Hi, I'm using LPC935 and I want to set the built in AD converter. I have to use P0.0 pin, so I have written the following code (The pin is configured as input only): void InitADC() { ADCON0 = 0x45; //Enable ADC0 and Interrupt on conversion done //Single mode ADMODA = 0x01; //Freq div ADMODB = 0x40; //CCLK/3 //Select P00 ADINS = 0x01; //Enable P00 input EAD = EA = 1; //Enable IRQ } The matter is that even I run this piece of code the ADC settings are still the same. Even if I play step by step, every line of this routine can't make any modificatione in ADC registers. What's the matter? Thanx in advance
Hi, when I first enter in the routine and proceed step by step, with the "Peripheral-->ADConverter -->ADC0/DAC0" of the ide open, for every line that I go through, there aren't changes in the appropriate register, for example: if before the line: ADMODB |= 0x40; (*) The ADMOB register is: 0x00 even after the execution of instruction (*) the ADMOB is always 0x00!!!
if before the line: ADMODB |= 0x40; (*) The ADMOB register is: 0x00 even after the execution of instruction (*) the ADMOB is always 0x00!!! PLEASE give COMPLETE information. HOW do you determine this? Erik
In the IDE (uVision3) menu, look in Peripherals--> A/D Converter ---> ADC0/1 Thera are all register concern to ADC. But even if I do in the "command output window" of the IDE: eval ADMOB the result is always 0x00
In the IDE (uVision3) menu, look in Peripherals--> A/D Converter ---> ADC0/1 I have no idea what you mean, are you saying this is with the simulator? if this is so, who says that the problem is not the simulator? eRIK
I'm not using the simulator, I'm using the emulator. The HW that is connected to run well from the electric standpoint, no electrical conflict is alive. What is unclear to you?
What is unclear to you? why it does not work because I have the very same working. Erik
one thing. I have no idea if this is your problem, but you are doing one thing "nonstandard" It is customary to do all port configuration at the very beginning (right after the jump from 0) not as part of individual initializations. Erik
what emulator, I use CEIBO. Erik
the emulator is EPM900 from Keil, I cannot do anymore, I'm sure from electrical standpoint and from sw too but the system doesn't run anyway...
Are you using an LPC935 Bondout chip in EPM900. Reinhard
I'm using Keil EPM900 Emulator for Philips P89LPC9xx
Q: "Are you using an LPC935 Bondout chip in EPM900?" A: "I'm using Keil EPM900 Emulator for Philips P89LPC9xx" analogy Q: are you eating an apple or an orange?" A: "I bought it at the fruit stand" Erik
dear Erik, I'm a newbye on ucontroller and I don't know what "bondout" stands for. I'm fighting very hard on this problem and I have no idea about fix it, so if you want to joke you can but it's better for me if you don't, I thank U for your support I'm sure anyway that if everybody has your knowledge that world will goes better but unfortunately the things are different...
I'm a newbye on ucontroller and I don't know what "bondout" stands for. then, another question: how many pins does the chip in your emulator have (a bondout has more than a regular) Erik
Hi, there are 28 pin. I've connected, for test purpose, channel 1 of ADC0, and it point to pin number 3 if I have not done any mistake. Do you think that the problem is wrong wiring?
Then you do NOT have a bondout chip and you can NOT emulate. Erik Is it not amazing how simple an answer can be when all facts come to light. Please keep that in mind next time you post 1) chip 2) frequency 3) type of board (my own/ Keil / acme ...) 4) code snipped (if appropiate) 5) tool(s)