Hardware Design: SIE
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| 1 | /* ADC Peripheral.c |
| 2 | |
| 3 | Copyright (C) 2010 |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 2 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program; if not, write to the Free Software |
| 17 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ |
| 18 | |
| 19 | #include <stdio.h> |
| 20 | #include <unistd.h> |
| 21 | |
| 22 | #include "jz_adc_peripheral.h" |
| 23 | |
| 24 | void ADCTest(JZ_REG * ADCBuffer) |
| 25 | { |
| 26 | if(ADCBuffer!=0) |
| 27 | { |
| 28 | int aggregate=0; float errorT=0; |
| 29 | /******************************* TEST 1 ***********************************/ |
| 30 | printf("\nINIT TEST1: Autoselft {(Vref+) - (Vref-)}/2 -> Return 0x0200 \n"); |
| 31 | ADCConfig(ADCBuffer,ADC_CMD_SET_AUTOSELFT_1); |
| 32 | ADCConfig(ADCBuffer,ADC_CMD_READ_AUTOSELFT_1); |
| 33 | for(int i=ADC_BUFFER_OFFSET; i< ADC_BUFFER_LEN/2+ADC_BUFFER_OFFSET; i++) |
| 34 | { |
| 35 | aggregate += (ADCBuffer[i]&0xFFFF + ((ADCBuffer[i]>>16)&0x0FFF)); |
| 36 | printf("[%08X]", ADCBuffer[i]); |
| 37 | } |
| 38 | errorT=(aggregate/16)*100/0x200; |
| 39 | if((errorT<95)||(errorT>105)) |
| 40 | printf("\n**WARNING** Test FAILED.\n\n"); |
| 41 | else |
| 42 | printf("\nTest OK\n\n"); |
| 43 | |
| 44 | fflush (stdout); |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | void ADCPowerDown(JZ_REG * ADCBuffer) |
| 49 | { |
| 50 | ADCConfig(ADCBuffer,ADC_CMD_SET_POWER_DOWN); |
| 51 | } |
| 52 | |
| 53 | JZ_REG * ADCTakeSamples(JZ_REG * ADCBuffer,int CHANNEL) |
| 54 | { |
| 55 | ADCConfig(ADCBuffer,ADC_CMD_SET_CHANNEL0+CHANNEL); |
| 56 | ADCConfig(ADCBuffer,ADC_CMD_READ_CHANNEL0+CHANNEL); |
| 57 | return (JZ_REG*)(ADCBuffer+ADC_BUFFER_OFFSET); |
| 58 | } |
| 59 | |
| 60 | void ADCConfig(JZ_REG * ADCBuffer,uchar CMD) |
| 61 | { |
| 62 | if(ADCBuffer!=0) |
| 63 | { |
| 64 | ADCBuffer[0] = (((ADC_MUX_CHANNELS<<6) + CMD)<<24) + \ |
| 65 | ((ADC_BUFFER_LEN+ADC_BUFFER_OFFSET*2) << 8) + \ |
| 66 | (ADC_SPI_CLKDIV); |
| 67 | while(ADCCheckBufferFull(ADCBuffer)) usleep (10); |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | int ADCCheckBufferFull(JZ_REG * ADCBuffer) |
| 72 | { |
| 73 | if(ADCBuffer!=0) |
| 74 | { |
| 75 | return ADCBuffer[0]&0x20000000; |
| 76 | } |
| 77 | return 0; |
| 78 | } |
| 79 |
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