RL78 F13 - Needed sample code to understand DTC functionality with ADC Scan One shot mode

Question

Dear Renesas community, 
 
 I'm looking for sample code to understand DTC with ADC scan one shot mode. 
 Needed scenario like 4 ADC channels conversion data want to transfer from ADCR to 4 different variables at each INTAD interrupt. 
 and 4 variables like arr[index], index value will be incremented at each INTAD interrupt. and index will be reseted after 4th channel ADC conversion 
 
 Could you please provide the sample code for the same? 
 
 Thanks & Regards, 
 Meet

AZ-Renesas · Accepted Answer

Hello, 
 Please find the attached demo project. 
 ADC_DTC_F13.zip 
 ANI0-ANI3 channels are scanned and stored at 0xFF400 address in RAM using DTC. 
 The destination address is usually specified in Code Generator. You can declare your array to be stored in a specific address using #pragma (as done in the example) and use this address as a destination address. 
 Please go through the DTC settings on Code Generator. 
 Let me know if you have any questions. 
 Regards

AZ-Renesas · Answer

1) The reserved areas are explained on the pages I mentioned. If the project uses a flash library, the self-RAM area should also be reserved. You can find the self-RAM area of your device on this document. 
 https://www.renesas.com/us/en/document/mat/rl78-family-self-ram-list-flash-self-programming-library-rev305 
 2) The #pragma address macro is used to tell the linker to put the adc_buffer in the specific address. It does not reserve anything in memory. 
 3) You could create a new section in RAM, but you would still need to tell the linker to put the adc_buffer inside this section. So you do not gain anything from doing this. It is basically the same process.

Meet · Answer

Hi I found the answer, it is generating as 01 only. Thanks!

AZ-Renesas · Answer

Something seemed not to work, but I build again and now it seems ok. Please retry with the attached project. 
 6886.ADC_DTC_F13.zip

AZ-Renesas · Answer

1) Well, if you decide to have a buffer in RAM to store the results, you need to know the memory range of RAM and select an address. 
 But some regions of RAM are used for other purposes too, so you need to make sure the buffer does not overlap with them. (for example trace area for debugger, self-RAM area for flash libraries etc). 
 Please take a look on page 107-108. 
 2) Yes, but the interrupt that called the ISR will not trigger the DTC. The next interrupt will. 
 3) The address is incremented automatically if it selected on Code Generator. The type of data can be different but if you have a 10-bit result, what else can it be ? 
 For Repeat mode please look into section 19.3.3 
 https://www.renesas.com/us/en/document/mah/rl78f13-f14-users-manual-hardware-rev220?r=1054256 
 Regards

RL78 F13 - Needed sample code to understand DTC functionality with ADC Scan One shot mode

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