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471 | cascade | 1 | /**************************************************************************** |
2039 | - | 2 | * Copyright (C) 2009-2014 by Claas Anders "CaScAdE" Rathje * |
471 | cascade | 3 | * admiralcascade@gmail.com * |
4 | * Project-URL: http://www.mylifesucks.de/oss/c-osd/ * |
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5 | * * |
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6 | * This program is free software; you can redistribute it and/or modify * |
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7 | * it under the terms of the GNU General Public License as published by * |
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8 | * the Free Software Foundation; either version 2 of the License. * |
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9 | * * |
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10 | * This program is distributed in the hope that it will be useful, * |
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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13 | * GNU General Public License for more details. * |
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14 | * * |
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15 | * You should have received a copy of the GNU General Public License * |
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16 | * along with this program; if not, write to the * |
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17 | * Free Software Foundation, Inc., * |
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18 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * |
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19 | ****************************************************************************/ |
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20 | |||
762 | - | 21 | #ifndef _SPI_H |
22 | #define _SPI_H |
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23 | |||
507 | cascade | 24 | /* |
25 | * structs 'n union for easy SPI transfer |
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26 | */ |
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27 | typedef struct { |
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761 | - | 28 | int16_t ampere; |
29 | int32_t mah; |
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30 | int16_t volt; |
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507 | cascade | 31 | } __attribute__((packed)) SPI_strom_data_t; |
32 | |||
33 | typedef struct { |
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761 | - | 34 | uint8_t c[10]; |
35 | uint8_t chk; |
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507 | cascade | 36 | } __attribute__((packed)) SPI_char_buffer_t; |
37 | |||
38 | union SPI_buffer_t { |
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761 | - | 39 | SPI_strom_data_t data; |
40 | SPI_char_buffer_t buffer; |
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507 | cascade | 41 | }; |
42 | |||
43 | volatile union SPI_buffer_t SPI_buffer; |
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44 | |||
471 | cascade | 45 | /** |
46 | * SPI interrupt handler |
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47 | */ |
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48 | ISR(SPI_STC_vect); |
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49 | |||
50 | /** |
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51 | * init the SPI as master |
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52 | */ |
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53 | void SpiMasterInit(void); |
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54 | |||
55 | /** |
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56 | * check if SPI transfer is still busy |
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57 | */ |
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58 | int TransferIsBusy(void); |
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59 | |||
60 | /** |
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507 | cascade | 61 | * start a new transfer with length <len> |
471 | cascade | 62 | */ |
507 | cascade | 63 | void StartTransfer(uint16_t); |
64 | |||
65 | /** |
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66 | * send next command through spi |
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67 | */ |
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68 | void spi_send_next(); |
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762 | - | 69 | |
70 | #endif |