+ return OW_ERROR_CRC;
+
+ for ( j=1 ; j< 7; j++ ) {
+ sp[3]=configpage[j]; //databyte
+ ow_byte_wr(n,sp[3]);
+ for ( i=4 ; i< 7; i++ ) { //read CRC16+databyte
+ sp[i]=ow_byte_rd(n);
+ }
+ if (sp[3]!=sp[6] ) //control data
+ return OW_ERROR_CRC;
+
+ }
+ return OW_OK;
+ }
+ return OW_ERROR_BAD_ID;
+}
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