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sifirzero1
Joined: 14 Dec 2022
Posts: 43
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| ccs c book |
 Posted: Wed Jan 04, 2023 2:21 pm |
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sifirzero1
Joined: 14 Dec 2022
Posts: 43
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| Posted: Wed Jan 04, 2023 2:22 pm |
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Who has the book on this site? Would you sell or gift the book? thanks
http://janniehamman.co.za/ |
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temtronic
Joined: 01 Jul 2010
Posts: 9255
Location: Greensville,Ontario
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| Posted: Sat Jan 07, 2023 9:35 am |
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One of the best ways to learn CCS C , is to look at the 100s of example programs that CCS supplies in the 'examples' folder !
You can also see working programs in the 'code library' on this forum.
I went to the website for that book, but didn't see any examples of his code |
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sifirzero1
Joined: 14 Dec 2022
Posts: 43
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| Posted: Sat Jan 07, 2023 9:42 am |
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| because the book is on sale. didn't share much |
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temtronic
Joined: 01 Jul 2010
Posts: 9255
Location: Greensville,Ontario
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| Posted: Sat Jan 07, 2023 10:26 am |
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Most writers will show a sample of what's inside the book.
I will NOT buy that book without seeing something.
Would you buy a car without actually seeing it ? |
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sifirzero1
Joined: 14 Dec 2022
Posts: 43
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| Posted: Sat Jan 07, 2023 10:32 am |
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| website has samples at the bottom of the page and images from the book |
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temtronic
Joined: 01 Jul 2010
Posts: 9255
Location: Greensville,Ontario
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| Posted: Sat Jan 07, 2023 10:47 am |
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hmm, I didn't scroll down to the end...just to the 'buy it now' info...
I did download the 7segment code.
It has an error in the first few lines..
hint the PIC doesn't have a 16 bit ADC... |
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sifirzero1
Joined: 14 Dec 2022
Posts: 43
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| Posted: Sat Jan 07, 2023 11:25 pm |
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| shall I not buy the book? is it naughty |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Sun Jan 08, 2023 1:50 pm |
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I say don't buy. His Accelerometer program has bugs.
http://janniehamman.co.za/progs/accel355.c
In his main loop, he is not doing the acquisition delay after changing the
adc channels:
| Code: | void main()
{
setup_adc_ports(sAN0|sAN1|sAN2);
setup_adc(ADC_CLOCK_INTERNAL);
while(TRUE)
{
set_adc_channel(0);
rax=read_adc();
ax=calcxy(rax);
set_adc_channel(1);
ray=read_adc();
ay=calcxy(ray);
set_adc_channel(2);
raz=read_adc();
az=calcz(raz);
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The acquisition time is given in this section of the 16F88 data sheet:
12.1 A/D Acquisition Requirements (page 119)
It is listed in the equations as 19.72 us. His code should look like this:
| Quote: |
set_adc_channel(0);
delay_us(20);
rax=read_adc();
ax=calcxy(rax);
set_adc_channel(1);
delay_us(20);
ray=read_adc();
ay=calcxy(ray);
set_adc_channel(2);
delay_us(20);
raz=read_adc();
az=calcz(raz);
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Also, his ADC setup is this:
| Code: | | setup_adc(ADC_CLOCK_INTERNAL); |
But the 16F88 data sheet says on page 120:
| Quote: | 2: When the device frequencies are greater than 1 MHz, the RC A/D
conversion clock source is only recommended for Sleep operation. |
He is running at 8MHz, therefore his setup should be:
| Code: | | setup_adc(ADC_CLOCK_DIV_16) |
The DIV_16 value comes from this table in the PIC data sheet:
TABLE 12-1: TAD vs. MAXIMUM DEVICE OPERATING FREQUENCIES
on page 120. 16F88 data sheet:
https://ww1.microchip.com/downloads/en/devicedoc/30487c.pdf |
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