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Forum Index : Microcontroller and PC projects : Looking for code for MCP3208 8 channel ADC with SPI interface
| Author | Message | ||||
karlelch Senior Member  Joined: 30/10/2014 Location: GermanyPosts: 172 |
Dear all, Does someone have code to access the MCP3208 chip via SPI from MMBasic? Thanks! |
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| oh3gdo Regular Member  Joined: 18/11/2021 Location: FinlandPosts: 47 |
karleich I found CCS c-language code for MCP3208 // olympic++ adc de-noising routine for 10 or 12 bit ADC values // NOTE: you must have selected the desired ADC channel before calling // reads 16x , sorts and tosses low4 && high 4 readings // then averages the middle 8 unsigned int16 adchlx(void){ // read 16 - sort, keep middle 8 average unsigned int8 i; unsigned int16 accum=0; unsigned int16 s, b[16]; int1 didswap=1; for ( i = 0 ; i < 16; i++ ) { b[i]= read_adc(ADC_start_and_read); // ADC set for 10 or 12 bits delay_us(8); } // end of for loop for multi sample while(didswap){ // bubble sort didswap=0; for (i=0; i<15; i++){ // i 0-15 if(b[(i)]>b[(i+1)]){ // if low element greater than next -do swap s=b[i]; // hold upper b[i]=b[(1+i)]; b[(1+i)]=s; didswap=1; } // ~if } // ~for } // ~while // now sort and keep middle 8 values for (i=4; i<12; i++){ accum +=b[i]; } return(accum>>3); } I think it is not too difficult to change it to MMBASIC The place is https://www.ccsinfo.com/forum/viewtopic.php?t=50320&highlight=mcp3208 Pekka Ritamaki |
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| zeitfest Guru  Joined: 31/07/2019 Location: AustraliaPosts: 482 |
maybe tweak the Basic examples here ( https://microcontrollershop.com/download/adc_examples.zip?osCsid=abnttkhk7ndtssls53d5vimaf4 ) Edited 2023-12-11 19:04 by zeitfest |
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| karlelch Senior Member Joined: 30/10/2014 Location: GermanyPosts: 172 |
Thanks @oh3gdo - I did find C code, too, but for some reason failed to adapt it to MMBasic, specifically the SPI communication. Thanks @zeitfest - I’ll have a closer look. |
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